./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix028_tso.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/mix028_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/mix028_tso.i ./goblint.2024-06-19_11-23-25.files/protection/mix028_tso.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-7724a2d-m [2024-06-27 20:14:54,341 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:14:54,420 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:14:54,425 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:14:54,425 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:14:54,448 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:14:54,449 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:14:54,449 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:14:54,450 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:14:54,453 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:14:54,453 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:14:54,453 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:14:54,454 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:14:54,455 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:14:54,455 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:14:54,455 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:14:54,456 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:14:54,456 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:14:54,456 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:14:54,456 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:14:54,456 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:14:54,457 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:14:54,457 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:14:54,457 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:14:54,457 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:14:54,457 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:14:54,458 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:14:54,458 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:14:54,458 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:14:54,459 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:14:54,459 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:14:54,459 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:14:54,460 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:14:54,460 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:14:54,460 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:14:54,460 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:14:54,460 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:14:54,461 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:14:54,461 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:14:54,461 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:14:54,461 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:14:54,461 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:14:54,461 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:14:54,462 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:14:54,665 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:14:54,692 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:14:54,696 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:14:54,697 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:14:54,698 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:14:54,699 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix028_tso.yml/witness.yml [2024-06-27 20:14:54,870 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:14:54,871 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:14:54,872 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix028_tso.i [2024-06-27 20:14:55,959 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:14:56,154 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:14:56,155 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix028_tso.i [2024-06-27 20:14:56,166 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c5667046/1808dce0402147bab1f5062a143bc67f/FLAG47530b86f [2024-06-27 20:14:56,180 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c5667046/1808dce0402147bab1f5062a143bc67f [2024-06-27 20:14:56,180 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:14:56,181 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:14:56,184 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:14:56,184 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:14:56,188 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:14:56,188 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:14:54" (1/2) ... [2024-06-27 20:14:56,190 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@447a54d1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:14:56, skipping insertion in model container [2024-06-27 20:14:56,190 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:14:54" (1/2) ... [2024-06-27 20:14:56,191 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@549d9c51 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:14:56, skipping insertion in model container [2024-06-27 20:14:56,192 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:14:56" (2/2) ... [2024-06-27 20:14:56,192 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@447a54d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:14:56, skipping insertion in model container [2024-06-27 20:14:56,192 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:14:56" (2/2) ... [2024-06-27 20:14:56,193 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:14:56,265 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:14:56,266 INFO L97 edCorrectnessWitness]: Location invariant before [L836-L836] (((((((((((((((((! multithreaded || y$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) [2024-06-27 20:14:56,266 INFO L97 edCorrectnessWitness]: Location invariant before [L834-L834] (((((((((((((((((! multithreaded || y$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) [2024-06-27 20:14:56,266 INFO L97 edCorrectnessWitness]: Location invariant before [L837-L837] (((((((((((((((((! multithreaded || y$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) [2024-06-27 20:14:56,266 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:14:56,266 INFO L106 edCorrectnessWitness]: ghost_update [L832-L832] multithreaded = 1; [2024-06-27 20:14:56,303 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:14:56,607 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:14:56,620 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:14:56,734 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:14:56,764 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:14:56,764 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:14:56 WrapperNode [2024-06-27 20:14:56,765 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:14:56,765 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:14:56,766 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:14:56,766 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:14:56,771 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:14:56" (1/1) ... [2024-06-27 20:14:56,783 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:14:56" (1/1) ... [2024-06-27 20:14:56,822 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 166 [2024-06-27 20:14:56,827 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:14:56,831 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:14:56,832 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:14:56,832 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:14:56,840 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:14:56" (1/1) ... [2024-06-27 20:14:56,840 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:14:56" (1/1) ... [2024-06-27 20:14:56,843 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:14:56" (1/1) ... [2024-06-27 20:14:56,855 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]. [2024-06-27 20:14:56,855 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:14:56" (1/1) ... [2024-06-27 20:14:56,855 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:14:56" (1/1) ... [2024-06-27 20:14:56,862 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:14:56" (1/1) ... [2024-06-27 20:14:56,863 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:14:56" (1/1) ... [2024-06-27 20:14:56,865 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:14:56" (1/1) ... [2024-06-27 20:14:56,866 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:14:56" (1/1) ... [2024-06-27 20:14:56,868 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:14:56,869 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:14:56,869 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:14:56,869 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:14:56,870 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:14:56" (1/1) ... [2024-06-27 20:14:56,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:14:56,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:14:56,890 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) [2024-06-27 20:14:56,955 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:14:56,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:14:56,956 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:14:56,956 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:14:56,957 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:14:56,957 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:14:56,957 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 20:14:56,960 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 20:14:56,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:14:56,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:14:56,931 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 [2024-06-27 20:14:56,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:14:56,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:14:56,962 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 20:14:57,069 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:14:57,071 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:14:57,441 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:14:57,443 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:14:57,590 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:14:57,591 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:14:57,591 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:14:57 BoogieIcfgContainer [2024-06-27 20:14:57,591 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:14:57,594 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:14:57,594 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:14:57,596 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:14:57,597 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:14:54" (1/4) ... [2024-06-27 20:14:57,597 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c9cafbb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:14:57, skipping insertion in model container [2024-06-27 20:14:57,597 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:14:56" (2/4) ... [2024-06-27 20:14:57,598 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c9cafbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:14:57, skipping insertion in model container [2024-06-27 20:14:57,598 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:14:56" (3/4) ... [2024-06-27 20:14:57,598 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c9cafbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:14:57, skipping insertion in model container [2024-06-27 20:14:57,599 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:14:57" (4/4) ... [2024-06-27 20:14:57,599 INFO L112 eAbstractionObserver]: Analyzing ICFG mix028_tso.i [2024-06-27 20:14:57,612 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:14:57,612 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 20:14:57,612 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:14:57,648 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:14:57,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-27 20:14:57,701 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-27 20:14:57,702 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:14:57,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 20:14:57,704 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-27 20:14:57,710 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-27 20:14:57,718 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:14:57,723 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;@1f9b61e2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:14:57,724 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 20:14:57,728 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:14:57,728 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 20:14:57,728 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:14:57,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:57,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:14:57,729 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)] === [2024-06-27 20:14:57,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:57,740 INFO L85 PathProgramCache]: Analyzing trace with hash 399969166, now seen corresponding path program 1 times [2024-06-27 20:14:57,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:57,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058779369] [2024-06-27 20:14:57,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:57,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:57,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:58,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:58,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:58,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058779369] [2024-06-27 20:14:58,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058779369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:58,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:58,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:14:58,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231842549] [2024-06-27 20:14:58,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:58,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:14:58,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:58,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:14:58,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:14:58,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 20:14:58,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:58,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:58,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 20:14:58,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:59,009 INFO L124 PetriNetUnfolderBase]: 1359/2109 cut-off events. [2024-06-27 20:14:59,009 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-27 20:14:59,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4223 conditions, 2109 events. 1359/2109 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10198 event pairs, 941 based on Foata normal form. 1/2045 useless extension candidates. Maximal degree in co-relation 4211. Up to 2029 conditions per place. [2024-06-27 20:14:59,026 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 32 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-27 20:14:59,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 171 flow [2024-06-27 20:14:59,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:14:59,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:14:59,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-27 20:14:59,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-27 20:14:59,038 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 72 transitions. [2024-06-27 20:14:59,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 171 flow [2024-06-27 20:14:59,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 20:14:59,043 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-27 20:14:59,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-27 20:14:59,048 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-27 20:14:59,048 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-27 20:14:59,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:59,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:59,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:14:59,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:14:59,049 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)] === [2024-06-27 20:14:59,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:59,050 INFO L85 PathProgramCache]: Analyzing trace with hash 2118308141, now seen corresponding path program 1 times [2024-06-27 20:14:59,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:59,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662462689] [2024-06-27 20:14:59,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:59,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:59,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:59,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:59,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:59,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662462689] [2024-06-27 20:14:59,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662462689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:59,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:59,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:14:59,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85061228] [2024-06-27 20:14:59,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:59,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:14:59,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:59,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:14:59,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:14:59,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:14:59,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:59,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:59,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:14:59,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:59,842 INFO L124 PetriNetUnfolderBase]: 1560/2337 cut-off events. [2024-06-27 20:14:59,843 INFO L125 PetriNetUnfolderBase]: For 459/459 co-relation queries the response was YES. [2024-06-27 20:14:59,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5353 conditions, 2337 events. 1560/2337 cut-off events. For 459/459 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10932 event pairs, 930 based on Foata normal form. 3/2339 useless extension candidates. Maximal degree in co-relation 5341. Up to 2302 conditions per place. [2024-06-27 20:14:59,851 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 40 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-06-27 20:14:59,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 240 flow [2024-06-27 20:14:59,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:14:59,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:14:59,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2024-06-27 20:14:59,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-27 20:14:59,853 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 90 transitions. [2024-06-27 20:14:59,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 240 flow [2024-06-27 20:14:59,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:14:59,854 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-27 20:14:59,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-27 20:14:59,855 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-27 20:14:59,855 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-27 20:14:59,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:59,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:59,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:14:59,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:14:59,856 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:14:59,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:59,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1243043897, now seen corresponding path program 1 times [2024-06-27 20:14:59,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:59,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945600357] [2024-06-27 20:14:59,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:59,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:59,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:00,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:00,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:00,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945600357] [2024-06-27 20:15:00,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945600357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:00,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:00,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 20:15:00,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418311351] [2024-06-27 20:15:00,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:00,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 20:15:00,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:00,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 20:15:00,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 20:15:00,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:15:00,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:00,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:00,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:15:00,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:00,748 INFO L124 PetriNetUnfolderBase]: 1568/2357 cut-off events. [2024-06-27 20:15:00,748 INFO L125 PetriNetUnfolderBase]: For 1342/1342 co-relation queries the response was YES. [2024-06-27 20:15:00,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5990 conditions, 2357 events. 1568/2357 cut-off events. For 1342/1342 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11219 event pairs, 669 based on Foata normal form. 5/2361 useless extension candidates. Maximal degree in co-relation 5976. Up to 2248 conditions per place. [2024-06-27 20:15:00,760 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 53 selfloop transitions, 16 changer transitions 0/74 dead transitions. [2024-06-27 20:15:00,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 74 transitions, 394 flow [2024-06-27 20:15:00,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:15:00,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:15:00,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-27 20:15:00,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5756097560975609 [2024-06-27 20:15:00,765 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 5 states and 118 transitions. [2024-06-27 20:15:00,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 74 transitions, 394 flow [2024-06-27 20:15:00,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 74 transitions, 380 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 20:15:00,769 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 235 flow [2024-06-27 20:15:00,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=235, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2024-06-27 20:15:00,771 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-27 20:15:00,771 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 235 flow [2024-06-27 20:15:00,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:00,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:00,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:00,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:15:00,772 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)] === [2024-06-27 20:15:00,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:00,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1154035042, now seen corresponding path program 1 times [2024-06-27 20:15:00,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:00,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170349777] [2024-06-27 20:15:00,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:00,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:00,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:01,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:01,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:01,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170349777] [2024-06-27 20:15:01,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170349777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:01,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:01,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:15:01,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008967991] [2024-06-27 20:15:01,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:01,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:15:01,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:01,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:15:01,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:15:01,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:15:01,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 235 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:01,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:01,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:15:01,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:01,777 INFO L124 PetriNetUnfolderBase]: 1580/2377 cut-off events. [2024-06-27 20:15:01,777 INFO L125 PetriNetUnfolderBase]: For 3185/3187 co-relation queries the response was YES. [2024-06-27 20:15:01,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7134 conditions, 2377 events. 1580/2377 cut-off events. For 3185/3187 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11367 event pairs, 481 based on Foata normal form. 12/2388 useless extension candidates. Maximal degree in co-relation 7117. Up to 2216 conditions per place. [2024-06-27 20:15:01,789 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 57 selfloop transitions, 19 changer transitions 0/81 dead transitions. [2024-06-27 20:15:01,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 81 transitions, 497 flow [2024-06-27 20:15:01,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:15:01,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:15:01,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-27 20:15:01,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-27 20:15:01,791 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 235 flow. Second operand 6 states and 135 transitions. [2024-06-27 20:15:01,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 81 transitions, 497 flow [2024-06-27 20:15:01,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 81 transitions, 489 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-27 20:15:01,794 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 291 flow [2024-06-27 20:15:01,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=291, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-06-27 20:15:01,795 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2024-06-27 20:15:01,795 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 291 flow [2024-06-27 20:15:01,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:01,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:01,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:01,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:15:01,796 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)] === [2024-06-27 20:15:01,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:01,796 INFO L85 PathProgramCache]: Analyzing trace with hash 123911033, now seen corresponding path program 1 times [2024-06-27 20:15:01,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:01,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428945298] [2024-06-27 20:15:01,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:01,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:01,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:02,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:02,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:02,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428945298] [2024-06-27 20:15:02,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428945298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:02,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:02,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:15:02,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773315396] [2024-06-27 20:15:02,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:02,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:15:02,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:02,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:15:02,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:15:02,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:15:02,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 291 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:02,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:02,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:15:02,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:02,629 INFO L124 PetriNetUnfolderBase]: 1368/2118 cut-off events. [2024-06-27 20:15:02,629 INFO L125 PetriNetUnfolderBase]: For 4021/4021 co-relation queries the response was YES. [2024-06-27 20:15:02,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6889 conditions, 2118 events. 1368/2118 cut-off events. For 4021/4021 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10397 event pairs, 562 based on Foata normal form. 2/2099 useless extension candidates. Maximal degree in co-relation 6868. Up to 2036 conditions per place. [2024-06-27 20:15:02,671 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 49 selfloop transitions, 8 changer transitions 0/62 dead transitions. [2024-06-27 20:15:02,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 62 transitions, 433 flow [2024-06-27 20:15:02,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:15:02,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:15:02,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-27 20:15:02,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 20:15:02,673 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 291 flow. Second operand 5 states and 90 transitions. [2024-06-27 20:15:02,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 62 transitions, 433 flow [2024-06-27 20:15:02,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 62 transitions, 383 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 20:15:02,680 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 265 flow [2024-06-27 20:15:02,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=265, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2024-06-27 20:15:02,681 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 14 predicate places. [2024-06-27 20:15:02,681 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 265 flow [2024-06-27 20:15:02,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:02,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:02,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:02,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:15:02,682 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)] === [2024-06-27 20:15:02,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:02,682 INFO L85 PathProgramCache]: Analyzing trace with hash -454848311, now seen corresponding path program 1 times [2024-06-27 20:15:02,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:02,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841443689] [2024-06-27 20:15:02,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:02,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:02,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:03,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:03,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:03,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841443689] [2024-06-27 20:15:03,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841443689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:03,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:03,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:15:03,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345231840] [2024-06-27 20:15:03,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:03,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:15:03,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:03,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:15:03,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:15:03,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:15:03,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 265 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:03,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:03,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:15:03,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:03,646 INFO L124 PetriNetUnfolderBase]: 1358/2140 cut-off events. [2024-06-27 20:15:03,647 INFO L125 PetriNetUnfolderBase]: For 4716/4716 co-relation queries the response was YES. [2024-06-27 20:15:03,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6907 conditions, 2140 events. 1358/2140 cut-off events. For 4716/4716 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10571 event pairs, 526 based on Foata normal form. 4/2135 useless extension candidates. Maximal degree in co-relation 6884. Up to 2004 conditions per place. [2024-06-27 20:15:03,661 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 54 selfloop transitions, 11 changer transitions 0/70 dead transitions. [2024-06-27 20:15:03,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 70 transitions, 453 flow [2024-06-27 20:15:03,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:15:03,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:15:03,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-27 20:15:03,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349593495934959 [2024-06-27 20:15:03,663 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 265 flow. Second operand 6 states and 107 transitions. [2024-06-27 20:15:03,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 70 transitions, 453 flow [2024-06-27 20:15:03,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 70 transitions, 431 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 20:15:03,667 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 297 flow [2024-06-27 20:15:03,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=297, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2024-06-27 20:15:03,670 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-27 20:15:03,670 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 297 flow [2024-06-27 20:15:03,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:03,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:03,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:03,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:15:03,671 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:15:03,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:03,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1649140628, now seen corresponding path program 1 times [2024-06-27 20:15:03,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:03,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228332359] [2024-06-27 20:15:03,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:03,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:03,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:04,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:04,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:04,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228332359] [2024-06-27 20:15:04,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228332359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:04,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:04,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:15:04,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001510525] [2024-06-27 20:15:04,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:04,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:15:04,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:04,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:15:04,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:15:04,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:15:04,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 297 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:04,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:04,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:15:04,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:04,683 INFO L124 PetriNetUnfolderBase]: 1571/2365 cut-off events. [2024-06-27 20:15:04,683 INFO L125 PetriNetUnfolderBase]: For 7224/7228 co-relation queries the response was YES. [2024-06-27 20:15:04,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8339 conditions, 2365 events. 1571/2365 cut-off events. For 7224/7228 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11152 event pairs, 635 based on Foata normal form. 8/2372 useless extension candidates. Maximal degree in co-relation 8316. Up to 2253 conditions per place. [2024-06-27 20:15:04,701 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 54 selfloop transitions, 19 changer transitions 0/77 dead transitions. [2024-06-27 20:15:04,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 77 transitions, 539 flow [2024-06-27 20:15:04,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:15:04,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:15:04,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-27 20:15:04,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-27 20:15:04,703 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 297 flow. Second operand 6 states and 110 transitions. [2024-06-27 20:15:04,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 77 transitions, 539 flow [2024-06-27 20:15:04,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 77 transitions, 509 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 20:15:04,708 INFO L231 Difference]: Finished difference. Result has 60 places, 57 transitions, 339 flow [2024-06-27 20:15:04,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=339, PETRI_PLACES=60, PETRI_TRANSITIONS=57} [2024-06-27 20:15:04,710 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-06-27 20:15:04,710 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 57 transitions, 339 flow [2024-06-27 20:15:04,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:04,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:04,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:04,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:15:04,711 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)] === [2024-06-27 20:15:04,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:04,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1180546856, now seen corresponding path program 2 times [2024-06-27 20:15:04,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:04,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744408253] [2024-06-27 20:15:04,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:04,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:04,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:05,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:05,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:05,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744408253] [2024-06-27 20:15:05,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744408253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:05,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:05,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:15:05,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974722115] [2024-06-27 20:15:05,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:05,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:15:05,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:05,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:15:05,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:15:05,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:15:05,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 57 transitions, 339 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:05,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:05,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:15:05,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:05,730 INFO L124 PetriNetUnfolderBase]: 1559/2338 cut-off events. [2024-06-27 20:15:05,730 INFO L125 PetriNetUnfolderBase]: For 8650/8654 co-relation queries the response was YES. [2024-06-27 20:15:05,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8508 conditions, 2338 events. 1559/2338 cut-off events. For 8650/8654 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10921 event pairs, 649 based on Foata normal form. 3/2338 useless extension candidates. Maximal degree in co-relation 8484. Up to 2237 conditions per place. [2024-06-27 20:15:05,740 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 48 selfloop transitions, 20 changer transitions 0/72 dead transitions. [2024-06-27 20:15:05,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 72 transitions, 513 flow [2024-06-27 20:15:05,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:15:05,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:15:05,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-27 20:15:05,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-27 20:15:05,743 INFO L175 Difference]: Start difference. First operand has 60 places, 57 transitions, 339 flow. Second operand 6 states and 106 transitions. [2024-06-27 20:15:05,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 72 transitions, 513 flow [2024-06-27 20:15:05,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 72 transitions, 484 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 20:15:05,755 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 358 flow [2024-06-27 20:15:05,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=358, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2024-06-27 20:15:05,758 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2024-06-27 20:15:05,758 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 358 flow [2024-06-27 20:15:05,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:05,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:05,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:05,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:15:05,759 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)] === [2024-06-27 20:15:05,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:05,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1732407818, now seen corresponding path program 1 times [2024-06-27 20:15:05,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:05,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638962037] [2024-06-27 20:15:05,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:05,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:05,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:06,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:06,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:06,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638962037] [2024-06-27 20:15:06,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638962037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:06,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:06,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:15:06,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989078532] [2024-06-27 20:15:06,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:06,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:15:06,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:06,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:15:06,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:15:06,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:15:06,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 358 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:06,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:06,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:15:06,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:06,842 INFO L124 PetriNetUnfolderBase]: 1733/2611 cut-off events. [2024-06-27 20:15:06,842 INFO L125 PetriNetUnfolderBase]: For 11528/11528 co-relation queries the response was YES. [2024-06-27 20:15:06,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9886 conditions, 2611 events. 1733/2611 cut-off events. For 11528/11528 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 12489 event pairs, 546 based on Foata normal form. 8/2617 useless extension candidates. Maximal degree in co-relation 9861. Up to 2237 conditions per place. [2024-06-27 20:15:06,856 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 79 selfloop transitions, 39 changer transitions 0/122 dead transitions. [2024-06-27 20:15:06,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 122 transitions, 995 flow [2024-06-27 20:15:06,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:15:06,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:15:06,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:15:06,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46646341463414637 [2024-06-27 20:15:06,858 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 358 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:15:06,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 122 transitions, 995 flow [2024-06-27 20:15:06,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 122 transitions, 869 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 20:15:06,867 INFO L231 Difference]: Finished difference. Result has 68 places, 81 transitions, 579 flow [2024-06-27 20:15:06,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=579, PETRI_PLACES=68, PETRI_TRANSITIONS=81} [2024-06-27 20:15:06,868 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 26 predicate places. [2024-06-27 20:15:06,868 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 81 transitions, 579 flow [2024-06-27 20:15:06,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:06,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:06,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:06,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:15:06,869 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)] === [2024-06-27 20:15:06,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:06,869 INFO L85 PathProgramCache]: Analyzing trace with hash -416246752, now seen corresponding path program 2 times [2024-06-27 20:15:06,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:06,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746061735] [2024-06-27 20:15:06,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:06,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:06,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:07,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:07,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:07,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746061735] [2024-06-27 20:15:07,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746061735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:07,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:07,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:15:07,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307658397] [2024-06-27 20:15:07,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:07,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:15:07,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:07,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:15:07,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:15:07,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:15:07,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 81 transitions, 579 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:07,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:07,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:15:07,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:08,085 INFO L124 PetriNetUnfolderBase]: 1805/2725 cut-off events. [2024-06-27 20:15:08,085 INFO L125 PetriNetUnfolderBase]: For 14982/14984 co-relation queries the response was YES. [2024-06-27 20:15:08,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11341 conditions, 2725 events. 1805/2725 cut-off events. For 14982/14984 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 13155 event pairs, 550 based on Foata normal form. 12/2735 useless extension candidates. Maximal degree in co-relation 11312. Up to 2285 conditions per place. [2024-06-27 20:15:08,099 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 65 selfloop transitions, 48 changer transitions 0/117 dead transitions. [2024-06-27 20:15:08,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 117 transitions, 1001 flow [2024-06-27 20:15:08,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:15:08,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:15:08,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-27 20:15:08,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564459930313589 [2024-06-27 20:15:08,101 INFO L175 Difference]: Start difference. First operand has 68 places, 81 transitions, 579 flow. Second operand 7 states and 131 transitions. [2024-06-27 20:15:08,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 117 transitions, 1001 flow [2024-06-27 20:15:08,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 117 transitions, 973 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-27 20:15:08,112 INFO L231 Difference]: Finished difference. Result has 73 places, 88 transitions, 732 flow [2024-06-27 20:15:08,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=732, PETRI_PLACES=73, PETRI_TRANSITIONS=88} [2024-06-27 20:15:08,113 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 31 predicate places. [2024-06-27 20:15:08,113 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 88 transitions, 732 flow [2024-06-27 20:15:08,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:08,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:08,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:08,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:15:08,114 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)] === [2024-06-27 20:15:08,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:08,114 INFO L85 PathProgramCache]: Analyzing trace with hash 2057991610, now seen corresponding path program 3 times [2024-06-27 20:15:08,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:08,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475836602] [2024-06-27 20:15:08,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:08,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:08,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:08,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:08,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:08,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475836602] [2024-06-27 20:15:08,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475836602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:08,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:08,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:15:08,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915057770] [2024-06-27 20:15:08,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:08,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:15:08,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:08,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:15:08,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:15:08,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:15:08,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 88 transitions, 732 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:08,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:08,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:15:08,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:09,351 INFO L124 PetriNetUnfolderBase]: 1841/2768 cut-off events. [2024-06-27 20:15:09,352 INFO L125 PetriNetUnfolderBase]: For 18284/18290 co-relation queries the response was YES. [2024-06-27 20:15:09,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12341 conditions, 2768 events. 1841/2768 cut-off events. For 18284/18290 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 13309 event pairs, 560 based on Foata normal form. 7/2768 useless extension candidates. Maximal degree in co-relation 12310. Up to 2301 conditions per place. [2024-06-27 20:15:09,367 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 62 selfloop transitions, 60 changer transitions 0/126 dead transitions. [2024-06-27 20:15:09,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 126 transitions, 1266 flow [2024-06-27 20:15:09,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:15:09,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:15:09,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-27 20:15:09,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564459930313589 [2024-06-27 20:15:09,369 INFO L175 Difference]: Start difference. First operand has 73 places, 88 transitions, 732 flow. Second operand 7 states and 131 transitions. [2024-06-27 20:15:09,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 126 transitions, 1266 flow [2024-06-27 20:15:09,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 126 transitions, 1150 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-27 20:15:09,386 INFO L231 Difference]: Finished difference. Result has 76 places, 98 transitions, 880 flow [2024-06-27 20:15:09,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=636, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=880, PETRI_PLACES=76, PETRI_TRANSITIONS=98} [2024-06-27 20:15:09,386 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 34 predicate places. [2024-06-27 20:15:09,386 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 98 transitions, 880 flow [2024-06-27 20:15:09,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:09,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:09,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:09,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:15:09,387 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:15:09,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:09,388 INFO L85 PathProgramCache]: Analyzing trace with hash -411605122, now seen corresponding path program 4 times [2024-06-27 20:15:09,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:09,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485932533] [2024-06-27 20:15:09,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:09,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:09,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:09,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:09,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:09,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485932533] [2024-06-27 20:15:09,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485932533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:09,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:09,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:15:09,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728538797] [2024-06-27 20:15:09,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:09,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:15:09,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:09,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:15:09,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:15:10,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:15:10,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 98 transitions, 880 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:10,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:10,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:15:10,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:10,573 INFO L124 PetriNetUnfolderBase]: 1825/2751 cut-off events. [2024-06-27 20:15:10,574 INFO L125 PetriNetUnfolderBase]: For 18506/18512 co-relation queries the response was YES. [2024-06-27 20:15:10,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12164 conditions, 2751 events. 1825/2751 cut-off events. For 18506/18512 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 13207 event pairs, 569 based on Foata normal form. 7/2750 useless extension candidates. Maximal degree in co-relation 12132. Up to 2294 conditions per place. [2024-06-27 20:15:10,589 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 62 selfloop transitions, 58 changer transitions 0/124 dead transitions. [2024-06-27 20:15:10,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 124 transitions, 1240 flow [2024-06-27 20:15:10,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:15:10,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:15:10,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 20:15:10,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-27 20:15:10,590 INFO L175 Difference]: Start difference. First operand has 76 places, 98 transitions, 880 flow. Second operand 7 states and 130 transitions. [2024-06-27 20:15:10,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 124 transitions, 1240 flow [2024-06-27 20:15:10,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 124 transitions, 1144 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 20:15:10,642 INFO L231 Difference]: Finished difference. Result has 80 places, 98 transitions, 910 flow [2024-06-27 20:15:10,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=910, PETRI_PLACES=80, PETRI_TRANSITIONS=98} [2024-06-27 20:15:10,643 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 38 predicate places. [2024-06-27 20:15:10,643 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 98 transitions, 910 flow [2024-06-27 20:15:10,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:10,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:10,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:10,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:15:10,644 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:15:10,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:10,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1594980100, now seen corresponding path program 1 times [2024-06-27 20:15:10,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:10,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187313556] [2024-06-27 20:15:10,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:10,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:10,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:11,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:11,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:11,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187313556] [2024-06-27 20:15:11,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187313556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:11,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:11,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:15:11,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061101592] [2024-06-27 20:15:11,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:11,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:15:11,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:11,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:15:11,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:15:11,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:15:11,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 98 transitions, 910 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:11,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:11,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:15:11,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:12,265 INFO L124 PetriNetUnfolderBase]: 1610/2509 cut-off events. [2024-06-27 20:15:12,265 INFO L125 PetriNetUnfolderBase]: For 18046/18048 co-relation queries the response was YES. [2024-06-27 20:15:12,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11163 conditions, 2509 events. 1610/2509 cut-off events. For 18046/18048 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 12329 event pairs, 517 based on Foata normal form. 4/2496 useless extension candidates. Maximal degree in co-relation 11129. Up to 2349 conditions per place. [2024-06-27 20:15:12,282 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 103 selfloop transitions, 13 changer transitions 0/121 dead transitions. [2024-06-27 20:15:12,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 121 transitions, 1226 flow [2024-06-27 20:15:12,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:15:12,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:15:12,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 20:15:12,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:15:12,285 INFO L175 Difference]: Start difference. First operand has 80 places, 98 transitions, 910 flow. Second operand 7 states and 123 transitions. [2024-06-27 20:15:12,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 121 transitions, 1226 flow [2024-06-27 20:15:12,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 121 transitions, 1083 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 20:15:12,304 INFO L231 Difference]: Finished difference. Result has 81 places, 100 transitions, 826 flow [2024-06-27 20:15:12,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=767, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=826, PETRI_PLACES=81, PETRI_TRANSITIONS=100} [2024-06-27 20:15:12,305 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-27 20:15:12,305 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 100 transitions, 826 flow [2024-06-27 20:15:12,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:12,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:12,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:12,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:15:12,306 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)] === [2024-06-27 20:15:12,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:12,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1914180474, now seen corresponding path program 1 times [2024-06-27 20:15:12,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:12,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572888899] [2024-06-27 20:15:12,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:12,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:12,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:12,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:12,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:12,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572888899] [2024-06-27 20:15:12,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572888899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:12,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:12,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:15:12,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437163790] [2024-06-27 20:15:12,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:12,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:15:12,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:12,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:15:12,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:15:12,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:15:12,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 100 transitions, 826 flow. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:12,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:12,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:15:12,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:13,144 INFO L124 PetriNetUnfolderBase]: 1607/2525 cut-off events. [2024-06-27 20:15:13,144 INFO L125 PetriNetUnfolderBase]: For 18676/18678 co-relation queries the response was YES. [2024-06-27 20:15:13,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11118 conditions, 2525 events. 1607/2525 cut-off events. For 18676/18678 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 12589 event pairs, 564 based on Foata normal form. 1/2525 useless extension candidates. Maximal degree in co-relation 11083. Up to 2387 conditions per place. [2024-06-27 20:15:13,162 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 98 selfloop transitions, 8 changer transitions 0/111 dead transitions. [2024-06-27 20:15:13,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 111 transitions, 1084 flow [2024-06-27 20:15:13,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:15:13,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:15:13,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2024-06-27 20:15:13,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4195121951219512 [2024-06-27 20:15:13,164 INFO L175 Difference]: Start difference. First operand has 81 places, 100 transitions, 826 flow. Second operand 5 states and 86 transitions. [2024-06-27 20:15:13,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 111 transitions, 1084 flow [2024-06-27 20:15:13,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 111 transitions, 1043 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 20:15:13,179 INFO L231 Difference]: Finished difference. Result has 81 places, 103 transitions, 835 flow [2024-06-27 20:15:13,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=785, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=835, PETRI_PLACES=81, PETRI_TRANSITIONS=103} [2024-06-27 20:15:13,181 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-27 20:15:13,181 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 103 transitions, 835 flow [2024-06-27 20:15:13,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:13,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:13,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:13,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:15:13,182 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:15:13,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:13,182 INFO L85 PathProgramCache]: Analyzing trace with hash -18746278, now seen corresponding path program 1 times [2024-06-27 20:15:13,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:13,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561900339] [2024-06-27 20:15:13,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:13,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:13,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:13,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:13,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:13,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561900339] [2024-06-27 20:15:13,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561900339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:13,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:13,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:15:13,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879159692] [2024-06-27 20:15:13,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:13,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:15:13,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:13,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:15:13,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:15:13,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:15:13,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 103 transitions, 835 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:13,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:13,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:15:13,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:14,343 INFO L124 PetriNetUnfolderBase]: 1910/2902 cut-off events. [2024-06-27 20:15:14,343 INFO L125 PetriNetUnfolderBase]: For 26325/26327 co-relation queries the response was YES. [2024-06-27 20:15:14,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13481 conditions, 2902 events. 1910/2902 cut-off events. For 26325/26327 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 14210 event pairs, 562 based on Foata normal form. 8/2908 useless extension candidates. Maximal degree in co-relation 13445. Up to 2361 conditions per place. [2024-06-27 20:15:14,361 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 77 selfloop transitions, 65 changer transitions 0/146 dead transitions. [2024-06-27 20:15:14,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 146 transitions, 1463 flow [2024-06-27 20:15:14,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:15:14,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:15:14,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 20:15:14,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 20:15:14,362 INFO L175 Difference]: Start difference. First operand has 81 places, 103 transitions, 835 flow. Second operand 7 states and 133 transitions. [2024-06-27 20:15:14,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 146 transitions, 1463 flow [2024-06-27 20:15:14,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 146 transitions, 1435 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 20:15:14,381 INFO L231 Difference]: Finished difference. Result has 85 places, 115 transitions, 1102 flow [2024-06-27 20:15:14,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1102, PETRI_PLACES=85, PETRI_TRANSITIONS=115} [2024-06-27 20:15:14,382 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2024-06-27 20:15:14,383 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 115 transitions, 1102 flow [2024-06-27 20:15:14,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:14,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:14,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:14,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:15:14,383 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:15:14,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:14,384 INFO L85 PathProgramCache]: Analyzing trace with hash -18751858, now seen corresponding path program 2 times [2024-06-27 20:15:14,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:14,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106032146] [2024-06-27 20:15:14,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:14,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:14,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:14,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:14,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:14,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106032146] [2024-06-27 20:15:14,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106032146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:14,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:14,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:15:14,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213202904] [2024-06-27 20:15:14,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:14,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:15:14,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:14,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:15:14,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:15:14,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:15:14,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 115 transitions, 1102 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:14,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:14,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:15:14,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:15,504 INFO L124 PetriNetUnfolderBase]: 1890/2882 cut-off events. [2024-06-27 20:15:15,504 INFO L125 PetriNetUnfolderBase]: For 29847/29853 co-relation queries the response was YES. [2024-06-27 20:15:15,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13886 conditions, 2882 events. 1890/2882 cut-off events. For 29847/29853 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 14162 event pairs, 572 based on Foata normal form. 14/2894 useless extension candidates. Maximal degree in co-relation 13849. Up to 2345 conditions per place. [2024-06-27 20:15:15,520 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 74 selfloop transitions, 69 changer transitions 0/147 dead transitions. [2024-06-27 20:15:15,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 147 transitions, 1542 flow [2024-06-27 20:15:15,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:15:15,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:15:15,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-27 20:15:15,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47038327526132406 [2024-06-27 20:15:15,522 INFO L175 Difference]: Start difference. First operand has 85 places, 115 transitions, 1102 flow. Second operand 7 states and 135 transitions. [2024-06-27 20:15:15,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 147 transitions, 1542 flow [2024-06-27 20:15:15,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 147 transitions, 1422 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-27 20:15:15,549 INFO L231 Difference]: Finished difference. Result has 89 places, 115 transitions, 1131 flow [2024-06-27 20:15:15,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=982, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1131, PETRI_PLACES=89, PETRI_TRANSITIONS=115} [2024-06-27 20:15:15,549 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-27 20:15:15,550 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 115 transitions, 1131 flow [2024-06-27 20:15:15,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:15,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:15,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:15,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:15:15,552 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:15:15,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:15,552 INFO L85 PathProgramCache]: Analyzing trace with hash -516640596, now seen corresponding path program 3 times [2024-06-27 20:15:15,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:15,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283118731] [2024-06-27 20:15:15,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:15,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:15,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:16,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:16,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:16,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283118731] [2024-06-27 20:15:16,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283118731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:16,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:16,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:15:16,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881894029] [2024-06-27 20:15:16,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:16,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:15:16,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:16,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:15:16,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:15:16,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:15:16,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 115 transitions, 1131 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:16,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:16,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:15:16,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:16,669 INFO L124 PetriNetUnfolderBase]: 1874/2852 cut-off events. [2024-06-27 20:15:16,669 INFO L125 PetriNetUnfolderBase]: For 32659/32667 co-relation queries the response was YES. [2024-06-27 20:15:16,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13913 conditions, 2852 events. 1874/2852 cut-off events. For 32659/32667 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 13921 event pairs, 576 based on Foata normal form. 9/2859 useless extension candidates. Maximal degree in co-relation 13875. Up to 2332 conditions per place. [2024-06-27 20:15:16,683 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 72 selfloop transitions, 62 changer transitions 0/138 dead transitions. [2024-06-27 20:15:16,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 138 transitions, 1473 flow [2024-06-27 20:15:16,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:15:16,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:15:16,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 20:15:16,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-27 20:15:16,686 INFO L175 Difference]: Start difference. First operand has 89 places, 115 transitions, 1131 flow. Second operand 7 states and 124 transitions. [2024-06-27 20:15:16,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 138 transitions, 1473 flow [2024-06-27 20:15:16,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 138 transitions, 1240 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 20:15:16,709 INFO L231 Difference]: Finished difference. Result has 89 places, 115 transitions, 1033 flow [2024-06-27 20:15:16,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=898, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1033, PETRI_PLACES=89, PETRI_TRANSITIONS=115} [2024-06-27 20:15:16,710 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-27 20:15:16,710 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 115 transitions, 1033 flow [2024-06-27 20:15:16,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:16,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:16,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:16,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:15:16,711 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)] === [2024-06-27 20:15:16,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:16,711 INFO L85 PathProgramCache]: Analyzing trace with hash -801564482, now seen corresponding path program 1 times [2024-06-27 20:15:16,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:16,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992265090] [2024-06-27 20:15:16,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:16,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:16,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:17,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:17,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:17,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992265090] [2024-06-27 20:15:17,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992265090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:17,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:17,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:15:17,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801714249] [2024-06-27 20:15:17,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:17,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:15:17,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:17,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:15:17,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:15:17,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:15:17,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 115 transitions, 1033 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:17,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:17,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:15:17,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:17,696 INFO L124 PetriNetUnfolderBase]: 1661/2621 cut-off events. [2024-06-27 20:15:17,696 INFO L125 PetriNetUnfolderBase]: For 28656/28658 co-relation queries the response was YES. [2024-06-27 20:15:17,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12586 conditions, 2621 events. 1661/2621 cut-off events. For 28656/28658 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 13155 event pairs, 580 based on Foata normal form. 2/2622 useless extension candidates. Maximal degree in co-relation 12548. Up to 2461 conditions per place. [2024-06-27 20:15:17,710 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 112 selfloop transitions, 11 changer transitions 0/128 dead transitions. [2024-06-27 20:15:17,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 128 transitions, 1333 flow [2024-06-27 20:15:17,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:15:17,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:15:17,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-27 20:15:17,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-27 20:15:17,711 INFO L175 Difference]: Start difference. First operand has 89 places, 115 transitions, 1033 flow. Second operand 6 states and 100 transitions. [2024-06-27 20:15:17,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 128 transitions, 1333 flow [2024-06-27 20:15:17,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 128 transitions, 1150 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 20:15:17,737 INFO L231 Difference]: Finished difference. Result has 88 places, 118 transitions, 910 flow [2024-06-27 20:15:17,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=850, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=910, PETRI_PLACES=88, PETRI_TRANSITIONS=118} [2024-06-27 20:15:17,738 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 46 predicate places. [2024-06-27 20:15:17,738 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 118 transitions, 910 flow [2024-06-27 20:15:17,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:17,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:17,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:17,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:15:17,739 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)] === [2024-06-27 20:15:17,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:17,739 INFO L85 PathProgramCache]: Analyzing trace with hash -699459325, now seen corresponding path program 1 times [2024-06-27 20:15:17,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:17,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729306187] [2024-06-27 20:15:17,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:17,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:17,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:18,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:18,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:18,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729306187] [2024-06-27 20:15:18,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729306187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:18,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:18,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:15:18,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206830861] [2024-06-27 20:15:18,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:18,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:15:18,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:18,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:15:18,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:15:18,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:15:18,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 118 transitions, 910 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:18,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:18,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:15:18,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:18,800 INFO L124 PetriNetUnfolderBase]: 1882/2862 cut-off events. [2024-06-27 20:15:18,800 INFO L125 PetriNetUnfolderBase]: For 34965/34969 co-relation queries the response was YES. [2024-06-27 20:15:18,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13978 conditions, 2862 events. 1882/2862 cut-off events. For 34965/34969 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 13932 event pairs, 444 based on Foata normal form. 6/2867 useless extension candidates. Maximal degree in co-relation 13939. Up to 2541 conditions per place. [2024-06-27 20:15:18,812 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 112 selfloop transitions, 32 changer transitions 0/148 dead transitions. [2024-06-27 20:15:18,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 148 transitions, 1384 flow [2024-06-27 20:15:18,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:15:18,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:15:18,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 20:15:18,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355400696864111 [2024-06-27 20:15:18,814 INFO L175 Difference]: Start difference. First operand has 88 places, 118 transitions, 910 flow. Second operand 7 states and 125 transitions. [2024-06-27 20:15:18,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 148 transitions, 1384 flow [2024-06-27 20:15:18,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 148 transitions, 1346 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 20:15:18,838 INFO L231 Difference]: Finished difference. Result has 91 places, 122 transitions, 991 flow [2024-06-27 20:15:18,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=872, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=991, PETRI_PLACES=91, PETRI_TRANSITIONS=122} [2024-06-27 20:15:18,839 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2024-06-27 20:15:18,839 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 122 transitions, 991 flow [2024-06-27 20:15:18,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:18,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:18,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:18,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:15:18,840 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)] === [2024-06-27 20:15:18,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:18,840 INFO L85 PathProgramCache]: Analyzing trace with hash -585779845, now seen corresponding path program 2 times [2024-06-27 20:15:18,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:18,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51773111] [2024-06-27 20:15:18,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:18,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:18,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:19,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:19,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:19,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51773111] [2024-06-27 20:15:19,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51773111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:19,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:19,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:15:19,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176089476] [2024-06-27 20:15:19,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:19,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:15:19,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:19,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:15:19,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:15:19,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:15:19,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 122 transitions, 991 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:19,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:19,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:15:19,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:20,037 INFO L124 PetriNetUnfolderBase]: 1874/2849 cut-off events. [2024-06-27 20:15:20,038 INFO L125 PetriNetUnfolderBase]: For 38411/38415 co-relation queries the response was YES. [2024-06-27 20:15:20,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14302 conditions, 2849 events. 1874/2849 cut-off events. For 38411/38415 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 13877 event pairs, 582 based on Foata normal form. 6/2854 useless extension candidates. Maximal degree in co-relation 14262. Up to 2617 conditions per place. [2024-06-27 20:15:20,053 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 109 selfloop transitions, 33 changer transitions 0/146 dead transitions. [2024-06-27 20:15:20,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 146 transitions, 1353 flow [2024-06-27 20:15:20,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:15:20,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:15:20,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 20:15:20,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:15:20,055 INFO L175 Difference]: Start difference. First operand has 91 places, 122 transitions, 991 flow. Second operand 7 states and 123 transitions. [2024-06-27 20:15:20,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 146 transitions, 1353 flow [2024-06-27 20:15:20,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 146 transitions, 1293 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-27 20:15:20,083 INFO L231 Difference]: Finished difference. Result has 95 places, 122 transitions, 1006 flow [2024-06-27 20:15:20,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=931, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1006, PETRI_PLACES=95, PETRI_TRANSITIONS=122} [2024-06-27 20:15:20,084 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2024-06-27 20:15:20,084 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 122 transitions, 1006 flow [2024-06-27 20:15:20,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:20,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:20,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:20,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:15:20,085 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)] === [2024-06-27 20:15:20,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:20,085 INFO L85 PathProgramCache]: Analyzing trace with hash -581126497, now seen corresponding path program 1 times [2024-06-27 20:15:20,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:20,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865341690] [2024-06-27 20:15:20,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:20,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:20,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:20,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:20,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:20,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865341690] [2024-06-27 20:15:20,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865341690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:20,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:20,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:15:20,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334065991] [2024-06-27 20:15:20,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:20,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:15:20,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:20,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:15:20,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:15:20,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:15:20,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 122 transitions, 1006 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:20,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:20,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:15:20,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:21,480 INFO L124 PetriNetUnfolderBase]: 1966/2998 cut-off events. [2024-06-27 20:15:21,481 INFO L125 PetriNetUnfolderBase]: For 46454/46456 co-relation queries the response was YES. [2024-06-27 20:15:21,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15200 conditions, 2998 events. 1966/2998 cut-off events. For 46454/46456 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14836 event pairs, 520 based on Foata normal form. 24/3020 useless extension candidates. Maximal degree in co-relation 15158. Up to 2317 conditions per place. [2024-06-27 20:15:21,498 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 85 selfloop transitions, 70 changer transitions 0/159 dead transitions. [2024-06-27 20:15:21,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 159 transitions, 1454 flow [2024-06-27 20:15:21,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:15:21,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:15:21,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 20:15:21,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-27 20:15:21,500 INFO L175 Difference]: Start difference. First operand has 95 places, 122 transitions, 1006 flow. Second operand 8 states and 148 transitions. [2024-06-27 20:15:21,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 159 transitions, 1454 flow [2024-06-27 20:15:21,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 159 transitions, 1379 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 20:15:21,532 INFO L231 Difference]: Finished difference. Result has 97 places, 124 transitions, 1113 flow [2024-06-27 20:15:21,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=931, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1113, PETRI_PLACES=97, PETRI_TRANSITIONS=124} [2024-06-27 20:15:21,533 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 55 predicate places. [2024-06-27 20:15:21,533 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 124 transitions, 1113 flow [2024-06-27 20:15:21,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:21,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:21,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:21,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 20:15:21,534 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:15:21,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:21,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1281079675, now seen corresponding path program 1 times [2024-06-27 20:15:21,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:21,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140846437] [2024-06-27 20:15:21,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:21,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:21,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:21,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:21,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:21,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140846437] [2024-06-27 20:15:21,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140846437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:21,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:21,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:15:21,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676001025] [2024-06-27 20:15:21,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:21,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:15:21,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:21,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:15:21,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:15:22,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:15:22,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 124 transitions, 1113 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:22,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:22,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:15:22,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:22,427 INFO L124 PetriNetUnfolderBase]: 1971/3017 cut-off events. [2024-06-27 20:15:22,428 INFO L125 PetriNetUnfolderBase]: For 47637/47643 co-relation queries the response was YES. [2024-06-27 20:15:22,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15861 conditions, 3017 events. 1971/3017 cut-off events. For 47637/47643 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14986 event pairs, 611 based on Foata normal form. 7/3023 useless extension candidates. Maximal degree in co-relation 15818. Up to 2912 conditions per place. [2024-06-27 20:15:22,449 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 126 selfloop transitions, 13 changer transitions 0/143 dead transitions. [2024-06-27 20:15:22,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 143 transitions, 1473 flow [2024-06-27 20:15:22,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:15:22,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:15:22,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-27 20:15:22,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-27 20:15:22,488 INFO L175 Difference]: Start difference. First operand has 97 places, 124 transitions, 1113 flow. Second operand 6 states and 100 transitions. [2024-06-27 20:15:22,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 143 transitions, 1473 flow [2024-06-27 20:15:22,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 143 transitions, 1325 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 20:15:22,523 INFO L231 Difference]: Finished difference. Result has 97 places, 127 transitions, 1032 flow [2024-06-27 20:15:22,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=965, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1032, PETRI_PLACES=97, PETRI_TRANSITIONS=127} [2024-06-27 20:15:22,524 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 55 predicate places. [2024-06-27 20:15:22,524 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 127 transitions, 1032 flow [2024-06-27 20:15:22,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:22,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:22,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:22,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 20:15:22,525 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)] === [2024-06-27 20:15:22,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:22,525 INFO L85 PathProgramCache]: Analyzing trace with hash 518912411, now seen corresponding path program 2 times [2024-06-27 20:15:22,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:22,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241971993] [2024-06-27 20:15:22,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:22,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:22,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:23,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:23,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:23,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241971993] [2024-06-27 20:15:23,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241971993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:23,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:23,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:15:23,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639037320] [2024-06-27 20:15:23,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:23,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:15:23,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:23,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:15:23,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:15:23,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:15:23,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 127 transitions, 1032 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:23,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:23,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:15:23,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:23,844 INFO L124 PetriNetUnfolderBase]: 1988/3016 cut-off events. [2024-06-27 20:15:23,844 INFO L125 PetriNetUnfolderBase]: For 51204/51210 co-relation queries the response was YES. [2024-06-27 20:15:23,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15976 conditions, 3016 events. 1988/3016 cut-off events. For 51204/51210 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14834 event pairs, 535 based on Foata normal form. 5/3011 useless extension candidates. Maximal degree in co-relation 15932. Up to 2500 conditions per place. [2024-06-27 20:15:23,863 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 80 selfloop transitions, 74 changer transitions 0/158 dead transitions. [2024-06-27 20:15:23,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 158 transitions, 1464 flow [2024-06-27 20:15:23,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:15:23,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:15:23,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 20:15:23,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-27 20:15:23,865 INFO L175 Difference]: Start difference. First operand has 97 places, 127 transitions, 1032 flow. Second operand 8 states and 142 transitions. [2024-06-27 20:15:23,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 158 transitions, 1464 flow [2024-06-27 20:15:23,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 158 transitions, 1421 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 20:15:23,897 INFO L231 Difference]: Finished difference. Result has 101 places, 129 transitions, 1181 flow [2024-06-27 20:15:23,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1181, PETRI_PLACES=101, PETRI_TRANSITIONS=129} [2024-06-27 20:15:23,898 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-06-27 20:15:23,898 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 129 transitions, 1181 flow [2024-06-27 20:15:23,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:23,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:23,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:23,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 20:15:23,899 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)] === [2024-06-27 20:15:23,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:23,899 INFO L85 PathProgramCache]: Analyzing trace with hash 527483291, now seen corresponding path program 3 times [2024-06-27 20:15:23,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:23,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456337603] [2024-06-27 20:15:23,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:23,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:23,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:24,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:24,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:24,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456337603] [2024-06-27 20:15:24,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456337603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:24,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:24,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:15:24,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728743922] [2024-06-27 20:15:24,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:24,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:15:24,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:24,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:15:24,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:15:24,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:15:24,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 129 transitions, 1181 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:24,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:24,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:15:24,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:25,240 INFO L124 PetriNetUnfolderBase]: 2005/3043 cut-off events. [2024-06-27 20:15:25,240 INFO L125 PetriNetUnfolderBase]: For 57392/57398 co-relation queries the response was YES. [2024-06-27 20:15:25,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16903 conditions, 3043 events. 2005/3043 cut-off events. For 57392/57398 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 15017 event pairs, 484 based on Foata normal form. 5/3038 useless extension candidates. Maximal degree in co-relation 16858. Up to 2289 conditions per place. [2024-06-27 20:15:25,260 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 83 selfloop transitions, 81 changer transitions 0/168 dead transitions. [2024-06-27 20:15:25,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 168 transitions, 1773 flow [2024-06-27 20:15:25,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:15:25,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:15:25,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 20:15:25,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-27 20:15:25,261 INFO L175 Difference]: Start difference. First operand has 101 places, 129 transitions, 1181 flow. Second operand 8 states and 148 transitions. [2024-06-27 20:15:25,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 168 transitions, 1773 flow [2024-06-27 20:15:25,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 168 transitions, 1601 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 20:15:25,356 INFO L231 Difference]: Finished difference. Result has 103 places, 133 transitions, 1254 flow [2024-06-27 20:15:25,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1009, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1254, PETRI_PLACES=103, PETRI_TRANSITIONS=133} [2024-06-27 20:15:25,356 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 61 predicate places. [2024-06-27 20:15:25,356 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 133 transitions, 1254 flow [2024-06-27 20:15:25,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:25,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:25,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:25,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 20:15:25,357 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)] === [2024-06-27 20:15:25,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:25,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1475064887, now seen corresponding path program 4 times [2024-06-27 20:15:25,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:25,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288156272] [2024-06-27 20:15:25,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:25,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:25,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:26,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:26,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:26,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288156272] [2024-06-27 20:15:26,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288156272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:26,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:26,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:15:26,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499485077] [2024-06-27 20:15:26,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:26,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:15:26,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:26,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:15:26,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:15:26,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:15:26,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 133 transitions, 1254 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:26,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:26,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:15:26,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:26,788 INFO L124 PetriNetUnfolderBase]: 1997/3035 cut-off events. [2024-06-27 20:15:26,788 INFO L125 PetriNetUnfolderBase]: For 61684/61690 co-relation queries the response was YES. [2024-06-27 20:15:26,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17094 conditions, 3035 events. 1997/3035 cut-off events. For 61684/61690 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14893 event pairs, 545 based on Foata normal form. 5/3030 useless extension candidates. Maximal degree in co-relation 17048. Up to 2515 conditions per place. [2024-06-27 20:15:26,808 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 86 selfloop transitions, 72 changer transitions 0/162 dead transitions. [2024-06-27 20:15:26,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 162 transitions, 1660 flow [2024-06-27 20:15:26,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:15:26,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:15:26,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 20:15:26,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-27 20:15:26,809 INFO L175 Difference]: Start difference. First operand has 103 places, 133 transitions, 1254 flow. Second operand 8 states and 143 transitions. [2024-06-27 20:15:26,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 162 transitions, 1660 flow [2024-06-27 20:15:26,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 162 transitions, 1468 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 20:15:26,867 INFO L231 Difference]: Finished difference. Result has 106 places, 133 transitions, 1214 flow [2024-06-27 20:15:26,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1062, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1214, PETRI_PLACES=106, PETRI_TRANSITIONS=133} [2024-06-27 20:15:26,867 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 64 predicate places. [2024-06-27 20:15:26,867 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 133 transitions, 1214 flow [2024-06-27 20:15:26,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:26,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:26,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:26,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 20:15:26,868 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:15:26,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:26,868 INFO L85 PathProgramCache]: Analyzing trace with hash 921292435, now seen corresponding path program 2 times [2024-06-27 20:15:26,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:26,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607391558] [2024-06-27 20:15:26,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:26,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:26,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:27,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:27,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:27,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607391558] [2024-06-27 20:15:27,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607391558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:27,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:27,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:15:27,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636531522] [2024-06-27 20:15:27,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:27,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:15:27,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:27,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:15:27,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:15:27,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:15:27,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 133 transitions, 1214 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:27,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:27,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:15:27,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:27,812 INFO L124 PetriNetUnfolderBase]: 1994/3060 cut-off events. [2024-06-27 20:15:27,812 INFO L125 PetriNetUnfolderBase]: For 64110/64122 co-relation queries the response was YES. [2024-06-27 20:15:27,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17021 conditions, 3060 events. 1994/3060 cut-off events. For 64110/64122 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15237 event pairs, 609 based on Foata normal form. 13/3072 useless extension candidates. Maximal degree in co-relation 16974. Up to 2944 conditions per place. [2024-06-27 20:15:27,832 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 125 selfloop transitions, 18 changer transitions 0/147 dead transitions. [2024-06-27 20:15:27,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 147 transitions, 1574 flow [2024-06-27 20:15:27,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:15:27,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:15:27,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-27 20:15:27,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-27 20:15:27,834 INFO L175 Difference]: Start difference. First operand has 106 places, 133 transitions, 1214 flow. Second operand 6 states and 96 transitions. [2024-06-27 20:15:27,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 147 transitions, 1574 flow [2024-06-27 20:15:27,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 147 transitions, 1399 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 20:15:27,881 INFO L231 Difference]: Finished difference. Result has 105 places, 136 transitions, 1123 flow [2024-06-27 20:15:27,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1039, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1123, PETRI_PLACES=105, PETRI_TRANSITIONS=136} [2024-06-27 20:15:27,882 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-27 20:15:27,882 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 136 transitions, 1123 flow [2024-06-27 20:15:27,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:27,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:27,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:27,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 20:15:27,882 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)] === [2024-06-27 20:15:27,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:27,883 INFO L85 PathProgramCache]: Analyzing trace with hash 915584467, now seen corresponding path program 1 times [2024-06-27 20:15:27,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:27,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306794457] [2024-06-27 20:15:27,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:27,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:27,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:28,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:28,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:28,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306794457] [2024-06-27 20:15:28,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306794457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:28,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:28,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:15:28,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76560879] [2024-06-27 20:15:28,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:28,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:15:28,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:28,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:15:28,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:15:28,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:15:28,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 136 transitions, 1123 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:28,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:28,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:15:28,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:28,744 INFO L124 PetriNetUnfolderBase]: 1795/2834 cut-off events. [2024-06-27 20:15:28,744 INFO L125 PetriNetUnfolderBase]: For 57394/57396 co-relation queries the response was YES. [2024-06-27 20:15:28,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15346 conditions, 2834 events. 1795/2834 cut-off events. For 57394/57396 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14525 event pairs, 559 based on Foata normal form. 1/2834 useless extension candidates. Maximal degree in co-relation 15298. Up to 2677 conditions per place. [2024-06-27 20:15:28,764 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 135 selfloop transitions, 11 changer transitions 0/151 dead transitions. [2024-06-27 20:15:28,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 151 transitions, 1481 flow [2024-06-27 20:15:28,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:15:28,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:15:28,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-27 20:15:28,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 20:15:28,766 INFO L175 Difference]: Start difference. First operand has 105 places, 136 transitions, 1123 flow. Second operand 6 states and 102 transitions. [2024-06-27 20:15:28,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 151 transitions, 1481 flow [2024-06-27 20:15:28,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 151 transitions, 1419 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 20:15:28,811 INFO L231 Difference]: Finished difference. Result has 107 places, 139 transitions, 1125 flow [2024-06-27 20:15:28,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1061, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1125, PETRI_PLACES=107, PETRI_TRANSITIONS=139} [2024-06-27 20:15:28,812 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-27 20:15:28,812 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 139 transitions, 1125 flow [2024-06-27 20:15:28,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:28,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:28,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:28,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 20:15:28,813 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)] === [2024-06-27 20:15:28,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:28,813 INFO L85 PathProgramCache]: Analyzing trace with hash 921298387, now seen corresponding path program 2 times [2024-06-27 20:15:28,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:28,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655910697] [2024-06-27 20:15:28,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:28,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:28,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:29,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:29,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:29,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655910697] [2024-06-27 20:15:29,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655910697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:29,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:29,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:15:29,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927253659] [2024-06-27 20:15:29,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:29,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:15:29,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:29,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:15:29,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:15:29,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:15:29,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 139 transitions, 1125 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:29,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:29,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:15:29,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:29,735 INFO L124 PetriNetUnfolderBase]: 1792/2831 cut-off events. [2024-06-27 20:15:29,736 INFO L125 PetriNetUnfolderBase]: For 60795/60799 co-relation queries the response was YES. [2024-06-27 20:15:29,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15653 conditions, 2831 events. 1792/2831 cut-off events. For 60795/60799 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14517 event pairs, 563 based on Foata normal form. 3/2833 useless extension candidates. Maximal degree in co-relation 15604. Up to 2667 conditions per place. [2024-06-27 20:15:29,754 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 130 selfloop transitions, 16 changer transitions 0/151 dead transitions. [2024-06-27 20:15:29,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 151 transitions, 1479 flow [2024-06-27 20:15:29,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:15:29,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:15:29,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-27 20:15:29,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105691056910569 [2024-06-27 20:15:29,756 INFO L175 Difference]: Start difference. First operand has 107 places, 139 transitions, 1125 flow. Second operand 6 states and 101 transitions. [2024-06-27 20:15:29,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 151 transitions, 1479 flow [2024-06-27 20:15:29,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 151 transitions, 1437 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 20:15:29,809 INFO L231 Difference]: Finished difference. Result has 109 places, 142 transitions, 1163 flow [2024-06-27 20:15:29,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1083, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1163, PETRI_PLACES=109, PETRI_TRANSITIONS=142} [2024-06-27 20:15:29,810 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2024-06-27 20:15:29,810 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 142 transitions, 1163 flow [2024-06-27 20:15:29,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:29,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:29,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:29,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 20:15:29,811 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:15:29,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:29,811 INFO L85 PathProgramCache]: Analyzing trace with hash -208401263, now seen corresponding path program 1 times [2024-06-27 20:15:29,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:29,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540235325] [2024-06-27 20:15:29,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:29,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:29,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:30,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:30,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:30,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540235325] [2024-06-27 20:15:30,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540235325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:30,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:30,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:15:30,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23670499] [2024-06-27 20:15:30,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:30,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:15:30,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:30,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:15:30,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:15:30,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:15:30,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 142 transitions, 1163 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:30,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:30,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:15:30,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:31,032 INFO L124 PetriNetUnfolderBase]: 2115/3259 cut-off events. [2024-06-27 20:15:31,033 INFO L125 PetriNetUnfolderBase]: For 87464/87466 co-relation queries the response was YES. [2024-06-27 20:15:31,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18975 conditions, 3259 events. 2115/3259 cut-off events. For 87464/87466 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16484 event pairs, 402 based on Foata normal form. 16/3273 useless extension candidates. Maximal degree in co-relation 18925. Up to 2039 conditions per place. [2024-06-27 20:15:31,050 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 111 selfloop transitions, 68 changer transitions 0/183 dead transitions. [2024-06-27 20:15:31,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 183 transitions, 1781 flow [2024-06-27 20:15:31,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:15:31,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:15:31,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:15:31,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-27 20:15:31,051 INFO L175 Difference]: Start difference. First operand has 109 places, 142 transitions, 1163 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:15:31,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 183 transitions, 1781 flow [2024-06-27 20:15:31,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 183 transitions, 1723 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 20:15:31,107 INFO L231 Difference]: Finished difference. Result has 113 places, 144 transitions, 1297 flow [2024-06-27 20:15:31,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1105, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1297, PETRI_PLACES=113, PETRI_TRANSITIONS=144} [2024-06-27 20:15:31,108 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-27 20:15:31,108 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 144 transitions, 1297 flow [2024-06-27 20:15:31,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:31,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:31,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:31,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 20:15:31,109 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:15:31,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:31,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1558641613, now seen corresponding path program 2 times [2024-06-27 20:15:31,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:31,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204506871] [2024-06-27 20:15:31,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:31,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:31,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:31,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:31,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:31,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204506871] [2024-06-27 20:15:31,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204506871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:31,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:31,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:15:31,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095730838] [2024-06-27 20:15:31,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:31,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:15:31,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:31,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:15:31,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:15:31,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:15:31,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 144 transitions, 1297 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:31,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:31,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:15:31,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:32,329 INFO L124 PetriNetUnfolderBase]: 2173/3359 cut-off events. [2024-06-27 20:15:32,329 INFO L125 PetriNetUnfolderBase]: For 95000/95002 co-relation queries the response was YES. [2024-06-27 20:15:32,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20013 conditions, 3359 events. 2173/3359 cut-off events. For 95000/95002 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 17200 event pairs, 574 based on Foata normal form. 16/3373 useless extension candidates. Maximal degree in co-relation 19962. Up to 2546 conditions per place. [2024-06-27 20:15:32,350 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 108 selfloop transitions, 71 changer transitions 0/183 dead transitions. [2024-06-27 20:15:32,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 183 transitions, 1799 flow [2024-06-27 20:15:32,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:15:32,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:15:32,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:15:32,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-27 20:15:32,354 INFO L175 Difference]: Start difference. First operand has 113 places, 144 transitions, 1297 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:15:32,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 183 transitions, 1799 flow [2024-06-27 20:15:32,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 183 transitions, 1716 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 20:15:32,412 INFO L231 Difference]: Finished difference. Result has 117 places, 145 transitions, 1390 flow [2024-06-27 20:15:32,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1214, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1390, PETRI_PLACES=117, PETRI_TRANSITIONS=145} [2024-06-27 20:15:32,421 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 75 predicate places. [2024-06-27 20:15:32,422 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 145 transitions, 1390 flow [2024-06-27 20:15:32,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:32,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:32,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:32,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 20:15:32,422 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)] === [2024-06-27 20:15:32,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:32,423 INFO L85 PathProgramCache]: Analyzing trace with hash 589477125, now seen corresponding path program 1 times [2024-06-27 20:15:32,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:32,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778758613] [2024-06-27 20:15:32,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:32,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:32,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:32,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:32,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:32,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778758613] [2024-06-27 20:15:32,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778758613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:32,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:32,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:15:32,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434148568] [2024-06-27 20:15:32,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:32,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:15:32,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:32,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:15:32,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:15:33,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:15:33,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 145 transitions, 1390 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:33,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:33,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:15:33,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:33,461 INFO L124 PetriNetUnfolderBase]: 2183/3381 cut-off events. [2024-06-27 20:15:33,462 INFO L125 PetriNetUnfolderBase]: For 97160/97168 co-relation queries the response was YES. [2024-06-27 20:15:33,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20620 conditions, 3381 events. 2183/3381 cut-off events. For 97160/97168 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 17457 event pairs, 650 based on Foata normal form. 10/3390 useless extension candidates. Maximal degree in co-relation 20567. Up to 3146 conditions per place. [2024-06-27 20:15:33,484 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 133 selfloop transitions, 35 changer transitions 0/172 dead transitions. [2024-06-27 20:15:33,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 172 transitions, 1852 flow [2024-06-27 20:15:33,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:15:33,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:15:33,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 20:15:33,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:15:33,485 INFO L175 Difference]: Start difference. First operand has 117 places, 145 transitions, 1390 flow. Second operand 7 states and 123 transitions. [2024-06-27 20:15:33,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 172 transitions, 1852 flow [2024-06-27 20:15:33,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 172 transitions, 1694 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 20:15:33,569 INFO L231 Difference]: Finished difference. Result has 118 places, 149 transitions, 1366 flow [2024-06-27 20:15:33,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1232, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1366, PETRI_PLACES=118, PETRI_TRANSITIONS=149} [2024-06-27 20:15:33,569 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 76 predicate places. [2024-06-27 20:15:33,571 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 149 transitions, 1366 flow [2024-06-27 20:15:33,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:33,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:33,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:33,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 20:15:33,571 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:15:33,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:33,572 INFO L85 PathProgramCache]: Analyzing trace with hash -840776529, now seen corresponding path program 3 times [2024-06-27 20:15:33,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:33,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264487331] [2024-06-27 20:15:33,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:33,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:33,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:34,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:34,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:34,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264487331] [2024-06-27 20:15:34,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264487331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:34,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:34,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:15:34,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758185517] [2024-06-27 20:15:34,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:34,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:15:34,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:34,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:15:34,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:15:34,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:15:34,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 149 transitions, 1366 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:34,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:34,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:15:34,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:34,916 INFO L124 PetriNetUnfolderBase]: 2302/3599 cut-off events. [2024-06-27 20:15:34,916 INFO L125 PetriNetUnfolderBase]: For 112995/113001 co-relation queries the response was YES. [2024-06-27 20:15:34,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22109 conditions, 3599 events. 2302/3599 cut-off events. For 112995/113001 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 19052 event pairs, 474 based on Foata normal form. 22/3619 useless extension candidates. Maximal degree in co-relation 22055. Up to 2663 conditions per place. [2024-06-27 20:15:34,941 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 117 selfloop transitions, 73 changer transitions 0/194 dead transitions. [2024-06-27 20:15:34,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 194 transitions, 2044 flow [2024-06-27 20:15:34,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:15:34,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:15:34,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 20:15:34,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-27 20:15:34,942 INFO L175 Difference]: Start difference. First operand has 118 places, 149 transitions, 1366 flow. Second operand 8 states and 156 transitions. [2024-06-27 20:15:34,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 194 transitions, 2044 flow [2024-06-27 20:15:35,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 194 transitions, 1940 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 20:15:35,034 INFO L231 Difference]: Finished difference. Result has 121 places, 151 transitions, 1472 flow [2024-06-27 20:15:35,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1262, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1472, PETRI_PLACES=121, PETRI_TRANSITIONS=151} [2024-06-27 20:15:35,034 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2024-06-27 20:15:35,034 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 151 transitions, 1472 flow [2024-06-27 20:15:35,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:35,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:35,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:35,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 20:15:35,035 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:15:35,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:35,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1317236613, now seen corresponding path program 4 times [2024-06-27 20:15:35,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:35,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586564363] [2024-06-27 20:15:35,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:35,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:35,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:35,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:35,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:35,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586564363] [2024-06-27 20:15:35,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586564363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:35,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:35,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:15:35,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802079004] [2024-06-27 20:15:35,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:35,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:15:35,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:35,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:15:35,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:15:35,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:15:35,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 151 transitions, 1472 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:35,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:35,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:15:35,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:36,331 INFO L124 PetriNetUnfolderBase]: 2377/3724 cut-off events. [2024-06-27 20:15:36,332 INFO L125 PetriNetUnfolderBase]: For 124437/124443 co-relation queries the response was YES. [2024-06-27 20:15:36,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23232 conditions, 3724 events. 2377/3724 cut-off events. For 124437/124443 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 19942 event pairs, 637 based on Foata normal form. 26/3748 useless extension candidates. Maximal degree in co-relation 23177. Up to 3039 conditions per place. [2024-06-27 20:15:36,358 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 117 selfloop transitions, 70 changer transitions 0/191 dead transitions. [2024-06-27 20:15:36,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 191 transitions, 2004 flow [2024-06-27 20:15:36,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:15:36,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:15:36,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:15:36,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-27 20:15:36,359 INFO L175 Difference]: Start difference. First operand has 121 places, 151 transitions, 1472 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:15:36,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 191 transitions, 2004 flow [2024-06-27 20:15:36,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 191 transitions, 1898 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 20:15:36,446 INFO L231 Difference]: Finished difference. Result has 125 places, 152 transitions, 1547 flow [2024-06-27 20:15:36,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1368, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1547, PETRI_PLACES=125, PETRI_TRANSITIONS=152} [2024-06-27 20:15:36,446 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-27 20:15:36,447 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 152 transitions, 1547 flow [2024-06-27 20:15:36,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:36,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:36,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:36,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 20:15:36,447 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:15:36,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:36,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1322598993, now seen corresponding path program 5 times [2024-06-27 20:15:36,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:36,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088936830] [2024-06-27 20:15:36,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:36,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:36,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:37,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:37,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:37,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088936830] [2024-06-27 20:15:37,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088936830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:37,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:37,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:15:37,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877570835] [2024-06-27 20:15:37,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:37,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:15:37,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:37,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:15:37,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:15:37,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:15:37,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 152 transitions, 1547 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:37,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:37,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:15:37,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:37,843 INFO L124 PetriNetUnfolderBase]: 2452/3841 cut-off events. [2024-06-27 20:15:37,843 INFO L125 PetriNetUnfolderBase]: For 132096/132098 co-relation queries the response was YES. [2024-06-27 20:15:37,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24218 conditions, 3841 events. 2452/3841 cut-off events. For 132096/132098 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 20858 event pairs, 633 based on Foata normal form. 20/3859 useless extension candidates. Maximal degree in co-relation 24161. Up to 3164 conditions per place. [2024-06-27 20:15:37,870 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 119 selfloop transitions, 66 changer transitions 0/189 dead transitions. [2024-06-27 20:15:37,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 189 transitions, 2063 flow [2024-06-27 20:15:37,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:15:37,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:15:37,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 20:15:37,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-27 20:15:37,872 INFO L175 Difference]: Start difference. First operand has 125 places, 152 transitions, 1547 flow. Second operand 8 states and 147 transitions. [2024-06-27 20:15:37,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 189 transitions, 2063 flow [2024-06-27 20:15:37,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 189 transitions, 1912 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 20:15:37,964 INFO L231 Difference]: Finished difference. Result has 127 places, 153 transitions, 1569 flow [2024-06-27 20:15:37,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1396, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1569, PETRI_PLACES=127, PETRI_TRANSITIONS=153} [2024-06-27 20:15:37,965 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2024-06-27 20:15:37,965 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 153 transitions, 1569 flow [2024-06-27 20:15:37,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:37,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:37,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:37,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 20:15:37,966 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:15:37,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:37,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1032829261, now seen corresponding path program 1 times [2024-06-27 20:15:37,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:37,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229252293] [2024-06-27 20:15:37,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:37,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:37,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:38,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:38,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:38,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229252293] [2024-06-27 20:15:38,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229252293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:38,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:38,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:15:38,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264293816] [2024-06-27 20:15:38,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:38,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:15:38,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:38,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:15:38,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:15:38,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:15:38,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 153 transitions, 1569 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:38,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:38,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:15:38,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:39,409 INFO L124 PetriNetUnfolderBase]: 2493/3914 cut-off events. [2024-06-27 20:15:39,410 INFO L125 PetriNetUnfolderBase]: For 136365/136367 co-relation queries the response was YES. [2024-06-27 20:15:39,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24690 conditions, 3914 events. 2493/3914 cut-off events. For 136365/136367 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 21381 event pairs, 639 based on Foata normal form. 12/3924 useless extension candidates. Maximal degree in co-relation 24632. Up to 2830 conditions per place. [2024-06-27 20:15:39,440 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 118 selfloop transitions, 69 changer transitions 0/191 dead transitions. [2024-06-27 20:15:39,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 191 transitions, 2093 flow [2024-06-27 20:15:39,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:15:39,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:15:39,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 20:15:39,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-27 20:15:39,442 INFO L175 Difference]: Start difference. First operand has 127 places, 153 transitions, 1569 flow. Second operand 8 states and 148 transitions. [2024-06-27 20:15:39,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 191 transitions, 2093 flow [2024-06-27 20:15:39,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 191 transitions, 1948 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 20:15:39,593 INFO L231 Difference]: Finished difference. Result has 129 places, 154 transitions, 1601 flow [2024-06-27 20:15:39,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1424, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1601, PETRI_PLACES=129, PETRI_TRANSITIONS=154} [2024-06-27 20:15:39,593 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 87 predicate places. [2024-06-27 20:15:39,593 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 154 transitions, 1601 flow [2024-06-27 20:15:39,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:39,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:39,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:39,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 20:15:39,594 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)] === [2024-06-27 20:15:39,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:39,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1858967541, now seen corresponding path program 2 times [2024-06-27 20:15:39,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:39,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838320488] [2024-06-27 20:15:39,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:39,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:39,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:40,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:40,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:40,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838320488] [2024-06-27 20:15:40,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838320488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:40,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:40,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:15:40,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942627910] [2024-06-27 20:15:40,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:40,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:15:40,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:40,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:15:40,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:15:40,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:15:40,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 154 transitions, 1601 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:40,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:40,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:15:40,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:40,749 INFO L124 PetriNetUnfolderBase]: 2521/3963 cut-off events. [2024-06-27 20:15:40,749 INFO L125 PetriNetUnfolderBase]: For 139131/139135 co-relation queries the response was YES. [2024-06-27 20:15:40,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25166 conditions, 3963 events. 2521/3963 cut-off events. For 139131/139135 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 21844 event pairs, 763 based on Foata normal form. 4/3966 useless extension candidates. Maximal degree in co-relation 25107. Up to 3669 conditions per place. [2024-06-27 20:15:40,780 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 137 selfloop transitions, 38 changer transitions 0/179 dead transitions. [2024-06-27 20:15:40,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 179 transitions, 2179 flow [2024-06-27 20:15:40,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:15:40,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:15:40,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 20:15:40,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 20:15:40,782 INFO L175 Difference]: Start difference. First operand has 129 places, 154 transitions, 1601 flow. Second operand 7 states and 119 transitions. [2024-06-27 20:15:40,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 179 transitions, 2179 flow [2024-06-27 20:15:40,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 179 transitions, 2022 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 20:15:40,892 INFO L231 Difference]: Finished difference. Result has 131 places, 162 transitions, 1665 flow [2024-06-27 20:15:40,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1444, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1665, PETRI_PLACES=131, PETRI_TRANSITIONS=162} [2024-06-27 20:15:40,893 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 89 predicate places. [2024-06-27 20:15:40,893 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 162 transitions, 1665 flow [2024-06-27 20:15:40,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:40,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:40,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:40,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 20:15:40,893 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)] === [2024-06-27 20:15:40,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:40,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1858967169, now seen corresponding path program 1 times [2024-06-27 20:15:40,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:40,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116082400] [2024-06-27 20:15:40,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:40,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:40,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:41,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:41,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:41,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116082400] [2024-06-27 20:15:41,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116082400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:41,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:41,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:15:41,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872999877] [2024-06-27 20:15:41,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:41,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:15:41,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:41,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:15:41,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:15:41,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:15:41,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 162 transitions, 1665 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:41,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:41,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:15:41,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:42,202 INFO L124 PetriNetUnfolderBase]: 2526/3978 cut-off events. [2024-06-27 20:15:42,202 INFO L125 PetriNetUnfolderBase]: For 146321/146327 co-relation queries the response was YES. [2024-06-27 20:15:42,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25614 conditions, 3978 events. 2526/3978 cut-off events. For 146321/146327 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 21930 event pairs, 777 based on Foata normal form. 7/3984 useless extension candidates. Maximal degree in co-relation 25553. Up to 3831 conditions per place. [2024-06-27 20:15:42,227 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 162 selfloop transitions, 16 changer transitions 0/182 dead transitions. [2024-06-27 20:15:42,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 182 transitions, 2119 flow [2024-06-27 20:15:42,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:15:42,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:15:42,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-27 20:15:42,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-27 20:15:42,229 INFO L175 Difference]: Start difference. First operand has 131 places, 162 transitions, 1665 flow. Second operand 7 states and 112 transitions. [2024-06-27 20:15:42,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 182 transitions, 2119 flow [2024-06-27 20:15:42,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 182 transitions, 2033 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-27 20:15:42,356 INFO L231 Difference]: Finished difference. Result has 135 places, 165 transitions, 1665 flow [2024-06-27 20:15:42,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1579, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1665, PETRI_PLACES=135, PETRI_TRANSITIONS=165} [2024-06-27 20:15:42,357 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2024-06-27 20:15:42,357 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 165 transitions, 1665 flow [2024-06-27 20:15:42,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:42,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:42,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:42,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 20:15:42,358 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:15:42,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:42,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1093798499, now seen corresponding path program 6 times [2024-06-27 20:15:42,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:42,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170199108] [2024-06-27 20:15:42,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:42,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:42,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:42,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:42,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:42,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170199108] [2024-06-27 20:15:42,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170199108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:42,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:42,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:15:42,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847223052] [2024-06-27 20:15:42,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:42,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:15:42,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:42,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:15:42,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:15:43,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:15:43,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 165 transitions, 1665 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:43,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:43,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:15:43,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:43,827 INFO L124 PetriNetUnfolderBase]: 2490/3919 cut-off events. [2024-06-27 20:15:43,827 INFO L125 PetriNetUnfolderBase]: For 152098/152106 co-relation queries the response was YES. [2024-06-27 20:15:43,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25110 conditions, 3919 events. 2490/3919 cut-off events. For 152098/152106 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 21502 event pairs, 648 based on Foata normal form. 23/3940 useless extension candidates. Maximal degree in co-relation 25047. Up to 3231 conditions per place. [2024-06-27 20:15:43,853 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 130 selfloop transitions, 63 changer transitions 0/197 dead transitions. [2024-06-27 20:15:43,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 197 transitions, 2159 flow [2024-06-27 20:15:43,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:15:43,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:15:43,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 20:15:43,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-27 20:15:43,855 INFO L175 Difference]: Start difference. First operand has 135 places, 165 transitions, 1665 flow. Second operand 8 states and 142 transitions. [2024-06-27 20:15:43,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 197 transitions, 2159 flow [2024-06-27 20:15:43,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 197 transitions, 2083 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-27 20:15:43,996 INFO L231 Difference]: Finished difference. Result has 138 places, 165 transitions, 1724 flow [2024-06-27 20:15:43,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1589, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1724, PETRI_PLACES=138, PETRI_TRANSITIONS=165} [2024-06-27 20:15:43,997 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 96 predicate places. [2024-06-27 20:15:43,997 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 165 transitions, 1724 flow [2024-06-27 20:15:43,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:43,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:43,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:43,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 20:15:43,998 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:15:43,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:43,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1731996317, now seen corresponding path program 2 times [2024-06-27 20:15:43,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:43,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821237801] [2024-06-27 20:15:43,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:43,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:44,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:44,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:44,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:44,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821237801] [2024-06-27 20:15:44,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821237801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:44,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:44,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:15:44,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549993747] [2024-06-27 20:15:44,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:44,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:15:44,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:44,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:15:44,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:15:44,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:15:44,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 165 transitions, 1724 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:44,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:44,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:15:44,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:45,458 INFO L124 PetriNetUnfolderBase]: 2470/3883 cut-off events. [2024-06-27 20:15:45,458 INFO L125 PetriNetUnfolderBase]: For 148380/148388 co-relation queries the response was YES. [2024-06-27 20:15:45,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24947 conditions, 3883 events. 2470/3883 cut-off events. For 148380/148388 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 21206 event pairs, 625 based on Foata normal form. 15/3896 useless extension candidates. Maximal degree in co-relation 24883. Up to 3109 conditions per place. [2024-06-27 20:15:45,487 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 130 selfloop transitions, 65 changer transitions 0/199 dead transitions. [2024-06-27 20:15:45,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 199 transitions, 2232 flow [2024-06-27 20:15:45,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:15:45,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:15:45,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 20:15:45,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 20:15:45,489 INFO L175 Difference]: Start difference. First operand has 138 places, 165 transitions, 1724 flow. Second operand 8 states and 144 transitions. [2024-06-27 20:15:45,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 199 transitions, 2232 flow [2024-06-27 20:15:45,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 199 transitions, 2077 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 20:15:45,610 INFO L231 Difference]: Finished difference. Result has 139 places, 165 transitions, 1705 flow [2024-06-27 20:15:45,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1569, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1705, PETRI_PLACES=139, PETRI_TRANSITIONS=165} [2024-06-27 20:15:45,612 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 97 predicate places. [2024-06-27 20:15:45,612 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 165 transitions, 1705 flow [2024-06-27 20:15:45,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:45,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:45,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:45,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 20:15:45,612 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:15:45,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:45,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1732255787, now seen corresponding path program 3 times [2024-06-27 20:15:45,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:45,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568141558] [2024-06-27 20:15:45,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:45,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:45,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:46,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:46,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:46,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568141558] [2024-06-27 20:15:46,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568141558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:46,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:46,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:15:46,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162495533] [2024-06-27 20:15:46,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:46,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:15:46,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:46,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:15:46,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:15:46,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:15:46,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 165 transitions, 1705 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:46,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:46,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:15:46,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:47,055 INFO L124 PetriNetUnfolderBase]: 2450/3851 cut-off events. [2024-06-27 20:15:47,056 INFO L125 PetriNetUnfolderBase]: For 147611/147619 co-relation queries the response was YES. [2024-06-27 20:15:47,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24404 conditions, 3851 events. 2450/3851 cut-off events. For 147611/147619 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 21030 event pairs, 568 based on Foata normal form. 15/3864 useless extension candidates. Maximal degree in co-relation 24339. Up to 2427 conditions per place. [2024-06-27 20:15:47,091 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 121 selfloop transitions, 73 changer transitions 0/198 dead transitions. [2024-06-27 20:15:47,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 198 transitions, 2149 flow [2024-06-27 20:15:47,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:15:47,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:15:47,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 20:15:47,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-27 20:15:47,093 INFO L175 Difference]: Start difference. First operand has 139 places, 165 transitions, 1705 flow. Second operand 8 states and 142 transitions. [2024-06-27 20:15:47,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 198 transitions, 2149 flow [2024-06-27 20:15:47,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 198 transitions, 1917 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 20:15:47,208 INFO L231 Difference]: Finished difference. Result has 138 places, 164 transitions, 1563 flow [2024-06-27 20:15:47,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1413, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1563, PETRI_PLACES=138, PETRI_TRANSITIONS=164} [2024-06-27 20:15:47,209 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 96 predicate places. [2024-06-27 20:15:47,209 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 164 transitions, 1563 flow [2024-06-27 20:15:47,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:47,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:47,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:47,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 20:15:47,210 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)] === [2024-06-27 20:15:47,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:47,210 INFO L85 PathProgramCache]: Analyzing trace with hash 599952645, now seen corresponding path program 3 times [2024-06-27 20:15:47,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:47,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110058849] [2024-06-27 20:15:47,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:47,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:47,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:47,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:47,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:47,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110058849] [2024-06-27 20:15:47,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110058849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:47,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:47,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:15:47,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332260092] [2024-06-27 20:15:47,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:47,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:15:47,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:47,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:15:47,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:15:47,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:15:47,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 164 transitions, 1563 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:47,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:47,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:15:47,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:48,405 INFO L124 PetriNetUnfolderBase]: 2454/3858 cut-off events. [2024-06-27 20:15:48,405 INFO L125 PetriNetUnfolderBase]: For 146949/146957 co-relation queries the response was YES. [2024-06-27 20:15:48,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24131 conditions, 3858 events. 2454/3858 cut-off events. For 146949/146957 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 21106 event pairs, 733 based on Foata normal form. 5/3861 useless extension candidates. Maximal degree in co-relation 24066. Up to 3531 conditions per place. [2024-06-27 20:15:48,431 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 130 selfloop transitions, 51 changer transitions 0/185 dead transitions. [2024-06-27 20:15:48,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 185 transitions, 2247 flow [2024-06-27 20:15:48,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:15:48,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:15:48,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 20:15:48,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-27 20:15:48,433 INFO L175 Difference]: Start difference. First operand has 138 places, 164 transitions, 1563 flow. Second operand 7 states and 116 transitions. [2024-06-27 20:15:48,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 185 transitions, 2247 flow [2024-06-27 20:15:48,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 185 transitions, 2042 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 20:15:48,555 INFO L231 Difference]: Finished difference. Result has 139 places, 172 transitions, 1616 flow [2024-06-27 20:15:48,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1358, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1616, PETRI_PLACES=139, PETRI_TRANSITIONS=172} [2024-06-27 20:15:48,556 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 97 predicate places. [2024-06-27 20:15:48,556 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 172 transitions, 1616 flow [2024-06-27 20:15:48,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:48,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:48,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:48,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 20:15:48,557 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:15:48,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:48,557 INFO L85 PathProgramCache]: Analyzing trace with hash 599953017, now seen corresponding path program 2 times [2024-06-27 20:15:48,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:48,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553920353] [2024-06-27 20:15:48,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:48,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:48,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:49,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:49,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:49,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553920353] [2024-06-27 20:15:49,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553920353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:49,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:49,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:15:49,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282951409] [2024-06-27 20:15:49,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:49,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:15:49,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:49,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:15:49,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:15:49,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:15:49,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 172 transitions, 1616 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:49,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:49,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:15:49,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:49,938 INFO L124 PetriNetUnfolderBase]: 2459/3877 cut-off events. [2024-06-27 20:15:49,939 INFO L125 PetriNetUnfolderBase]: For 154638/154650 co-relation queries the response was YES. [2024-06-27 20:15:49,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24232 conditions, 3877 events. 2459/3877 cut-off events. For 154638/154650 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 21283 event pairs, 721 based on Foata normal form. 13/3889 useless extension candidates. Maximal degree in co-relation 24166. Up to 3718 conditions per place. [2024-06-27 20:15:49,965 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 162 selfloop transitions, 21 changer transitions 0/187 dead transitions. [2024-06-27 20:15:49,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 187 transitions, 2074 flow [2024-06-27 20:15:49,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:15:49,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:15:49,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-27 20:15:49,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37282229965156793 [2024-06-27 20:15:49,967 INFO L175 Difference]: Start difference. First operand has 139 places, 172 transitions, 1616 flow. Second operand 7 states and 107 transitions. [2024-06-27 20:15:49,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 187 transitions, 2074 flow [2024-06-27 20:15:50,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 187 transitions, 1916 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-27 20:15:50,085 INFO L231 Difference]: Finished difference. Result has 142 places, 175 transitions, 1564 flow [2024-06-27 20:15:50,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1458, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1564, PETRI_PLACES=142, PETRI_TRANSITIONS=175} [2024-06-27 20:15:50,086 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2024-06-27 20:15:50,087 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 175 transitions, 1564 flow [2024-06-27 20:15:50,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:50,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:50,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:50,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 20:15:50,087 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:15:50,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:50,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1071145879, now seen corresponding path program 3 times [2024-06-27 20:15:50,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:50,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205061138] [2024-06-27 20:15:50,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:50,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:50,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:50,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:50,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:50,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205061138] [2024-06-27 20:15:50,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205061138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:50,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:50,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:15:50,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015662899] [2024-06-27 20:15:50,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:50,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:15:50,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:50,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:15:50,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:15:50,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:15:50,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 175 transitions, 1564 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:50,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:50,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:15:50,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:51,363 INFO L124 PetriNetUnfolderBase]: 2456/3873 cut-off events. [2024-06-27 20:15:51,363 INFO L125 PetriNetUnfolderBase]: For 159109/159121 co-relation queries the response was YES. [2024-06-27 20:15:51,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24037 conditions, 3873 events. 2456/3873 cut-off events. For 159109/159121 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 21224 event pairs, 721 based on Foata normal form. 13/3885 useless extension candidates. Maximal degree in co-relation 23970. Up to 3705 conditions per place. [2024-06-27 20:15:51,391 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 160 selfloop transitions, 29 changer transitions 0/193 dead transitions. [2024-06-27 20:15:51,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 193 transitions, 2054 flow [2024-06-27 20:15:51,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:15:51,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:15:51,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-27 20:15:51,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37630662020905925 [2024-06-27 20:15:51,393 INFO L175 Difference]: Start difference. First operand has 142 places, 175 transitions, 1564 flow. Second operand 7 states and 108 transitions. [2024-06-27 20:15:51,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 193 transitions, 2054 flow [2024-06-27 20:15:51,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 193 transitions, 1970 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 20:15:51,504 INFO L231 Difference]: Finished difference. Result has 145 places, 181 transitions, 1638 flow [2024-06-27 20:15:51,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1480, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1638, PETRI_PLACES=145, PETRI_TRANSITIONS=181} [2024-06-27 20:15:51,504 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 103 predicate places. [2024-06-27 20:15:51,504 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 181 transitions, 1638 flow [2024-06-27 20:15:51,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:51,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:51,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:51,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 20:15:51,505 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:15:51,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:51,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1681771293, now seen corresponding path program 1 times [2024-06-27 20:15:51,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:51,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903888841] [2024-06-27 20:15:51,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:51,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:51,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:51,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:51,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:51,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903888841] [2024-06-27 20:15:51,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903888841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:51,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:51,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:15:51,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671342606] [2024-06-27 20:15:51,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:51,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:15:51,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:51,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:15:51,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:15:52,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:15:52,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 181 transitions, 1638 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:52,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:52,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:15:52,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:52,654 INFO L124 PetriNetUnfolderBase]: 2362/3766 cut-off events. [2024-06-27 20:15:52,654 INFO L125 PetriNetUnfolderBase]: For 169463/169465 co-relation queries the response was YES. [2024-06-27 20:15:52,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24026 conditions, 3766 events. 2362/3766 cut-off events. For 169463/169465 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 20867 event pairs, 676 based on Foata normal form. 2/3767 useless extension candidates. Maximal degree in co-relation 23957. Up to 3533 conditions per place. [2024-06-27 20:15:52,688 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 178 selfloop transitions, 17 changer transitions 0/204 dead transitions. [2024-06-27 20:15:52,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 204 transitions, 2134 flow [2024-06-27 20:15:52,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:15:52,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:15:52,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 20:15:52,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 20:15:52,689 INFO L175 Difference]: Start difference. First operand has 145 places, 181 transitions, 1638 flow. Second operand 7 states and 119 transitions. [2024-06-27 20:15:52,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 204 transitions, 2134 flow [2024-06-27 20:15:52,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 204 transitions, 2061 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 20:15:52,829 INFO L231 Difference]: Finished difference. Result has 150 places, 187 transitions, 1673 flow [2024-06-27 20:15:52,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1565, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1673, PETRI_PLACES=150, PETRI_TRANSITIONS=187} [2024-06-27 20:15:52,829 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 108 predicate places. [2024-06-27 20:15:52,830 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 187 transitions, 1673 flow [2024-06-27 20:15:52,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:52,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:52,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:52,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 20:15:52,830 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:15:52,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:52,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1681651323, now seen corresponding path program 2 times [2024-06-27 20:15:52,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:52,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038528942] [2024-06-27 20:15:52,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:52,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:52,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:53,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:53,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:53,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038528942] [2024-06-27 20:15:53,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038528942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:53,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:53,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:15:53,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218064731] [2024-06-27 20:15:53,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:53,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:15:53,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:53,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:15:53,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:15:53,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:15:53,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 187 transitions, 1673 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:53,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:53,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:15:53,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:54,017 INFO L124 PetriNetUnfolderBase]: 2380/3791 cut-off events. [2024-06-27 20:15:54,017 INFO L125 PetriNetUnfolderBase]: For 178235/178237 co-relation queries the response was YES. [2024-06-27 20:15:54,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24984 conditions, 3791 events. 2380/3791 cut-off events. For 178235/178237 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 20965 event pairs, 676 based on Foata normal form. 2/3792 useless extension candidates. Maximal degree in co-relation 24912. Up to 3545 conditions per place. [2024-06-27 20:15:54,049 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 176 selfloop transitions, 24 changer transitions 0/209 dead transitions. [2024-06-27 20:15:54,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 209 transitions, 2299 flow [2024-06-27 20:15:54,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:15:54,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:15:54,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 20:15:54,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-27 20:15:54,051 INFO L175 Difference]: Start difference. First operand has 150 places, 187 transitions, 1673 flow. Second operand 7 states and 120 transitions. [2024-06-27 20:15:54,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 209 transitions, 2299 flow [2024-06-27 20:15:54,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 209 transitions, 2247 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-27 20:15:54,167 INFO L231 Difference]: Finished difference. Result has 154 places, 193 transitions, 1773 flow [2024-06-27 20:15:54,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1621, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1773, PETRI_PLACES=154, PETRI_TRANSITIONS=193} [2024-06-27 20:15:54,168 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 112 predicate places. [2024-06-27 20:15:54,168 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 193 transitions, 1773 flow [2024-06-27 20:15:54,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:54,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:54,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:54,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 20:15:54,169 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)] === [2024-06-27 20:15:54,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:54,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1681651137, now seen corresponding path program 1 times [2024-06-27 20:15:54,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:54,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727066722] [2024-06-27 20:15:54,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:54,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:54,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:54,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:54,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727066722] [2024-06-27 20:15:54,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727066722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:54,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:54,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:15:54,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918264430] [2024-06-27 20:15:54,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:54,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:15:54,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:54,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:15:54,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:15:54,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:15:54,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 193 transitions, 1773 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:54,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:54,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:15:54,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:55,414 INFO L124 PetriNetUnfolderBase]: 2390/3807 cut-off events. [2024-06-27 20:15:55,414 INFO L125 PetriNetUnfolderBase]: For 188496/188498 co-relation queries the response was YES. [2024-06-27 20:15:55,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25549 conditions, 3807 events. 2390/3807 cut-off events. For 188496/188498 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 21077 event pairs, 676 based on Foata normal form. 3/3809 useless extension candidates. Maximal degree in co-relation 25476. Up to 3587 conditions per place. [2024-06-27 20:15:55,449 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 187 selfloop transitions, 14 changer transitions 0/210 dead transitions. [2024-06-27 20:15:55,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 210 transitions, 2257 flow [2024-06-27 20:15:55,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:15:55,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:15:55,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-27 20:15:55,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40069686411149824 [2024-06-27 20:15:55,450 INFO L175 Difference]: Start difference. First operand has 154 places, 193 transitions, 1773 flow. Second operand 7 states and 115 transitions. [2024-06-27 20:15:55,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 210 transitions, 2257 flow [2024-06-27 20:15:55,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 210 transitions, 2189 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-27 20:15:55,619 INFO L231 Difference]: Finished difference. Result has 157 places, 196 transitions, 1787 flow [2024-06-27 20:15:55,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1707, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1787, PETRI_PLACES=157, PETRI_TRANSITIONS=196} [2024-06-27 20:15:55,620 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 115 predicate places. [2024-06-27 20:15:55,620 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 196 transitions, 1787 flow [2024-06-27 20:15:55,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:55,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:55,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:55,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 20:15:55,621 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)] === [2024-06-27 20:15:55,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:55,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1504282467, now seen corresponding path program 2 times [2024-06-27 20:15:55,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:55,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178948578] [2024-06-27 20:15:55,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:55,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:55,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:56,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:56,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:56,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178948578] [2024-06-27 20:15:56,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178948578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:56,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:56,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:15:56,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625887300] [2024-06-27 20:15:56,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:56,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:15:56,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:56,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:15:56,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:15:56,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:15:56,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 196 transitions, 1787 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:56,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:56,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:15:56,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:56,984 INFO L124 PetriNetUnfolderBase]: 2395/3817 cut-off events. [2024-06-27 20:15:56,984 INFO L125 PetriNetUnfolderBase]: For 193950/193956 co-relation queries the response was YES. [2024-06-27 20:15:57,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25884 conditions, 3817 events. 2395/3817 cut-off events. For 193950/193956 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 21161 event pairs, 679 based on Foata normal form. 6/3822 useless extension candidates. Maximal degree in co-relation 25810. Up to 3578 conditions per place. [2024-06-27 20:15:57,018 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 181 selfloop transitions, 27 changer transitions 0/217 dead transitions. [2024-06-27 20:15:57,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 217 transitions, 2461 flow [2024-06-27 20:15:57,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:15:57,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:15:57,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-27 20:15:57,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40069686411149824 [2024-06-27 20:15:57,019 INFO L175 Difference]: Start difference. First operand has 157 places, 196 transitions, 1787 flow. Second operand 7 states and 115 transitions. [2024-06-27 20:15:57,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 217 transitions, 2461 flow [2024-06-27 20:15:57,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 217 transitions, 2369 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-27 20:15:57,204 INFO L231 Difference]: Finished difference. Result has 160 places, 206 transitions, 1920 flow [2024-06-27 20:15:57,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1729, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1920, PETRI_PLACES=160, PETRI_TRANSITIONS=206} [2024-06-27 20:15:57,205 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 118 predicate places. [2024-06-27 20:15:57,205 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 206 transitions, 1920 flow [2024-06-27 20:15:57,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:57,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:57,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:57,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 20:15:57,206 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)] === [2024-06-27 20:15:57,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:57,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1504519803, now seen corresponding path program 3 times [2024-06-27 20:15:57,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:57,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984849314] [2024-06-27 20:15:57,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:57,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:57,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:57,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:57,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:57,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984849314] [2024-06-27 20:15:57,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984849314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:57,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:57,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:15:57,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495905804] [2024-06-27 20:15:57,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:57,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:15:57,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:57,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:15:57,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:15:57,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:15:57,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 206 transitions, 1920 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:57,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:57,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:15:57,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:58,476 INFO L124 PetriNetUnfolderBase]: 2362/3783 cut-off events. [2024-06-27 20:15:58,476 INFO L125 PetriNetUnfolderBase]: For 201961/201965 co-relation queries the response was YES. [2024-06-27 20:15:58,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26014 conditions, 3783 events. 2362/3783 cut-off events. For 201961/201965 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 21156 event pairs, 668 based on Foata normal form. 2/3784 useless extension candidates. Maximal degree in co-relation 25938. Up to 3519 conditions per place. [2024-06-27 20:15:58,510 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 182 selfloop transitions, 31 changer transitions 0/222 dead transitions. [2024-06-27 20:15:58,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 222 transitions, 2530 flow [2024-06-27 20:15:58,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:15:58,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:15:58,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 20:15:58,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 20:15:58,512 INFO L175 Difference]: Start difference. First operand has 160 places, 206 transitions, 1920 flow. Second operand 7 states and 119 transitions. [2024-06-27 20:15:58,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 222 transitions, 2530 flow [2024-06-27 20:15:58,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 222 transitions, 2468 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-27 20:15:58,683 INFO L231 Difference]: Finished difference. Result has 164 places, 209 transitions, 1986 flow [2024-06-27 20:15:58,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1858, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1986, PETRI_PLACES=164, PETRI_TRANSITIONS=209} [2024-06-27 20:15:58,683 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2024-06-27 20:15:58,683 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 209 transitions, 1986 flow [2024-06-27 20:15:58,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:58,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:58,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:58,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 20:15:58,684 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)] === [2024-06-27 20:15:58,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:58,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1504519617, now seen corresponding path program 3 times [2024-06-27 20:15:58,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:58,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795136442] [2024-06-27 20:15:58,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:58,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:58,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:59,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:59,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:59,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795136442] [2024-06-27 20:15:59,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795136442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:59,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:59,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:15:59,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245819883] [2024-06-27 20:15:59,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:59,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:15:59,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:59,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:15:59,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:15:59,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:15:59,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 209 transitions, 1986 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:59,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:59,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:15:59,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:59,978 INFO L124 PetriNetUnfolderBase]: 2383/3801 cut-off events. [2024-06-27 20:15:59,978 INFO L125 PetriNetUnfolderBase]: For 206454/206460 co-relation queries the response was YES. [2024-06-27 20:15:59,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26499 conditions, 3801 events. 2383/3801 cut-off events. For 206454/206460 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 21117 event pairs, 677 based on Foata normal form. 6/3806 useless extension candidates. Maximal degree in co-relation 26421. Up to 3576 conditions per place. [2024-06-27 20:16:00,013 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 192 selfloop transitions, 19 changer transitions 0/220 dead transitions. [2024-06-27 20:16:00,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 220 transitions, 2441 flow [2024-06-27 20:16:00,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:16:00,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:16:00,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-27 20:16:00,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39372822299651566 [2024-06-27 20:16:00,014 INFO L175 Difference]: Start difference. First operand has 164 places, 209 transitions, 1986 flow. Second operand 7 states and 113 transitions. [2024-06-27 20:16:00,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 220 transitions, 2441 flow [2024-06-27 20:16:00,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 220 transitions, 2313 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-27 20:16:00,238 INFO L231 Difference]: Finished difference. Result has 166 places, 210 transitions, 1909 flow [2024-06-27 20:16:00,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1858, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1909, PETRI_PLACES=166, PETRI_TRANSITIONS=210} [2024-06-27 20:16:00,238 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 124 predicate places. [2024-06-27 20:16:00,238 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 210 transitions, 1909 flow [2024-06-27 20:16:00,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:00,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:00,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:00,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 20:16:00,239 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)] === [2024-06-27 20:16:00,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:00,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1093923149, now seen corresponding path program 1 times [2024-06-27 20:16:00,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:00,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840084597] [2024-06-27 20:16:00,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:00,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:00,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:00,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:00,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:00,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840084597] [2024-06-27 20:16:00,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840084597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:00,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:00,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:00,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336327016] [2024-06-27 20:16:00,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:00,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:00,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:00,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:00,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:00,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:16:00,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 210 transitions, 1909 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:00,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:00,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:16:00,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:01,590 INFO L124 PetriNetUnfolderBase]: 2507/3930 cut-off events. [2024-06-27 20:16:01,590 INFO L125 PetriNetUnfolderBase]: For 213758/213768 co-relation queries the response was YES. [2024-06-27 20:16:01,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27272 conditions, 3930 events. 2507/3930 cut-off events. For 213758/213768 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 21413 event pairs, 654 based on Foata normal form. 12/3941 useless extension candidates. Maximal degree in co-relation 27193. Up to 3669 conditions per place. [2024-06-27 20:16:01,625 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 195 selfloop transitions, 39 changer transitions 0/238 dead transitions. [2024-06-27 20:16:01,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 238 transitions, 2525 flow [2024-06-27 20:16:01,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:01,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:01,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 20:16:01,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-27 20:16:01,626 INFO L175 Difference]: Start difference. First operand has 166 places, 210 transitions, 1909 flow. Second operand 8 states and 135 transitions. [2024-06-27 20:16:01,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 238 transitions, 2525 flow [2024-06-27 20:16:01,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 238 transitions, 2485 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 20:16:01,818 INFO L231 Difference]: Finished difference. Result has 169 places, 214 transitions, 2030 flow [2024-06-27 20:16:01,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1869, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2030, PETRI_PLACES=169, PETRI_TRANSITIONS=214} [2024-06-27 20:16:01,818 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-27 20:16:01,818 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 214 transitions, 2030 flow [2024-06-27 20:16:01,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:01,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:01,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:01,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 20:16:01,819 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)] === [2024-06-27 20:16:01,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:01,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1799127758, now seen corresponding path program 1 times [2024-06-27 20:16:01,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:01,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942600305] [2024-06-27 20:16:01,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:01,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:01,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:02,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:02,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:02,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942600305] [2024-06-27 20:16:02,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942600305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:02,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:02,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:16:02,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385153582] [2024-06-27 20:16:02,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:02,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:16:02,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:02,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:16:02,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:16:02,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:16:02,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 214 transitions, 2030 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:02,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:02,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:16:02,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:03,059 INFO L124 PetriNetUnfolderBase]: 2517/3939 cut-off events. [2024-06-27 20:16:03,060 INFO L125 PetriNetUnfolderBase]: For 222903/222909 co-relation queries the response was YES. [2024-06-27 20:16:03,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28100 conditions, 3939 events. 2517/3939 cut-off events. For 222903/222909 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 21458 event pairs, 661 based on Foata normal form. 6/3944 useless extension candidates. Maximal degree in co-relation 28020. Up to 3685 conditions per place. [2024-06-27 20:16:03,096 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 199 selfloop transitions, 35 changer transitions 0/238 dead transitions. [2024-06-27 20:16:03,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 238 transitions, 2619 flow [2024-06-27 20:16:03,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:16:03,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:16:03,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 20:16:03,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 20:16:03,098 INFO L175 Difference]: Start difference. First operand has 169 places, 214 transitions, 2030 flow. Second operand 7 states and 119 transitions. [2024-06-27 20:16:03,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 238 transitions, 2619 flow [2024-06-27 20:16:03,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 238 transitions, 2486 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 20:16:03,362 INFO L231 Difference]: Finished difference. Result has 170 places, 218 transitions, 2039 flow [2024-06-27 20:16:03,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1897, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2039, PETRI_PLACES=170, PETRI_TRANSITIONS=218} [2024-06-27 20:16:03,363 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 128 predicate places. [2024-06-27 20:16:03,363 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 218 transitions, 2039 flow [2024-06-27 20:16:03,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:03,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:03,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:03,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 20:16:03,364 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)] === [2024-06-27 20:16:03,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:03,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1793413838, now seen corresponding path program 2 times [2024-06-27 20:16:03,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:03,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905478844] [2024-06-27 20:16:03,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:03,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:03,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:03,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:03,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:03,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905478844] [2024-06-27 20:16:03,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905478844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:03,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:03,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:16:03,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632758596] [2024-06-27 20:16:03,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:03,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:16:03,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:03,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:16:03,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:16:04,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:16:04,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 218 transitions, 2039 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:04,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:04,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:16:04,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:04,677 INFO L124 PetriNetUnfolderBase]: 2519/3941 cut-off events. [2024-06-27 20:16:04,678 INFO L125 PetriNetUnfolderBase]: For 230077/230083 co-relation queries the response was YES. [2024-06-27 20:16:04,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28193 conditions, 3941 events. 2519/3941 cut-off events. For 230077/230083 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 21472 event pairs, 662 based on Foata normal form. 6/3946 useless extension candidates. Maximal degree in co-relation 28112. Up to 3648 conditions per place. [2024-06-27 20:16:04,714 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 190 selfloop transitions, 44 changer transitions 0/238 dead transitions. [2024-06-27 20:16:04,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 238 transitions, 2713 flow [2024-06-27 20:16:04,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:16:04,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:16:04,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 20:16:04,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-27 20:16:04,715 INFO L175 Difference]: Start difference. First operand has 170 places, 218 transitions, 2039 flow. Second operand 7 states and 118 transitions. [2024-06-27 20:16:04,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 238 transitions, 2713 flow [2024-06-27 20:16:04,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 238 transitions, 2616 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 20:16:04,925 INFO L231 Difference]: Finished difference. Result has 172 places, 221 transitions, 2095 flow [2024-06-27 20:16:04,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1942, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2095, PETRI_PLACES=172, PETRI_TRANSITIONS=221} [2024-06-27 20:16:04,925 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-27 20:16:04,925 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 221 transitions, 2095 flow [2024-06-27 20:16:04,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:04,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:04,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:04,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 20:16:04,926 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)] === [2024-06-27 20:16:04,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:04,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1103177579, now seen corresponding path program 2 times [2024-06-27 20:16:04,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:04,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573637242] [2024-06-27 20:16:04,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:04,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:04,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:05,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:05,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:05,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573637242] [2024-06-27 20:16:05,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573637242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:05,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:05,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:05,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465947045] [2024-06-27 20:16:05,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:05,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:05,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:05,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:05,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:05,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:16:05,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 221 transitions, 2095 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:05,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:05,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:16:05,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:06,487 INFO L124 PetriNetUnfolderBase]: 2531/3960 cut-off events. [2024-06-27 20:16:06,487 INFO L125 PetriNetUnfolderBase]: For 239514/239520 co-relation queries the response was YES. [2024-06-27 20:16:06,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28492 conditions, 3960 events. 2531/3960 cut-off events. For 239514/239520 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 21557 event pairs, 662 based on Foata normal form. 6/3965 useless extension candidates. Maximal degree in co-relation 28410. Up to 3658 conditions per place. [2024-06-27 20:16:06,518 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 190 selfloop transitions, 49 changer transitions 0/243 dead transitions. [2024-06-27 20:16:06,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 243 transitions, 2805 flow [2024-06-27 20:16:06,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:06,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:06,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 20:16:06,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-27 20:16:06,519 INFO L175 Difference]: Start difference. First operand has 172 places, 221 transitions, 2095 flow. Second operand 8 states and 131 transitions. [2024-06-27 20:16:06,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 243 transitions, 2805 flow [2024-06-27 20:16:06,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 243 transitions, 2707 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 20:16:06,741 INFO L231 Difference]: Finished difference. Result has 176 places, 225 transitions, 2186 flow [2024-06-27 20:16:06,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1997, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2186, PETRI_PLACES=176, PETRI_TRANSITIONS=225} [2024-06-27 20:16:06,742 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 134 predicate places. [2024-06-27 20:16:06,742 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 225 transitions, 2186 flow [2024-06-27 20:16:06,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:06,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:06,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:06,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 20:16:06,743 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)] === [2024-06-27 20:16:06,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:06,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1793406305, now seen corresponding path program 3 times [2024-06-27 20:16:06,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:06,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854964831] [2024-06-27 20:16:06,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:06,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:06,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:07,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:07,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:07,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854964831] [2024-06-27 20:16:07,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854964831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:07,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:07,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:07,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794699838] [2024-06-27 20:16:07,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:07,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:07,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:07,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:07,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:07,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:16:07,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 225 transitions, 2186 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:07,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:07,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:16:07,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:08,171 INFO L124 PetriNetUnfolderBase]: 2559/4004 cut-off events. [2024-06-27 20:16:08,171 INFO L125 PetriNetUnfolderBase]: For 251864/251870 co-relation queries the response was YES. [2024-06-27 20:16:08,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29526 conditions, 4004 events. 2559/4004 cut-off events. For 251864/251870 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 21908 event pairs, 661 based on Foata normal form. 6/4009 useless extension candidates. Maximal degree in co-relation 29443. Up to 3658 conditions per place. [2024-06-27 20:16:08,217 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 192 selfloop transitions, 56 changer transitions 0/252 dead transitions. [2024-06-27 20:16:08,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 252 transitions, 3106 flow [2024-06-27 20:16:08,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:08,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:08,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 20:16:08,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-27 20:16:08,219 INFO L175 Difference]: Start difference. First operand has 176 places, 225 transitions, 2186 flow. Second operand 8 states and 133 transitions. [2024-06-27 20:16:08,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 252 transitions, 3106 flow [2024-06-27 20:16:08,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 252 transitions, 2945 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 20:16:08,559 INFO L231 Difference]: Finished difference. Result has 179 places, 233 transitions, 2334 flow [2024-06-27 20:16:08,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2025, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2334, PETRI_PLACES=179, PETRI_TRANSITIONS=233} [2024-06-27 20:16:08,560 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 137 predicate places. [2024-06-27 20:16:08,560 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 233 transitions, 2334 flow [2024-06-27 20:16:08,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:08,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:08,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:08,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 20:16:08,561 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)] === [2024-06-27 20:16:08,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:08,561 INFO L85 PathProgramCache]: Analyzing trace with hash -679125060, now seen corresponding path program 1 times [2024-06-27 20:16:08,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:08,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317877957] [2024-06-27 20:16:08,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:08,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:08,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:09,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:09,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:09,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317877957] [2024-06-27 20:16:09,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317877957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:09,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:09,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:09,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341626883] [2024-06-27 20:16:09,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:09,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:09,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:09,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:09,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:09,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:16:09,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 233 transitions, 2334 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:09,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:09,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:16:09,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:09,958 INFO L124 PetriNetUnfolderBase]: 2564/4017 cut-off events. [2024-06-27 20:16:09,958 INFO L125 PetriNetUnfolderBase]: For 260207/260213 co-relation queries the response was YES. [2024-06-27 20:16:09,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30278 conditions, 4017 events. 2564/4017 cut-off events. For 260207/260213 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 21904 event pairs, 675 based on Foata normal form. 7/4023 useless extension candidates. Maximal degree in co-relation 30193. Up to 3869 conditions per place. [2024-06-27 20:16:09,999 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 231 selfloop transitions, 19 changer transitions 0/254 dead transitions. [2024-06-27 20:16:09,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 254 transitions, 2960 flow [2024-06-27 20:16:09,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:09,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:10,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-27 20:16:10,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 20:16:10,000 INFO L175 Difference]: Start difference. First operand has 179 places, 233 transitions, 2334 flow. Second operand 8 states and 123 transitions. [2024-06-27 20:16:10,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 254 transitions, 2960 flow [2024-06-27 20:16:10,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 254 transitions, 2812 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-27 20:16:10,343 INFO L231 Difference]: Finished difference. Result has 183 places, 236 transitions, 2304 flow [2024-06-27 20:16:10,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2186, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2304, PETRI_PLACES=183, PETRI_TRANSITIONS=236} [2024-06-27 20:16:10,344 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-27 20:16:10,344 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 236 transitions, 2304 flow [2024-06-27 20:16:10,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:10,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:10,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:10,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 20:16:10,345 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)] === [2024-06-27 20:16:10,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:10,345 INFO L85 PathProgramCache]: Analyzing trace with hash 404831990, now seen corresponding path program 3 times [2024-06-27 20:16:10,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:10,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45886788] [2024-06-27 20:16:10,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:10,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:10,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:10,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:10,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:10,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45886788] [2024-06-27 20:16:10,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45886788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:10,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:10,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:16:10,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394443193] [2024-06-27 20:16:10,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:10,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:16:10,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:10,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:16:10,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:16:10,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:16:10,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 236 transitions, 2304 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:10,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:10,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:16:10,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:11,446 INFO L124 PetriNetUnfolderBase]: 2557/3998 cut-off events. [2024-06-27 20:16:11,447 INFO L125 PetriNetUnfolderBase]: For 266430/266436 co-relation queries the response was YES. [2024-06-27 20:16:11,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30438 conditions, 3998 events. 2557/3998 cut-off events. For 266430/266436 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 21762 event pairs, 664 based on Foata normal form. 2/3996 useless extension candidates. Maximal degree in co-relation 30351. Up to 3750 conditions per place. [2024-06-27 20:16:11,484 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 215 selfloop transitions, 35 changer transitions 0/254 dead transitions. [2024-06-27 20:16:11,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 254 transitions, 2866 flow [2024-06-27 20:16:11,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:16:11,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:16:11,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 20:16:11,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-27 20:16:11,489 INFO L175 Difference]: Start difference. First operand has 183 places, 236 transitions, 2304 flow. Second operand 7 states and 116 transitions. [2024-06-27 20:16:11,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 254 transitions, 2866 flow [2024-06-27 20:16:11,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 254 transitions, 2746 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-27 20:16:11,819 INFO L231 Difference]: Finished difference. Result has 184 places, 236 transitions, 2261 flow [2024-06-27 20:16:11,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2184, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2261, PETRI_PLACES=184, PETRI_TRANSITIONS=236} [2024-06-27 20:16:11,820 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 142 predicate places. [2024-06-27 20:16:11,820 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 236 transitions, 2261 flow [2024-06-27 20:16:11,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:11,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:11,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:11,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 20:16:11,821 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)] === [2024-06-27 20:16:11,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:11,821 INFO L85 PathProgramCache]: Analyzing trace with hash 2050423668, now seen corresponding path program 4 times [2024-06-27 20:16:11,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:11,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913566275] [2024-06-27 20:16:11,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:11,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:11,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:12,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:12,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:12,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913566275] [2024-06-27 20:16:12,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913566275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:12,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:12,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:16:12,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383499112] [2024-06-27 20:16:12,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:12,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:16:12,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:12,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:16:12,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:16:12,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:16:12,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 236 transitions, 2261 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:12,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:12,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:16:12,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:12,953 INFO L124 PetriNetUnfolderBase]: 2562/4003 cut-off events. [2024-06-27 20:16:12,954 INFO L125 PetriNetUnfolderBase]: For 275277/275283 co-relation queries the response was YES. [2024-06-27 20:16:12,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30704 conditions, 4003 events. 2562/4003 cut-off events. For 275277/275283 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 21760 event pairs, 662 based on Foata normal form. 2/4001 useless extension candidates. Maximal degree in co-relation 30616. Up to 3737 conditions per place. [2024-06-27 20:16:12,995 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 206 selfloop transitions, 44 changer transitions 0/254 dead transitions. [2024-06-27 20:16:12,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 254 transitions, 2861 flow [2024-06-27 20:16:12,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:16:12,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:16:12,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-27 20:16:12,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40069686411149824 [2024-06-27 20:16:12,996 INFO L175 Difference]: Start difference. First operand has 184 places, 236 transitions, 2261 flow. Second operand 7 states and 115 transitions. [2024-06-27 20:16:12,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 254 transitions, 2861 flow [2024-06-27 20:16:13,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 254 transitions, 2729 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 20:16:13,360 INFO L231 Difference]: Finished difference. Result has 184 places, 239 transitions, 2279 flow [2024-06-27 20:16:13,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2129, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2279, PETRI_PLACES=184, PETRI_TRANSITIONS=239} [2024-06-27 20:16:13,361 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 142 predicate places. [2024-06-27 20:16:13,361 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 239 transitions, 2279 flow [2024-06-27 20:16:13,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:13,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:13,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:13,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 20:16:13,362 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)] === [2024-06-27 20:16:13,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:13,362 INFO L85 PathProgramCache]: Analyzing trace with hash 598805810, now seen corresponding path program 5 times [2024-06-27 20:16:13,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:13,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416579703] [2024-06-27 20:16:13,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:13,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:13,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:13,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:13,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:13,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416579703] [2024-06-27 20:16:13,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416579703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:13,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:13,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:16:13,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598898916] [2024-06-27 20:16:13,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:13,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:16:13,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:13,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:16:13,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:16:13,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:16:13,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 239 transitions, 2279 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:13,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:13,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:16:13,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:14,565 INFO L124 PetriNetUnfolderBase]: 2564/4011 cut-off events. [2024-06-27 20:16:14,566 INFO L125 PetriNetUnfolderBase]: For 284878/284888 co-relation queries the response was YES. [2024-06-27 20:16:14,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30832 conditions, 4011 events. 2564/4011 cut-off events. For 284878/284888 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 21866 event pairs, 684 based on Foata normal form. 7/4016 useless extension candidates. Maximal degree in co-relation 30743. Up to 3677 conditions per place. [2024-06-27 20:16:14,598 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 190 selfloop transitions, 60 changer transitions 0/254 dead transitions. [2024-06-27 20:16:14,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 254 transitions, 2983 flow [2024-06-27 20:16:14,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:16:14,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:16:14,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-27 20:16:14,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40069686411149824 [2024-06-27 20:16:14,599 INFO L175 Difference]: Start difference. First operand has 184 places, 239 transitions, 2279 flow. Second operand 7 states and 115 transitions. [2024-06-27 20:16:14,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 254 transitions, 2983 flow [2024-06-27 20:16:14,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 254 transitions, 2865 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 20:16:14,906 INFO L231 Difference]: Finished difference. Result has 186 places, 242 transitions, 2347 flow [2024-06-27 20:16:14,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2161, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2347, PETRI_PLACES=186, PETRI_TRANSITIONS=242} [2024-06-27 20:16:14,906 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-27 20:16:14,906 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 242 transitions, 2347 flow [2024-06-27 20:16:14,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:14,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:14,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:14,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 20:16:14,907 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)] === [2024-06-27 20:16:14,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:14,907 INFO L85 PathProgramCache]: Analyzing trace with hash 604519730, now seen corresponding path program 6 times [2024-06-27 20:16:14,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:14,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385663518] [2024-06-27 20:16:14,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:14,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:14,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:15,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:15,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:15,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385663518] [2024-06-27 20:16:15,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385663518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:15,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:15,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:16:15,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776864980] [2024-06-27 20:16:15,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:15,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:16:15,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:15,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:16:15,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:16:15,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:16:15,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 242 transitions, 2347 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:15,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:15,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:16:15,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:16,060 INFO L124 PetriNetUnfolderBase]: 2559/4003 cut-off events. [2024-06-27 20:16:16,061 INFO L125 PetriNetUnfolderBase]: For 291461/291471 co-relation queries the response was YES. [2024-06-27 20:16:16,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30903 conditions, 4003 events. 2559/4003 cut-off events. For 291461/291471 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 21831 event pairs, 683 based on Foata normal form. 6/4007 useless extension candidates. Maximal degree in co-relation 30813. Up to 3672 conditions per place. [2024-06-27 20:16:16,096 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 185 selfloop transitions, 64 changer transitions 0/253 dead transitions. [2024-06-27 20:16:16,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 253 transitions, 2879 flow [2024-06-27 20:16:16,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:16:16,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:16:16,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-27 20:16:16,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39372822299651566 [2024-06-27 20:16:16,098 INFO L175 Difference]: Start difference. First operand has 186 places, 242 transitions, 2347 flow. Second operand 7 states and 113 transitions. [2024-06-27 20:16:16,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 253 transitions, 2879 flow [2024-06-27 20:16:16,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 253 transitions, 2707 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-27 20:16:16,387 INFO L231 Difference]: Finished difference. Result has 189 places, 242 transitions, 2309 flow [2024-06-27 20:16:16,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2175, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2309, PETRI_PLACES=189, PETRI_TRANSITIONS=242} [2024-06-27 20:16:16,387 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 147 predicate places. [2024-06-27 20:16:16,388 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 242 transitions, 2309 flow [2024-06-27 20:16:16,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:16,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:16,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:16,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 20:16:16,388 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)] === [2024-06-27 20:16:16,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:16,389 INFO L85 PathProgramCache]: Analyzing trace with hash 612146226, now seen corresponding path program 2 times [2024-06-27 20:16:16,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:16,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641889500] [2024-06-27 20:16:16,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:16,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:16,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:17,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:17,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:17,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641889500] [2024-06-27 20:16:17,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641889500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:17,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:17,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:17,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102277940] [2024-06-27 20:16:17,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:17,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:17,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:17,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:17,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:17,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:16:17,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 242 transitions, 2309 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:17,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:17,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:16:17,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:17,971 INFO L124 PetriNetUnfolderBase]: 2569/4020 cut-off events. [2024-06-27 20:16:17,971 INFO L125 PetriNetUnfolderBase]: For 302956/302958 co-relation queries the response was YES. [2024-06-27 20:16:17,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31170 conditions, 4020 events. 2569/4020 cut-off events. For 302956/302958 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 21900 event pairs, 703 based on Foata normal form. 2/4021 useless extension candidates. Maximal degree in co-relation 31079. Up to 3887 conditions per place. [2024-06-27 20:16:18,011 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 235 selfloop transitions, 19 changer transitions 0/258 dead transitions. [2024-06-27 20:16:18,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 258 transitions, 2934 flow [2024-06-27 20:16:18,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:18,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:18,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-27 20:16:18,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3628048780487805 [2024-06-27 20:16:18,020 INFO L175 Difference]: Start difference. First operand has 189 places, 242 transitions, 2309 flow. Second operand 8 states and 119 transitions. [2024-06-27 20:16:18,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 258 transitions, 2934 flow [2024-06-27 20:16:18,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 258 transitions, 2768 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 20:16:18,333 INFO L231 Difference]: Finished difference. Result has 190 places, 245 transitions, 2268 flow [2024-06-27 20:16:18,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2143, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2268, PETRI_PLACES=190, PETRI_TRANSITIONS=245} [2024-06-27 20:16:18,333 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 148 predicate places. [2024-06-27 20:16:18,333 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 245 transitions, 2268 flow [2024-06-27 20:16:18,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:18,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:18,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:18,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 20:16:18,334 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)] === [2024-06-27 20:16:18,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:18,334 INFO L85 PathProgramCache]: Analyzing trace with hash 598813746, now seen corresponding path program 3 times [2024-06-27 20:16:18,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:18,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816630461] [2024-06-27 20:16:18,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:18,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:18,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:19,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:19,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:19,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816630461] [2024-06-27 20:16:19,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816630461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:19,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:19,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:19,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686925205] [2024-06-27 20:16:19,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:19,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:19,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:19,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:19,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:19,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:16:19,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 245 transitions, 2268 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:19,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:19,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:16:19,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:19,874 INFO L124 PetriNetUnfolderBase]: 2574/4035 cut-off events. [2024-06-27 20:16:19,874 INFO L125 PetriNetUnfolderBase]: For 311163/311175 co-relation queries the response was YES. [2024-06-27 20:16:19,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31496 conditions, 4035 events. 2574/4035 cut-off events. For 311163/311175 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 22030 event pairs, 669 based on Foata normal form. 13/4047 useless extension candidates. Maximal degree in co-relation 31404. Up to 3877 conditions per place. [2024-06-27 20:16:19,913 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 233 selfloop transitions, 24 changer transitions 0/261 dead transitions. [2024-06-27 20:16:19,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 261 transitions, 2902 flow [2024-06-27 20:16:19,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:19,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:19,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-27 20:16:19,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3628048780487805 [2024-06-27 20:16:19,914 INFO L175 Difference]: Start difference. First operand has 190 places, 245 transitions, 2268 flow. Second operand 8 states and 119 transitions. [2024-06-27 20:16:19,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 261 transitions, 2902 flow [2024-06-27 20:16:20,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 261 transitions, 2771 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-27 20:16:20,320 INFO L231 Difference]: Finished difference. Result has 191 places, 248 transitions, 2275 flow [2024-06-27 20:16:20,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2137, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2275, PETRI_PLACES=191, PETRI_TRANSITIONS=248} [2024-06-27 20:16:20,321 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 149 predicate places. [2024-06-27 20:16:20,321 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 248 transitions, 2275 flow [2024-06-27 20:16:20,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:20,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:20,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:20,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 20:16:20,322 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)] === [2024-06-27 20:16:20,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:20,323 INFO L85 PathProgramCache]: Analyzing trace with hash 611700353, now seen corresponding path program 4 times [2024-06-27 20:16:20,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:20,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934195804] [2024-06-27 20:16:20,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:20,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:20,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:21,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:21,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:21,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934195804] [2024-06-27 20:16:21,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934195804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:21,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:21,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:21,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569367563] [2024-06-27 20:16:21,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:21,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:21,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:21,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:21,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:21,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:16:21,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 248 transitions, 2275 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:21,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:21,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:16:21,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:21,783 INFO L124 PetriNetUnfolderBase]: 2602/4068 cut-off events. [2024-06-27 20:16:21,784 INFO L125 PetriNetUnfolderBase]: For 326054/326064 co-relation queries the response was YES. [2024-06-27 20:16:21,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32299 conditions, 4068 events. 2602/4068 cut-off events. For 326054/326064 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 22191 event pairs, 675 based on Foata normal form. 7/4073 useless extension candidates. Maximal degree in co-relation 32207. Up to 3621 conditions per place. [2024-06-27 20:16:21,822 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 188 selfloop transitions, 89 changer transitions 0/281 dead transitions. [2024-06-27 20:16:21,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 281 transitions, 3467 flow [2024-06-27 20:16:21,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:21,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:21,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 20:16:21,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-27 20:16:21,823 INFO L175 Difference]: Start difference. First operand has 191 places, 248 transitions, 2275 flow. Second operand 8 states and 131 transitions. [2024-06-27 20:16:21,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 281 transitions, 3467 flow [2024-06-27 20:16:22,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 281 transitions, 3351 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-27 20:16:22,185 INFO L231 Difference]: Finished difference. Result has 195 places, 265 transitions, 2699 flow [2024-06-27 20:16:22,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2159, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2699, PETRI_PLACES=195, PETRI_TRANSITIONS=265} [2024-06-27 20:16:22,186 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 153 predicate places. [2024-06-27 20:16:22,186 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 265 transitions, 2699 flow [2024-06-27 20:16:22,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:22,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:22,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:22,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 20:16:22,186 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)] === [2024-06-27 20:16:22,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:22,187 INFO L85 PathProgramCache]: Analyzing trace with hash 598813343, now seen corresponding path program 5 times [2024-06-27 20:16:22,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:22,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315019524] [2024-06-27 20:16:22,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:22,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:22,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:23,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:23,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:23,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315019524] [2024-06-27 20:16:23,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315019524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:23,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:23,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:23,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320564044] [2024-06-27 20:16:23,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:23,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:23,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:23,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:23,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:23,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:16:23,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 265 transitions, 2699 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:23,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:23,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:16:23,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:23,889 INFO L124 PetriNetUnfolderBase]: 2614/4088 cut-off events. [2024-06-27 20:16:23,889 INFO L125 PetriNetUnfolderBase]: For 340354/340364 co-relation queries the response was YES. [2024-06-27 20:16:23,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33499 conditions, 4088 events. 2614/4088 cut-off events. For 340354/340364 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 22287 event pairs, 683 based on Foata normal form. 7/4093 useless extension candidates. Maximal degree in co-relation 33404. Up to 3714 conditions per place. [2024-06-27 20:16:23,926 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 214 selfloop transitions, 67 changer transitions 0/285 dead transitions. [2024-06-27 20:16:23,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 285 transitions, 3627 flow [2024-06-27 20:16:23,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:23,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:23,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 20:16:23,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-27 20:16:23,931 INFO L175 Difference]: Start difference. First operand has 195 places, 265 transitions, 2699 flow. Second operand 8 states and 129 transitions. [2024-06-27 20:16:23,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 285 transitions, 3627 flow [2024-06-27 20:16:24,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 285 transitions, 3411 flow, removed 75 selfloop flow, removed 3 redundant places. [2024-06-27 20:16:24,317 INFO L231 Difference]: Finished difference. Result has 201 places, 271 transitions, 2805 flow [2024-06-27 20:16:24,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2495, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2805, PETRI_PLACES=201, PETRI_TRANSITIONS=271} [2024-06-27 20:16:24,317 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-27 20:16:24,318 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 271 transitions, 2805 flow [2024-06-27 20:16:24,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:24,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:24,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:24,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 20:16:24,318 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)] === [2024-06-27 20:16:24,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:24,319 INFO L85 PathProgramCache]: Analyzing trace with hash 598802183, now seen corresponding path program 6 times [2024-06-27 20:16:24,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:24,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091939196] [2024-06-27 20:16:24,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:24,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:24,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:25,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:25,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:25,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091939196] [2024-06-27 20:16:25,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091939196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:25,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:25,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:25,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214762793] [2024-06-27 20:16:25,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:25,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:25,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:25,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:25,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:25,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:16:25,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 271 transitions, 2805 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:25,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:25,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:16:25,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:25,784 INFO L124 PetriNetUnfolderBase]: 2616/4091 cut-off events. [2024-06-27 20:16:25,785 INFO L125 PetriNetUnfolderBase]: For 347797/347807 co-relation queries the response was YES. [2024-06-27 20:16:25,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33434 conditions, 4091 events. 2616/4091 cut-off events. For 347797/347807 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 22321 event pairs, 683 based on Foata normal form. 7/4096 useless extension candidates. Maximal degree in co-relation 33336. Up to 3746 conditions per place. [2024-06-27 20:16:25,826 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 217 selfloop transitions, 66 changer transitions 0/287 dead transitions. [2024-06-27 20:16:25,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 287 transitions, 3515 flow [2024-06-27 20:16:25,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:25,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:25,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 20:16:25,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-27 20:16:25,828 INFO L175 Difference]: Start difference. First operand has 201 places, 271 transitions, 2805 flow. Second operand 8 states and 127 transitions. [2024-06-27 20:16:25,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 287 transitions, 3515 flow [2024-06-27 20:16:26,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 287 transitions, 3337 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-27 20:16:26,281 INFO L231 Difference]: Finished difference. Result has 205 places, 275 transitions, 2882 flow [2024-06-27 20:16:26,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2635, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2882, PETRI_PLACES=205, PETRI_TRANSITIONS=275} [2024-06-27 20:16:26,282 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-27 20:16:26,282 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 275 transitions, 2882 flow [2024-06-27 20:16:26,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:26,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:26,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:26,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 20:16:26,283 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)] === [2024-06-27 20:16:26,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:26,283 INFO L85 PathProgramCache]: Analyzing trace with hash 611700756, now seen corresponding path program 4 times [2024-06-27 20:16:26,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:26,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108690451] [2024-06-27 20:16:26,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:26,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:26,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:27,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:27,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:27,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108690451] [2024-06-27 20:16:27,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108690451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:27,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:27,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:27,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202847709] [2024-06-27 20:16:27,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:27,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:27,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:27,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:27,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:27,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:16:27,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 275 transitions, 2882 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:27,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:27,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:16:27,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:27,743 INFO L124 PetriNetUnfolderBase]: 2618/4105 cut-off events. [2024-06-27 20:16:27,744 INFO L125 PetriNetUnfolderBase]: For 362184/362196 co-relation queries the response was YES. [2024-06-27 20:16:27,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33724 conditions, 4105 events. 2618/4105 cut-off events. For 362184/362196 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 22492 event pairs, 668 based on Foata normal form. 14/4118 useless extension candidates. Maximal degree in co-relation 33624. Up to 3901 conditions per place. [2024-06-27 20:16:27,788 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 250 selfloop transitions, 44 changer transitions 0/298 dead transitions. [2024-06-27 20:16:27,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 298 transitions, 3851 flow [2024-06-27 20:16:27,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:27,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:27,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 20:16:27,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-27 20:16:27,789 INFO L175 Difference]: Start difference. First operand has 205 places, 275 transitions, 2882 flow. Second operand 8 states and 126 transitions. [2024-06-27 20:16:27,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 298 transitions, 3851 flow [2024-06-27 20:16:28,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 298 transitions, 3650 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-27 20:16:28,295 INFO L231 Difference]: Finished difference. Result has 207 places, 281 transitions, 2969 flow [2024-06-27 20:16:28,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2681, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2969, PETRI_PLACES=207, PETRI_TRANSITIONS=281} [2024-06-27 20:16:28,296 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-27 20:16:28,296 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 281 transitions, 2969 flow [2024-06-27 20:16:28,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:28,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:28,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:28,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 20:16:28,297 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)] === [2024-06-27 20:16:28,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:28,297 INFO L85 PathProgramCache]: Analyzing trace with hash 2046708814, now seen corresponding path program 1 times [2024-06-27 20:16:28,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:28,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461902814] [2024-06-27 20:16:28,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:28,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:28,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:29,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:29,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:29,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461902814] [2024-06-27 20:16:29,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461902814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:29,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:29,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:29,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284648083] [2024-06-27 20:16:29,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:29,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:29,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:29,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:29,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:29,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:16:29,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 281 transitions, 2969 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:29,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:29,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:16:29,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:29,834 INFO L124 PetriNetUnfolderBase]: 2531/4009 cut-off events. [2024-06-27 20:16:29,834 INFO L125 PetriNetUnfolderBase]: For 371315/371317 co-relation queries the response was YES. [2024-06-27 20:16:29,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33380 conditions, 4009 events. 2531/4009 cut-off events. For 371315/371317 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 22328 event pairs, 668 based on Foata normal form. 1/4009 useless extension candidates. Maximal degree in co-relation 33279. Up to 3721 conditions per place. [2024-06-27 20:16:29,875 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 260 selfloop transitions, 19 changer transitions 0/298 dead transitions. [2024-06-27 20:16:29,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 298 transitions, 3579 flow [2024-06-27 20:16:29,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:16:29,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:16:29,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 20:16:29,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 20:16:29,876 INFO L175 Difference]: Start difference. First operand has 207 places, 281 transitions, 2969 flow. Second operand 7 states and 119 transitions. [2024-06-27 20:16:29,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 298 transitions, 3579 flow [2024-06-27 20:16:30,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 298 transitions, 3437 flow, removed 56 selfloop flow, removed 4 redundant places. [2024-06-27 20:16:30,375 INFO L231 Difference]: Finished difference. Result has 210 places, 281 transitions, 2875 flow [2024-06-27 20:16:30,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2827, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2875, PETRI_PLACES=210, PETRI_TRANSITIONS=281} [2024-06-27 20:16:30,375 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-27 20:16:30,375 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 281 transitions, 2875 flow [2024-06-27 20:16:30,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:30,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:30,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:30,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 20:16:30,376 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)] === [2024-06-27 20:16:30,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:30,376 INFO L85 PathProgramCache]: Analyzing trace with hash 2046712689, now seen corresponding path program 1 times [2024-06-27 20:16:30,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:30,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121320519] [2024-06-27 20:16:30,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:30,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:30,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:31,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:31,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:31,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121320519] [2024-06-27 20:16:31,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121320519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:31,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:31,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:31,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404630428] [2024-06-27 20:16:31,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:31,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:31,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:31,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:31,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:31,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:16:31,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 281 transitions, 2875 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:31,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:31,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:16:31,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:32,038 INFO L124 PetriNetUnfolderBase]: 2546/4032 cut-off events. [2024-06-27 20:16:32,038 INFO L125 PetriNetUnfolderBase]: For 386603/386605 co-relation queries the response was YES. [2024-06-27 20:16:32,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33586 conditions, 4032 events. 2546/4032 cut-off events. For 386603/386605 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 22443 event pairs, 666 based on Foata normal form. 4/4035 useless extension candidates. Maximal degree in co-relation 33483. Up to 3735 conditions per place. [2024-06-27 20:16:32,078 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 264 selfloop transitions, 20 changer transitions 0/303 dead transitions. [2024-06-27 20:16:32,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 303 transitions, 3547 flow [2024-06-27 20:16:32,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:32,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:32,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 20:16:32,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-27 20:16:32,080 INFO L175 Difference]: Start difference. First operand has 210 places, 281 transitions, 2875 flow. Second operand 8 states and 133 transitions. [2024-06-27 20:16:32,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 303 transitions, 3547 flow [2024-06-27 20:16:32,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 303 transitions, 3499 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 20:16:32,626 INFO L231 Difference]: Finished difference. Result has 212 places, 284 transitions, 2925 flow [2024-06-27 20:16:32,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2827, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2925, PETRI_PLACES=212, PETRI_TRANSITIONS=284} [2024-06-27 20:16:32,627 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 170 predicate places. [2024-06-27 20:16:32,627 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 284 transitions, 2925 flow [2024-06-27 20:16:32,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:32,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:32,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:32,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 20:16:32,628 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)] === [2024-06-27 20:16:32,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:32,628 INFO L85 PathProgramCache]: Analyzing trace with hash -591576423, now seen corresponding path program 2 times [2024-06-27 20:16:32,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:32,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16314404] [2024-06-27 20:16:32,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:32,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:32,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:33,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:33,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:33,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16314404] [2024-06-27 20:16:33,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16314404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:33,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:33,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:33,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043598391] [2024-06-27 20:16:33,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:33,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:33,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:33,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:33,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:33,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:16:33,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 284 transitions, 2925 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:33,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:33,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:16:33,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:34,162 INFO L124 PetriNetUnfolderBase]: 2585/4088 cut-off events. [2024-06-27 20:16:34,162 INFO L125 PetriNetUnfolderBase]: For 407419/407421 co-relation queries the response was YES. [2024-06-27 20:16:34,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34651 conditions, 4088 events. 2585/4088 cut-off events. For 407419/407421 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 22781 event pairs, 690 based on Foata normal form. 6/4093 useless extension candidates. Maximal degree in co-relation 34547. Up to 3784 conditions per place. [2024-06-27 20:16:34,209 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 265 selfloop transitions, 25 changer transitions 0/309 dead transitions. [2024-06-27 20:16:34,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 309 transitions, 3808 flow [2024-06-27 20:16:34,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:34,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:34,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 20:16:34,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-27 20:16:34,211 INFO L175 Difference]: Start difference. First operand has 212 places, 284 transitions, 2925 flow. Second operand 8 states and 133 transitions. [2024-06-27 20:16:34,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 309 transitions, 3808 flow [2024-06-27 20:16:34,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 309 transitions, 3732 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 20:16:34,786 INFO L231 Difference]: Finished difference. Result has 214 places, 291 transitions, 3030 flow [2024-06-27 20:16:34,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2849, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3030, PETRI_PLACES=214, PETRI_TRANSITIONS=291} [2024-06-27 20:16:34,787 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-27 20:16:34,787 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 291 transitions, 3030 flow [2024-06-27 20:16:34,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:34,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:34,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:34,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 20:16:34,788 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)] === [2024-06-27 20:16:34,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:34,788 INFO L85 PathProgramCache]: Analyzing trace with hash 2050431759, now seen corresponding path program 3 times [2024-06-27 20:16:34,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:34,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150044248] [2024-06-27 20:16:34,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:34,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:34,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:35,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:35,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:35,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150044248] [2024-06-27 20:16:35,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150044248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:35,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:35,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:35,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201045540] [2024-06-27 20:16:35,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:35,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:35,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:35,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:35,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:35,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:16:35,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 291 transitions, 3030 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:35,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:35,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:16:35,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:36,251 INFO L124 PetriNetUnfolderBase]: 2600/4110 cut-off events. [2024-06-27 20:16:36,252 INFO L125 PetriNetUnfolderBase]: For 414762/414764 co-relation queries the response was YES. [2024-06-27 20:16:36,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35361 conditions, 4110 events. 2600/4110 cut-off events. For 414762/414764 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 22923 event pairs, 669 based on Foata normal form. 4/4111 useless extension candidates. Maximal degree in co-relation 35256. Up to 3797 conditions per place. [2024-06-27 20:16:36,301 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 265 selfloop transitions, 27 changer transitions 0/311 dead transitions. [2024-06-27 20:16:36,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 311 transitions, 3724 flow [2024-06-27 20:16:36,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:36,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:36,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 20:16:36,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-27 20:16:36,302 INFO L175 Difference]: Start difference. First operand has 214 places, 291 transitions, 3030 flow. Second operand 8 states and 133 transitions. [2024-06-27 20:16:36,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 311 transitions, 3724 flow [2024-06-27 20:16:36,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 311 transitions, 3648 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-27 20:16:36,923 INFO L231 Difference]: Finished difference. Result has 218 places, 294 transitions, 3078 flow [2024-06-27 20:16:36,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2954, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3078, PETRI_PLACES=218, PETRI_TRANSITIONS=294} [2024-06-27 20:16:36,924 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-27 20:16:36,924 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 294 transitions, 3078 flow [2024-06-27 20:16:36,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:36,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:36,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:36,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 20:16:36,925 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)] === [2024-06-27 20:16:36,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:36,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1154030335, now seen corresponding path program 4 times [2024-06-27 20:16:36,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:36,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332880846] [2024-06-27 20:16:36,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:36,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:36,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:37,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:37,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:37,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332880846] [2024-06-27 20:16:37,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332880846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:37,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:37,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:37,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131442783] [2024-06-27 20:16:37,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:37,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:37,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:37,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:37,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:37,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:16:37,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 294 transitions, 3078 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:37,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:37,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:16:37,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:38,719 INFO L124 PetriNetUnfolderBase]: 2697/4251 cut-off events. [2024-06-27 20:16:38,719 INFO L125 PetriNetUnfolderBase]: For 453941/453947 co-relation queries the response was YES. [2024-06-27 20:16:38,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37564 conditions, 4251 events. 2697/4251 cut-off events. For 453941/453947 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 23727 event pairs, 685 based on Foata normal form. 10/4260 useless extension candidates. Maximal degree in co-relation 37457. Up to 3840 conditions per place. [2024-06-27 20:16:38,768 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 255 selfloop transitions, 49 changer transitions 0/323 dead transitions. [2024-06-27 20:16:38,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 323 transitions, 4270 flow [2024-06-27 20:16:38,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:38,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:38,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 20:16:38,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-27 20:16:38,770 INFO L175 Difference]: Start difference. First operand has 218 places, 294 transitions, 3078 flow. Second operand 8 states and 137 transitions. [2024-06-27 20:16:38,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 323 transitions, 4270 flow [2024-06-27 20:16:39,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 323 transitions, 4168 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 20:16:39,337 INFO L231 Difference]: Finished difference. Result has 221 places, 305 transitions, 3331 flow [2024-06-27 20:16:39,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2976, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3331, PETRI_PLACES=221, PETRI_TRANSITIONS=305} [2024-06-27 20:16:39,338 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-27 20:16:39,338 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 305 transitions, 3331 flow [2024-06-27 20:16:39,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:39,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:39,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:39,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 20:16:39,339 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)] === [2024-06-27 20:16:39,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:39,339 INFO L85 PathProgramCache]: Analyzing trace with hash 474789291, now seen corresponding path program 5 times [2024-06-27 20:16:39,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:39,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755606012] [2024-06-27 20:16:39,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:39,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:39,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:40,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:40,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:40,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755606012] [2024-06-27 20:16:40,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755606012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:40,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:40,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:40,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592951990] [2024-06-27 20:16:40,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:40,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:40,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:40,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:40,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:40,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:16:40,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 305 transitions, 3331 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:40,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:40,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:16:40,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:40,882 INFO L124 PetriNetUnfolderBase]: 2697/4250 cut-off events. [2024-06-27 20:16:40,882 INFO L125 PetriNetUnfolderBase]: For 458421/458425 co-relation queries the response was YES. [2024-06-27 20:16:40,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38170 conditions, 4250 events. 2697/4250 cut-off events. For 458421/458425 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 23724 event pairs, 691 based on Foata normal form. 4/4249 useless extension candidates. Maximal degree in co-relation 38061. Up to 3918 conditions per place. [2024-06-27 20:16:40,935 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 269 selfloop transitions, 34 changer transitions 0/322 dead transitions. [2024-06-27 20:16:40,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 322 transitions, 4049 flow [2024-06-27 20:16:40,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:40,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:40,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 20:16:40,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-27 20:16:40,939 INFO L175 Difference]: Start difference. First operand has 221 places, 305 transitions, 3331 flow. Second operand 8 states and 132 transitions. [2024-06-27 20:16:40,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 322 transitions, 4049 flow [2024-06-27 20:16:41,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 322 transitions, 3927 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-06-27 20:16:41,583 INFO L231 Difference]: Finished difference. Result has 226 places, 308 transitions, 3359 flow [2024-06-27 20:16:41,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3213, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3359, PETRI_PLACES=226, PETRI_TRANSITIONS=308} [2024-06-27 20:16:41,584 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-27 20:16:41,584 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 308 transitions, 3359 flow [2024-06-27 20:16:41,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:41,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:41,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:41,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 20:16:41,585 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)] === [2024-06-27 20:16:41,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:41,585 INFO L85 PathProgramCache]: Analyzing trace with hash 604533401, now seen corresponding path program 6 times [2024-06-27 20:16:41,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:41,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549958381] [2024-06-27 20:16:41,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:41,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:41,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:42,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:42,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:42,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549958381] [2024-06-27 20:16:42,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549958381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:42,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:42,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:42,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580459311] [2024-06-27 20:16:42,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:42,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:42,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:42,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:42,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:42,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:16:42,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 308 transitions, 3359 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:42,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:42,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:16:42,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:43,199 INFO L124 PetriNetUnfolderBase]: 2699/4257 cut-off events. [2024-06-27 20:16:43,199 INFO L125 PetriNetUnfolderBase]: For 462859/462865 co-relation queries the response was YES. [2024-06-27 20:16:43,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37842 conditions, 4257 events. 2699/4257 cut-off events. For 462859/462865 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 23785 event pairs, 682 based on Foata normal form. 10/4266 useless extension candidates. Maximal degree in co-relation 37731. Up to 3933 conditions per place. [2024-06-27 20:16:43,248 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 280 selfloop transitions, 28 changer transitions 0/327 dead transitions. [2024-06-27 20:16:43,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 327 transitions, 4263 flow [2024-06-27 20:16:43,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:43,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:43,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 20:16:43,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-27 20:16:43,251 INFO L175 Difference]: Start difference. First operand has 226 places, 308 transitions, 3359 flow. Second operand 8 states and 132 transitions. [2024-06-27 20:16:43,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 327 transitions, 4263 flow [2024-06-27 20:16:43,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 327 transitions, 4139 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 20:16:43,822 INFO L231 Difference]: Finished difference. Result has 229 places, 313 transitions, 3422 flow [2024-06-27 20:16:43,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3235, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3422, PETRI_PLACES=229, PETRI_TRANSITIONS=313} [2024-06-27 20:16:43,823 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-27 20:16:43,823 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 313 transitions, 3422 flow [2024-06-27 20:16:43,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:43,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:43,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:43,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 20:16:43,823 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)] === [2024-06-27 20:16:43,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:43,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1153753288, now seen corresponding path program 1 times [2024-06-27 20:16:43,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:43,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163115705] [2024-06-27 20:16:43,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:43,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:43,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:44,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:44,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:44,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163115705] [2024-06-27 20:16:44,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163115705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:44,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:44,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:44,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212915281] [2024-06-27 20:16:44,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:44,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:44,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:44,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:44,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:44,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:16:44,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 313 transitions, 3422 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:44,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:44,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:16:44,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:45,642 INFO L124 PetriNetUnfolderBase]: 2808/4363 cut-off events. [2024-06-27 20:16:45,642 INFO L125 PetriNetUnfolderBase]: For 458523/458525 co-relation queries the response was YES. [2024-06-27 20:16:45,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38518 conditions, 4363 events. 2808/4363 cut-off events. For 458523/458525 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 23813 event pairs, 720 based on Foata normal form. 2/4364 useless extension candidates. Maximal degree in co-relation 38405. Up to 4224 conditions per place. [2024-06-27 20:16:45,693 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 306 selfloop transitions, 18 changer transitions 0/328 dead transitions. [2024-06-27 20:16:45,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 328 transitions, 4193 flow [2024-06-27 20:16:45,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:45,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:45,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-27 20:16:45,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597560975609756 [2024-06-27 20:16:45,694 INFO L175 Difference]: Start difference. First operand has 229 places, 313 transitions, 3422 flow. Second operand 8 states and 118 transitions. [2024-06-27 20:16:45,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 328 transitions, 4193 flow [2024-06-27 20:16:46,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 328 transitions, 4027 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-27 20:16:46,283 INFO L231 Difference]: Finished difference. Result has 230 places, 315 transitions, 3385 flow [2024-06-27 20:16:46,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3256, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3385, PETRI_PLACES=230, PETRI_TRANSITIONS=315} [2024-06-27 20:16:46,283 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-27 20:16:46,283 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 315 transitions, 3385 flow [2024-06-27 20:16:46,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:46,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:46,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:46,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 20:16:46,284 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)] === [2024-06-27 20:16:46,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:46,284 INFO L85 PathProgramCache]: Analyzing trace with hash 411464044, now seen corresponding path program 1 times [2024-06-27 20:16:46,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:46,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142598953] [2024-06-27 20:16:46,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:46,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:46,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:46,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:46,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:46,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142598953] [2024-06-27 20:16:46,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142598953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:46,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:46,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:46,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370819700] [2024-06-27 20:16:46,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:46,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:46,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:46,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:46,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:46,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:16:46,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 315 transitions, 3385 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:46,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:46,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:16:46,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:47,835 INFO L124 PetriNetUnfolderBase]: 2824/4389 cut-off events. [2024-06-27 20:16:47,835 INFO L125 PetriNetUnfolderBase]: For 477443/477453 co-relation queries the response was YES. [2024-06-27 20:16:47,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38641 conditions, 4389 events. 2824/4389 cut-off events. For 477443/477453 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 24021 event pairs, 514 based on Foata normal form. 14/4402 useless extension candidates. Maximal degree in co-relation 38528. Up to 4056 conditions per place. [2024-06-27 20:16:47,890 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 306 selfloop transitions, 37 changer transitions 0/347 dead transitions. [2024-06-27 20:16:47,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 347 transitions, 4269 flow [2024-06-27 20:16:47,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:47,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:47,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 20:16:47,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-27 20:16:47,891 INFO L175 Difference]: Start difference. First operand has 230 places, 315 transitions, 3385 flow. Second operand 8 states and 138 transitions. [2024-06-27 20:16:47,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 347 transitions, 4269 flow [2024-06-27 20:16:48,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 347 transitions, 4156 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-27 20:16:48,527 INFO L231 Difference]: Finished difference. Result has 232 places, 318 transitions, 3462 flow [2024-06-27 20:16:48,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3272, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3462, PETRI_PLACES=232, PETRI_TRANSITIONS=318} [2024-06-27 20:16:48,528 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-27 20:16:48,528 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 318 transitions, 3462 flow [2024-06-27 20:16:48,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:48,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:48,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:48,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 20:16:48,529 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)] === [2024-06-27 20:16:48,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:48,530 INFO L85 PathProgramCache]: Analyzing trace with hash -456462042, now seen corresponding path program 2 times [2024-06-27 20:16:48,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:48,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725520503] [2024-06-27 20:16:48,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:48,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:48,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:49,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:49,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:49,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725520503] [2024-06-27 20:16:49,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725520503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:49,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:49,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:49,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929686837] [2024-06-27 20:16:49,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:49,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:49,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:49,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:49,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:49,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:16:49,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 318 transitions, 3462 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:49,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:49,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:16:49,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:50,253 INFO L124 PetriNetUnfolderBase]: 2840/4413 cut-off events. [2024-06-27 20:16:50,253 INFO L125 PetriNetUnfolderBase]: For 491215/491225 co-relation queries the response was YES. [2024-06-27 20:16:50,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39332 conditions, 4413 events. 2840/4413 cut-off events. For 491215/491225 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 24227 event pairs, 668 based on Foata normal form. 14/4426 useless extension candidates. Maximal degree in co-relation 39218. Up to 4133 conditions per place. [2024-06-27 20:16:50,304 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 304 selfloop transitions, 38 changer transitions 0/346 dead transitions. [2024-06-27 20:16:50,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 346 transitions, 4338 flow [2024-06-27 20:16:50,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:50,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:50,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 20:16:50,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-27 20:16:50,306 INFO L175 Difference]: Start difference. First operand has 232 places, 318 transitions, 3462 flow. Second operand 8 states and 135 transitions. [2024-06-27 20:16:50,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 346 transitions, 4338 flow [2024-06-27 20:16:50,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 346 transitions, 4170 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-27 20:16:50,966 INFO L231 Difference]: Finished difference. Result has 234 places, 321 transitions, 3492 flow [2024-06-27 20:16:50,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3294, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3492, PETRI_PLACES=234, PETRI_TRANSITIONS=321} [2024-06-27 20:16:50,967 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-27 20:16:50,967 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 321 transitions, 3492 flow [2024-06-27 20:16:50,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:50,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:50,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:50,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 20:16:50,968 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)] === [2024-06-27 20:16:50,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:50,968 INFO L85 PathProgramCache]: Analyzing trace with hash -448119260, now seen corresponding path program 1 times [2024-06-27 20:16:50,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:50,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841545551] [2024-06-27 20:16:50,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:50,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:50,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:51,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:51,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:51,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841545551] [2024-06-27 20:16:51,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841545551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:51,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:51,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:16:51,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705130651] [2024-06-27 20:16:51,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:51,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:16:51,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:51,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:16:51,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:16:51,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:16:51,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 321 transitions, 3492 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:51,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:51,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:16:51,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:52,746 INFO L124 PetriNetUnfolderBase]: 2860/4441 cut-off events. [2024-06-27 20:16:52,746 INFO L125 PetriNetUnfolderBase]: For 504557/504567 co-relation queries the response was YES. [2024-06-27 20:16:52,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39802 conditions, 4441 events. 2860/4441 cut-off events. For 504557/504567 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 24401 event pairs, 667 based on Foata normal form. 14/4454 useless extension candidates. Maximal degree in co-relation 39687. Up to 4155 conditions per place. [2024-06-27 20:16:52,804 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 304 selfloop transitions, 43 changer transitions 0/351 dead transitions. [2024-06-27 20:16:52,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 351 transitions, 4406 flow [2024-06-27 20:16:52,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:16:52,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:16:52,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 20:16:52,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-27 20:16:52,806 INFO L175 Difference]: Start difference. First operand has 234 places, 321 transitions, 3492 flow. Second operand 9 states and 149 transitions. [2024-06-27 20:16:52,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 351 transitions, 4406 flow [2024-06-27 20:16:53,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 351 transitions, 4230 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-27 20:16:53,486 INFO L231 Difference]: Finished difference. Result has 237 places, 325 transitions, 3535 flow [2024-06-27 20:16:53,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3316, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3535, PETRI_PLACES=237, PETRI_TRANSITIONS=325} [2024-06-27 20:16:53,487 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-27 20:16:53,487 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 325 transitions, 3535 flow [2024-06-27 20:16:53,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:53,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:53,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:53,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 20:16:53,488 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)] === [2024-06-27 20:16:53,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:53,488 INFO L85 PathProgramCache]: Analyzing trace with hash -167553450, now seen corresponding path program 1 times [2024-06-27 20:16:53,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:53,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700114805] [2024-06-27 20:16:53,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:53,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:53,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:54,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:54,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:54,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700114805] [2024-06-27 20:16:54,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700114805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:54,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:54,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:54,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591092411] [2024-06-27 20:16:54,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:54,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:54,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:54,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:54,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:54,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:16:54,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 325 transitions, 3535 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:54,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:54,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:16:54,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:55,138 INFO L124 PetriNetUnfolderBase]: 2880/4463 cut-off events. [2024-06-27 20:16:55,138 INFO L125 PetriNetUnfolderBase]: For 517894/517898 co-relation queries the response was YES. [2024-06-27 20:16:55,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40423 conditions, 4463 events. 2880/4463 cut-off events. For 517894/517898 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 24462 event pairs, 623 based on Foata normal form. 4/4466 useless extension candidates. Maximal degree in co-relation 40307. Up to 3883 conditions per place. [2024-06-27 20:16:55,184 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 277 selfloop transitions, 83 changer transitions 0/364 dead transitions. [2024-06-27 20:16:55,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 364 transitions, 4518 flow [2024-06-27 20:16:55,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:55,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:55,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 20:16:55,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-27 20:16:55,186 INFO L175 Difference]: Start difference. First operand has 237 places, 325 transitions, 3535 flow. Second operand 8 states and 141 transitions. [2024-06-27 20:16:55,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 364 transitions, 4518 flow [2024-06-27 20:16:55,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 364 transitions, 4333 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-27 20:16:55,843 INFO L231 Difference]: Finished difference. Result has 239 places, 338 transitions, 3723 flow [2024-06-27 20:16:55,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3350, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3723, PETRI_PLACES=239, PETRI_TRANSITIONS=338} [2024-06-27 20:16:55,843 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-27 20:16:55,844 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 338 transitions, 3723 flow [2024-06-27 20:16:55,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:55,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:55,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:55,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 20:16:55,844 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)] === [2024-06-27 20:16:55,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:55,845 INFO L85 PathProgramCache]: Analyzing trace with hash 61615622, now seen corresponding path program 2 times [2024-06-27 20:16:55,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:55,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357021789] [2024-06-27 20:16:55,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:55,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:55,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:56,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:56,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:56,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357021789] [2024-06-27 20:16:56,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357021789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:56,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:56,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:56,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497410748] [2024-06-27 20:16:56,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:56,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:56,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:56,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:56,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:56,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:16:56,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 338 transitions, 3723 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:56,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:56,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:16:56,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:57,411 INFO L124 PetriNetUnfolderBase]: 2916/4521 cut-off events. [2024-06-27 20:16:57,411 INFO L125 PetriNetUnfolderBase]: For 541351/541355 co-relation queries the response was YES. [2024-06-27 20:16:57,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42154 conditions, 4521 events. 2916/4521 cut-off events. For 541351/541355 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 24842 event pairs, 626 based on Foata normal form. 4/4524 useless extension candidates. Maximal degree in co-relation 42036. Up to 3891 conditions per place. [2024-06-27 20:16:57,468 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 274 selfloop transitions, 92 changer transitions 0/370 dead transitions. [2024-06-27 20:16:57,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 370 transitions, 4913 flow [2024-06-27 20:16:57,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:57,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:57,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 20:16:57,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-27 20:16:57,470 INFO L175 Difference]: Start difference. First operand has 239 places, 338 transitions, 3723 flow. Second operand 8 states and 142 transitions. [2024-06-27 20:16:57,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 370 transitions, 4913 flow [2024-06-27 20:16:58,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 370 transitions, 4693 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-27 20:16:58,231 INFO L231 Difference]: Finished difference. Result has 243 places, 346 transitions, 3926 flow [2024-06-27 20:16:58,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3503, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3926, PETRI_PLACES=243, PETRI_TRANSITIONS=346} [2024-06-27 20:16:58,232 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-27 20:16:58,232 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 346 transitions, 3926 flow [2024-06-27 20:16:58,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:58,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:58,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:58,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 20:16:58,232 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)] === [2024-06-27 20:16:58,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:58,233 INFO L85 PathProgramCache]: Analyzing trace with hash -338251044, now seen corresponding path program 1 times [2024-06-27 20:16:58,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:58,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003860825] [2024-06-27 20:16:58,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:58,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:58,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:58,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:58,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:58,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003860825] [2024-06-27 20:16:58,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003860825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:58,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:58,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:58,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153737426] [2024-06-27 20:16:58,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:58,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:58,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:58,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:58,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:58,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:16:58,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 346 transitions, 3926 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:58,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:58,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:16:58,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:59,795 INFO L124 PetriNetUnfolderBase]: 2926/4535 cut-off events. [2024-06-27 20:16:59,795 INFO L125 PetriNetUnfolderBase]: For 553370/553376 co-relation queries the response was YES. [2024-06-27 20:16:59,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42787 conditions, 4535 events. 2926/4535 cut-off events. For 553370/553376 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 24974 event pairs, 608 based on Foata normal form. 6/4540 useless extension candidates. Maximal degree in co-relation 42668. Up to 4255 conditions per place. [2024-06-27 20:16:59,852 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 328 selfloop transitions, 39 changer transitions 0/371 dead transitions. [2024-06-27 20:16:59,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 371 transitions, 4806 flow [2024-06-27 20:16:59,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:59,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:59,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 20:16:59,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-27 20:16:59,854 INFO L175 Difference]: Start difference. First operand has 243 places, 346 transitions, 3926 flow. Second operand 8 states and 132 transitions. [2024-06-27 20:16:59,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 371 transitions, 4806 flow [2024-06-27 20:17:00,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 371 transitions, 4587 flow, removed 64 selfloop flow, removed 4 redundant places. [2024-06-27 20:17:00,634 INFO L231 Difference]: Finished difference. Result has 247 places, 350 transitions, 3878 flow [2024-06-27 20:17:00,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3707, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3878, PETRI_PLACES=247, PETRI_TRANSITIONS=350} [2024-06-27 20:17:00,635 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 205 predicate places. [2024-06-27 20:17:00,635 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 350 transitions, 3878 flow [2024-06-27 20:17:00,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:00,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:00,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:00,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 20:17:00,635 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)] === [2024-06-27 20:17:00,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:00,636 INFO L85 PathProgramCache]: Analyzing trace with hash 238747142, now seen corresponding path program 3 times [2024-06-27 20:17:00,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:00,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656300122] [2024-06-27 20:17:00,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:00,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:00,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:01,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:01,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:01,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656300122] [2024-06-27 20:17:01,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656300122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:01,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:01,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:01,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861527523] [2024-06-27 20:17:01,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:01,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:01,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:01,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:01,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:01,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:17:01,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 350 transitions, 3878 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:01,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:01,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:17:01,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:02,236 INFO L124 PetriNetUnfolderBase]: 2978/4617 cut-off events. [2024-06-27 20:17:02,236 INFO L125 PetriNetUnfolderBase]: For 583420/583424 co-relation queries the response was YES. [2024-06-27 20:17:02,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43976 conditions, 4617 events. 2978/4617 cut-off events. For 583420/583424 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 25446 event pairs, 651 based on Foata normal form. 4/4620 useless extension candidates. Maximal degree in co-relation 43855. Up to 3846 conditions per place. [2024-06-27 20:17:02,288 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 277 selfloop transitions, 97 changer transitions 0/378 dead transitions. [2024-06-27 20:17:02,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 378 transitions, 5088 flow [2024-06-27 20:17:02,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:02,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:02,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 20:17:02,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-27 20:17:02,290 INFO L175 Difference]: Start difference. First operand has 247 places, 350 transitions, 3878 flow. Second operand 8 states and 138 transitions. [2024-06-27 20:17:02,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 378 transitions, 5088 flow [2024-06-27 20:17:02,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 378 transitions, 4967 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 20:17:02,972 INFO L231 Difference]: Finished difference. Result has 249 places, 357 transitions, 4162 flow [2024-06-27 20:17:02,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3757, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4162, PETRI_PLACES=249, PETRI_TRANSITIONS=357} [2024-06-27 20:17:02,972 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-27 20:17:02,972 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 357 transitions, 4162 flow [2024-06-27 20:17:02,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:02,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:02,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:02,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 20:17:02,973 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)] === [2024-06-27 20:17:02,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:02,974 INFO L85 PathProgramCache]: Analyzing trace with hash 66257438, now seen corresponding path program 2 times [2024-06-27 20:17:02,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:02,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752274932] [2024-06-27 20:17:02,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:02,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:02,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:03,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:03,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:03,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752274932] [2024-06-27 20:17:03,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752274932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:03,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:03,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:03,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623198925] [2024-06-27 20:17:03,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:03,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:03,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:03,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:03,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:03,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:17:03,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 357 transitions, 4162 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:03,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:03,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:17:03,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:04,670 INFO L124 PetriNetUnfolderBase]: 2988/4625 cut-off events. [2024-06-27 20:17:04,671 INFO L125 PetriNetUnfolderBase]: For 597055/597061 co-relation queries the response was YES. [2024-06-27 20:17:04,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45005 conditions, 4625 events. 2988/4625 cut-off events. For 597055/597061 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 25446 event pairs, 615 based on Foata normal form. 6/4630 useless extension candidates. Maximal degree in co-relation 44883. Up to 4303 conditions per place. [2024-06-27 20:17:04,728 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 326 selfloop transitions, 48 changer transitions 0/378 dead transitions. [2024-06-27 20:17:04,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 378 transitions, 5048 flow [2024-06-27 20:17:04,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:04,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:04,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 20:17:04,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-27 20:17:04,729 INFO L175 Difference]: Start difference. First operand has 249 places, 357 transitions, 4162 flow. Second operand 8 states and 130 transitions. [2024-06-27 20:17:04,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 378 transitions, 5048 flow [2024-06-27 20:17:05,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 378 transitions, 4846 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-27 20:17:05,576 INFO L231 Difference]: Finished difference. Result has 253 places, 361 transitions, 4157 flow [2024-06-27 20:17:05,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3960, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4157, PETRI_PLACES=253, PETRI_TRANSITIONS=361} [2024-06-27 20:17:05,577 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-27 20:17:05,577 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 361 transitions, 4157 flow [2024-06-27 20:17:05,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:05,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:05,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:05,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 20:17:05,578 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)] === [2024-06-27 20:17:05,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:05,578 INFO L85 PathProgramCache]: Analyzing trace with hash 238984478, now seen corresponding path program 3 times [2024-06-27 20:17:05,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:05,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154445539] [2024-06-27 20:17:05,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:05,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:05,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:06,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:06,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:06,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154445539] [2024-06-27 20:17:06,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154445539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:06,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:06,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:06,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717212880] [2024-06-27 20:17:06,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:06,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:06,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:06,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:06,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:06,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:17:06,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 361 transitions, 4157 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:06,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:06,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:17:06,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:07,303 INFO L124 PetriNetUnfolderBase]: 2990/4628 cut-off events. [2024-06-27 20:17:07,304 INFO L125 PetriNetUnfolderBase]: For 604912/604918 co-relation queries the response was YES. [2024-06-27 20:17:07,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45027 conditions, 4628 events. 2990/4628 cut-off events. For 604912/604918 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 25500 event pairs, 612 based on Foata normal form. 6/4633 useless extension candidates. Maximal degree in co-relation 44903. Up to 4258 conditions per place. [2024-06-27 20:17:07,365 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 312 selfloop transitions, 66 changer transitions 0/382 dead transitions. [2024-06-27 20:17:07,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 382 transitions, 5203 flow [2024-06-27 20:17:07,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:07,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:07,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 20:17:07,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-27 20:17:07,366 INFO L175 Difference]: Start difference. First operand has 253 places, 361 transitions, 4157 flow. Second operand 8 states and 132 transitions. [2024-06-27 20:17:07,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 382 transitions, 5203 flow [2024-06-27 20:17:08,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 382 transitions, 5056 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 20:17:08,060 INFO L231 Difference]: Finished difference. Result has 255 places, 364 transitions, 4230 flow [2024-06-27 20:17:08,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4010, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4230, PETRI_PLACES=255, PETRI_TRANSITIONS=364} [2024-06-27 20:17:08,060 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 213 predicate places. [2024-06-27 20:17:08,060 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 364 transitions, 4230 flow [2024-06-27 20:17:08,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:08,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:08,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:08,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 20:17:08,061 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)] === [2024-06-27 20:17:08,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:08,061 INFO L85 PathProgramCache]: Analyzing trace with hash 238624010, now seen corresponding path program 3 times [2024-06-27 20:17:08,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:08,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757233083] [2024-06-27 20:17:08,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:08,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:08,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:08,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:08,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:08,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757233083] [2024-06-27 20:17:08,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757233083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:08,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:08,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:08,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778061228] [2024-06-27 20:17:08,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:08,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:08,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:08,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:08,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:08,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:17:08,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 364 transitions, 4230 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:08,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:08,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:17:08,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:09,825 INFO L124 PetriNetUnfolderBase]: 3006/4652 cut-off events. [2024-06-27 20:17:09,826 INFO L125 PetriNetUnfolderBase]: For 627996/628002 co-relation queries the response was YES. [2024-06-27 20:17:09,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45548 conditions, 4652 events. 3006/4652 cut-off events. For 627996/628002 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 25606 event pairs, 615 based on Foata normal form. 8/4659 useless extension candidates. Maximal degree in co-relation 45423. Up to 4324 conditions per place. [2024-06-27 20:17:09,886 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 333 selfloop transitions, 48 changer transitions 0/385 dead transitions. [2024-06-27 20:17:09,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 385 transitions, 5172 flow [2024-06-27 20:17:09,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:09,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:09,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 20:17:09,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-27 20:17:09,888 INFO L175 Difference]: Start difference. First operand has 255 places, 364 transitions, 4230 flow. Second operand 8 states and 130 transitions. [2024-06-27 20:17:09,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 385 transitions, 5172 flow [2024-06-27 20:17:10,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 385 transitions, 5013 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-27 20:17:10,607 INFO L231 Difference]: Finished difference. Result has 258 places, 367 transitions, 4305 flow [2024-06-27 20:17:10,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4071, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4305, PETRI_PLACES=258, PETRI_TRANSITIONS=367} [2024-06-27 20:17:10,607 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 216 predicate places. [2024-06-27 20:17:10,607 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 367 transitions, 4305 flow [2024-06-27 20:17:10,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:10,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:10,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:10,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 20:17:10,608 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)] === [2024-06-27 20:17:10,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:10,608 INFO L85 PathProgramCache]: Analyzing trace with hash 238980882, now seen corresponding path program 2 times [2024-06-27 20:17:10,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:10,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699264416] [2024-06-27 20:17:10,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:10,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:10,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:11,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:11,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:11,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699264416] [2024-06-27 20:17:11,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699264416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:11,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:11,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:11,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732800908] [2024-06-27 20:17:11,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:11,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:11,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:11,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:11,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:11,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:17:11,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 367 transitions, 4305 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:11,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:11,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:17:11,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:12,735 INFO L124 PetriNetUnfolderBase]: 3058/4731 cut-off events. [2024-06-27 20:17:12,736 INFO L125 PetriNetUnfolderBase]: For 658186/658192 co-relation queries the response was YES. [2024-06-27 20:17:12,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47248 conditions, 4731 events. 3058/4731 cut-off events. For 658186/658192 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 26159 event pairs, 606 based on Foata normal form. 6/4736 useless extension candidates. Maximal degree in co-relation 47122. Up to 4292 conditions per place. [2024-06-27 20:17:12,791 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 323 selfloop transitions, 76 changer transitions 0/403 dead transitions. [2024-06-27 20:17:12,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 403 transitions, 5979 flow [2024-06-27 20:17:12,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:17:12,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:17:12,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-27 20:17:12,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-27 20:17:12,792 INFO L175 Difference]: Start difference. First operand has 258 places, 367 transitions, 4305 flow. Second operand 9 states and 148 transitions. [2024-06-27 20:17:12,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 403 transitions, 5979 flow [2024-06-27 20:17:13,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 403 transitions, 5767 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-27 20:17:13,567 INFO L231 Difference]: Finished difference. Result has 263 places, 381 transitions, 4738 flow [2024-06-27 20:17:13,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4093, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4738, PETRI_PLACES=263, PETRI_TRANSITIONS=381} [2024-06-27 20:17:13,568 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-27 20:17:13,568 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 381 transitions, 4738 flow [2024-06-27 20:17:13,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:13,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:13,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:13,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 20:17:13,568 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)] === [2024-06-27 20:17:13,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:13,569 INFO L85 PathProgramCache]: Analyzing trace with hash 238634922, now seen corresponding path program 3 times [2024-06-27 20:17:13,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:13,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188041284] [2024-06-27 20:17:13,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:13,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:13,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:14,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:14,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:14,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188041284] [2024-06-27 20:17:14,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188041284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:14,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:14,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:14,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279059929] [2024-06-27 20:17:14,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:14,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:14,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:14,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:14,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:14,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:17:14,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 381 transitions, 4738 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:14,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:14,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:17:14,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:15,351 INFO L124 PetriNetUnfolderBase]: 3070/4749 cut-off events. [2024-06-27 20:17:15,351 INFO L125 PetriNetUnfolderBase]: For 679877/679883 co-relation queries the response was YES. [2024-06-27 20:17:15,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48057 conditions, 4749 events. 3070/4749 cut-off events. For 679877/679883 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 26275 event pairs, 617 based on Foata normal form. 8/4756 useless extension candidates. Maximal degree in co-relation 47928. Up to 4407 conditions per place. [2024-06-27 20:17:15,415 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 347 selfloop transitions, 55 changer transitions 0/406 dead transitions. [2024-06-27 20:17:15,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 406 transitions, 5831 flow [2024-06-27 20:17:15,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:17:15,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:17:15,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-27 20:17:15,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-27 20:17:15,416 INFO L175 Difference]: Start difference. First operand has 263 places, 381 transitions, 4738 flow. Second operand 9 states and 144 transitions. [2024-06-27 20:17:15,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 406 transitions, 5831 flow [2024-06-27 20:17:16,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 406 transitions, 5557 flow, removed 111 selfloop flow, removed 4 redundant places. [2024-06-27 20:17:16,529 INFO L231 Difference]: Finished difference. Result has 268 places, 387 transitions, 4809 flow [2024-06-27 20:17:16,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4488, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4809, PETRI_PLACES=268, PETRI_TRANSITIONS=387} [2024-06-27 20:17:16,530 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 226 predicate places. [2024-06-27 20:17:16,530 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 387 transitions, 4809 flow [2024-06-27 20:17:16,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:16,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:16,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:16,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 20:17:16,531 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)] === [2024-06-27 20:17:16,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:16,531 INFO L85 PathProgramCache]: Analyzing trace with hash -160873446, now seen corresponding path program 1 times [2024-06-27 20:17:16,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:16,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134383078] [2024-06-27 20:17:16,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:16,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:16,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:17,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:17,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:17,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134383078] [2024-06-27 20:17:17,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134383078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:17,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:17,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:17,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261506768] [2024-06-27 20:17:17,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:17,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:17,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:17,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:17,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:17,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:17:17,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 387 transitions, 4809 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:17,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:17,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:17:17,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:18,770 INFO L124 PetriNetUnfolderBase]: 3075/4762 cut-off events. [2024-06-27 20:17:18,770 INFO L125 PetriNetUnfolderBase]: For 684560/684566 co-relation queries the response was YES. [2024-06-27 20:17:18,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48533 conditions, 4762 events. 3075/4762 cut-off events. For 684560/684566 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 26344 event pairs, 625 based on Foata normal form. 7/4768 useless extension candidates. Maximal degree in co-relation 48402. Up to 4585 conditions per place. [2024-06-27 20:17:18,838 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 383 selfloop transitions, 22 changer transitions 0/409 dead transitions. [2024-06-27 20:17:18,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 409 transitions, 5771 flow [2024-06-27 20:17:18,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:17:18,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:17:18,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-27 20:17:18,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-27 20:17:18,840 INFO L175 Difference]: Start difference. First operand has 268 places, 387 transitions, 4809 flow. Second operand 9 states and 135 transitions. [2024-06-27 20:17:18,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 409 transitions, 5771 flow [2024-06-27 20:17:19,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 409 transitions, 5502 flow, removed 83 selfloop flow, removed 7 redundant places. [2024-06-27 20:17:19,881 INFO L231 Difference]: Finished difference. Result has 270 places, 390 transitions, 4688 flow [2024-06-27 20:17:19,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4540, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4688, PETRI_PLACES=270, PETRI_TRANSITIONS=390} [2024-06-27 20:17:19,881 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 228 predicate places. [2024-06-27 20:17:19,881 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 390 transitions, 4688 flow [2024-06-27 20:17:19,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:19,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:19,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:19,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 20:17:19,882 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)] === [2024-06-27 20:17:19,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:19,882 INFO L85 PathProgramCache]: Analyzing trace with hash 238992972, now seen corresponding path program 4 times [2024-06-27 20:17:19,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:19,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218333757] [2024-06-27 20:17:19,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:19,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:19,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:20,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:20,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:20,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218333757] [2024-06-27 20:17:20,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218333757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:20,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:20,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:20,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253488126] [2024-06-27 20:17:20,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:20,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:20,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:20,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:20,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:20,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:17:20,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 390 transitions, 4688 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:20,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:20,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:17:20,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:21,721 INFO L124 PetriNetUnfolderBase]: 3071/4750 cut-off events. [2024-06-27 20:17:21,721 INFO L125 PetriNetUnfolderBase]: For 686440/686446 co-relation queries the response was YES. [2024-06-27 20:17:21,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48076 conditions, 4750 events. 3071/4750 cut-off events. For 686440/686446 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 26188 event pairs, 612 based on Foata normal form. 6/4755 useless extension candidates. Maximal degree in co-relation 47944. Up to 4315 conditions per place. [2024-06-27 20:17:21,787 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 330 selfloop transitions, 78 changer transitions 0/412 dead transitions. [2024-06-27 20:17:21,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 412 transitions, 5918 flow [2024-06-27 20:17:21,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:17:21,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:17:21,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-27 20:17:21,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-27 20:17:21,788 INFO L175 Difference]: Start difference. First operand has 270 places, 390 transitions, 4688 flow. Second operand 9 states and 147 transitions. [2024-06-27 20:17:21,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 412 transitions, 5918 flow [2024-06-27 20:17:22,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 412 transitions, 5696 flow, removed 91 selfloop flow, removed 7 redundant places. [2024-06-27 20:17:22,947 INFO L231 Difference]: Finished difference. Result has 272 places, 390 transitions, 4630 flow [2024-06-27 20:17:22,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4466, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4630, PETRI_PLACES=272, PETRI_TRANSITIONS=390} [2024-06-27 20:17:22,948 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-27 20:17:22,948 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 390 transitions, 4630 flow [2024-06-27 20:17:22,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:22,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:22,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:22,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 20:17:22,948 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)] === [2024-06-27 20:17:22,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:22,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1913723294, now seen corresponding path program 4 times [2024-06-27 20:17:22,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:22,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658135028] [2024-06-27 20:17:22,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:22,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:22,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:23,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:23,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:23,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658135028] [2024-06-27 20:17:23,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658135028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:23,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:23,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:23,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241958180] [2024-06-27 20:17:23,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:23,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:23,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:23,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:23,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:23,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:17:23,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 390 transitions, 4630 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:23,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:23,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:17:23,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:24,550 INFO L124 PetriNetUnfolderBase]: 3081/4747 cut-off events. [2024-06-27 20:17:24,550 INFO L125 PetriNetUnfolderBase]: For 703257/703263 co-relation queries the response was YES. [2024-06-27 20:17:24,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48472 conditions, 4747 events. 3081/4747 cut-off events. For 703257/703263 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 26041 event pairs, 635 based on Foata normal form. 3/4740 useless extension candidates. Maximal degree in co-relation 48339. Up to 4177 conditions per place. [2024-06-27 20:17:24,615 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 330 selfloop transitions, 87 changer transitions 0/421 dead transitions. [2024-06-27 20:17:24,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 421 transitions, 5682 flow [2024-06-27 20:17:24,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:24,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:24,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 20:17:24,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-27 20:17:24,616 INFO L175 Difference]: Start difference. First operand has 272 places, 390 transitions, 4630 flow. Second operand 8 states and 138 transitions. [2024-06-27 20:17:24,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 421 transitions, 5682 flow [2024-06-27 20:17:25,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 421 transitions, 5527 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 20:17:25,836 INFO L231 Difference]: Finished difference. Result has 274 places, 397 transitions, 4799 flow [2024-06-27 20:17:25,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4475, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4799, PETRI_PLACES=274, PETRI_TRANSITIONS=397} [2024-06-27 20:17:25,836 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 232 predicate places. [2024-06-27 20:17:25,836 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 397 transitions, 4799 flow [2024-06-27 20:17:25,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:25,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:25,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:25,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 20:17:25,845 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)] === [2024-06-27 20:17:25,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:25,845 INFO L85 PathProgramCache]: Analyzing trace with hash 227254942, now seen corresponding path program 4 times [2024-06-27 20:17:25,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:25,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702816878] [2024-06-27 20:17:25,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:25,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:25,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:26,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:26,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:26,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702816878] [2024-06-27 20:17:26,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702816878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:26,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:26,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:26,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612131141] [2024-06-27 20:17:26,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:26,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:26,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:26,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:26,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:26,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:17:26,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 397 transitions, 4799 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:26,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:26,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:17:26,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:27,547 INFO L124 PetriNetUnfolderBase]: 3074/4751 cut-off events. [2024-06-27 20:17:27,547 INFO L125 PetriNetUnfolderBase]: For 712963/712969 co-relation queries the response was YES. [2024-06-27 20:17:27,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49010 conditions, 4751 events. 3074/4751 cut-off events. For 712963/712969 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 26187 event pairs, 613 based on Foata normal form. 2/4749 useless extension candidates. Maximal degree in co-relation 48875. Up to 4475 conditions per place. [2024-06-27 20:17:27,610 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 374 selfloop transitions, 38 changer transitions 0/416 dead transitions. [2024-06-27 20:17:27,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 416 transitions, 5687 flow [2024-06-27 20:17:27,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:27,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:27,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 20:17:27,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-27 20:17:27,611 INFO L175 Difference]: Start difference. First operand has 274 places, 397 transitions, 4799 flow. Second operand 8 states and 128 transitions. [2024-06-27 20:17:27,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 416 transitions, 5687 flow [2024-06-27 20:17:28,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 416 transitions, 5421 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-06-27 20:17:28,862 INFO L231 Difference]: Finished difference. Result has 278 places, 397 transitions, 4615 flow [2024-06-27 20:17:28,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4533, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4615, PETRI_PLACES=278, PETRI_TRANSITIONS=397} [2024-06-27 20:17:28,863 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 236 predicate places. [2024-06-27 20:17:28,863 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 397 transitions, 4615 flow [2024-06-27 20:17:28,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:28,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:28,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:28,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 20:17:28,868 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)] === [2024-06-27 20:17:28,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:28,868 INFO L85 PathProgramCache]: Analyzing trace with hash -987856320, now seen corresponding path program 5 times [2024-06-27 20:17:28,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:28,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046339062] [2024-06-27 20:17:28,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:28,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:28,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:29,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:29,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:29,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046339062] [2024-06-27 20:17:29,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046339062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:29,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:29,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:29,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734218443] [2024-06-27 20:17:29,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:29,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:29,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:29,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:29,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:29,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:17:29,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 397 transitions, 4615 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:29,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:29,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:17:29,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:30,560 INFO L124 PetriNetUnfolderBase]: 3084/4752 cut-off events. [2024-06-27 20:17:30,560 INFO L125 PetriNetUnfolderBase]: For 731252/731258 co-relation queries the response was YES. [2024-06-27 20:17:30,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48964 conditions, 4752 events. 3084/4752 cut-off events. For 731252/731258 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 26116 event pairs, 629 based on Foata normal form. 3/4745 useless extension candidates. Maximal degree in co-relation 48828. Up to 4181 conditions per place. [2024-06-27 20:17:30,625 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 330 selfloop transitions, 94 changer transitions 0/428 dead transitions. [2024-06-27 20:17:30,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 428 transitions, 5694 flow [2024-06-27 20:17:30,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:30,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:30,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 20:17:30,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-27 20:17:30,627 INFO L175 Difference]: Start difference. First operand has 278 places, 397 transitions, 4615 flow. Second operand 8 states and 137 transitions. [2024-06-27 20:17:30,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 428 transitions, 5694 flow [2024-06-27 20:17:31,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 428 transitions, 5535 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-27 20:17:31,960 INFO L231 Difference]: Finished difference. Result has 279 places, 404 transitions, 4805 flow [2024-06-27 20:17:31,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4456, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4805, PETRI_PLACES=279, PETRI_TRANSITIONS=404} [2024-06-27 20:17:31,960 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-27 20:17:31,961 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 404 transitions, 4805 flow [2024-06-27 20:17:31,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:31,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:31,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:31,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 20:17:31,961 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)] === [2024-06-27 20:17:31,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:31,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1274476478, now seen corresponding path program 6 times [2024-06-27 20:17:31,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:31,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364986714] [2024-06-27 20:17:31,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:31,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:31,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:32,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:32,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:32,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364986714] [2024-06-27 20:17:32,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364986714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:32,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:32,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:32,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394369946] [2024-06-27 20:17:32,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:32,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:32,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:32,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:32,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:32,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:17:32,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 404 transitions, 4805 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:32,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:32,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:17:32,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:33,528 INFO L124 PetriNetUnfolderBase]: 3094/4760 cut-off events. [2024-06-27 20:17:33,528 INFO L125 PetriNetUnfolderBase]: For 750967/750973 co-relation queries the response was YES. [2024-06-27 20:17:33,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50001 conditions, 4760 events. 3094/4760 cut-off events. For 750967/750973 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 26149 event pairs, 629 based on Foata normal form. 3/4754 useless extension candidates. Maximal degree in co-relation 49863. Up to 4153 conditions per place. [2024-06-27 20:17:33,594 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 319 selfloop transitions, 106 changer transitions 0/429 dead transitions. [2024-06-27 20:17:33,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 429 transitions, 5859 flow [2024-06-27 20:17:33,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:33,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:33,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 20:17:33,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-27 20:17:33,596 INFO L175 Difference]: Start difference. First operand has 279 places, 404 transitions, 4805 flow. Second operand 8 states and 137 transitions. [2024-06-27 20:17:33,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 429 transitions, 5859 flow [2024-06-27 20:17:34,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 429 transitions, 5629 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-27 20:17:35,048 INFO L231 Difference]: Finished difference. Result has 283 places, 407 transitions, 4911 flow [2024-06-27 20:17:35,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4575, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4911, PETRI_PLACES=283, PETRI_TRANSITIONS=407} [2024-06-27 20:17:35,048 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 241 predicate places. [2024-06-27 20:17:35,049 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 407 transitions, 4911 flow [2024-06-27 20:17:35,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:35,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:35,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:35,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 20:17:35,049 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)] === [2024-06-27 20:17:35,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:35,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1513685498, now seen corresponding path program 7 times [2024-06-27 20:17:35,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:35,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83718803] [2024-06-27 20:17:35,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:35,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:35,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:35,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:35,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83718803] [2024-06-27 20:17:35,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83718803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:35,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:35,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:35,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582272807] [2024-06-27 20:17:35,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:35,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:35,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:35,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:35,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:35,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:17:35,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 407 transitions, 4911 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:35,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:35,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:17:35,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:36,583 INFO L124 PetriNetUnfolderBase]: 3096/4768 cut-off events. [2024-06-27 20:17:36,583 INFO L125 PetriNetUnfolderBase]: For 764541/764547 co-relation queries the response was YES. [2024-06-27 20:17:36,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50421 conditions, 4768 events. 3096/4768 cut-off events. For 764541/764547 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 26151 event pairs, 642 based on Foata normal form. 3/4761 useless extension candidates. Maximal degree in co-relation 50282. Up to 4169 conditions per place. [2024-06-27 20:17:36,652 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 331 selfloop transitions, 100 changer transitions 0/435 dead transitions. [2024-06-27 20:17:36,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 435 transitions, 6267 flow [2024-06-27 20:17:36,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:36,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:36,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 20:17:36,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-27 20:17:36,653 INFO L175 Difference]: Start difference. First operand has 283 places, 407 transitions, 4911 flow. Second operand 8 states and 138 transitions. [2024-06-27 20:17:36,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 435 transitions, 6267 flow [2024-06-27 20:17:38,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 435 transitions, 5953 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-27 20:17:38,126 INFO L231 Difference]: Finished difference. Result has 285 places, 413 transitions, 5033 flow [2024-06-27 20:17:38,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4597, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5033, PETRI_PLACES=285, PETRI_TRANSITIONS=413} [2024-06-27 20:17:38,127 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 243 predicate places. [2024-06-27 20:17:38,127 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 413 transitions, 5033 flow [2024-06-27 20:17:38,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:38,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:38,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:38,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 20:17:38,127 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)] === [2024-06-27 20:17:38,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:38,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1159422458, now seen corresponding path program 8 times [2024-06-27 20:17:38,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:38,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130203964] [2024-06-27 20:17:38,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:38,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:38,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:38,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:38,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:38,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130203964] [2024-06-27 20:17:38,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130203964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:38,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:38,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:38,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147110166] [2024-06-27 20:17:38,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:38,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:38,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:38,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:38,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:38,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:17:38,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 413 transitions, 5033 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:38,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:38,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:17:38,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:39,795 INFO L124 PetriNetUnfolderBase]: 3122/4799 cut-off events. [2024-06-27 20:17:39,795 INFO L125 PetriNetUnfolderBase]: For 794647/794653 co-relation queries the response was YES. [2024-06-27 20:17:39,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51211 conditions, 4799 events. 3122/4799 cut-off events. For 794647/794653 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 26277 event pairs, 634 based on Foata normal form. 3/4793 useless extension candidates. Maximal degree in co-relation 51071. Up to 4095 conditions per place. [2024-06-27 20:17:39,857 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 302 selfloop transitions, 134 changer transitions 0/440 dead transitions. [2024-06-27 20:17:39,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 440 transitions, 6599 flow [2024-06-27 20:17:39,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:39,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:39,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 20:17:39,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-27 20:17:39,858 INFO L175 Difference]: Start difference. First operand has 285 places, 413 transitions, 5033 flow. Second operand 8 states and 138 transitions. [2024-06-27 20:17:39,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 440 transitions, 6599 flow [2024-06-27 20:17:41,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 440 transitions, 6372 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-27 20:17:41,388 INFO L231 Difference]: Finished difference. Result has 289 places, 419 transitions, 5326 flow [2024-06-27 20:17:41,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4806, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5326, PETRI_PLACES=289, PETRI_TRANSITIONS=419} [2024-06-27 20:17:41,388 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-27 20:17:41,388 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 419 transitions, 5326 flow [2024-06-27 20:17:41,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:41,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:41,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:41,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 20:17:41,389 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)] === [2024-06-27 20:17:41,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:41,389 INFO L85 PathProgramCache]: Analyzing trace with hash -861374274, now seen corresponding path program 5 times [2024-06-27 20:17:41,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:41,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706808645] [2024-06-27 20:17:41,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:41,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:41,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:42,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:42,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:42,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706808645] [2024-06-27 20:17:42,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706808645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:42,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:42,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:42,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904825137] [2024-06-27 20:17:42,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:42,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:42,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:42,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:42,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:42,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:17:42,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 419 transitions, 5326 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:42,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:42,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:17:42,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:43,224 INFO L124 PetriNetUnfolderBase]: 3127/4825 cut-off events. [2024-06-27 20:17:43,225 INFO L125 PetriNetUnfolderBase]: For 807204/807210 co-relation queries the response was YES. [2024-06-27 20:17:43,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52064 conditions, 4825 events. 3127/4825 cut-off events. For 807204/807210 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 26607 event pairs, 610 based on Foata normal form. 2/4823 useless extension candidates. Maximal degree in co-relation 51922. Up to 4529 conditions per place. [2024-06-27 20:17:43,296 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 387 selfloop transitions, 47 changer transitions 0/438 dead transitions. [2024-06-27 20:17:43,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 438 transitions, 6320 flow [2024-06-27 20:17:43,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:43,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:43,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 20:17:43,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-27 20:17:43,298 INFO L175 Difference]: Start difference. First operand has 289 places, 419 transitions, 5326 flow. Second operand 8 states and 127 transitions. [2024-06-27 20:17:43,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 438 transitions, 6320 flow [2024-06-27 20:17:44,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 438 transitions, 6011 flow, removed 74 selfloop flow, removed 4 redundant places. [2024-06-27 20:17:44,698 INFO L231 Difference]: Finished difference. Result has 293 places, 422 transitions, 5197 flow [2024-06-27 20:17:44,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5017, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5197, PETRI_PLACES=293, PETRI_TRANSITIONS=422} [2024-06-27 20:17:44,699 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 251 predicate places. [2024-06-27 20:17:44,699 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 422 transitions, 5197 flow [2024-06-27 20:17:44,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:44,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:44,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:44,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 20:17:44,700 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)] === [2024-06-27 20:17:44,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:44,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1815376364, now seen corresponding path program 6 times [2024-06-27 20:17:44,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:44,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803420452] [2024-06-27 20:17:44,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:44,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:44,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:45,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:45,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:45,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803420452] [2024-06-27 20:17:45,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803420452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:45,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:45,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:45,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76145941] [2024-06-27 20:17:45,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:45,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:45,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:45,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:45,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:45,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:17:45,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 422 transitions, 5197 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:45,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:45,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:17:45,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:46,492 INFO L124 PetriNetUnfolderBase]: 3132/4830 cut-off events. [2024-06-27 20:17:46,493 INFO L125 PetriNetUnfolderBase]: For 819819/819825 co-relation queries the response was YES. [2024-06-27 20:17:46,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52082 conditions, 4830 events. 3132/4830 cut-off events. For 819819/819825 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 26584 event pairs, 612 based on Foata normal form. 2/4828 useless extension candidates. Maximal degree in co-relation 51938. Up to 4521 conditions per place. [2024-06-27 20:17:46,562 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 379 selfloop transitions, 59 changer transitions 0/442 dead transitions. [2024-06-27 20:17:46,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 442 transitions, 6208 flow [2024-06-27 20:17:46,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:46,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:46,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 20:17:46,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-27 20:17:46,576 INFO L175 Difference]: Start difference. First operand has 293 places, 422 transitions, 5197 flow. Second operand 8 states and 129 transitions. [2024-06-27 20:17:46,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 442 transitions, 6208 flow [2024-06-27 20:17:47,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 442 transitions, 6066 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 20:17:47,896 INFO L231 Difference]: Finished difference. Result has 296 places, 426 transitions, 5287 flow [2024-06-27 20:17:47,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5055, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5287, PETRI_PLACES=296, PETRI_TRANSITIONS=426} [2024-06-27 20:17:47,897 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-27 20:17:47,897 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 426 transitions, 5287 flow [2024-06-27 20:17:47,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:47,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:47,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:47,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 20:17:47,898 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)] === [2024-06-27 20:17:47,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:47,898 INFO L85 PathProgramCache]: Analyzing trace with hash -861367950, now seen corresponding path program 9 times [2024-06-27 20:17:47,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:47,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524858689] [2024-06-27 20:17:47,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:47,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:47,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:48,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:48,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:48,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524858689] [2024-06-27 20:17:48,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524858689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:48,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:48,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:48,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253934754] [2024-06-27 20:17:48,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:48,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:48,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:48,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:48,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:48,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:17:48,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 426 transitions, 5287 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:48,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:48,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:17:48,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:49,545 INFO L124 PetriNetUnfolderBase]: 3134/4820 cut-off events. [2024-06-27 20:17:49,545 INFO L125 PetriNetUnfolderBase]: For 837285/837291 co-relation queries the response was YES. [2024-06-27 20:17:49,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52242 conditions, 4820 events. 3134/4820 cut-off events. For 837285/837291 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 26463 event pairs, 632 based on Foata normal form. 3/4813 useless extension candidates. Maximal degree in co-relation 52096. Up to 4113 conditions per place. [2024-06-27 20:17:49,617 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 308 selfloop transitions, 137 changer transitions 0/449 dead transitions. [2024-06-27 20:17:49,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 449 transitions, 6545 flow [2024-06-27 20:17:49,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:49,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:49,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 20:17:49,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-27 20:17:49,619 INFO L175 Difference]: Start difference. First operand has 296 places, 426 transitions, 5287 flow. Second operand 8 states and 138 transitions. [2024-06-27 20:17:49,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 449 transitions, 6545 flow [2024-06-27 20:17:51,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 449 transitions, 6390 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 20:17:51,347 INFO L231 Difference]: Finished difference. Result has 299 places, 429 transitions, 5504 flow [2024-06-27 20:17:51,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5132, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5504, PETRI_PLACES=299, PETRI_TRANSITIONS=429} [2024-06-27 20:17:51,347 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 257 predicate places. [2024-06-27 20:17:51,347 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 429 transitions, 5504 flow [2024-06-27 20:17:51,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:51,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:51,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:51,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 20:17:51,348 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)] === [2024-06-27 20:17:51,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:51,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1040888914, now seen corresponding path program 7 times [2024-06-27 20:17:51,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:51,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513714720] [2024-06-27 20:17:51,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:51,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:51,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:52,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:52,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:52,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513714720] [2024-06-27 20:17:52,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513714720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:52,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:52,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:52,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826219741] [2024-06-27 20:17:52,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:52,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:52,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:52,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:52,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:52,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:17:52,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 429 transitions, 5504 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:52,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:52,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:17:52,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:53,365 INFO L124 PetriNetUnfolderBase]: 3136/4834 cut-off events. [2024-06-27 20:17:53,365 INFO L125 PetriNetUnfolderBase]: For 850524/850534 co-relation queries the response was YES. [2024-06-27 20:17:53,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52703 conditions, 4834 events. 3136/4834 cut-off events. For 850524/850534 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 26582 event pairs, 646 based on Foata normal form. 7/4839 useless extension candidates. Maximal degree in co-relation 52556. Up to 4354 conditions per place. [2024-06-27 20:17:53,429 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 331 selfloop transitions, 111 changer transitions 0/446 dead transitions. [2024-06-27 20:17:53,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 446 transitions, 6878 flow [2024-06-27 20:17:53,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:53,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:53,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 20:17:53,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-27 20:17:53,431 INFO L175 Difference]: Start difference. First operand has 299 places, 429 transitions, 5504 flow. Second operand 8 states and 131 transitions. [2024-06-27 20:17:53,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 446 transitions, 6878 flow [2024-06-27 20:17:55,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 446 transitions, 6589 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-27 20:17:55,078 INFO L231 Difference]: Finished difference. Result has 302 places, 432 transitions, 5517 flow [2024-06-27 20:17:55,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5215, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5517, PETRI_PLACES=302, PETRI_TRANSITIONS=432} [2024-06-27 20:17:55,078 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-27 20:17:55,079 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 432 transitions, 5517 flow [2024-06-27 20:17:55,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:55,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:55,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:55,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 20:17:55,079 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)] === [2024-06-27 20:17:55,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:55,079 INFO L85 PathProgramCache]: Analyzing trace with hash -689063320, now seen corresponding path program 8 times [2024-06-27 20:17:55,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:55,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75061916] [2024-06-27 20:17:55,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:55,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:55,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:55,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:55,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:55,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75061916] [2024-06-27 20:17:55,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75061916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:55,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:55,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:55,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448008007] [2024-06-27 20:17:55,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:55,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:55,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:55,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:55,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:56,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:17:56,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 432 transitions, 5517 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:56,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:56,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:17:56,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:57,033 INFO L124 PetriNetUnfolderBase]: 3157/4873 cut-off events. [2024-06-27 20:17:57,034 INFO L125 PetriNetUnfolderBase]: For 870906/870916 co-relation queries the response was YES. [2024-06-27 20:17:57,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53172 conditions, 4873 events. 3157/4873 cut-off events. For 870906/870916 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 26901 event pairs, 635 based on Foata normal form. 6/4877 useless extension candidates. Maximal degree in co-relation 53024. Up to 4373 conditions per place. [2024-06-27 20:17:57,102 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 325 selfloop transitions, 125 changer transitions 0/454 dead transitions. [2024-06-27 20:17:57,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 454 transitions, 7042 flow [2024-06-27 20:17:57,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:57,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:57,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 20:17:57,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-27 20:17:57,104 INFO L175 Difference]: Start difference. First operand has 302 places, 432 transitions, 5517 flow. Second operand 8 states and 130 transitions. [2024-06-27 20:17:57,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 454 transitions, 7042 flow [2024-06-27 20:17:58,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 454 transitions, 6771 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-27 20:17:58,716 INFO L231 Difference]: Finished difference. Result has 306 places, 440 transitions, 5732 flow [2024-06-27 20:17:58,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5256, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5732, PETRI_PLACES=306, PETRI_TRANSITIONS=440} [2024-06-27 20:17:58,717 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-27 20:17:58,717 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 440 transitions, 5732 flow [2024-06-27 20:17:58,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:58,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:58,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:58,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 20:17:58,717 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)] === [2024-06-27 20:17:58,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:58,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1029039784, now seen corresponding path program 9 times [2024-06-27 20:17:58,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:58,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65594408] [2024-06-27 20:17:58,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:58,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:58,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:59,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:59,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:59,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65594408] [2024-06-27 20:17:59,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65594408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:59,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:59,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:59,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511060133] [2024-06-27 20:17:59,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:59,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:59,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:59,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:59,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:59,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:17:59,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 440 transitions, 5732 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:59,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:59,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:17:59,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:00,505 INFO L124 PetriNetUnfolderBase]: 3151/4861 cut-off events. [2024-06-27 20:18:00,506 INFO L125 PetriNetUnfolderBase]: For 882490/882500 co-relation queries the response was YES. [2024-06-27 20:18:00,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53058 conditions, 4861 events. 3151/4861 cut-off events. For 882490/882500 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 26798 event pairs, 635 based on Foata normal form. 7/4866 useless extension candidates. Maximal degree in co-relation 52908. Up to 4464 conditions per place. [2024-06-27 20:18:00,574 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 373 selfloop transitions, 76 changer transitions 0/453 dead transitions. [2024-06-27 20:18:00,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 453 transitions, 6862 flow [2024-06-27 20:18:00,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:18:00,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:18:00,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 20:18:00,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-27 20:18:00,576 INFO L175 Difference]: Start difference. First operand has 306 places, 440 transitions, 5732 flow. Second operand 8 states and 129 transitions. [2024-06-27 20:18:00,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 453 transitions, 6862 flow [2024-06-27 20:18:02,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 453 transitions, 6578 flow, removed 67 selfloop flow, removed 4 redundant places. [2024-06-27 20:18:02,225 INFO L231 Difference]: Finished difference. Result has 310 places, 440 transitions, 5609 flow [2024-06-27 20:18:02,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5448, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5609, PETRI_PLACES=310, PETRI_TRANSITIONS=440} [2024-06-27 20:18:02,226 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 268 predicate places. [2024-06-27 20:18:02,226 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 440 transitions, 5609 flow [2024-06-27 20:18:02,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:02,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:02,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:02,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 20:18:02,226 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)] === [2024-06-27 20:18:02,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:02,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1383112384, now seen corresponding path program 10 times [2024-06-27 20:18:02,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:02,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674205416] [2024-06-27 20:18:02,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:02,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:02,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:03,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:03,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:03,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674205416] [2024-06-27 20:18:03,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674205416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:03,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:03,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:18:03,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488290547] [2024-06-27 20:18:03,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:03,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:18:03,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:03,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:18:03,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:18:03,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:18:03,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 440 transitions, 5609 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:03,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:03,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:18:03,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:04,024 INFO L124 PetriNetUnfolderBase]: 3153/4866 cut-off events. [2024-06-27 20:18:04,024 INFO L125 PetriNetUnfolderBase]: For 893717/893727 co-relation queries the response was YES. [2024-06-27 20:18:04,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52975 conditions, 4866 events. 3153/4866 cut-off events. For 893717/893727 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 26840 event pairs, 638 based on Foata normal form. 7/4871 useless extension candidates. Maximal degree in co-relation 52824. Up to 4502 conditions per place. [2024-06-27 20:18:04,094 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 387 selfloop transitions, 64 changer transitions 0/455 dead transitions. [2024-06-27 20:18:04,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 455 transitions, 6635 flow [2024-06-27 20:18:04,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:18:04,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:18:04,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 20:18:04,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-27 20:18:04,096 INFO L175 Difference]: Start difference. First operand has 310 places, 440 transitions, 5609 flow. Second operand 8 states and 127 transitions. [2024-06-27 20:18:04,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 455 transitions, 6635 flow [2024-06-27 20:18:05,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 455 transitions, 6509 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 20:18:05,880 INFO L231 Difference]: Finished difference. Result has 313 places, 443 transitions, 5712 flow [2024-06-27 20:18:05,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5485, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5712, PETRI_PLACES=313, PETRI_TRANSITIONS=443} [2024-06-27 20:18:05,883 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-27 20:18:05,883 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 443 transitions, 5712 flow [2024-06-27 20:18:05,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:05,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:05,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:05,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 20:18:05,884 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)] === [2024-06-27 20:18:05,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:05,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1560243718, now seen corresponding path program 10 times [2024-06-27 20:18:05,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:05,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222005071] [2024-06-27 20:18:05,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:05,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:05,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:06,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:06,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:06,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222005071] [2024-06-27 20:18:06,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222005071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:06,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:06,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:18:06,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480739390] [2024-06-27 20:18:06,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:06,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:18:06,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:06,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:18:06,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:18:06,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:18:06,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 443 transitions, 5712 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:06,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:06,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:18:06,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:07,624 INFO L124 PetriNetUnfolderBase]: 3195/4928 cut-off events. [2024-06-27 20:18:07,624 INFO L125 PetriNetUnfolderBase]: For 936479/936487 co-relation queries the response was YES. [2024-06-27 20:18:07,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54455 conditions, 4928 events. 3195/4928 cut-off events. For 936479/936487 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 27194 event pairs, 714 based on Foata normal form. 3/4929 useless extension candidates. Maximal degree in co-relation 54303. Up to 3979 conditions per place. [2024-06-27 20:18:07,700 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 320 selfloop transitions, 151 changer transitions 0/475 dead transitions. [2024-06-27 20:18:07,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 475 transitions, 7836 flow [2024-06-27 20:18:07,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:18:07,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:18:07,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 20:18:07,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-27 20:18:07,702 INFO L175 Difference]: Start difference. First operand has 313 places, 443 transitions, 5712 flow. Second operand 8 states and 137 transitions. [2024-06-27 20:18:07,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 475 transitions, 7836 flow [2024-06-27 20:18:09,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 475 transitions, 7645 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 20:18:09,188 INFO L231 Difference]: Finished difference. Result has 315 places, 456 transitions, 6339 flow [2024-06-27 20:18:09,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5521, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6339, PETRI_PLACES=315, PETRI_TRANSITIONS=456} [2024-06-27 20:18:09,189 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-27 20:18:09,189 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 456 transitions, 6339 flow [2024-06-27 20:18:09,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:09,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:09,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:09,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 20:18:09,190 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)] === [2024-06-27 20:18:09,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:09,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1383112198, now seen corresponding path program 11 times [2024-06-27 20:18:09,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:09,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801903444] [2024-06-27 20:18:09,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:09,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:09,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:09,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:09,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:09,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801903444] [2024-06-27 20:18:09,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801903444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:09,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:09,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:18:09,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945671641] [2024-06-27 20:18:09,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:09,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:18:09,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:09,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:18:09,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:18:09,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:18:09,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 456 transitions, 6339 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:09,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:09,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:18:09,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:10,924 INFO L124 PetriNetUnfolderBase]: 3183/4910 cut-off events. [2024-06-27 20:18:10,925 INFO L125 PetriNetUnfolderBase]: For 950256/950264 co-relation queries the response was YES. [2024-06-27 20:18:10,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54736 conditions, 4910 events. 3183/4910 cut-off events. For 950256/950264 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 27105 event pairs, 708 based on Foata normal form. 5/4913 useless extension candidates. Maximal degree in co-relation 54583. Up to 3971 conditions per place. [2024-06-27 20:18:11,000 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 322 selfloop transitions, 147 changer transitions 0/473 dead transitions. [2024-06-27 20:18:11,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 473 transitions, 7751 flow [2024-06-27 20:18:11,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:18:11,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:18:11,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 20:18:11,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 20:18:11,001 INFO L175 Difference]: Start difference. First operand has 315 places, 456 transitions, 6339 flow. Second operand 8 states and 136 transitions. [2024-06-27 20:18:11,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 473 transitions, 7751 flow [2024-06-27 20:18:12,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 473 transitions, 7374 flow, removed 155 selfloop flow, removed 2 redundant places. [2024-06-27 20:18:12,913 INFO L231 Difference]: Finished difference. Result has 321 places, 456 transitions, 6263 flow [2024-06-27 20:18:12,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5962, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6263, PETRI_PLACES=321, PETRI_TRANSITIONS=456} [2024-06-27 20:18:12,914 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-27 20:18:12,914 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 456 transitions, 6263 flow [2024-06-27 20:18:12,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:12,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:12,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:12,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 20:18:12,915 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)] === [2024-06-27 20:18:12,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:12,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1560243904, now seen corresponding path program 11 times [2024-06-27 20:18:12,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:12,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188043795] [2024-06-27 20:18:12,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:12,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:12,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:13,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:13,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:13,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188043795] [2024-06-27 20:18:13,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188043795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:13,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:13,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:18:13,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743013754] [2024-06-27 20:18:13,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:13,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:18:13,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:13,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:18:13,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:18:13,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:18:13,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 456 transitions, 6263 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:13,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:13,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:18:13,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:14,821 INFO L124 PetriNetUnfolderBase]: 3178/4900 cut-off events. [2024-06-27 20:18:14,822 INFO L125 PetriNetUnfolderBase]: For 922240/922250 co-relation queries the response was YES. [2024-06-27 20:18:14,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53364 conditions, 4900 events. 3178/4900 cut-off events. For 922240/922250 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 27014 event pairs, 637 based on Foata normal form. 6/4904 useless extension candidates. Maximal degree in co-relation 53209. Up to 4540 conditions per place. [2024-06-27 20:18:14,890 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 397 selfloop transitions, 67 changer transitions 0/468 dead transitions. [2024-06-27 20:18:14,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 468 transitions, 7227 flow [2024-06-27 20:18:14,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:18:14,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:18:14,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-27 20:18:14,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-27 20:18:14,891 INFO L175 Difference]: Start difference. First operand has 321 places, 456 transitions, 6263 flow. Second operand 8 states and 125 transitions. [2024-06-27 20:18:14,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 468 transitions, 7227 flow [2024-06-27 20:18:16,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 468 transitions, 6785 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-27 20:18:16,890 INFO L231 Difference]: Finished difference. Result has 322 places, 456 transitions, 5961 flow [2024-06-27 20:18:16,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5821, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5961, PETRI_PLACES=322, PETRI_TRANSITIONS=456} [2024-06-27 20:18:16,890 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 280 predicate places. [2024-06-27 20:18:16,891 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 456 transitions, 5961 flow [2024-06-27 20:18:16,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:16,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:16,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:16,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 20:18:16,891 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)] === [2024-06-27 20:18:16,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:16,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1560480868, now seen corresponding path program 12 times [2024-06-27 20:18:16,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:16,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133555926] [2024-06-27 20:18:16,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:16,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:16,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:17,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:17,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:17,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133555926] [2024-06-27 20:18:17,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133555926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:17,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:17,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:18:17,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104341385] [2024-06-27 20:18:17,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:17,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:18:17,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:17,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:18:17,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:18:17,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:18:17,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 456 transitions, 5961 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:17,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:17,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:18:17,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:18,559 INFO L124 PetriNetUnfolderBase]: 3172/4894 cut-off events. [2024-06-27 20:18:18,559 INFO L125 PetriNetUnfolderBase]: For 932492/932500 co-relation queries the response was YES. [2024-06-27 20:18:18,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52415 conditions, 4894 events. 3172/4894 cut-off events. For 932492/932500 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 27007 event pairs, 712 based on Foata normal form. 3/4895 useless extension candidates. Maximal degree in co-relation 52260. Up to 3961 conditions per place. [2024-06-27 20:18:18,630 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 315 selfloop transitions, 153 changer transitions 0/472 dead transitions. [2024-06-27 20:18:18,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 472 transitions, 7173 flow [2024-06-27 20:18:18,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:18:18,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:18:18,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 20:18:18,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-27 20:18:18,631 INFO L175 Difference]: Start difference. First operand has 322 places, 456 transitions, 5961 flow. Second operand 8 states and 134 transitions. [2024-06-27 20:18:18,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 472 transitions, 7173 flow [2024-06-27 20:18:20,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 472 transitions, 6870 flow, removed 50 selfloop flow, removed 9 redundant places. [2024-06-27 20:18:20,622 INFO L231 Difference]: Finished difference. Result has 321 places, 456 transitions, 5970 flow [2024-06-27 20:18:20,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5658, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5970, PETRI_PLACES=321, PETRI_TRANSITIONS=456} [2024-06-27 20:18:20,622 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-27 20:18:20,622 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 456 transitions, 5970 flow [2024-06-27 20:18:20,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:20,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:20,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:20,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 20:18:20,623 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)] === [2024-06-27 20:18:20,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:20,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1560659614, now seen corresponding path program 12 times [2024-06-27 20:18:20,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:20,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052221492] [2024-06-27 20:18:20,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:20,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:20,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:21,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:21,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:21,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052221492] [2024-06-27 20:18:21,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052221492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:21,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:21,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:18:21,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206395941] [2024-06-27 20:18:21,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:21,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:18:21,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:21,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:18:21,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:18:21,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:18:21,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 456 transitions, 5970 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:21,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:21,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:18:21,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:22,490 INFO L124 PetriNetUnfolderBase]: 3167/4882 cut-off events. [2024-06-27 20:18:22,490 INFO L125 PetriNetUnfolderBase]: For 938972/938982 co-relation queries the response was YES. [2024-06-27 20:18:22,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52565 conditions, 4882 events. 3167/4882 cut-off events. For 938972/938982 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 26900 event pairs, 636 based on Foata normal form. 6/4886 useless extension candidates. Maximal degree in co-relation 52410. Up to 4507 conditions per place. [2024-06-27 20:18:22,562 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 384 selfloop transitions, 80 changer transitions 0/468 dead transitions. [2024-06-27 20:18:22,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 468 transitions, 6934 flow [2024-06-27 20:18:22,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:18:22,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:18:22,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 20:18:22,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-27 20:18:22,564 INFO L175 Difference]: Start difference. First operand has 321 places, 456 transitions, 5970 flow. Second operand 8 states and 127 transitions. [2024-06-27 20:18:22,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 468 transitions, 6934 flow [2024-06-27 20:18:24,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 468 transitions, 6576 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-27 20:18:24,573 INFO L231 Difference]: Finished difference. Result has 322 places, 456 transitions, 5778 flow [2024-06-27 20:18:24,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5612, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5778, PETRI_PLACES=322, PETRI_TRANSITIONS=456} [2024-06-27 20:18:24,574 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 280 predicate places. [2024-06-27 20:18:24,574 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 456 transitions, 5778 flow [2024-06-27 20:18:24,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:24,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:24,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:24,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 20:18:24,575 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)] === [2024-06-27 20:18:24,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:24,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1382989066, now seen corresponding path program 4 times [2024-06-27 20:18:24,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:24,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694783638] [2024-06-27 20:18:24,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:24,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:24,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:25,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:25,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:25,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694783638] [2024-06-27 20:18:25,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694783638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:25,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:25,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:18:25,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408644889] [2024-06-27 20:18:25,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:25,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:18:25,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:25,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:18:25,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:18:25,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:18:25,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 456 transitions, 5778 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:25,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:25,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:18:25,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:26,382 INFO L124 PetriNetUnfolderBase]: 3170/4889 cut-off events. [2024-06-27 20:18:26,382 INFO L125 PetriNetUnfolderBase]: For 961165/961175 co-relation queries the response was YES. [2024-06-27 20:18:26,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52212 conditions, 4889 events. 3170/4889 cut-off events. For 961165/961175 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 26985 event pairs, 635 based on Foata normal form. 9/4896 useless extension candidates. Maximal degree in co-relation 52056. Up to 4521 conditions per place. [2024-06-27 20:18:26,456 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 403 selfloop transitions, 65 changer transitions 0/472 dead transitions. [2024-06-27 20:18:26,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 472 transitions, 6894 flow [2024-06-27 20:18:26,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:18:26,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:18:26,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 20:18:26,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-27 20:18:26,457 INFO L175 Difference]: Start difference. First operand has 322 places, 456 transitions, 5778 flow. Second operand 8 states and 127 transitions. [2024-06-27 20:18:26,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 472 transitions, 6894 flow [2024-06-27 20:18:28,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 472 transitions, 6582 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-27 20:18:28,478 INFO L231 Difference]: Finished difference. Result has 320 places, 459 transitions, 5750 flow [2024-06-27 20:18:28,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5466, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5750, PETRI_PLACES=320, PETRI_TRANSITIONS=459} [2024-06-27 20:18:28,479 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-27 20:18:28,479 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 459 transitions, 5750 flow [2024-06-27 20:18:28,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:28,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:28,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:28,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 20:18:28,480 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)] === [2024-06-27 20:18:28,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:28,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1796664908, now seen corresponding path program 5 times [2024-06-27 20:18:28,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:28,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198765044] [2024-06-27 20:18:28,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:28,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:28,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:29,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:29,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:29,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198765044] [2024-06-27 20:18:29,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198765044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:29,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:29,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:18:29,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122745896] [2024-06-27 20:18:29,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:29,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:18:29,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:29,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:18:29,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:18:29,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:18:29,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 459 transitions, 5750 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:29,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:29,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:18:29,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:30,555 INFO L124 PetriNetUnfolderBase]: 3226/4980 cut-off events. [2024-06-27 20:18:30,555 INFO L125 PetriNetUnfolderBase]: For 999040/999046 co-relation queries the response was YES. [2024-06-27 20:18:30,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53981 conditions, 4980 events. 3226/4980 cut-off events. For 999040/999046 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 27658 event pairs, 657 based on Foata normal form. 8/4987 useless extension candidates. Maximal degree in co-relation 53826. Up to 4709 conditions per place. [2024-06-27 20:18:30,627 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 429 selfloop transitions, 54 changer transitions 0/487 dead transitions. [2024-06-27 20:18:30,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 487 transitions, 7590 flow [2024-06-27 20:18:30,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:18:30,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:18:30,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-27 20:18:30,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-27 20:18:30,629 INFO L175 Difference]: Start difference. First operand has 320 places, 459 transitions, 5750 flow. Second operand 9 states and 141 transitions. [2024-06-27 20:18:30,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 487 transitions, 7590 flow [2024-06-27 20:18:32,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 487 transitions, 7328 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-06-27 20:18:32,673 INFO L231 Difference]: Finished difference. Result has 325 places, 471 transitions, 6033 flow [2024-06-27 20:18:32,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5488, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6033, PETRI_PLACES=325, PETRI_TRANSITIONS=471} [2024-06-27 20:18:32,674 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 283 predicate places. [2024-06-27 20:18:32,674 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 471 transitions, 6033 flow [2024-06-27 20:18:32,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:32,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:32,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:32,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 20:18:32,675 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)] === [2024-06-27 20:18:32,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:32,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1383358028, now seen corresponding path program 6 times [2024-06-27 20:18:32,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:32,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620036560] [2024-06-27 20:18:32,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:32,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:32,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:33,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:33,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:33,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620036560] [2024-06-27 20:18:33,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620036560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:33,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:33,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:18:33,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237396651] [2024-06-27 20:18:33,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:33,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:18:33,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:33,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:18:33,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:18:33,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:18:33,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 471 transitions, 6033 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:33,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:33,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:18:33,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:34,694 INFO L124 PetriNetUnfolderBase]: 3300/5084 cut-off events. [2024-06-27 20:18:34,694 INFO L125 PetriNetUnfolderBase]: For 1062387/1062397 co-relation queries the response was YES. [2024-06-27 20:18:34,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56640 conditions, 5084 events. 3300/5084 cut-off events. For 1062387/1062397 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 28243 event pairs, 638 based on Foata normal form. 9/5091 useless extension candidates. Maximal degree in co-relation 56482. Up to 4589 conditions per place. [2024-06-27 20:18:34,768 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 407 selfloop transitions, 85 changer transitions 0/496 dead transitions. [2024-06-27 20:18:34,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 496 transitions, 7689 flow [2024-06-27 20:18:34,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:18:34,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:18:34,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-27 20:18:34,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39295392953929537 [2024-06-27 20:18:34,769 INFO L175 Difference]: Start difference. First operand has 325 places, 471 transitions, 6033 flow. Second operand 9 states and 145 transitions. [2024-06-27 20:18:34,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 496 transitions, 7689 flow [2024-06-27 20:18:37,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 496 transitions, 7248 flow, removed 100 selfloop flow, removed 7 redundant places. [2024-06-27 20:18:37,214 INFO L231 Difference]: Finished difference. Result has 328 places, 479 transitions, 6102 flow [2024-06-27 20:18:37,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5592, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6102, PETRI_PLACES=328, PETRI_TRANSITIONS=479} [2024-06-27 20:18:37,215 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 286 predicate places. [2024-06-27 20:18:37,215 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 479 transitions, 6102 flow [2024-06-27 20:18:37,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:37,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:37,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:37,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 20:18:37,216 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)] === [2024-06-27 20:18:37,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:37,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1040885318, now seen corresponding path program 7 times [2024-06-27 20:18:37,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:37,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930401546] [2024-06-27 20:18:37,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:37,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:37,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:38,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:38,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:38,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930401546] [2024-06-27 20:18:38,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930401546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:38,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:38,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:18:38,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462932023] [2024-06-27 20:18:38,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:38,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:18:38,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:38,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:18:38,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:18:38,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:18:38,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 479 transitions, 6102 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:38,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:38,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:18:38,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:39,197 INFO L124 PetriNetUnfolderBase]: 3318/5115 cut-off events. [2024-06-27 20:18:39,197 INFO L125 PetriNetUnfolderBase]: For 1101147/1101157 co-relation queries the response was YES. [2024-06-27 20:18:39,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57061 conditions, 5115 events. 3318/5115 cut-off events. For 1101147/1101157 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 28632 event pairs, 629 based on Foata normal form. 7/5120 useless extension candidates. Maximal degree in co-relation 56903. Up to 4428 conditions per place. [2024-06-27 20:18:39,275 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 375 selfloop transitions, 148 changer transitions 0/527 dead transitions. [2024-06-27 20:18:39,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 527 transitions, 8890 flow [2024-06-27 20:18:39,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:18:39,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:18:39,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-27 20:18:39,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-27 20:18:39,276 INFO L175 Difference]: Start difference. First operand has 328 places, 479 transitions, 6102 flow. Second operand 9 states and 148 transitions. [2024-06-27 20:18:39,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 527 transitions, 8890 flow [2024-06-27 20:18:41,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 527 transitions, 8436 flow, removed 180 selfloop flow, removed 5 redundant places. [2024-06-27 20:18:41,388 INFO L231 Difference]: Finished difference. Result has 335 places, 504 transitions, 7012 flow [2024-06-27 20:18:41,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5816, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7012, PETRI_PLACES=335, PETRI_TRANSITIONS=504} [2024-06-27 20:18:41,388 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 293 predicate places. [2024-06-27 20:18:41,388 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 504 transitions, 7012 flow [2024-06-27 20:18:41,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:41,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:41,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:41,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 20:18:41,389 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)] === [2024-06-27 20:18:41,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:41,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1782855338, now seen corresponding path program 8 times [2024-06-27 20:18:41,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:41,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270062336] [2024-06-27 20:18:41,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:41,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:41,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:42,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:42,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:42,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270062336] [2024-06-27 20:18:42,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270062336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:42,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:42,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:18:42,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535059945] [2024-06-27 20:18:42,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:42,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:18:42,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:42,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:18:42,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:18:42,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:18:42,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 504 transitions, 7012 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:42,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:42,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:18:42,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:43,391 INFO L124 PetriNetUnfolderBase]: 3350/5169 cut-off events. [2024-06-27 20:18:43,392 INFO L125 PetriNetUnfolderBase]: For 1136403/1136413 co-relation queries the response was YES. [2024-06-27 20:18:43,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58786 conditions, 5169 events. 3350/5169 cut-off events. For 1136403/1136413 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 28934 event pairs, 641 based on Foata normal form. 9/5176 useless extension candidates. Maximal degree in co-relation 58623. Up to 4292 conditions per place. [2024-06-27 20:18:43,470 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 356 selfloop transitions, 176 changer transitions 0/536 dead transitions. [2024-06-27 20:18:43,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 536 transitions, 9464 flow [2024-06-27 20:18:43,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:18:43,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:18:43,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 20:18:43,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-27 20:18:43,471 INFO L175 Difference]: Start difference. First operand has 335 places, 504 transitions, 7012 flow. Second operand 9 states and 152 transitions. [2024-06-27 20:18:43,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 536 transitions, 9464 flow [2024-06-27 20:18:45,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 536 transitions, 8956 flow, removed 206 selfloop flow, removed 4 redundant places. [2024-06-27 20:18:45,736 INFO L231 Difference]: Finished difference. Result has 341 places, 515 transitions, 7365 flow [2024-06-27 20:18:45,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6536, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7365, PETRI_PLACES=341, PETRI_TRANSITIONS=515} [2024-06-27 20:18:45,737 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 299 predicate places. [2024-06-27 20:18:45,737 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 515 transitions, 7365 flow [2024-06-27 20:18:45,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:45,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:45,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:45,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 20:18:45,737 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)] === [2024-06-27 20:18:45,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:45,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1383358462, now seen corresponding path program 2 times [2024-06-27 20:18:45,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:45,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817748863] [2024-06-27 20:18:45,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:45,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:45,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:46,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:46,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:46,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817748863] [2024-06-27 20:18:46,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817748863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:46,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:46,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:18:46,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813213565] [2024-06-27 20:18:46,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:46,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:18:46,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:46,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:18:46,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:18:46,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:18:46,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 515 transitions, 7365 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:46,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:46,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:18:46,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:48,071 INFO L124 PetriNetUnfolderBase]: 3345/5168 cut-off events. [2024-06-27 20:18:48,071 INFO L125 PetriNetUnfolderBase]: For 1138935/1138947 co-relation queries the response was YES. [2024-06-27 20:18:48,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58977 conditions, 5168 events. 3345/5168 cut-off events. For 1138935/1138947 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 28941 event pairs, 631 based on Foata normal form. 13/5180 useless extension candidates. Maximal degree in co-relation 58812. Up to 4958 conditions per place. [2024-06-27 20:18:48,152 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 498 selfloop transitions, 26 changer transitions 0/528 dead transitions. [2024-06-27 20:18:48,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 528 transitions, 8455 flow [2024-06-27 20:18:48,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:18:48,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:18:48,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-27 20:18:48,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-27 20:18:48,154 INFO L175 Difference]: Start difference. First operand has 341 places, 515 transitions, 7365 flow. Second operand 8 states and 120 transitions. [2024-06-27 20:18:48,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 528 transitions, 8455 flow [2024-06-27 20:18:50,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 528 transitions, 7995 flow, removed 169 selfloop flow, removed 5 redundant places. [2024-06-27 20:18:50,796 INFO L231 Difference]: Finished difference. Result has 344 places, 515 transitions, 6965 flow [2024-06-27 20:18:50,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6905, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6965, PETRI_PLACES=344, PETRI_TRANSITIONS=515} [2024-06-27 20:18:50,796 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 302 predicate places. [2024-06-27 20:18:50,797 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 515 transitions, 6965 flow [2024-06-27 20:18:50,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:50,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:50,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:50,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 20:18:50,798 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)] === [2024-06-27 20:18:50,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:50,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1382999978, now seen corresponding path program 9 times [2024-06-27 20:18:50,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:50,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858645787] [2024-06-27 20:18:50,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:50,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:50,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:51,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:51,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:51,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858645787] [2024-06-27 20:18:51,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858645787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:51,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:51,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:18:51,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139039149] [2024-06-27 20:18:51,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:51,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:18:51,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:51,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:18:51,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:18:51,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:18:51,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 515 transitions, 6965 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:51,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:51,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:18:51,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:52,925 INFO L124 PetriNetUnfolderBase]: 3365/5189 cut-off events. [2024-06-27 20:18:52,925 INFO L125 PetriNetUnfolderBase]: For 1164238/1164248 co-relation queries the response was YES. [2024-06-27 20:18:52,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58477 conditions, 5189 events. 3365/5189 cut-off events. For 1164238/1164248 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 29038 event pairs, 642 based on Foata normal form. 9/5196 useless extension candidates. Maximal degree in co-relation 58311. Up to 4787 conditions per place. [2024-06-27 20:18:53,002 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 459 selfloop transitions, 72 changer transitions 0/535 dead transitions. [2024-06-27 20:18:53,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 535 transitions, 8313 flow [2024-06-27 20:18:53,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:18:53,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:18:53,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-27 20:18:53,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-27 20:18:53,003 INFO L175 Difference]: Start difference. First operand has 344 places, 515 transitions, 6965 flow. Second operand 9 states and 141 transitions. [2024-06-27 20:18:53,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 535 transitions, 8313 flow [2024-06-27 20:18:55,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 535 transitions, 8221 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 20:18:55,533 INFO L231 Difference]: Finished difference. Result has 346 places, 521 transitions, 7261 flow [2024-06-27 20:18:55,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6873, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7261, PETRI_PLACES=346, PETRI_TRANSITIONS=521} [2024-06-27 20:18:55,534 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 304 predicate places. [2024-06-27 20:18:55,534 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 521 transitions, 7261 flow [2024-06-27 20:18:55,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:55,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:55,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:55,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 20:18:55,535 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)] === [2024-06-27 20:18:55,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:55,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1820423476, now seen corresponding path program 10 times [2024-06-27 20:18:55,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:55,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520000228] [2024-06-27 20:18:55,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:55,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:55,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:56,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:56,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:56,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520000228] [2024-06-27 20:18:56,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520000228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:56,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:56,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:18:56,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43555873] [2024-06-27 20:18:56,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:56,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:18:56,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:56,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:18:56,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:18:56,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:18:56,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 521 transitions, 7261 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:56,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:56,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:18:56,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:57,794 INFO L124 PetriNetUnfolderBase]: 3369/5194 cut-off events. [2024-06-27 20:18:57,794 INFO L125 PetriNetUnfolderBase]: For 1167889/1167895 co-relation queries the response was YES. [2024-06-27 20:18:57,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58762 conditions, 5194 events. 3369/5194 cut-off events. For 1167889/1167895 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 28948 event pairs, 604 based on Foata normal form. 10/5203 useless extension candidates. Maximal degree in co-relation 58595. Up to 4679 conditions per place. [2024-06-27 20:18:57,870 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 439 selfloop transitions, 103 changer transitions 0/546 dead transitions. [2024-06-27 20:18:57,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 546 transitions, 8934 flow [2024-06-27 20:18:57,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:18:57,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:18:57,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-27 20:18:57,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853658536585366 [2024-06-27 20:18:57,871 INFO L175 Difference]: Start difference. First operand has 346 places, 521 transitions, 7261 flow. Second operand 10 states and 158 transitions. [2024-06-27 20:18:57,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 546 transitions, 8934 flow [2024-06-27 20:19:00,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 546 transitions, 8635 flow, removed 80 selfloop flow, removed 7 redundant places. [2024-06-27 20:19:00,437 INFO L231 Difference]: Finished difference. Result has 350 places, 529 transitions, 7447 flow [2024-06-27 20:19:00,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6964, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7447, PETRI_PLACES=350, PETRI_TRANSITIONS=529} [2024-06-27 20:19:00,438 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 308 predicate places. [2024-06-27 20:19:00,438 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 529 transitions, 7447 flow [2024-06-27 20:19:00,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:00,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:00,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:00,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 20:19:00,438 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)] === [2024-06-27 20:19:00,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:00,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1021717790, now seen corresponding path program 1 times [2024-06-27 20:19:00,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:00,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680296914] [2024-06-27 20:19:00,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:00,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:00,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:01,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:01,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:01,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680296914] [2024-06-27 20:19:01,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680296914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:01,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:01,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:01,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082328103] [2024-06-27 20:19:01,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:01,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:01,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:01,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:01,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:01,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:19:01,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 529 transitions, 7447 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:01,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:01,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:19:01,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:02,667 INFO L124 PetriNetUnfolderBase]: 3232/5058 cut-off events. [2024-06-27 20:19:02,668 INFO L125 PetriNetUnfolderBase]: For 1186162/1186166 co-relation queries the response was YES. [2024-06-27 20:19:02,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58191 conditions, 5058 events. 3232/5058 cut-off events. For 1186162/1186166 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 28898 event pairs, 558 based on Foata normal form. 3/5056 useless extension candidates. Maximal degree in co-relation 58022. Up to 4681 conditions per place. [2024-06-27 20:19:02,878 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 504 selfloop transitions, 19 changer transitions 0/553 dead transitions. [2024-06-27 20:19:02,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 553 transitions, 8637 flow [2024-06-27 20:19:02,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:02,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:02,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-27 20:19:02,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-27 20:19:02,879 INFO L175 Difference]: Start difference. First operand has 350 places, 529 transitions, 7447 flow. Second operand 9 states and 144 transitions. [2024-06-27 20:19:02,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 553 transitions, 8637 flow [2024-06-27 20:19:06,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 553 transitions, 8328 flow, removed 86 selfloop flow, removed 5 redundant places. [2024-06-27 20:19:06,016 INFO L231 Difference]: Finished difference. Result has 354 places, 532 transitions, 7269 flow [2024-06-27 20:19:06,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7138, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7269, PETRI_PLACES=354, PETRI_TRANSITIONS=532} [2024-06-27 20:19:06,017 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 312 predicate places. [2024-06-27 20:19:06,017 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 532 transitions, 7269 flow [2024-06-27 20:19:06,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:06,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:06,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:06,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 20:19:06,017 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)] === [2024-06-27 20:19:06,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:06,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1274582870, now seen corresponding path program 2 times [2024-06-27 20:19:06,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:06,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237681978] [2024-06-27 20:19:06,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:06,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:06,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:06,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:06,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:06,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237681978] [2024-06-27 20:19:06,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237681978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:06,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:06,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:06,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26959133] [2024-06-27 20:19:06,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:06,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:06,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:06,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:06,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:07,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:19:07,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 532 transitions, 7269 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:07,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:07,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:19:07,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:08,348 INFO L124 PetriNetUnfolderBase]: 3240/5068 cut-off events. [2024-06-27 20:19:08,348 INFO L125 PetriNetUnfolderBase]: For 1202474/1202478 co-relation queries the response was YES. [2024-06-27 20:19:08,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58101 conditions, 5068 events. 3240/5068 cut-off events. For 1202474/1202478 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 28969 event pairs, 589 based on Foata normal form. 3/5064 useless extension candidates. Maximal degree in co-relation 57930. Up to 4702 conditions per place. [2024-06-27 20:19:08,430 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 500 selfloop transitions, 22 changer transitions 0/552 dead transitions. [2024-06-27 20:19:08,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 552 transitions, 8447 flow [2024-06-27 20:19:08,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:19:08,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:19:08,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 20:19:08,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-27 20:19:08,431 INFO L175 Difference]: Start difference. First operand has 354 places, 532 transitions, 7269 flow. Second operand 8 states and 132 transitions. [2024-06-27 20:19:08,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 552 transitions, 8447 flow [2024-06-27 20:19:11,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 552 transitions, 8344 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-27 20:19:11,027 INFO L231 Difference]: Finished difference. Result has 356 places, 534 transitions, 7296 flow [2024-06-27 20:19:11,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7166, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7296, PETRI_PLACES=356, PETRI_TRANSITIONS=534} [2024-06-27 20:19:11,027 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 314 predicate places. [2024-06-27 20:19:11,028 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 534 transitions, 7296 flow [2024-06-27 20:19:11,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:11,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:11,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:11,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 20:19:11,028 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)] === [2024-06-27 20:19:11,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:11,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1274582746, now seen corresponding path program 1 times [2024-06-27 20:19:11,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:11,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706785442] [2024-06-27 20:19:11,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:11,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:11,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:11,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:11,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:11,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706785442] [2024-06-27 20:19:11,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706785442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:11,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:11,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:11,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869787165] [2024-06-27 20:19:11,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:11,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:11,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:11,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:11,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:12,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:19:12,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 534 transitions, 7296 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:12,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:12,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:19:12,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:13,214 INFO L124 PetriNetUnfolderBase]: 3234/5062 cut-off events. [2024-06-27 20:19:13,214 INFO L125 PetriNetUnfolderBase]: For 1210773/1210777 co-relation queries the response was YES. [2024-06-27 20:19:13,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57956 conditions, 5062 events. 3234/5062 cut-off events. For 1210773/1210777 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 28950 event pairs, 587 based on Foata normal form. 3/5060 useless extension candidates. Maximal degree in co-relation 57784. Up to 4692 conditions per place. [2024-06-27 20:19:13,297 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 499 selfloop transitions, 26 changer transitions 0/555 dead transitions. [2024-06-27 20:19:13,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 555 transitions, 8502 flow [2024-06-27 20:19:13,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:19:13,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:19:13,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 20:19:13,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-27 20:19:13,298 INFO L175 Difference]: Start difference. First operand has 356 places, 534 transitions, 7296 flow. Second operand 8 states and 133 transitions. [2024-06-27 20:19:13,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 555 transitions, 8502 flow [2024-06-27 20:19:15,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 555 transitions, 8390 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-27 20:19:15,914 INFO L231 Difference]: Finished difference. Result has 358 places, 537 transitions, 7342 flow [2024-06-27 20:19:15,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7184, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7342, PETRI_PLACES=358, PETRI_TRANSITIONS=537} [2024-06-27 20:19:15,914 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 316 predicate places. [2024-06-27 20:19:15,914 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 537 transitions, 7342 flow [2024-06-27 20:19:15,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:15,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:15,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:15,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 20:19:15,915 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)] === [2024-06-27 20:19:15,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:15,916 INFO L85 PathProgramCache]: Analyzing trace with hash -861128382, now seen corresponding path program 3 times [2024-06-27 20:19:15,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:15,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449675278] [2024-06-27 20:19:15,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:15,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:15,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:16,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:16,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:16,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449675278] [2024-06-27 20:19:16,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449675278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:16,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:16,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:16,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778847731] [2024-06-27 20:19:16,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:16,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:16,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:16,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:16,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:16,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:19:16,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 537 transitions, 7342 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:16,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:16,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:19:16,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:18,072 INFO L124 PetriNetUnfolderBase]: 3242/5070 cut-off events. [2024-06-27 20:19:18,072 INFO L125 PetriNetUnfolderBase]: For 1231071/1231075 co-relation queries the response was YES. [2024-06-27 20:19:18,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58432 conditions, 5070 events. 3242/5070 cut-off events. For 1231071/1231075 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 28974 event pairs, 583 based on Foata normal form. 3/5064 useless extension candidates. Maximal degree in co-relation 58259. Up to 4700 conditions per place. [2024-06-27 20:19:18,157 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 498 selfloop transitions, 27 changer transitions 0/555 dead transitions. [2024-06-27 20:19:18,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 555 transitions, 8532 flow [2024-06-27 20:19:18,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:19:18,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:19:18,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 20:19:18,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-27 20:19:18,159 INFO L175 Difference]: Start difference. First operand has 358 places, 537 transitions, 7342 flow. Second operand 8 states and 132 transitions. [2024-06-27 20:19:18,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 555 transitions, 8532 flow [2024-06-27 20:19:20,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 555 transitions, 8410 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-27 20:19:20,965 INFO L231 Difference]: Finished difference. Result has 360 places, 539 transitions, 7365 flow [2024-06-27 20:19:20,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7220, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7365, PETRI_PLACES=360, PETRI_TRANSITIONS=539} [2024-06-27 20:19:20,965 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 318 predicate places. [2024-06-27 20:19:20,965 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 539 transitions, 7365 flow [2024-06-27 20:19:20,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:20,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:20,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:20,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 20:19:20,966 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)] === [2024-06-27 20:19:20,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:20,967 INFO L85 PathProgramCache]: Analyzing trace with hash -695489248, now seen corresponding path program 4 times [2024-06-27 20:19:20,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:20,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966796121] [2024-06-27 20:19:20,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:20,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:20,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:21,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:21,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:21,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966796121] [2024-06-27 20:19:21,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966796121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:21,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:21,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:21,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9438536] [2024-06-27 20:19:21,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:21,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:21,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:21,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:21,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:21,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:19:21,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 539 transitions, 7365 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:21,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:21,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:19:21,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:23,163 INFO L124 PetriNetUnfolderBase]: 3224/5050 cut-off events. [2024-06-27 20:19:23,163 INFO L125 PetriNetUnfolderBase]: For 1240879/1240885 co-relation queries the response was YES. [2024-06-27 20:19:23,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58254 conditions, 5050 events. 3224/5050 cut-off events. For 1240879/1240885 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 28958 event pairs, 581 based on Foata normal form. 3/5042 useless extension candidates. Maximal degree in co-relation 58080. Up to 4668 conditions per place. [2024-06-27 20:19:23,244 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 490 selfloop transitions, 34 changer transitions 0/554 dead transitions. [2024-06-27 20:19:23,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 554 transitions, 8547 flow [2024-06-27 20:19:23,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:19:23,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:19:23,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 20:19:23,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-27 20:19:23,246 INFO L175 Difference]: Start difference. First operand has 360 places, 539 transitions, 7365 flow. Second operand 8 states and 131 transitions. [2024-06-27 20:19:23,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 554 transitions, 8547 flow [2024-06-27 20:19:25,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 554 transitions, 8418 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-27 20:19:25,990 INFO L231 Difference]: Finished difference. Result has 362 places, 541 transitions, 7399 flow [2024-06-27 20:19:25,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7236, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7399, PETRI_PLACES=362, PETRI_TRANSITIONS=541} [2024-06-27 20:19:25,991 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-27 20:19:25,991 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 541 transitions, 7399 flow [2024-06-27 20:19:25,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:25,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:25,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:25,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 20:19:25,992 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)] === [2024-06-27 20:19:25,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:25,992 INFO L85 PathProgramCache]: Analyzing trace with hash -695304550, now seen corresponding path program 1 times [2024-06-27 20:19:25,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:25,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820005329] [2024-06-27 20:19:25,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:25,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:26,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:26,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:26,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:26,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820005329] [2024-06-27 20:19:26,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820005329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:26,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:26,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:19:26,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453333934] [2024-06-27 20:19:26,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:26,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:19:26,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:26,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:19:26,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:19:27,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:19:27,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 541 transitions, 7399 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:27,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:27,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:19:27,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:28,212 INFO L124 PetriNetUnfolderBase]: 3375/5207 cut-off events. [2024-06-27 20:19:28,213 INFO L125 PetriNetUnfolderBase]: For 1241827/1241835 co-relation queries the response was YES. [2024-06-27 20:19:28,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59104 conditions, 5207 events. 3375/5207 cut-off events. For 1241827/1241835 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 29184 event pairs, 626 based on Foata normal form. 6/5212 useless extension candidates. Maximal degree in co-relation 58929. Up to 5016 conditions per place. [2024-06-27 20:19:28,297 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 522 selfloop transitions, 25 changer transitions 0/551 dead transitions. [2024-06-27 20:19:28,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 551 transitions, 8519 flow [2024-06-27 20:19:28,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:19:28,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:19:28,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-27 20:19:28,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-27 20:19:28,298 INFO L175 Difference]: Start difference. First operand has 362 places, 541 transitions, 7399 flow. Second operand 8 states and 120 transitions. [2024-06-27 20:19:28,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 551 transitions, 8519 flow [2024-06-27 20:19:31,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 551 transitions, 8372 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-27 20:19:31,385 INFO L231 Difference]: Finished difference. Result has 364 places, 541 transitions, 7310 flow [2024-06-27 20:19:31,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7252, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7310, PETRI_PLACES=364, PETRI_TRANSITIONS=541} [2024-06-27 20:19:31,386 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 322 predicate places. [2024-06-27 20:19:31,386 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 541 transitions, 7310 flow [2024-06-27 20:19:31,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:31,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:31,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:31,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 20:19:31,387 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)] === [2024-06-27 20:19:31,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:31,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1788575644, now seen corresponding path program 2 times [2024-06-27 20:19:31,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:31,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117935816] [2024-06-27 20:19:31,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:31,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:31,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:32,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:32,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:32,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117935816] [2024-06-27 20:19:32,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117935816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:32,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:32,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:32,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227344897] [2024-06-27 20:19:32,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:32,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:32,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:32,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:32,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:32,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:19:32,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 541 transitions, 7310 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:32,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:32,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:19:32,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:33,777 INFO L124 PetriNetUnfolderBase]: 3385/5221 cut-off events. [2024-06-27 20:19:33,778 INFO L125 PetriNetUnfolderBase]: For 1257605/1257613 co-relation queries the response was YES. [2024-06-27 20:19:33,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59232 conditions, 5221 events. 3385/5221 cut-off events. For 1257605/1257613 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 29287 event pairs, 626 based on Foata normal form. 6/5226 useless extension candidates. Maximal degree in co-relation 59056. Up to 4994 conditions per place. [2024-06-27 20:19:33,865 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 504 selfloop transitions, 50 changer transitions 0/558 dead transitions. [2024-06-27 20:19:33,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 558 transitions, 8803 flow [2024-06-27 20:19:33,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:19:33,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:19:33,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 20:19:33,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-27 20:19:33,866 INFO L175 Difference]: Start difference. First operand has 364 places, 541 transitions, 7310 flow. Second operand 8 states and 126 transitions. [2024-06-27 20:19:33,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 558 transitions, 8803 flow [2024-06-27 20:19:36,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 558 transitions, 8701 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 20:19:36,920 INFO L231 Difference]: Finished difference. Result has 366 places, 546 transitions, 7429 flow [2024-06-27 20:19:36,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7208, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7429, PETRI_PLACES=366, PETRI_TRANSITIONS=546} [2024-06-27 20:19:36,920 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 324 predicate places. [2024-06-27 20:19:36,921 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 546 transitions, 7429 flow [2024-06-27 20:19:36,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:36,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:36,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:36,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 20:19:36,921 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)] === [2024-06-27 20:19:36,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:36,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1406622890, now seen corresponding path program 3 times [2024-06-27 20:19:36,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:36,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754714750] [2024-06-27 20:19:36,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:36,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:36,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:38,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:38,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:38,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754714750] [2024-06-27 20:19:38,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754714750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:38,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:38,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:38,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125081904] [2024-06-27 20:19:38,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:38,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:38,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:38,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:38,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:38,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:19:38,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 546 transitions, 7429 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:38,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:38,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:19:38,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:39,613 INFO L124 PetriNetUnfolderBase]: 3390/5228 cut-off events. [2024-06-27 20:19:39,614 INFO L125 PetriNetUnfolderBase]: For 1278604/1278612 co-relation queries the response was YES. [2024-06-27 20:19:39,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59513 conditions, 5228 events. 3390/5228 cut-off events. For 1278604/1278612 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 29282 event pairs, 623 based on Foata normal form. 6/5233 useless extension candidates. Maximal degree in co-relation 59336. Up to 5000 conditions per place. [2024-06-27 20:19:39,702 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 499 selfloop transitions, 58 changer transitions 0/561 dead transitions. [2024-06-27 20:19:39,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 561 transitions, 8896 flow [2024-06-27 20:19:39,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:19:39,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:19:39,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 144 transitions. [2024-06-27 20:19:39,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35121951219512193 [2024-06-27 20:19:39,704 INFO L175 Difference]: Start difference. First operand has 366 places, 546 transitions, 7429 flow. Second operand 10 states and 144 transitions. [2024-06-27 20:19:39,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 561 transitions, 8896 flow [2024-06-27 20:19:43,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 561 transitions, 8766 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 20:19:43,052 INFO L231 Difference]: Finished difference. Result has 371 places, 549 transitions, 7506 flow [2024-06-27 20:19:43,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7302, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7506, PETRI_PLACES=371, PETRI_TRANSITIONS=549} [2024-06-27 20:19:43,053 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-27 20:19:43,053 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 549 transitions, 7506 flow [2024-06-27 20:19:43,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:43,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:43,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:43,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 20:19:43,054 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)] === [2024-06-27 20:19:43,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:43,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1406919560, now seen corresponding path program 4 times [2024-06-27 20:19:43,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:43,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859500702] [2024-06-27 20:19:43,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:43,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:43,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:44,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:44,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:44,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859500702] [2024-06-27 20:19:44,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859500702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:44,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:44,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:44,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21558844] [2024-06-27 20:19:44,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:44,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:44,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:44,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:44,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:44,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:19:44,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 549 transitions, 7506 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:44,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:44,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:19:44,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:45,739 INFO L124 PetriNetUnfolderBase]: 3383/5218 cut-off events. [2024-06-27 20:19:45,739 INFO L125 PetriNetUnfolderBase]: For 1290165/1290173 co-relation queries the response was YES. [2024-06-27 20:19:45,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59475 conditions, 5218 events. 3383/5218 cut-off events. For 1290165/1290173 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 29207 event pairs, 626 based on Foata normal form. 6/5223 useless extension candidates. Maximal degree in co-relation 59297. Up to 4991 conditions per place. [2024-06-27 20:19:45,824 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 501 selfloop transitions, 56 changer transitions 0/561 dead transitions. [2024-06-27 20:19:45,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 561 transitions, 8658 flow [2024-06-27 20:19:45,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:45,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:45,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-27 20:19:45,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-27 20:19:45,826 INFO L175 Difference]: Start difference. First operand has 371 places, 549 transitions, 7506 flow. Second operand 9 states and 135 transitions. [2024-06-27 20:19:45,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 561 transitions, 8658 flow [2024-06-27 20:19:48,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 561 transitions, 8421 flow, removed 56 selfloop flow, removed 8 redundant places. [2024-06-27 20:19:48,928 INFO L231 Difference]: Finished difference. Result has 373 places, 550 transitions, 7407 flow [2024-06-27 20:19:48,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7269, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7407, PETRI_PLACES=373, PETRI_TRANSITIONS=550} [2024-06-27 20:19:48,928 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 331 predicate places. [2024-06-27 20:19:48,928 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 550 transitions, 7407 flow [2024-06-27 20:19:48,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:48,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:48,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:48,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 20:19:48,929 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)] === [2024-06-27 20:19:48,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:48,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1272829266, now seen corresponding path program 1 times [2024-06-27 20:19:48,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:48,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227305139] [2024-06-27 20:19:48,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:48,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:48,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:49,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:49,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:49,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227305139] [2024-06-27 20:19:49,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227305139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:49,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:49,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:49,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93852010] [2024-06-27 20:19:49,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:49,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:49,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:49,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:49,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:49,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:19:49,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 550 transitions, 7407 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:49,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:49,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:19:49,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:50,984 INFO L124 PetriNetUnfolderBase]: 3399/5245 cut-off events. [2024-06-27 20:19:50,984 INFO L125 PetriNetUnfolderBase]: For 1324459/1324469 co-relation queries the response was YES. [2024-06-27 20:19:51,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59874 conditions, 5245 events. 3399/5245 cut-off events. For 1324459/1324469 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 29292 event pairs, 453 based on Foata normal form. 14/5258 useless extension candidates. Maximal degree in co-relation 59695. Up to 4852 conditions per place. [2024-06-27 20:19:51,072 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 537 selfloop transitions, 42 changer transitions 0/583 dead transitions. [2024-06-27 20:19:51,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 583 transitions, 8804 flow [2024-06-27 20:19:51,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:51,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:51,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-27 20:19:51,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-27 20:19:51,074 INFO L175 Difference]: Start difference. First operand has 373 places, 550 transitions, 7407 flow. Second operand 9 states and 151 transitions. [2024-06-27 20:19:51,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 583 transitions, 8804 flow [2024-06-27 20:19:54,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 583 transitions, 8728 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 20:19:54,841 INFO L231 Difference]: Finished difference. Result has 377 places, 553 transitions, 7569 flow [2024-06-27 20:19:54,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7331, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7569, PETRI_PLACES=377, PETRI_TRANSITIONS=553} [2024-06-27 20:19:54,841 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2024-06-27 20:19:54,842 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 553 transitions, 7569 flow [2024-06-27 20:19:54,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:54,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:54,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:54,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 20:19:54,842 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)] === [2024-06-27 20:19:54,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:54,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1496161462, now seen corresponding path program 2 times [2024-06-27 20:19:54,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:54,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044816935] [2024-06-27 20:19:54,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:54,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:54,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:55,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:55,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:55,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044816935] [2024-06-27 20:19:55,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044816935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:55,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:55,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:55,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557760953] [2024-06-27 20:19:55,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:55,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:55,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:55,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:55,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:55,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:19:55,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 553 transitions, 7569 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:55,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:55,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:19:55,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:57,138 INFO L124 PetriNetUnfolderBase]: 3415/5269 cut-off events. [2024-06-27 20:19:57,138 INFO L125 PetriNetUnfolderBase]: For 1349916/1349926 co-relation queries the response was YES. [2024-06-27 20:19:57,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60745 conditions, 5269 events. 3415/5269 cut-off events. For 1349916/1349926 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 29464 event pairs, 571 based on Foata normal form. 14/5282 useless extension candidates. Maximal degree in co-relation 60565. Up to 4929 conditions per place. [2024-06-27 20:19:57,223 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 535 selfloop transitions, 43 changer transitions 0/582 dead transitions. [2024-06-27 20:19:57,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 582 transitions, 8958 flow [2024-06-27 20:19:57,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:57,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:57,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-27 20:19:57,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-27 20:19:57,224 INFO L175 Difference]: Start difference. First operand has 377 places, 553 transitions, 7569 flow. Second operand 9 states and 148 transitions. [2024-06-27 20:19:57,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 582 transitions, 8958 flow [2024-06-27 20:20:01,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 582 transitions, 8742 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-27 20:20:01,049 INFO L231 Difference]: Finished difference. Result has 379 places, 556 transitions, 7599 flow [2024-06-27 20:20:01,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7353, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7599, PETRI_PLACES=379, PETRI_TRANSITIONS=556} [2024-06-27 20:20:01,064 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 337 predicate places. [2024-06-27 20:20:01,064 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 556 transitions, 7599 flow [2024-06-27 20:20:01,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:01,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:01,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:01,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 20:20:01,064 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)] === [2024-06-27 20:20:01,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:01,065 INFO L85 PathProgramCache]: Analyzing trace with hash -119991866, now seen corresponding path program 3 times [2024-06-27 20:20:01,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:01,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042950936] [2024-06-27 20:20:01,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:01,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:01,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:01,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:01,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:01,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042950936] [2024-06-27 20:20:01,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042950936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:01,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:01,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:20:01,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718376914] [2024-06-27 20:20:01,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:01,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:20:01,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:01,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:20:01,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:20:01,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:20:01,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 556 transitions, 7599 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:01,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:01,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:20:01,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:03,266 INFO L124 PetriNetUnfolderBase]: 3431/5293 cut-off events. [2024-06-27 20:20:03,267 INFO L125 PetriNetUnfolderBase]: For 1373151/1373161 co-relation queries the response was YES. [2024-06-27 20:20:03,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61200 conditions, 5293 events. 3431/5293 cut-off events. For 1373151/1373161 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 29697 event pairs, 575 based on Foata normal form. 14/5306 useless extension candidates. Maximal degree in co-relation 61019. Up to 4963 conditions per place. [2024-06-27 20:20:03,354 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 536 selfloop transitions, 44 changer transitions 0/584 dead transitions. [2024-06-27 20:20:03,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 584 transitions, 8996 flow [2024-06-27 20:20:03,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:20:03,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:20:03,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-27 20:20:03,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-27 20:20:03,356 INFO L175 Difference]: Start difference. First operand has 379 places, 556 transitions, 7599 flow. Second operand 9 states and 148 transitions. [2024-06-27 20:20:03,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 584 transitions, 8996 flow [2024-06-27 20:20:07,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 584 transitions, 8772 flow, removed 71 selfloop flow, removed 7 redundant places. [2024-06-27 20:20:07,186 INFO L231 Difference]: Finished difference. Result has 381 places, 559 transitions, 7629 flow [2024-06-27 20:20:07,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7375, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7629, PETRI_PLACES=381, PETRI_TRANSITIONS=559} [2024-06-27 20:20:07,187 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 339 predicate places. [2024-06-27 20:20:07,187 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 559 transitions, 7629 flow [2024-06-27 20:20:07,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:07,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:07,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:07,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 20:20:07,188 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)] === [2024-06-27 20:20:07,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:07,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1388401254, now seen corresponding path program 1 times [2024-06-27 20:20:07,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:07,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926873342] [2024-06-27 20:20:07,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:07,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:07,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:07,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:07,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:07,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926873342] [2024-06-27 20:20:07,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926873342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:07,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:07,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:20:07,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326447340] [2024-06-27 20:20:07,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:07,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:20:07,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:07,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:20:07,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:20:07,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:20:07,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 559 transitions, 7629 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:07,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:07,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:20:07,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:09,092 INFO L124 PetriNetUnfolderBase]: 3441/5312 cut-off events. [2024-06-27 20:20:09,092 INFO L125 PetriNetUnfolderBase]: For 1375876/1375884 co-relation queries the response was YES. [2024-06-27 20:20:09,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61448 conditions, 5312 events. 3441/5312 cut-off events. For 1375876/1375884 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 29814 event pairs, 594 based on Foata normal form. 8/5319 useless extension candidates. Maximal degree in co-relation 61266. Up to 4689 conditions per place. [2024-06-27 20:20:09,177 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 496 selfloop transitions, 95 changer transitions 0/595 dead transitions. [2024-06-27 20:20:09,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 595 transitions, 9069 flow [2024-06-27 20:20:09,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:20:09,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:20:09,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 20:20:09,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-27 20:20:09,178 INFO L175 Difference]: Start difference. First operand has 381 places, 559 transitions, 7629 flow. Second operand 8 states and 143 transitions. [2024-06-27 20:20:09,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 595 transitions, 9069 flow [2024-06-27 20:20:12,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 595 transitions, 8837 flow, removed 74 selfloop flow, removed 7 redundant places. [2024-06-27 20:20:12,914 INFO L231 Difference]: Finished difference. Result has 383 places, 567 transitions, 7757 flow [2024-06-27 20:20:12,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7397, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7757, PETRI_PLACES=383, PETRI_TRANSITIONS=567} [2024-06-27 20:20:12,915 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 341 predicate places. [2024-06-27 20:20:12,915 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 567 transitions, 7757 flow [2024-06-27 20:20:12,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:12,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:12,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:12,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 20:20:12,916 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)] === [2024-06-27 20:20:12,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:12,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1027398148, now seen corresponding path program 2 times [2024-06-27 20:20:12,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:12,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532482599] [2024-06-27 20:20:12,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:12,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:12,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:13,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:13,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:13,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532482599] [2024-06-27 20:20:13,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532482599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:13,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:13,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:20:13,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526781450] [2024-06-27 20:20:13,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:13,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:20:13,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:13,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:20:13,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:20:13,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:20:13,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 567 transitions, 7757 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:13,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:13,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:20:13,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:14,844 INFO L124 PetriNetUnfolderBase]: 3467/5344 cut-off events. [2024-06-27 20:20:14,844 INFO L125 PetriNetUnfolderBase]: For 1409967/1409975 co-relation queries the response was YES. [2024-06-27 20:20:14,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62521 conditions, 5344 events. 3467/5344 cut-off events. For 1409967/1409975 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 29934 event pairs, 600 based on Foata normal form. 8/5351 useless extension candidates. Maximal degree in co-relation 62337. Up to 4682 conditions per place. [2024-06-27 20:20:14,934 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 492 selfloop transitions, 103 changer transitions 0/599 dead transitions. [2024-06-27 20:20:14,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 599 transitions, 9490 flow [2024-06-27 20:20:14,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:20:14,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:20:14,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 20:20:14,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 20:20:14,935 INFO L175 Difference]: Start difference. First operand has 383 places, 567 transitions, 7757 flow. Second operand 8 states and 144 transitions. [2024-06-27 20:20:14,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 599 transitions, 9490 flow [2024-06-27 20:20:19,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 599 transitions, 9272 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-27 20:20:19,180 INFO L231 Difference]: Finished difference. Result has 387 places, 573 transitions, 7939 flow [2024-06-27 20:20:19,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7539, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7939, PETRI_PLACES=387, PETRI_TRANSITIONS=573} [2024-06-27 20:20:19,180 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 345 predicate places. [2024-06-27 20:20:19,181 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 573 transitions, 7939 flow [2024-06-27 20:20:19,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:19,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:19,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:19,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 20:20:19,181 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)] === [2024-06-27 20:20:19,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:19,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1906067768, now seen corresponding path program 3 times [2024-06-27 20:20:19,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:19,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596477045] [2024-06-27 20:20:19,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:19,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:19,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:19,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:19,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:19,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596477045] [2024-06-27 20:20:19,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596477045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:19,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:19,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:20:19,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631140981] [2024-06-27 20:20:19,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:19,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:20:19,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:19,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:20:19,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:20:19,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:20:19,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 573 transitions, 7939 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:19,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:19,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:20:19,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:21,125 INFO L124 PetriNetUnfolderBase]: 3477/5360 cut-off events. [2024-06-27 20:20:21,125 INFO L125 PetriNetUnfolderBase]: For 1431250/1431256 co-relation queries the response was YES. [2024-06-27 20:20:21,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62885 conditions, 5360 events. 3477/5360 cut-off events. For 1431250/1431256 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 30086 event pairs, 609 based on Foata normal form. 3/5362 useless extension candidates. Maximal degree in co-relation 62700. Up to 4739 conditions per place. [2024-06-27 20:20:21,210 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 508 selfloop transitions, 94 changer transitions 0/606 dead transitions. [2024-06-27 20:20:21,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 606 transitions, 9416 flow [2024-06-27 20:20:21,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:20:21,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:20:21,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 20:20:21,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-27 20:20:21,212 INFO L175 Difference]: Start difference. First operand has 387 places, 573 transitions, 7939 flow. Second operand 8 states and 138 transitions. [2024-06-27 20:20:21,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 606 transitions, 9416 flow [2024-06-27 20:20:25,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 606 transitions, 9206 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-27 20:20:25,347 INFO L231 Difference]: Finished difference. Result has 392 places, 581 transitions, 8115 flow [2024-06-27 20:20:25,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7743, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8115, PETRI_PLACES=392, PETRI_TRANSITIONS=581} [2024-06-27 20:20:25,348 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 350 predicate places. [2024-06-27 20:20:25,348 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 581 transitions, 8115 flow [2024-06-27 20:20:25,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:25,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:25,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:25,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 20:20:25,349 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)] === [2024-06-27 20:20:25,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:25,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1584323979, now seen corresponding path program 1 times [2024-06-27 20:20:25,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:25,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348862252] [2024-06-27 20:20:25,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:25,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:25,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:26,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:26,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:26,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348862252] [2024-06-27 20:20:26,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348862252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:26,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:26,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:20:26,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038017923] [2024-06-27 20:20:26,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:26,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:20:26,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:26,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:20:26,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:20:26,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:20:26,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 581 transitions, 8115 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:26,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:26,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:20:26,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:27,669 INFO L124 PetriNetUnfolderBase]: 3471/5341 cut-off events. [2024-06-27 20:20:27,670 INFO L125 PetriNetUnfolderBase]: For 1436006/1436012 co-relation queries the response was YES. [2024-06-27 20:20:27,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63151 conditions, 5341 events. 3471/5341 cut-off events. For 1436006/1436012 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 29939 event pairs, 590 based on Foata normal form. 3/5343 useless extension candidates. Maximal degree in co-relation 62963. Up to 4705 conditions per place. [2024-06-27 20:20:27,754 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 502 selfloop transitions, 100 changer transitions 0/606 dead transitions. [2024-06-27 20:20:27,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 606 transitions, 9421 flow [2024-06-27 20:20:27,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:20:27,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:20:27,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 20:20:27,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-27 20:20:27,756 INFO L175 Difference]: Start difference. First operand has 392 places, 581 transitions, 8115 flow. Second operand 8 states and 141 transitions. [2024-06-27 20:20:27,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 606 transitions, 9421 flow [2024-06-27 20:20:32,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 606 transitions, 9171 flow, removed 70 selfloop flow, removed 4 redundant places. [2024-06-27 20:20:32,450 INFO L231 Difference]: Finished difference. Result has 396 places, 581 transitions, 8081 flow [2024-06-27 20:20:32,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7865, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8081, PETRI_PLACES=396, PETRI_TRANSITIONS=581} [2024-06-27 20:20:32,451 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 354 predicate places. [2024-06-27 20:20:32,451 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 581 transitions, 8081 flow [2024-06-27 20:20:32,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:32,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:32,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:32,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 20:20:32,452 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)] === [2024-06-27 20:20:32,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:32,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1906366298, now seen corresponding path program 4 times [2024-06-27 20:20:32,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:32,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369424500] [2024-06-27 20:20:32,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:32,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:32,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:33,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:33,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:33,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369424500] [2024-06-27 20:20:33,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369424500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:33,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:33,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:20:33,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996342846] [2024-06-27 20:20:33,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:33,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:20:33,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:33,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:20:33,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:20:33,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:20:33,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 581 transitions, 8081 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:33,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:33,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:20:33,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:34,551 INFO L124 PetriNetUnfolderBase]: 3481/5363 cut-off events. [2024-06-27 20:20:34,552 INFO L125 PetriNetUnfolderBase]: For 1462370/1462376 co-relation queries the response was YES. [2024-06-27 20:20:34,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63384 conditions, 5363 events. 3481/5363 cut-off events. For 1462370/1462376 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 30120 event pairs, 601 based on Foata normal form. 3/5365 useless extension candidates. Maximal degree in co-relation 63195. Up to 4697 conditions per place. [2024-06-27 20:20:34,637 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 498 selfloop transitions, 104 changer transitions 0/606 dead transitions. [2024-06-27 20:20:34,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 606 transitions, 9482 flow [2024-06-27 20:20:34,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:20:34,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:20:34,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 20:20:34,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-27 20:20:34,639 INFO L175 Difference]: Start difference. First operand has 396 places, 581 transitions, 8081 flow. Second operand 8 states and 137 transitions. [2024-06-27 20:20:34,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 606 transitions, 9482 flow [2024-06-27 20:20:38,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 606 transitions, 9267 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 20:20:38,880 INFO L231 Difference]: Finished difference. Result has 397 places, 584 transitions, 8184 flow [2024-06-27 20:20:38,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7866, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8184, PETRI_PLACES=397, PETRI_TRANSITIONS=584} [2024-06-27 20:20:38,881 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 355 predicate places. [2024-06-27 20:20:38,881 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 584 transitions, 8184 flow [2024-06-27 20:20:38,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:38,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:38,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:38,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 20:20:38,881 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)] === [2024-06-27 20:20:38,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:38,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1906366670, now seen corresponding path program 1 times [2024-06-27 20:20:38,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:38,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161591241] [2024-06-27 20:20:38,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:38,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:38,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:39,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:39,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:39,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161591241] [2024-06-27 20:20:39,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161591241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:39,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:39,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:20:39,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935352608] [2024-06-27 20:20:39,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:39,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:20:39,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:39,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:20:39,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:20:39,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:20:39,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 584 transitions, 8184 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:39,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:39,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:20:39,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:41,013 INFO L124 PetriNetUnfolderBase]: 3501/5385 cut-off events. [2024-06-27 20:20:41,013 INFO L125 PetriNetUnfolderBase]: For 1502444/1502450 co-relation queries the response was YES. [2024-06-27 20:20:41,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63951 conditions, 5385 events. 3501/5385 cut-off events. For 1502444/1502450 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 30244 event pairs, 589 based on Foata normal form. 5/5389 useless extension candidates. Maximal degree in co-relation 63761. Up to 4745 conditions per place. [2024-06-27 20:20:41,100 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 510 selfloop transitions, 101 changer transitions 0/615 dead transitions. [2024-06-27 20:20:41,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 615 transitions, 9654 flow [2024-06-27 20:20:41,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:20:41,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:20:41,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 20:20:41,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-27 20:20:41,102 INFO L175 Difference]: Start difference. First operand has 397 places, 584 transitions, 8184 flow. Second operand 9 states and 155 transitions. [2024-06-27 20:20:41,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 615 transitions, 9654 flow [2024-06-27 20:20:45,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 615 transitions, 9369 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-27 20:20:45,169 INFO L231 Difference]: Finished difference. Result has 400 places, 588 transitions, 8246 flow [2024-06-27 20:20:45,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7899, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8246, PETRI_PLACES=400, PETRI_TRANSITIONS=588} [2024-06-27 20:20:45,169 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 358 predicate places. [2024-06-27 20:20:45,170 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 588 transitions, 8246 flow [2024-06-27 20:20:45,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:45,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:45,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:45,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 20:20:45,170 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)] === [2024-06-27 20:20:45,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:45,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1895858032, now seen corresponding path program 5 times [2024-06-27 20:20:45,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:45,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504447280] [2024-06-27 20:20:45,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:45,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:45,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:45,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:45,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:45,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504447280] [2024-06-27 20:20:45,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504447280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:45,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:45,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:20:45,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338244894] [2024-06-27 20:20:45,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:45,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:20:45,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:45,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:20:45,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:20:45,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:20:45,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 588 transitions, 8246 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:45,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:45,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:20:45,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:47,171 INFO L124 PetriNetUnfolderBase]: 3511/5403 cut-off events. [2024-06-27 20:20:47,171 INFO L125 PetriNetUnfolderBase]: For 1511574/1511580 co-relation queries the response was YES. [2024-06-27 20:20:47,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64675 conditions, 5403 events. 3511/5403 cut-off events. For 1511574/1511580 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 30291 event pairs, 622 based on Foata normal form. 3/5405 useless extension candidates. Maximal degree in co-relation 64484. Up to 4562 conditions per place. [2024-06-27 20:20:47,260 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 463 selfloop transitions, 145 changer transitions 0/612 dead transitions. [2024-06-27 20:20:47,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 612 transitions, 10187 flow [2024-06-27 20:20:47,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:20:47,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:20:47,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 20:20:47,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-27 20:20:47,261 INFO L175 Difference]: Start difference. First operand has 400 places, 588 transitions, 8246 flow. Second operand 8 states and 140 transitions. [2024-06-27 20:20:47,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 612 transitions, 10187 flow [2024-06-27 20:20:51,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 612 transitions, 9868 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-27 20:20:51,284 INFO L231 Difference]: Finished difference. Result has 401 places, 591 transitions, 8326 flow [2024-06-27 20:20:51,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7927, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8326, PETRI_PLACES=401, PETRI_TRANSITIONS=591} [2024-06-27 20:20:51,284 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 359 predicate places. [2024-06-27 20:20:51,284 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 591 transitions, 8326 flow [2024-06-27 20:20:51,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:51,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:51,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:51,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 20:20:51,285 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)] === [2024-06-27 20:20:51,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:51,285 INFO L85 PathProgramCache]: Analyzing trace with hash -190035442, now seen corresponding path program 2 times [2024-06-27 20:20:51,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:51,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918538111] [2024-06-27 20:20:51,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:51,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:51,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:52,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:52,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:52,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918538111] [2024-06-27 20:20:52,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918538111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:52,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:52,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:20:52,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408124450] [2024-06-27 20:20:52,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:52,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:20:52,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:52,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:20:52,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:20:52,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:20:52,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 591 transitions, 8326 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:52,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:52,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:20:52,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:53,707 INFO L124 PetriNetUnfolderBase]: 3531/5431 cut-off events. [2024-06-27 20:20:53,707 INFO L125 PetriNetUnfolderBase]: For 1552704/1552710 co-relation queries the response was YES. [2024-06-27 20:20:53,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65050 conditions, 5431 events. 3531/5431 cut-off events. For 1552704/1552710 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 30510 event pairs, 595 based on Foata normal form. 5/5435 useless extension candidates. Maximal degree in co-relation 64858. Up to 4747 conditions per place. [2024-06-27 20:20:53,799 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 505 selfloop transitions, 110 changer transitions 0/619 dead transitions. [2024-06-27 20:20:53,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 619 transitions, 9810 flow [2024-06-27 20:20:53,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:20:53,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:20:53,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 20:20:53,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-27 20:20:53,800 INFO L175 Difference]: Start difference. First operand has 401 places, 591 transitions, 8326 flow. Second operand 9 states and 155 transitions. [2024-06-27 20:20:53,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 619 transitions, 9810 flow [2024-06-27 20:20:58,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 619 transitions, 9123 flow, removed 52 selfloop flow, removed 9 redundant places. [2024-06-27 20:20:58,327 INFO L231 Difference]: Finished difference. Result has 401 places, 595 transitions, 8012 flow [2024-06-27 20:20:58,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7639, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8012, PETRI_PLACES=401, PETRI_TRANSITIONS=595} [2024-06-27 20:20:58,345 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 359 predicate places. [2024-06-27 20:20:58,345 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 595 transitions, 8012 flow [2024-06-27 20:20:58,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:58,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:58,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:58,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 20:20:58,346 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)] === [2024-06-27 20:20:58,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:58,346 INFO L85 PathProgramCache]: Analyzing trace with hash -190029645, now seen corresponding path program 1 times [2024-06-27 20:20:58,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:58,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964991783] [2024-06-27 20:20:58,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:58,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:58,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:59,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:59,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:59,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964991783] [2024-06-27 20:20:59,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964991783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:59,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:59,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:20:59,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642719492] [2024-06-27 20:20:59,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:59,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:20:59,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:59,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:20:59,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:20:59,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:20:59,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 595 transitions, 8012 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:59,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:59,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:20:59,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:00,601 INFO L124 PetriNetUnfolderBase]: 3551/5455 cut-off events. [2024-06-27 20:21:00,602 INFO L125 PetriNetUnfolderBase]: For 1576317/1576325 co-relation queries the response was YES. [2024-06-27 20:21:00,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64850 conditions, 5455 events. 3551/5455 cut-off events. For 1576317/1576325 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 30615 event pairs, 575 based on Foata normal form. 9/5463 useless extension candidates. Maximal degree in co-relation 64660. Up to 5127 conditions per place. [2024-06-27 20:21:00,696 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 572 selfloop transitions, 48 changer transitions 0/624 dead transitions. [2024-06-27 20:21:00,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 624 transitions, 9593 flow [2024-06-27 20:21:00,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:21:00,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:21:00,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-27 20:21:00,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-27 20:21:00,698 INFO L175 Difference]: Start difference. First operand has 401 places, 595 transitions, 8012 flow. Second operand 9 states and 146 transitions. [2024-06-27 20:21:00,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 624 transitions, 9593 flow [2024-06-27 20:21:05,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 624 transitions, 9248 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-27 20:21:05,175 INFO L231 Difference]: Finished difference. Result has 403 places, 602 transitions, 8037 flow [2024-06-27 20:21:05,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7667, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8037, PETRI_PLACES=403, PETRI_TRANSITIONS=602} [2024-06-27 20:21:05,176 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 361 predicate places. [2024-06-27 20:21:05,176 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 602 transitions, 8037 flow [2024-06-27 20:21:05,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:05,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:05,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:05,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 20:21:05,176 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)] === [2024-06-27 20:21:05,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:05,177 INFO L85 PathProgramCache]: Analyzing trace with hash 2013415586, now seen corresponding path program 3 times [2024-06-27 20:21:05,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:05,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661717301] [2024-06-27 20:21:05,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:05,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:05,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:05,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:05,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:05,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661717301] [2024-06-27 20:21:05,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661717301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:05,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:05,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:21:05,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294821585] [2024-06-27 20:21:05,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:05,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:21:05,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:05,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:21:05,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:21:05,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:21:05,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 602 transitions, 8037 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:05,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:05,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:21:05,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:07,462 INFO L124 PetriNetUnfolderBase]: 3571/5491 cut-off events. [2024-06-27 20:21:07,463 INFO L125 PetriNetUnfolderBase]: For 1602104/1602112 co-relation queries the response was YES. [2024-06-27 20:21:07,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65025 conditions, 5491 events. 3571/5491 cut-off events. For 1602104/1602112 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 30908 event pairs, 580 based on Foata normal form. 9/5499 useless extension candidates. Maximal degree in co-relation 64834. Up to 5155 conditions per place. [2024-06-27 20:21:07,553 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 579 selfloop transitions, 45 changer transitions 0/628 dead transitions. [2024-06-27 20:21:07,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 628 transitions, 9513 flow [2024-06-27 20:21:07,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:21:07,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:21:07,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-27 20:21:07,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-27 20:21:07,555 INFO L175 Difference]: Start difference. First operand has 403 places, 602 transitions, 8037 flow. Second operand 9 states and 146 transitions. [2024-06-27 20:21:07,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 628 transitions, 9513 flow [2024-06-27 20:21:13,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 628 transitions, 9237 flow, removed 94 selfloop flow, removed 7 redundant places. [2024-06-27 20:21:13,340 INFO L231 Difference]: Finished difference. Result has 405 places, 606 transitions, 8014 flow [2024-06-27 20:21:13,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7761, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8014, PETRI_PLACES=405, PETRI_TRANSITIONS=606} [2024-06-27 20:21:13,340 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 363 predicate places. [2024-06-27 20:21:13,341 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 606 transitions, 8014 flow [2024-06-27 20:21:13,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:13,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:13,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:13,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 20:21:13,341 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)] === [2024-06-27 20:21:13,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:13,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1910085368, now seen corresponding path program 6 times [2024-06-27 20:21:13,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:13,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961360712] [2024-06-27 20:21:13,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:13,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:13,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:13,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:13,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:13,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961360712] [2024-06-27 20:21:13,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961360712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:13,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:13,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:21:13,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019252744] [2024-06-27 20:21:13,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:13,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:21:13,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:13,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:21:13,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:21:14,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:21:14,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 606 transitions, 8014 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:14,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:14,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:21:14,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:15,478 INFO L124 PetriNetUnfolderBase]: 3581/5511 cut-off events. [2024-06-27 20:21:15,478 INFO L125 PetriNetUnfolderBase]: For 1610772/1610778 co-relation queries the response was YES. [2024-06-27 20:21:15,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65598 conditions, 5511 events. 3581/5511 cut-off events. For 1610772/1610778 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 31071 event pairs, 627 based on Foata normal form. 3/5513 useless extension candidates. Maximal degree in co-relation 65406. Up to 4656 conditions per place. [2024-06-27 20:21:15,568 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 483 selfloop transitions, 142 changer transitions 0/629 dead transitions. [2024-06-27 20:21:15,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 629 transitions, 9719 flow [2024-06-27 20:21:15,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:21:15,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:21:15,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 20:21:15,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-27 20:21:15,569 INFO L175 Difference]: Start difference. First operand has 405 places, 606 transitions, 8014 flow. Second operand 8 states and 138 transitions. [2024-06-27 20:21:15,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 629 transitions, 9719 flow [2024-06-27 20:21:20,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 629 transitions, 9494 flow, removed 70 selfloop flow, removed 7 redundant places. [2024-06-27 20:21:20,806 INFO L231 Difference]: Finished difference. Result has 406 places, 609 transitions, 8168 flow [2024-06-27 20:21:20,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7789, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8168, PETRI_PLACES=406, PETRI_TRANSITIONS=609} [2024-06-27 20:21:20,806 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 364 predicate places. [2024-06-27 20:21:20,807 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 609 transitions, 8168 flow [2024-06-27 20:21:20,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:20,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:20,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:20,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 20:21:20,807 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)] === [2024-06-27 20:21:20,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:20,807 INFO L85 PathProgramCache]: Analyzing trace with hash -46144912, now seen corresponding path program 4 times [2024-06-27 20:21:20,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:20,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110472033] [2024-06-27 20:21:20,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:20,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:20,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:21,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:21,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:21,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110472033] [2024-06-27 20:21:21,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110472033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:21,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:21,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:21:21,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102669095] [2024-06-27 20:21:21,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:21,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:21:21,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:21,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:21:21,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:21:21,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:21:21,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 609 transitions, 8168 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:21,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:21,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:21:21,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:23,159 INFO L124 PetriNetUnfolderBase]: 3665/5631 cut-off events. [2024-06-27 20:21:23,159 INFO L125 PetriNetUnfolderBase]: For 1725466/1725472 co-relation queries the response was YES. [2024-06-27 20:21:23,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68576 conditions, 5631 events. 3665/5631 cut-off events. For 1725466/1725472 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 31773 event pairs, 635 based on Foata normal form. 5/5635 useless extension candidates. Maximal degree in co-relation 68383. Up to 4533 conditions per place. [2024-06-27 20:21:23,265 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 478 selfloop transitions, 161 changer transitions 0/643 dead transitions. [2024-06-27 20:21:23,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 643 transitions, 10558 flow [2024-06-27 20:21:23,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:21:23,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:21:23,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 20:21:23,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-27 20:21:23,266 INFO L175 Difference]: Start difference. First operand has 406 places, 609 transitions, 8168 flow. Second operand 9 states and 156 transitions. [2024-06-27 20:21:23,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 643 transitions, 10558 flow [2024-06-27 20:21:27,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 643 transitions, 10283 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-27 20:21:27,819 INFO L231 Difference]: Finished difference. Result has 411 places, 620 transitions, 8649 flow [2024-06-27 20:21:27,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7893, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8649, PETRI_PLACES=411, PETRI_TRANSITIONS=620} [2024-06-27 20:21:27,819 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 369 predicate places. [2024-06-27 20:21:27,819 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 620 transitions, 8649 flow [2024-06-27 20:21:27,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:27,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:27,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:27,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 20:21:27,820 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)] === [2024-06-27 20:21:27,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:27,820 INFO L85 PathProgramCache]: Analyzing trace with hash -699736676, now seen corresponding path program 5 times [2024-06-27 20:21:27,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:27,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703173345] [2024-06-27 20:21:27,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:27,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:27,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:28,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:28,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:28,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703173345] [2024-06-27 20:21:28,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703173345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:28,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:28,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:21:28,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930430954] [2024-06-27 20:21:28,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:28,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:21:28,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:28,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:21:28,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:21:28,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:21:28,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 620 transitions, 8649 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:28,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:28,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:21:28,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:30,121 INFO L124 PetriNetUnfolderBase]: 3685/5657 cut-off events. [2024-06-27 20:21:30,121 INFO L125 PetriNetUnfolderBase]: For 1760399/1760407 co-relation queries the response was YES. [2024-06-27 20:21:30,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69914 conditions, 5657 events. 3685/5657 cut-off events. For 1760399/1760407 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 31887 event pairs, 587 based on Foata normal form. 9/5665 useless extension candidates. Maximal degree in co-relation 69719. Up to 5275 conditions per place. [2024-06-27 20:21:30,223 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 584 selfloop transitions, 54 changer transitions 0/642 dead transitions. [2024-06-27 20:21:30,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 642 transitions, 10157 flow [2024-06-27 20:21:30,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:21:30,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:21:30,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-27 20:21:30,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-27 20:21:30,225 INFO L175 Difference]: Start difference. First operand has 411 places, 620 transitions, 8649 flow. Second operand 9 states and 144 transitions. [2024-06-27 20:21:30,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 642 transitions, 10157 flow [2024-06-27 20:21:35,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 642 transitions, 9819 flow, removed 117 selfloop flow, removed 4 redundant places. [2024-06-27 20:21:35,479 INFO L231 Difference]: Finished difference. Result has 416 places, 624 transitions, 8602 flow [2024-06-27 20:21:35,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8349, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8602, PETRI_PLACES=416, PETRI_TRANSITIONS=624} [2024-06-27 20:21:35,479 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 374 predicate places. [2024-06-27 20:21:35,480 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 624 transitions, 8602 flow [2024-06-27 20:21:35,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:35,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:35,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:35,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 20:21:35,480 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)] === [2024-06-27 20:21:35,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:35,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1181414502, now seen corresponding path program 6 times [2024-06-27 20:21:35,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:35,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618140898] [2024-06-27 20:21:35,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:35,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:35,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:36,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:36,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:36,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618140898] [2024-06-27 20:21:36,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618140898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:36,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:36,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:21:36,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660146007] [2024-06-27 20:21:36,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:36,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:21:36,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:36,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:21:36,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:21:36,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:21:36,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 624 transitions, 8602 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:36,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:36,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:21:36,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:37,904 INFO L124 PetriNetUnfolderBase]: 3705/5685 cut-off events. [2024-06-27 20:21:37,904 INFO L125 PetriNetUnfolderBase]: For 1781966/1781974 co-relation queries the response was YES. [2024-06-27 20:21:37,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70192 conditions, 5685 events. 3705/5685 cut-off events. For 1781966/1781974 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 32078 event pairs, 592 based on Foata normal form. 9/5693 useless extension candidates. Maximal degree in co-relation 69995. Up to 5193 conditions per place. [2024-06-27 20:21:38,005 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 569 selfloop transitions, 75 changer transitions 0/648 dead transitions. [2024-06-27 20:21:38,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 648 transitions, 10400 flow [2024-06-27 20:21:38,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:21:38,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:21:38,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-27 20:21:38,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-27 20:21:38,007 INFO L175 Difference]: Start difference. First operand has 416 places, 624 transitions, 8602 flow. Second operand 9 states and 148 transitions. [2024-06-27 20:21:38,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 648 transitions, 10400 flow [2024-06-27 20:21:43,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 648 transitions, 10085 flow, removed 106 selfloop flow, removed 7 redundant places. [2024-06-27 20:21:43,468 INFO L231 Difference]: Finished difference. Result has 419 places, 627 transitions, 8573 flow [2024-06-27 20:21:43,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8287, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8573, PETRI_PLACES=419, PETRI_TRANSITIONS=627} [2024-06-27 20:21:43,469 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 377 predicate places. [2024-06-27 20:21:43,469 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 627 transitions, 8573 flow [2024-06-27 20:21:43,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:43,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:43,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:43,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 20:21:43,469 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)] === [2024-06-27 20:21:43,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:43,470 INFO L85 PathProgramCache]: Analyzing trace with hash -692384809, now seen corresponding path program 2 times [2024-06-27 20:21:43,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:43,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000592805] [2024-06-27 20:21:43,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:43,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:43,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:44,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:44,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:44,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000592805] [2024-06-27 20:21:44,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000592805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:44,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:44,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:21:44,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048677983] [2024-06-27 20:21:44,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:44,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:21:44,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:44,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:21:44,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:21:44,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:21:44,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 627 transitions, 8573 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:44,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:44,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:21:44,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:45,883 INFO L124 PetriNetUnfolderBase]: 3731/5721 cut-off events. [2024-06-27 20:21:45,883 INFO L125 PetriNetUnfolderBase]: For 1805737/1805745 co-relation queries the response was YES. [2024-06-27 20:21:45,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70916 conditions, 5721 events. 3731/5721 cut-off events. For 1805737/1805745 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 32291 event pairs, 590 based on Foata normal form. 7/5727 useless extension candidates. Maximal degree in co-relation 70717. Up to 5234 conditions per place. [2024-06-27 20:21:45,987 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 562 selfloop transitions, 90 changer transitions 0/656 dead transitions. [2024-06-27 20:21:45,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 656 transitions, 10753 flow [2024-06-27 20:21:45,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:21:45,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:21:45,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-27 20:21:45,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-27 20:21:45,988 INFO L175 Difference]: Start difference. First operand has 419 places, 627 transitions, 8573 flow. Second operand 9 states and 148 transitions. [2024-06-27 20:21:45,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 656 transitions, 10753 flow [2024-06-27 20:21:52,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 656 transitions, 10608 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 20:21:52,115 INFO L231 Difference]: Finished difference. Result has 422 places, 637 transitions, 8936 flow [2024-06-27 20:21:52,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8428, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8936, PETRI_PLACES=422, PETRI_TRANSITIONS=637} [2024-06-27 20:21:52,115 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 380 predicate places. [2024-06-27 20:21:52,115 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 637 transitions, 8936 flow [2024-06-27 20:21:52,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:52,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:52,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:52,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 20:21:52,116 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)] === [2024-06-27 20:21:52,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:52,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1181147375, now seen corresponding path program 3 times [2024-06-27 20:21:52,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:52,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746997843] [2024-06-27 20:21:52,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:52,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:52,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:52,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:52,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:52,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746997843] [2024-06-27 20:21:52,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746997843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:52,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:52,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:21:52,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191367036] [2024-06-27 20:21:52,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:52,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:21:52,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:52,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:21:52,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:21:53,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:21:53,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 637 transitions, 8936 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:53,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:53,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:21:53,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:54,646 INFO L124 PetriNetUnfolderBase]: 3737/5730 cut-off events. [2024-06-27 20:21:54,646 INFO L125 PetriNetUnfolderBase]: For 1830261/1830269 co-relation queries the response was YES. [2024-06-27 20:21:54,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71161 conditions, 5730 events. 3737/5730 cut-off events. For 1830261/1830269 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 32330 event pairs, 590 based on Foata normal form. 9/5738 useless extension candidates. Maximal degree in co-relation 70960. Up to 5176 conditions per place. [2024-06-27 20:21:54,750 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 551 selfloop transitions, 106 changer transitions 0/661 dead transitions. [2024-06-27 20:21:54,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 661 transitions, 10902 flow [2024-06-27 20:21:54,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:21:54,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:21:54,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-27 20:21:54,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-27 20:21:54,751 INFO L175 Difference]: Start difference. First operand has 422 places, 637 transitions, 8936 flow. Second operand 9 states and 148 transitions. [2024-06-27 20:21:54,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 661 transitions, 10902 flow [2024-06-27 20:22:00,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 661 transitions, 10613 flow, removed 88 selfloop flow, removed 5 redundant places. [2024-06-27 20:22:00,450 INFO L231 Difference]: Finished difference. Result has 427 places, 642 transitions, 9183 flow [2024-06-27 20:22:00,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8647, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9183, PETRI_PLACES=427, PETRI_TRANSITIONS=642} [2024-06-27 20:22:00,451 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 385 predicate places. [2024-06-27 20:22:00,451 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 642 transitions, 9183 flow [2024-06-27 20:22:00,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:00,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:00,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:00,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 20:22:00,452 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)] === [2024-06-27 20:22:00,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:00,452 INFO L85 PathProgramCache]: Analyzing trace with hash -699736459, now seen corresponding path program 4 times [2024-06-27 20:22:00,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:00,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988780948] [2024-06-27 20:22:00,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:00,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:00,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:01,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:01,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:01,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988780948] [2024-06-27 20:22:01,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988780948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:01,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:01,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:22:01,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852952753] [2024-06-27 20:22:01,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:01,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:22:01,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:01,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:22:01,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:22:01,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:22:01,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 642 transitions, 9183 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:01,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:01,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:22:01,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:03,137 INFO L124 PetriNetUnfolderBase]: 3739/5735 cut-off events. [2024-06-27 20:22:03,137 INFO L125 PetriNetUnfolderBase]: For 1831240/1831248 co-relation queries the response was YES. [2024-06-27 20:22:03,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71388 conditions, 5735 events. 3739/5735 cut-off events. For 1831240/1831248 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 32391 event pairs, 590 based on Foata normal form. 7/5741 useless extension candidates. Maximal degree in co-relation 71185. Up to 5357 conditions per place. [2024-06-27 20:22:03,235 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 604 selfloop transitions, 54 changer transitions 0/662 dead transitions. [2024-06-27 20:22:03,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 662 transitions, 10660 flow [2024-06-27 20:22:03,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:22:03,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:22:03,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-27 20:22:03,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-27 20:22:03,251 INFO L175 Difference]: Start difference. First operand has 427 places, 642 transitions, 9183 flow. Second operand 9 states and 143 transitions. [2024-06-27 20:22:03,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 662 transitions, 10660 flow [2024-06-27 20:22:09,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 662 transitions, 10103 flow, removed 85 selfloop flow, removed 9 redundant places. [2024-06-27 20:22:09,338 INFO L231 Difference]: Finished difference. Result has 427 places, 645 transitions, 8858 flow [2024-06-27 20:22:09,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8628, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8858, PETRI_PLACES=427, PETRI_TRANSITIONS=645} [2024-06-27 20:22:09,339 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 385 predicate places. [2024-06-27 20:22:09,339 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 645 transitions, 8858 flow [2024-06-27 20:22:09,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:09,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:09,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:09,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 20:22:09,339 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)] === [2024-06-27 20:22:09,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:09,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1181537634, now seen corresponding path program 4 times [2024-06-27 20:22:09,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:09,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49997113] [2024-06-27 20:22:09,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:09,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:09,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:10,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:10,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:10,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49997113] [2024-06-27 20:22:10,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49997113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:10,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:10,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:22:10,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583096485] [2024-06-27 20:22:10,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:10,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:22:10,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:10,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:22:10,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:22:10,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:22:10,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 645 transitions, 8858 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:10,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:10,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:22:10,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:11,741 INFO L124 PetriNetUnfolderBase]: 3755/5757 cut-off events. [2024-06-27 20:22:11,742 INFO L125 PetriNetUnfolderBase]: For 1875129/1875137 co-relation queries the response was YES. [2024-06-27 20:22:11,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71143 conditions, 5757 events. 3755/5757 cut-off events. For 1875129/1875137 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 32521 event pairs, 592 based on Foata normal form. 9/5765 useless extension candidates. Maximal degree in co-relation 70941. Up to 5329 conditions per place. [2024-06-27 20:22:11,841 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 590 selfloop transitions, 72 changer transitions 0/666 dead transitions. [2024-06-27 20:22:11,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 666 transitions, 10404 flow [2024-06-27 20:22:11,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:22:11,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:22:11,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-27 20:22:11,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-27 20:22:11,843 INFO L175 Difference]: Start difference. First operand has 427 places, 645 transitions, 8858 flow. Second operand 9 states and 144 transitions. [2024-06-27 20:22:11,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 666 transitions, 10404 flow [2024-06-27 20:22:17,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 666 transitions, 10211 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-27 20:22:17,583 INFO L231 Difference]: Finished difference. Result has 429 places, 648 transitions, 8991 flow [2024-06-27 20:22:17,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8665, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8991, PETRI_PLACES=429, PETRI_TRANSITIONS=648} [2024-06-27 20:22:17,584 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 387 predicate places. [2024-06-27 20:22:17,584 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 648 transitions, 8991 flow [2024-06-27 20:22:17,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:17,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:17,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:17,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 20:22:17,585 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)] === [2024-06-27 20:22:17,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:17,585 INFO L85 PathProgramCache]: Analyzing trace with hash 174164266, now seen corresponding path program 5 times [2024-06-27 20:22:17,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:17,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876948090] [2024-06-27 20:22:17,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:17,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:17,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:18,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:18,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876948090] [2024-06-27 20:22:18,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876948090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:18,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:18,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:22:18,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210339264] [2024-06-27 20:22:18,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:18,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:22:18,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:18,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:22:18,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:22:18,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:22:18,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 648 transitions, 8991 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:18,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:18,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:22:18,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:20,062 INFO L124 PetriNetUnfolderBase]: 3771/5781 cut-off events. [2024-06-27 20:22:20,063 INFO L125 PetriNetUnfolderBase]: For 1908080/1908088 co-relation queries the response was YES. [2024-06-27 20:22:20,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71904 conditions, 5781 events. 3771/5781 cut-off events. For 1908080/1908088 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 32722 event pairs, 594 based on Foata normal form. 9/5789 useless extension candidates. Maximal degree in co-relation 71701. Up to 5399 conditions per place. [2024-06-27 20:22:20,172 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 611 selfloop transitions, 54 changer transitions 0/669 dead transitions. [2024-06-27 20:22:20,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 669 transitions, 10549 flow [2024-06-27 20:22:20,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:22:20,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:22:20,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-27 20:22:20,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-27 20:22:20,173 INFO L175 Difference]: Start difference. First operand has 429 places, 648 transitions, 8991 flow. Second operand 9 states and 143 transitions. [2024-06-27 20:22:20,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 669 transitions, 10549 flow [2024-06-27 20:22:26,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 669 transitions, 10245 flow, removed 82 selfloop flow, removed 7 redundant places. [2024-06-27 20:22:26,511 INFO L231 Difference]: Finished difference. Result has 431 places, 651 transitions, 8983 flow [2024-06-27 20:22:26,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8687, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8983, PETRI_PLACES=431, PETRI_TRANSITIONS=651} [2024-06-27 20:22:26,511 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 389 predicate places. [2024-06-27 20:22:26,511 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 651 transitions, 8983 flow [2024-06-27 20:22:26,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:26,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:26,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:26,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 20:22:26,512 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)] === [2024-06-27 20:22:26,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:26,512 INFO L85 PathProgramCache]: Analyzing trace with hash 174154966, now seen corresponding path program 6 times [2024-06-27 20:22:26,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:26,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035948154] [2024-06-27 20:22:26,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:26,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:26,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:27,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:27,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:27,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035948154] [2024-06-27 20:22:27,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035948154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:27,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:27,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:22:27,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879820971] [2024-06-27 20:22:27,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:27,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:22:27,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:27,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:22:27,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:22:27,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:22:27,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 651 transitions, 8983 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:27,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:27,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:22:27,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:29,037 INFO L124 PetriNetUnfolderBase]: 3787/5805 cut-off events. [2024-06-27 20:22:29,038 INFO L125 PetriNetUnfolderBase]: For 1935007/1935015 co-relation queries the response was YES. [2024-06-27 20:22:29,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72319 conditions, 5805 events. 3787/5805 cut-off events. For 1935007/1935015 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 32872 event pairs, 592 based on Foata normal form. 9/5813 useless extension candidates. Maximal degree in co-relation 72115. Up to 5413 conditions per place. [2024-06-27 20:22:29,147 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 616 selfloop transitions, 53 changer transitions 0/673 dead transitions. [2024-06-27 20:22:29,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 673 transitions, 10557 flow [2024-06-27 20:22:29,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:22:29,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:22:29,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-27 20:22:29,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-27 20:22:29,148 INFO L175 Difference]: Start difference. First operand has 431 places, 651 transitions, 8983 flow. Second operand 9 states and 143 transitions. [2024-06-27 20:22:29,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 673 transitions, 10557 flow [2024-06-27 20:22:35,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 673 transitions, 10283 flow, removed 85 selfloop flow, removed 7 redundant places. [2024-06-27 20:22:35,270 INFO L231 Difference]: Finished difference. Result has 433 places, 654 transitions, 9009 flow [2024-06-27 20:22:35,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8709, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9009, PETRI_PLACES=433, PETRI_TRANSITIONS=654} [2024-06-27 20:22:35,270 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 391 predicate places. [2024-06-27 20:22:35,270 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 654 transitions, 9009 flow [2024-06-27 20:22:35,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:35,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:35,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:35,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 20:22:35,271 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)] === [2024-06-27 20:22:35,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:35,272 INFO L85 PathProgramCache]: Analyzing trace with hash 185218060, now seen corresponding path program 1 times [2024-06-27 20:22:35,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:35,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958632550] [2024-06-27 20:22:35,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:35,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:35,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:36,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:36,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:36,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958632550] [2024-06-27 20:22:36,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958632550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:36,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:36,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:22:36,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786887565] [2024-06-27 20:22:36,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:36,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:22:36,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:36,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:22:36,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:22:36,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:22:36,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 654 transitions, 9009 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:36,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:36,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:22:36,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:38,284 INFO L124 PetriNetUnfolderBase]: 3797/5821 cut-off events. [2024-06-27 20:22:38,284 INFO L125 PetriNetUnfolderBase]: For 1937286/1937294 co-relation queries the response was YES. [2024-06-27 20:22:38,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72560 conditions, 5821 events. 3797/5821 cut-off events. For 1937286/1937294 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 32979 event pairs, 596 based on Foata normal form. 7/5827 useless extension candidates. Maximal degree in co-relation 72355. Up to 5327 conditions per place. [2024-06-27 20:22:38,386 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 575 selfloop transitions, 98 changer transitions 0/677 dead transitions. [2024-06-27 20:22:38,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 677 transitions, 10868 flow [2024-06-27 20:22:38,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:22:38,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:22:38,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-27 20:22:38,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-27 20:22:38,388 INFO L175 Difference]: Start difference. First operand has 433 places, 654 transitions, 9009 flow. Second operand 10 states and 160 transitions. [2024-06-27 20:22:38,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 677 transitions, 10868 flow [2024-06-27 20:22:44,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 677 transitions, 10590 flow, removed 88 selfloop flow, removed 7 redundant places. [2024-06-27 20:22:44,726 INFO L231 Difference]: Finished difference. Result has 436 places, 658 transitions, 9113 flow [2024-06-27 20:22:44,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8731, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9113, PETRI_PLACES=436, PETRI_TRANSITIONS=658} [2024-06-27 20:22:44,727 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-06-27 20:22:44,727 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 658 transitions, 9113 flow [2024-06-27 20:22:44,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:44,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:44,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:44,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-27 20:22:44,728 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)] === [2024-06-27 20:22:44,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:44,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1181137455, now seen corresponding path program 1 times [2024-06-27 20:22:44,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:44,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644573904] [2024-06-27 20:22:44,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:44,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:44,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:46,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:46,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:46,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644573904] [2024-06-27 20:22:46,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644573904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:46,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:46,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:22:46,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618101807] [2024-06-27 20:22:46,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:46,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:22:46,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:46,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:22:46,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:22:46,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:22:46,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 658 transitions, 9113 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:46,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:46,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:22:46,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:47,740 INFO L124 PetriNetUnfolderBase]: 3805/5834 cut-off events. [2024-06-27 20:22:47,741 INFO L125 PetriNetUnfolderBase]: For 1964763/1964769 co-relation queries the response was YES. [2024-06-27 20:22:47,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72853 conditions, 5834 events. 3805/5834 cut-off events. For 1964763/1964769 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 33004 event pairs, 609 based on Foata normal form. 8/5841 useless extension candidates. Maximal degree in co-relation 72647. Up to 5614 conditions per place. [2024-06-27 20:22:47,854 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 651 selfloop transitions, 25 changer transitions 0/680 dead transitions. [2024-06-27 20:22:47,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 680 transitions, 10692 flow [2024-06-27 20:22:47,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:22:47,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:22:47,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 147 transitions. [2024-06-27 20:22:47,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35853658536585364 [2024-06-27 20:22:47,856 INFO L175 Difference]: Start difference. First operand has 436 places, 658 transitions, 9113 flow. Second operand 10 states and 147 transitions. [2024-06-27 20:22:47,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 680 transitions, 10692 flow [2024-06-27 20:22:53,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 680 transitions, 10351 flow, removed 75 selfloop flow, removed 8 redundant places. [2024-06-27 20:22:53,845 INFO L231 Difference]: Finished difference. Result has 438 places, 660 transitions, 8995 flow [2024-06-27 20:22:53,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8772, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8995, PETRI_PLACES=438, PETRI_TRANSITIONS=660} [2024-06-27 20:22:53,846 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 396 predicate places. [2024-06-27 20:22:53,846 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 660 transitions, 8995 flow [2024-06-27 20:22:53,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:53,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:53,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:53,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-27 20:22:53,847 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)] === [2024-06-27 20:22:53,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:53,847 INFO L85 PathProgramCache]: Analyzing trace with hash 195881518, now seen corresponding path program 2 times [2024-06-27 20:22:53,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:53,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258281672] [2024-06-27 20:22:53,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:53,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:53,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:55,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:55,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:55,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258281672] [2024-06-27 20:22:55,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258281672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:55,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:55,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:22:55,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495130734] [2024-06-27 20:22:55,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:55,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:22:55,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:55,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:22:55,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:22:55,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:22:55,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 660 transitions, 8995 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:55,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:55,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:22:55,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:56,841 INFO L124 PetriNetUnfolderBase]: 3817/5848 cut-off events. [2024-06-27 20:22:56,841 INFO L125 PetriNetUnfolderBase]: For 1992743/1992751 co-relation queries the response was YES. [2024-06-27 20:22:56,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73016 conditions, 5848 events. 3817/5848 cut-off events. For 1992743/1992751 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 33132 event pairs, 596 based on Foata normal form. 7/5854 useless extension candidates. Maximal degree in co-relation 72809. Up to 5355 conditions per place. [2024-06-27 20:22:56,943 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 581 selfloop transitions, 98 changer transitions 0/683 dead transitions. [2024-06-27 20:22:56,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 683 transitions, 10878 flow [2024-06-27 20:22:56,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:22:56,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:22:56,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-27 20:22:56,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3878048780487805 [2024-06-27 20:22:56,944 INFO L175 Difference]: Start difference. First operand has 438 places, 660 transitions, 8995 flow. Second operand 10 states and 159 transitions. [2024-06-27 20:22:56,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 683 transitions, 10878 flow [2024-06-27 20:23:03,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 683 transitions, 10671 flow, removed 80 selfloop flow, removed 8 redundant places. [2024-06-27 20:23:03,114 INFO L231 Difference]: Finished difference. Result has 440 places, 664 transitions, 9178 flow [2024-06-27 20:23:03,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8788, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9178, PETRI_PLACES=440, PETRI_TRANSITIONS=664} [2024-06-27 20:23:03,115 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 398 predicate places. [2024-06-27 20:23:03,115 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 664 transitions, 9178 flow [2024-06-27 20:23:03,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:03,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:03,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:03,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-27 20:23:03,116 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)] === [2024-06-27 20:23:03,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:03,116 INFO L85 PathProgramCache]: Analyzing trace with hash 195894538, now seen corresponding path program 3 times [2024-06-27 20:23:03,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:03,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82093544] [2024-06-27 20:23:03,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:03,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:03,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:04,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:04,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:04,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82093544] [2024-06-27 20:23:04,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82093544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:04,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:04,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:23:04,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7361489] [2024-06-27 20:23:04,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:04,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:23:04,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:04,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:23:04,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:23:04,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:23:04,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 664 transitions, 9178 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:04,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:04,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:23:04,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:05,923 INFO L124 PetriNetUnfolderBase]: 3819/5856 cut-off events. [2024-06-27 20:23:05,924 INFO L125 PetriNetUnfolderBase]: For 2001399/2001407 co-relation queries the response was YES. [2024-06-27 20:23:06,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73124 conditions, 5856 events. 3819/5856 cut-off events. For 2001399/2001407 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 33182 event pairs, 596 based on Foata normal form. 7/5862 useless extension candidates. Maximal degree in co-relation 72916. Up to 5287 conditions per place. [2024-06-27 20:23:06,033 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 567 selfloop transitions, 117 changer transitions 0/688 dead transitions. [2024-06-27 20:23:06,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 688 transitions, 11353 flow [2024-06-27 20:23:06,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:23:06,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:23:06,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-27 20:23:06,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3926829268292683 [2024-06-27 20:23:06,034 INFO L175 Difference]: Start difference. First operand has 440 places, 664 transitions, 9178 flow. Second operand 10 states and 161 transitions. [2024-06-27 20:23:06,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 688 transitions, 11353 flow [2024-06-27 20:23:12,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 688 transitions, 11040 flow, removed 79 selfloop flow, removed 7 redundant places. [2024-06-27 20:23:12,121 INFO L231 Difference]: Finished difference. Result has 444 places, 668 transitions, 9308 flow [2024-06-27 20:23:12,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8865, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9308, PETRI_PLACES=444, PETRI_TRANSITIONS=668} [2024-06-27 20:23:12,122 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 402 predicate places. [2024-06-27 20:23:12,122 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 668 transitions, 9308 flow [2024-06-27 20:23:12,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:12,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:12,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:12,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-27 20:23:12,122 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)] === [2024-06-27 20:23:12,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:12,123 INFO L85 PathProgramCache]: Analyzing trace with hash -349544431, now seen corresponding path program 2 times [2024-06-27 20:23:12,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:12,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930289790] [2024-06-27 20:23:12,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:12,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:12,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:12,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:12,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:12,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930289790] [2024-06-27 20:23:12,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930289790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:12,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:12,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:23:12,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9102220] [2024-06-27 20:23:12,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:12,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:23:12,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:12,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:23:12,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:23:12,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:23:12,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 668 transitions, 9308 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:12,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:12,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:23:12,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:14,664 INFO L124 PetriNetUnfolderBase]: 3824/5841 cut-off events. [2024-06-27 20:23:14,665 INFO L125 PetriNetUnfolderBase]: For 2018725/2018733 co-relation queries the response was YES. [2024-06-27 20:23:14,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73463 conditions, 5841 events. 3824/5841 cut-off events. For 2018725/2018733 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 32926 event pairs, 630 based on Foata normal form. 3/5834 useless extension candidates. Maximal degree in co-relation 73253. Up to 5225 conditions per place. [2024-06-27 20:23:14,772 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 588 selfloop transitions, 101 changer transitions 0/693 dead transitions. [2024-06-27 20:23:14,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 693 transitions, 10886 flow [2024-06-27 20:23:14,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:14,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:14,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 20:23:14,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-27 20:23:14,773 INFO L175 Difference]: Start difference. First operand has 444 places, 668 transitions, 9308 flow. Second operand 8 states and 139 transitions. [2024-06-27 20:23:14,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 693 transitions, 10886 flow [2024-06-27 20:23:21,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 693 transitions, 10472 flow, removed 111 selfloop flow, removed 7 redundant places. [2024-06-27 20:23:21,528 INFO L231 Difference]: Finished difference. Result has 445 places, 671 transitions, 9220 flow [2024-06-27 20:23:21,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8894, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9220, PETRI_PLACES=445, PETRI_TRANSITIONS=671} [2024-06-27 20:23:21,529 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 403 predicate places. [2024-06-27 20:23:21,529 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 671 transitions, 9220 flow [2024-06-27 20:23:21,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:21,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:21,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:21,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-27 20:23:21,530 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)] === [2024-06-27 20:23:21,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:21,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1201267261, now seen corresponding path program 3 times [2024-06-27 20:23:21,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:21,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636754901] [2024-06-27 20:23:21,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:21,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:21,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:22,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:22,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:22,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636754901] [2024-06-27 20:23:22,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636754901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:22,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:22,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:23:22,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436150191] [2024-06-27 20:23:22,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:22,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:23:22,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:22,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:23:22,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:23:22,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:23:22,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 671 transitions, 9220 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:22,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:22,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:23:22,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:24,230 INFO L124 PetriNetUnfolderBase]: 3821/5832 cut-off events. [2024-06-27 20:23:24,230 INFO L125 PetriNetUnfolderBase]: For 2029516/2029520 co-relation queries the response was YES. [2024-06-27 20:23:24,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73167 conditions, 5832 events. 3821/5832 cut-off events. For 2029516/2029520 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 32825 event pairs, 616 based on Foata normal form. 2/5827 useless extension candidates. Maximal degree in co-relation 72956. Up to 5221 conditions per place. [2024-06-27 20:23:24,338 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 587 selfloop transitions, 103 changer transitions 0/694 dead transitions. [2024-06-27 20:23:24,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 694 transitions, 10698 flow [2024-06-27 20:23:24,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:24,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:24,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 20:23:24,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-27 20:23:24,339 INFO L175 Difference]: Start difference. First operand has 445 places, 671 transitions, 9220 flow. Second operand 8 states and 138 transitions. [2024-06-27 20:23:24,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 694 transitions, 10698 flow [2024-06-27 20:23:32,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 694 transitions, 10364 flow, removed 71 selfloop flow, removed 6 redundant places. [2024-06-27 20:23:32,007 INFO L231 Difference]: Finished difference. Result has 447 places, 671 transitions, 9104 flow [2024-06-27 20:23:32,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8886, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9104, PETRI_PLACES=447, PETRI_TRANSITIONS=671} [2024-06-27 20:23:32,008 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 405 predicate places. [2024-06-27 20:23:32,008 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 671 transitions, 9104 flow [2024-06-27 20:23:32,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:32,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:32,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:32,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-27 20:23:32,009 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)] === [2024-06-27 20:23:32,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:32,009 INFO L85 PathProgramCache]: Analyzing trace with hash -290935405, now seen corresponding path program 4 times [2024-06-27 20:23:32,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:32,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276811719] [2024-06-27 20:23:32,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:32,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:32,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:32,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:32,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:32,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276811719] [2024-06-27 20:23:32,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276811719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:32,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:32,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:23:32,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115543955] [2024-06-27 20:23:32,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:32,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:23:32,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:32,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:23:32,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:23:32,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:23:32,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 671 transitions, 9104 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:32,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:32,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:23:32,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:34,501 INFO L124 PetriNetUnfolderBase]: 3818/5828 cut-off events. [2024-06-27 20:23:34,502 INFO L125 PetriNetUnfolderBase]: For 2041205/2041209 co-relation queries the response was YES. [2024-06-27 20:23:34,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73050 conditions, 5828 events. 3818/5828 cut-off events. For 2041205/2041209 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 32823 event pairs, 609 based on Foata normal form. 2/5823 useless extension candidates. Maximal degree in co-relation 72838. Up to 5150 conditions per place. [2024-06-27 20:23:34,616 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 561 selfloop transitions, 127 changer transitions 0/692 dead transitions. [2024-06-27 20:23:34,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 692 transitions, 10580 flow [2024-06-27 20:23:34,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:34,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:34,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 20:23:34,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-27 20:23:34,617 INFO L175 Difference]: Start difference. First operand has 447 places, 671 transitions, 9104 flow. Second operand 8 states and 137 transitions. [2024-06-27 20:23:34,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 692 transitions, 10580 flow [2024-06-27 20:23:43,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 692 transitions, 10247 flow, removed 43 selfloop flow, removed 8 redundant places. [2024-06-27 20:23:43,038 INFO L231 Difference]: Finished difference. Result has 447 places, 671 transitions, 9035 flow [2024-06-27 20:23:43,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8771, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9035, PETRI_PLACES=447, PETRI_TRANSITIONS=671} [2024-06-27 20:23:43,038 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 405 predicate places. [2024-06-27 20:23:43,038 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 671 transitions, 9035 flow [2024-06-27 20:23:43,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:43,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:43,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:43,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-27 20:23:43,039 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)] === [2024-06-27 20:23:43,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:43,040 INFO L85 PathProgramCache]: Analyzing trace with hash 316672206, now seen corresponding path program 7 times [2024-06-27 20:23:43,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:43,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423541946] [2024-06-27 20:23:43,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:43,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:43,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:43,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:43,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:43,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423541946] [2024-06-27 20:23:43,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423541946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:43,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:43,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:23:43,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579933341] [2024-06-27 20:23:43,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:43,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:23:43,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:43,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:23:43,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:23:43,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:23:43,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 671 transitions, 9035 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:43,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:43,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:23:43,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:45,411 INFO L124 PetriNetUnfolderBase]: 3828/5847 cut-off events. [2024-06-27 20:23:45,412 INFO L125 PetriNetUnfolderBase]: For 2084364/2084368 co-relation queries the response was YES. [2024-06-27 20:23:45,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73437 conditions, 5847 events. 3828/5847 cut-off events. For 2084364/2084368 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 32933 event pairs, 629 based on Foata normal form. 3/5843 useless extension candidates. Maximal degree in co-relation 73225. Up to 5228 conditions per place. [2024-06-27 20:23:45,718 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 592 selfloop transitions, 102 changer transitions 0/698 dead transitions. [2024-06-27 20:23:45,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 698 transitions, 10665 flow [2024-06-27 20:23:45,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:23:45,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:23:45,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-27 20:23:45,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-27 20:23:45,719 INFO L175 Difference]: Start difference. First operand has 447 places, 671 transitions, 9035 flow. Second operand 9 states and 151 transitions. [2024-06-27 20:23:45,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 698 transitions, 10665 flow [2024-06-27 20:23:52,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 698 transitions, 10319 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 20:23:52,706 INFO L231 Difference]: Finished difference. Result has 447 places, 674 transitions, 9037 flow [2024-06-27 20:23:52,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8689, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9037, PETRI_PLACES=447, PETRI_TRANSITIONS=674} [2024-06-27 20:23:52,706 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 405 predicate places. [2024-06-27 20:23:52,707 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 674 transitions, 9037 flow [2024-06-27 20:23:52,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:52,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:52,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:52,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-27 20:23:52,707 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)] === [2024-06-27 20:23:52,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:52,708 INFO L85 PathProgramCache]: Analyzing trace with hash -974240934, now seen corresponding path program 7 times [2024-06-27 20:23:52,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:52,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700395214] [2024-06-27 20:23:52,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:52,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:52,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:53,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:53,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:53,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700395214] [2024-06-27 20:23:53,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700395214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:53,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:53,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:53,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310033675] [2024-06-27 20:23:53,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:53,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:53,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:53,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:53,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:53,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:23:53,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 674 transitions, 9037 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:53,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:53,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:23:53,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:54,915 INFO L124 PetriNetUnfolderBase]: 3830/5868 cut-off events. [2024-06-27 20:23:54,916 INFO L125 PetriNetUnfolderBase]: For 2101118/2101126 co-relation queries the response was YES. [2024-06-27 20:23:54,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73467 conditions, 5868 events. 3830/5868 cut-off events. For 2101118/2101126 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 33142 event pairs, 658 based on Foata normal form. 7/5873 useless extension candidates. Maximal degree in co-relation 73255. Up to 5239 conditions per place. [2024-06-27 20:23:55,022 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 603 selfloop transitions, 96 changer transitions 0/703 dead transitions. [2024-06-27 20:23:55,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 703 transitions, 10691 flow [2024-06-27 20:23:55,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:55,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:55,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 20:23:55,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-27 20:23:55,024 INFO L175 Difference]: Start difference. First operand has 447 places, 674 transitions, 9037 flow. Second operand 8 states and 133 transitions. [2024-06-27 20:23:55,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 703 transitions, 10691 flow [2024-06-27 20:24:02,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 703 transitions, 10361 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-27 20:24:02,224 INFO L231 Difference]: Finished difference. Result has 449 places, 682 transitions, 9096 flow [2024-06-27 20:24:02,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8715, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9096, PETRI_PLACES=449, PETRI_TRANSITIONS=682} [2024-06-27 20:24:02,224 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 407 predicate places. [2024-06-27 20:24:02,225 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 682 transitions, 9096 flow [2024-06-27 20:24:02,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:02,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:02,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:02,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-27 20:24:02,225 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)] === [2024-06-27 20:24:02,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:02,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1874453380, now seen corresponding path program 8 times [2024-06-27 20:24:02,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:02,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807449395] [2024-06-27 20:24:02,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:02,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:02,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:02,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:02,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:02,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807449395] [2024-06-27 20:24:02,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807449395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:02,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:02,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:24:02,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797081068] [2024-06-27 20:24:02,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:02,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:24:02,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:02,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:24:02,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:24:02,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:24:02,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 682 transitions, 9096 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:02,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:02,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:24:02,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:04,473 INFO L124 PetriNetUnfolderBase]: 3832/5874 cut-off events. [2024-06-27 20:24:04,473 INFO L125 PetriNetUnfolderBase]: For 2115201/2115209 co-relation queries the response was YES. [2024-06-27 20:24:04,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73646 conditions, 5874 events. 3832/5874 cut-off events. For 2115201/2115209 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 33337 event pairs, 663 based on Foata normal form. 7/5879 useless extension candidates. Maximal degree in co-relation 73432. Up to 5226 conditions per place. [2024-06-27 20:24:04,597 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 599 selfloop transitions, 101 changer transitions 0/704 dead transitions. [2024-06-27 20:24:04,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 704 transitions, 10676 flow [2024-06-27 20:24:04,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:24:04,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:24:04,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 20:24:04,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-27 20:24:04,599 INFO L175 Difference]: Start difference. First operand has 449 places, 682 transitions, 9096 flow. Second operand 8 states and 133 transitions. [2024-06-27 20:24:04,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 704 transitions, 10676 flow [2024-06-27 20:24:12,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 704 transitions, 10478 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-27 20:24:12,645 INFO L231 Difference]: Finished difference. Result has 453 places, 685 transitions, 9206 flow [2024-06-27 20:24:12,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8898, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9206, PETRI_PLACES=453, PETRI_TRANSITIONS=685} [2024-06-27 20:24:12,646 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 411 predicate places. [2024-06-27 20:24:12,646 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 685 transitions, 9206 flow [2024-06-27 20:24:12,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:12,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:12,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:12,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-27 20:24:12,646 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)] === [2024-06-27 20:24:12,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:12,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1874453008, now seen corresponding path program 8 times [2024-06-27 20:24:12,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:12,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784311294] [2024-06-27 20:24:12,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:12,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:12,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:13,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:13,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:13,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784311294] [2024-06-27 20:24:13,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784311294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:13,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:13,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:24:13,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310813463] [2024-06-27 20:24:13,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:13,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:24:13,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:13,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:24:13,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:24:13,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:24:13,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 685 transitions, 9206 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:13,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:13,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:24:13,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:15,176 INFO L124 PetriNetUnfolderBase]: 3842/5872 cut-off events. [2024-06-27 20:24:15,177 INFO L125 PetriNetUnfolderBase]: For 2145006/2145010 co-relation queries the response was YES. [2024-06-27 20:24:15,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74028 conditions, 5872 events. 3842/5872 cut-off events. For 2145006/2145010 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 33216 event pairs, 627 based on Foata normal form. 3/5868 useless extension candidates. Maximal degree in co-relation 73812. Up to 5248 conditions per place. [2024-06-27 20:24:15,291 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 598 selfloop transitions, 110 changer transitions 0/712 dead transitions. [2024-06-27 20:24:15,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 712 transitions, 10864 flow [2024-06-27 20:24:15,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:24:15,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:24:15,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 20:24:15,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-27 20:24:15,295 INFO L175 Difference]: Start difference. First operand has 453 places, 685 transitions, 9206 flow. Second operand 9 states and 150 transitions. [2024-06-27 20:24:15,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 712 transitions, 10864 flow [2024-06-27 20:24:23,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 712 transitions, 10594 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-27 20:24:23,483 INFO L231 Difference]: Finished difference. Result has 456 places, 688 transitions, 9306 flow [2024-06-27 20:24:23,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8936, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9306, PETRI_PLACES=456, PETRI_TRANSITIONS=688} [2024-06-27 20:24:23,484 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 414 predicate places. [2024-06-27 20:24:23,484 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 688 transitions, 9306 flow [2024-06-27 20:24:23,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:23,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:23,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:23,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-27 20:24:23,485 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)] === [2024-06-27 20:24:23,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:23,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1173373042, now seen corresponding path program 9 times [2024-06-27 20:24:23,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:23,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305428710] [2024-06-27 20:24:23,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:23,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:23,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:24,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:24,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:24,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305428710] [2024-06-27 20:24:24,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305428710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:24,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:24,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:24:24,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59041888] [2024-06-27 20:24:24,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:24,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:24:24,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:24,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:24:24,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:24:24,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:24:24,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 688 transitions, 9306 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:24,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:24,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:24:24,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:26,028 INFO L124 PetriNetUnfolderBase]: 3852/5884 cut-off events. [2024-06-27 20:24:26,028 INFO L125 PetriNetUnfolderBase]: For 2175318/2175322 co-relation queries the response was YES. [2024-06-27 20:24:26,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74541 conditions, 5884 events. 3852/5884 cut-off events. For 2175318/2175322 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 33241 event pairs, 609 based on Foata normal form. 3/5880 useless extension candidates. Maximal degree in co-relation 74324. Up to 5220 conditions per place. [2024-06-27 20:24:26,133 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 587 selfloop transitions, 122 changer transitions 0/713 dead transitions. [2024-06-27 20:24:26,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 713 transitions, 10976 flow [2024-06-27 20:24:26,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:24:26,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:24:26,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 20:24:26,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-27 20:24:26,135 INFO L175 Difference]: Start difference. First operand has 456 places, 688 transitions, 9306 flow. Second operand 9 states and 150 transitions. [2024-06-27 20:24:26,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 713 transitions, 10976 flow [2024-06-27 20:24:34,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 713 transitions, 10632 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-06-27 20:24:34,356 INFO L231 Difference]: Finished difference. Result has 458 places, 691 transitions, 9362 flow [2024-06-27 20:24:34,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8962, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9362, PETRI_PLACES=458, PETRI_TRANSITIONS=691} [2024-06-27 20:24:34,356 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 416 predicate places. [2024-06-27 20:24:34,357 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 691 transitions, 9362 flow [2024-06-27 20:24:34,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:34,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:34,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:34,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-27 20:24:34,357 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)] === [2024-06-27 20:24:34,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:34,358 INFO L85 PathProgramCache]: Analyzing trace with hash -204510722, now seen corresponding path program 9 times [2024-06-27 20:24:34,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:34,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628933214] [2024-06-27 20:24:34,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:34,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:34,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:34,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:34,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:34,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628933214] [2024-06-27 20:24:34,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628933214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:34,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:34,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:24:34,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383880251] [2024-06-27 20:24:34,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:34,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:24:34,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:34,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:24:34,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:24:35,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:24:35,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 691 transitions, 9362 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:35,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:35,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:24:35,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:36,628 INFO L124 PetriNetUnfolderBase]: 3862/5925 cut-off events. [2024-06-27 20:24:36,629 INFO L125 PetriNetUnfolderBase]: For 2202220/2202228 co-relation queries the response was YES. [2024-06-27 20:24:36,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75065 conditions, 5925 events. 3862/5925 cut-off events. For 2202220/2202228 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 33703 event pairs, 657 based on Foata normal form. 7/5930 useless extension candidates. Maximal degree in co-relation 74847. Up to 5190 conditions per place. [2024-06-27 20:24:36,741 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 585 selfloop transitions, 122 changer transitions 0/711 dead transitions. [2024-06-27 20:24:36,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 711 transitions, 10945 flow [2024-06-27 20:24:36,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:24:36,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:24:36,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 20:24:36,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-27 20:24:36,743 INFO L175 Difference]: Start difference. First operand has 458 places, 691 transitions, 9362 flow. Second operand 8 states and 131 transitions. [2024-06-27 20:24:36,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 711 transitions, 10945 flow [2024-06-27 20:24:45,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 711 transitions, 10567 flow, removed 69 selfloop flow, removed 7 redundant places. [2024-06-27 20:24:45,438 INFO L231 Difference]: Finished difference. Result has 459 places, 694 transitions, 9319 flow [2024-06-27 20:24:45,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8984, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=691, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9319, PETRI_PLACES=459, PETRI_TRANSITIONS=694} [2024-06-27 20:24:45,439 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 417 predicate places. [2024-06-27 20:24:45,439 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 694 transitions, 9319 flow [2024-06-27 20:24:45,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:45,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:45,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:45,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-27 20:24:45,440 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)] === [2024-06-27 20:24:45,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:45,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1519774258, now seen corresponding path program 10 times [2024-06-27 20:24:45,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:45,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324024137] [2024-06-27 20:24:45,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:45,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:45,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:46,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:46,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:46,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324024137] [2024-06-27 20:24:46,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324024137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:46,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:46,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:24:46,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902163947] [2024-06-27 20:24:46,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:46,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:24:46,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:46,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:24:46,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:24:46,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:24:46,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 694 transitions, 9319 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:46,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:46,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:24:46,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:47,923 INFO L124 PetriNetUnfolderBase]: 3872/5912 cut-off events. [2024-06-27 20:24:47,923 INFO L125 PetriNetUnfolderBase]: For 2231614/2231618 co-relation queries the response was YES. [2024-06-27 20:24:48,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75266 conditions, 5912 events. 3872/5912 cut-off events. For 2231614/2231618 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 33427 event pairs, 609 based on Foata normal form. 3/5908 useless extension candidates. Maximal degree in co-relation 75047. Up to 5200 conditions per place. [2024-06-27 20:24:48,033 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 581 selfloop transitions, 137 changer transitions 0/722 dead transitions. [2024-06-27 20:24:48,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 722 transitions, 11059 flow [2024-06-27 20:24:48,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:24:48,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:24:48,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 20:24:48,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-27 20:24:48,035 INFO L175 Difference]: Start difference. First operand has 459 places, 694 transitions, 9319 flow. Second operand 9 states and 152 transitions. [2024-06-27 20:24:48,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 722 transitions, 11059 flow [2024-06-27 20:24:56,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 722 transitions, 10755 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 20:24:56,246 INFO L231 Difference]: Finished difference. Result has 463 places, 700 transitions, 9522 flow [2024-06-27 20:24:56,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9015, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9522, PETRI_PLACES=463, PETRI_TRANSITIONS=700} [2024-06-27 20:24:56,246 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 421 predicate places. [2024-06-27 20:24:56,247 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 700 transitions, 9522 flow [2024-06-27 20:24:56,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:56,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:56,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:56,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-27 20:24:56,247 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)] === [2024-06-27 20:24:56,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:56,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1750159270, now seen corresponding path program 11 times [2024-06-27 20:24:56,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:56,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383345941] [2024-06-27 20:24:56,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:56,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:56,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:56,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:56,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:56,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383345941] [2024-06-27 20:24:56,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383345941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:56,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:56,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:24:56,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392606528] [2024-06-27 20:24:56,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:56,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:24:56,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:56,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:24:56,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:24:57,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:24:57,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 700 transitions, 9522 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:57,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:57,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:24:57,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:58,734 INFO L124 PetriNetUnfolderBase]: 3866/5917 cut-off events. [2024-06-27 20:24:58,735 INFO L125 PetriNetUnfolderBase]: For 2239055/2239059 co-relation queries the response was YES. [2024-06-27 20:24:58,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75374 conditions, 5917 events. 3866/5917 cut-off events. For 2239055/2239059 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 33527 event pairs, 601 based on Foata normal form. 3/5917 useless extension candidates. Maximal degree in co-relation 75153. Up to 5592 conditions per place. [2024-06-27 20:24:58,843 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 677 selfloop transitions, 42 changer transitions 0/723 dead transitions. [2024-06-27 20:24:58,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 723 transitions, 11178 flow [2024-06-27 20:24:58,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:24:58,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:24:58,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-27 20:24:58,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-27 20:24:58,844 INFO L175 Difference]: Start difference. First operand has 463 places, 700 transitions, 9522 flow. Second operand 9 states and 141 transitions. [2024-06-27 20:24:58,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 723 transitions, 11178 flow [2024-06-27 20:25:06,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 723 transitions, 10857 flow, removed 85 selfloop flow, removed 5 redundant places. [2024-06-27 20:25:06,903 INFO L231 Difference]: Finished difference. Result has 467 places, 703 transitions, 9437 flow [2024-06-27 20:25:06,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9201, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=658, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9437, PETRI_PLACES=467, PETRI_TRANSITIONS=703} [2024-06-27 20:25:06,904 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 425 predicate places. [2024-06-27 20:25:06,904 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 703 transitions, 9437 flow [2024-06-27 20:25:06,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:06,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:06,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:06,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-27 20:25:06,905 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)] === [2024-06-27 20:25:06,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:06,905 INFO L85 PathProgramCache]: Analyzing trace with hash 969950419, now seen corresponding path program 5 times [2024-06-27 20:25:06,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:06,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497759523] [2024-06-27 20:25:06,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:06,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:06,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:07,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:07,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:07,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497759523] [2024-06-27 20:25:07,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497759523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:07,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:07,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:25:07,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423953985] [2024-06-27 20:25:07,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:07,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:25:07,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:07,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:25:07,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:25:07,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:25:07,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 703 transitions, 9437 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:07,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:07,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:25:07,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:09,245 INFO L124 PetriNetUnfolderBase]: 3864/5919 cut-off events. [2024-06-27 20:25:09,245 INFO L125 PetriNetUnfolderBase]: For 2250238/2250242 co-relation queries the response was YES. [2024-06-27 20:25:09,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75190 conditions, 5919 events. 3864/5919 cut-off events. For 2250238/2250242 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 33573 event pairs, 606 based on Foata normal form. 3/5919 useless extension candidates. Maximal degree in co-relation 74967. Up to 5589 conditions per place. [2024-06-27 20:25:09,354 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 678 selfloop transitions, 44 changer transitions 0/726 dead transitions. [2024-06-27 20:25:09,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 726 transitions, 11095 flow [2024-06-27 20:25:09,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:25:09,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:25:09,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-27 20:25:09,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-27 20:25:09,356 INFO L175 Difference]: Start difference. First operand has 467 places, 703 transitions, 9437 flow. Second operand 9 states and 141 transitions. [2024-06-27 20:25:09,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 726 transitions, 11095 flow [2024-06-27 20:25:16,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 726 transitions, 10821 flow, removed 97 selfloop flow, removed 7 redundant places. [2024-06-27 20:25:16,922 INFO L231 Difference]: Finished difference. Result has 469 places, 706 transitions, 9397 flow [2024-06-27 20:25:16,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9175, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=659, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9397, PETRI_PLACES=469, PETRI_TRANSITIONS=706} [2024-06-27 20:25:16,922 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 427 predicate places. [2024-06-27 20:25:16,923 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 706 transitions, 9397 flow [2024-06-27 20:25:16,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:16,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:16,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:16,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-27 20:25:16,923 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)] === [2024-06-27 20:25:16,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:16,924 INFO L85 PathProgramCache]: Analyzing trace with hash 320391276, now seen corresponding path program 12 times [2024-06-27 20:25:16,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:16,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825828096] [2024-06-27 20:25:16,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:16,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:16,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:17,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:17,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:17,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825828096] [2024-06-27 20:25:17,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825828096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:17,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:17,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:25:17,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145226018] [2024-06-27 20:25:17,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:17,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:25:17,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:17,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:25:17,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:25:17,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:25:17,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 706 transitions, 9397 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:17,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:17,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:25:17,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:19,505 INFO L124 PetriNetUnfolderBase]: 3866/5908 cut-off events. [2024-06-27 20:25:19,505 INFO L125 PetriNetUnfolderBase]: For 2263104/2263108 co-relation queries the response was YES. [2024-06-27 20:25:19,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74949 conditions, 5908 events. 3866/5908 cut-off events. For 2263104/2263108 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 33446 event pairs, 638 based on Foata normal form. 3/5904 useless extension candidates. Maximal degree in co-relation 74725. Up to 5253 conditions per place. [2024-06-27 20:25:19,608 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 607 selfloop transitions, 119 changer transitions 0/730 dead transitions. [2024-06-27 20:25:19,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 730 transitions, 11103 flow [2024-06-27 20:25:19,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:25:19,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:25:19,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 20:25:19,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-27 20:25:19,609 INFO L175 Difference]: Start difference. First operand has 469 places, 706 transitions, 9397 flow. Second operand 9 states and 150 transitions. [2024-06-27 20:25:19,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 730 transitions, 11103 flow [2024-06-27 20:25:26,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 730 transitions, 10911 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-27 20:25:26,772 INFO L231 Difference]: Finished difference. Result has 471 places, 709 transitions, 9605 flow [2024-06-27 20:25:26,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9205, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9605, PETRI_PLACES=471, PETRI_TRANSITIONS=709} [2024-06-27 20:25:26,773 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 429 predicate places. [2024-06-27 20:25:26,773 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 709 transitions, 9605 flow [2024-06-27 20:25:26,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:26,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:26,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:26,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-27 20:25:26,773 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)] === [2024-06-27 20:25:26,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:26,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1569463782, now seen corresponding path program 13 times [2024-06-27 20:25:26,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:26,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801453187] [2024-06-27 20:25:26,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:26,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:26,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:27,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:27,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:27,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801453187] [2024-06-27 20:25:27,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801453187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:27,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:27,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:25:27,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14711178] [2024-06-27 20:25:27,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:27,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:25:27,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:27,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:25:27,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:25:27,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:25:27,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 709 transitions, 9605 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:27,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:27,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:25:27,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:29,238 INFO L124 PetriNetUnfolderBase]: 3908/5978 cut-off events. [2024-06-27 20:25:29,238 INFO L125 PetriNetUnfolderBase]: For 2355696/2355700 co-relation queries the response was YES. [2024-06-27 20:25:29,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77301 conditions, 5978 events. 3908/5978 cut-off events. For 2355696/2355700 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 33880 event pairs, 600 based on Foata normal form. 3/5978 useless extension candidates. Maximal degree in co-relation 77076. Up to 5571 conditions per place. [2024-06-27 20:25:29,350 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 663 selfloop transitions, 74 changer transitions 0/741 dead transitions. [2024-06-27 20:25:29,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 741 transitions, 12315 flow [2024-06-27 20:25:29,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:25:29,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:25:29,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-27 20:25:29,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-27 20:25:29,352 INFO L175 Difference]: Start difference. First operand has 471 places, 709 transitions, 9605 flow. Second operand 9 states and 148 transitions. [2024-06-27 20:25:29,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 741 transitions, 12315 flow [2024-06-27 20:25:36,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 741 transitions, 11905 flow, removed 70 selfloop flow, removed 8 redundant places. [2024-06-27 20:25:36,870 INFO L231 Difference]: Finished difference. Result has 473 places, 720 transitions, 9874 flow [2024-06-27 20:25:36,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9195, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=641, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9874, PETRI_PLACES=473, PETRI_TRANSITIONS=720} [2024-06-27 20:25:36,871 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 431 predicate places. [2024-06-27 20:25:36,871 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 720 transitions, 9874 flow [2024-06-27 20:25:36,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:36,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:36,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:36,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-27 20:25:36,872 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)] === [2024-06-27 20:25:36,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:36,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1947253925, now seen corresponding path program 6 times [2024-06-27 20:25:36,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:36,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371026510] [2024-06-27 20:25:36,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:36,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:36,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:37,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:37,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:37,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371026510] [2024-06-27 20:25:37,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371026510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:37,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:37,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:25:37,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617035792] [2024-06-27 20:25:37,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:37,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:25:37,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:37,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:25:37,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:25:37,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:25:37,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 720 transitions, 9874 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:37,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:37,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:25:37,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:39,756 INFO L124 PetriNetUnfolderBase]: 3950/6028 cut-off events. [2024-06-27 20:25:39,756 INFO L125 PetriNetUnfolderBase]: For 2436627/2436631 co-relation queries the response was YES. [2024-06-27 20:25:39,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78963 conditions, 6028 events. 3950/6028 cut-off events. For 2436627/2436631 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 34120 event pairs, 610 based on Foata normal form. 3/6028 useless extension candidates. Maximal degree in co-relation 78736. Up to 5629 conditions per place. [2024-06-27 20:25:39,862 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 666 selfloop transitions, 87 changer transitions 0/757 dead transitions. [2024-06-27 20:25:39,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 757 transitions, 12671 flow [2024-06-27 20:25:39,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:25:39,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:25:39,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-27 20:25:39,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-27 20:25:39,864 INFO L175 Difference]: Start difference. First operand has 473 places, 720 transitions, 9874 flow. Second operand 9 states and 148 transitions. [2024-06-27 20:25:39,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 757 transitions, 12671 flow [2024-06-27 20:25:47,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 757 transitions, 12398 flow, removed 107 selfloop flow, removed 4 redundant places. [2024-06-27 20:25:47,821 INFO L231 Difference]: Finished difference. Result has 480 places, 734 transitions, 10348 flow [2024-06-27 20:25:47,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9601, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10348, PETRI_PLACES=480, PETRI_TRANSITIONS=734} [2024-06-27 20:25:47,821 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 438 predicate places. [2024-06-27 20:25:47,821 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 734 transitions, 10348 flow [2024-06-27 20:25:47,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:47,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:47,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:47,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-27 20:25:47,822 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)] === [2024-06-27 20:25:47,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:47,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1575004722, now seen corresponding path program 14 times [2024-06-27 20:25:47,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:47,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847014512] [2024-06-27 20:25:47,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:47,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:47,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:48,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:48,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:48,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847014512] [2024-06-27 20:25:48,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847014512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:48,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:48,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:25:48,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686401219] [2024-06-27 20:25:48,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:48,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:25:48,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:48,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:25:48,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:25:48,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:25:48,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 734 transitions, 10348 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:48,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:48,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:25:48,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:50,399 INFO L124 PetriNetUnfolderBase]: 3960/6031 cut-off events. [2024-06-27 20:25:50,400 INFO L125 PetriNetUnfolderBase]: For 2465922/2465926 co-relation queries the response was YES. [2024-06-27 20:25:50,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79441 conditions, 6031 events. 3960/6031 cut-off events. For 2465922/2465926 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 34066 event pairs, 620 based on Foata normal form. 3/6027 useless extension candidates. Maximal degree in co-relation 79210. Up to 5277 conditions per place. [2024-06-27 20:25:50,518 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 596 selfloop transitions, 156 changer transitions 0/756 dead transitions. [2024-06-27 20:25:50,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 756 transitions, 12126 flow [2024-06-27 20:25:50,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:25:50,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:25:50,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 20:25:50,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-27 20:25:50,519 INFO L175 Difference]: Start difference. First operand has 480 places, 734 transitions, 10348 flow. Second operand 9 states and 150 transitions. [2024-06-27 20:25:50,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 756 transitions, 12126 flow [2024-06-27 20:25:59,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 756 transitions, 11865 flow, removed 69 selfloop flow, removed 5 redundant places. [2024-06-27 20:25:59,188 INFO L231 Difference]: Finished difference. Result has 484 places, 737 transitions, 10577 flow [2024-06-27 20:25:59,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10087, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10577, PETRI_PLACES=484, PETRI_TRANSITIONS=737} [2024-06-27 20:25:59,189 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 442 predicate places. [2024-06-27 20:25:59,189 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 737 transitions, 10577 flow [2024-06-27 20:25:59,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:59,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:59,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:59,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-27 20:25:59,189 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)] === [2024-06-27 20:25:59,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:59,190 INFO L85 PathProgramCache]: Analyzing trace with hash -925451748, now seen corresponding path program 10 times [2024-06-27 20:25:59,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:59,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384635196] [2024-06-27 20:25:59,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:59,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:59,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:59,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:59,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:59,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384635196] [2024-06-27 20:25:59,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384635196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:59,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:59,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:25:59,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981799780] [2024-06-27 20:25:59,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:59,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:25:59,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:59,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:25:59,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:25:59,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:25:59,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 737 transitions, 10577 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:59,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:59,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:25:59,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:01,737 INFO L124 PetriNetUnfolderBase]: 3978/6085 cut-off events. [2024-06-27 20:26:01,737 INFO L125 PetriNetUnfolderBase]: For 2514936/2514942 co-relation queries the response was YES. [2024-06-27 20:26:01,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80601 conditions, 6085 events. 3978/6085 cut-off events. For 2514936/2514942 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 34704 event pairs, 693 based on Foata normal form. 3/6086 useless extension candidates. Maximal degree in co-relation 80369. Up to 5066 conditions per place. [2024-06-27 20:26:01,848 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 554 selfloop transitions, 201 changer transitions 0/759 dead transitions. [2024-06-27 20:26:01,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 759 transitions, 13007 flow [2024-06-27 20:26:01,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:26:01,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:26:01,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 20:26:01,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-27 20:26:01,850 INFO L175 Difference]: Start difference. First operand has 484 places, 737 transitions, 10577 flow. Second operand 8 states and 134 transitions. [2024-06-27 20:26:01,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 759 transitions, 13007 flow [2024-06-27 20:26:08,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 759 transitions, 12539 flow, removed 80 selfloop flow, removed 7 redundant places. [2024-06-27 20:26:08,769 INFO L231 Difference]: Finished difference. Result has 485 places, 743 transitions, 10688 flow [2024-06-27 20:26:08,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10109, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10688, PETRI_PLACES=485, PETRI_TRANSITIONS=743} [2024-06-27 20:26:08,769 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 443 predicate places. [2024-06-27 20:26:08,770 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 743 transitions, 10688 flow [2024-06-27 20:26:08,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:08,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:08,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:08,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-27 20:26:08,770 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)] === [2024-06-27 20:26:08,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:08,770 INFO L85 PathProgramCache]: Analyzing trace with hash 2053848392, now seen corresponding path program 15 times [2024-06-27 20:26:08,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:08,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279917322] [2024-06-27 20:26:08,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:08,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:08,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:09,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:09,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:09,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279917322] [2024-06-27 20:26:09,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279917322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:09,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:09,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:26:09,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629159396] [2024-06-27 20:26:09,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:09,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:26:09,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:09,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:26:09,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:26:09,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:26:09,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 743 transitions, 10688 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:09,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:09,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:26:09,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:11,538 INFO L124 PetriNetUnfolderBase]: 4004/6092 cut-off events. [2024-06-27 20:26:11,538 INFO L125 PetriNetUnfolderBase]: For 2576608/2576612 co-relation queries the response was YES. [2024-06-27 20:26:11,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81756 conditions, 6092 events. 4004/6092 cut-off events. For 2576608/2576612 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 34458 event pairs, 617 based on Foata normal form. 3/6088 useless extension candidates. Maximal degree in co-relation 81523. Up to 5287 conditions per place. [2024-06-27 20:26:11,662 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 597 selfloop transitions, 170 changer transitions 0/771 dead transitions. [2024-06-27 20:26:11,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 771 transitions, 13014 flow [2024-06-27 20:26:11,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:26:11,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:26:11,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 20:26:11,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 20:26:11,681 INFO L175 Difference]: Start difference. First operand has 485 places, 743 transitions, 10688 flow. Second operand 9 states and 153 transitions. [2024-06-27 20:26:11,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 771 transitions, 13014 flow [2024-06-27 20:26:20,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 771 transitions, 12704 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-27 20:26:20,572 INFO L231 Difference]: Finished difference. Result has 491 places, 751 transitions, 11106 flow [2024-06-27 20:26:20,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10378, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=743, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11106, PETRI_PLACES=491, PETRI_TRANSITIONS=751} [2024-06-27 20:26:20,573 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 449 predicate places. [2024-06-27 20:26:20,573 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 751 transitions, 11106 flow [2024-06-27 20:26:20,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:20,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:20,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:20,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-27 20:26:20,573 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)] === [2024-06-27 20:26:20,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:20,574 INFO L85 PathProgramCache]: Analyzing trace with hash -919464749, now seen corresponding path program 7 times [2024-06-27 20:26:20,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:20,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607608640] [2024-06-27 20:26:20,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:20,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:20,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:21,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:21,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:21,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607608640] [2024-06-27 20:26:21,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607608640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:21,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:21,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:26:21,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655001765] [2024-06-27 20:26:21,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:21,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:26:21,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:21,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:26:21,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:26:21,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:26:21,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 751 transitions, 11106 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:21,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:21,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:26:21,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:23,606 INFO L124 PetriNetUnfolderBase]: 3998/6119 cut-off events. [2024-06-27 20:26:23,606 INFO L125 PetriNetUnfolderBase]: For 2580243/2580247 co-relation queries the response was YES. [2024-06-27 20:26:23,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81868 conditions, 6119 events. 3998/6119 cut-off events. For 2580243/2580247 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 34924 event pairs, 660 based on Foata normal form. 3/6121 useless extension candidates. Maximal degree in co-relation 81633. Up to 5895 conditions per place. [2024-06-27 20:26:23,718 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 738 selfloop transitions, 25 changer transitions 0/767 dead transitions. [2024-06-27 20:26:23,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 767 transitions, 12702 flow [2024-06-27 20:26:23,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:26:23,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:26:23,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-27 20:26:23,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36314363143631434 [2024-06-27 20:26:23,720 INFO L175 Difference]: Start difference. First operand has 491 places, 751 transitions, 11106 flow. Second operand 9 states and 134 transitions. [2024-06-27 20:26:23,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 767 transitions, 12702 flow [2024-06-27 20:26:33,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 767 transitions, 12179 flow, removed 164 selfloop flow, removed 5 redundant places. [2024-06-27 20:26:33,554 INFO L231 Difference]: Finished difference. Result has 495 places, 751 transitions, 10642 flow [2024-06-27 20:26:33,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10583, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=726, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10642, PETRI_PLACES=495, PETRI_TRANSITIONS=751} [2024-06-27 20:26:33,554 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 453 predicate places. [2024-06-27 20:26:33,554 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 751 transitions, 10642 flow [2024-06-27 20:26:33,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:33,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:33,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:33,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-27 20:26:33,555 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)] === [2024-06-27 20:26:33,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:33,555 INFO L85 PathProgramCache]: Analyzing trace with hash -919673286, now seen corresponding path program 16 times [2024-06-27 20:26:33,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:33,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241840464] [2024-06-27 20:26:33,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:33,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:33,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:34,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:34,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:34,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241840464] [2024-06-27 20:26:34,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241840464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:34,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:34,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:26:34,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76323425] [2024-06-27 20:26:34,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:34,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:26:34,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:34,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:26:34,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:26:34,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:26:34,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 751 transitions, 10642 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:34,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:34,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:26:34,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:36,234 INFO L124 PetriNetUnfolderBase]: 3992/6099 cut-off events. [2024-06-27 20:26:36,235 INFO L125 PetriNetUnfolderBase]: For 2573904/2573908 co-relation queries the response was YES. [2024-06-27 20:26:36,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80933 conditions, 6099 events. 3992/6099 cut-off events. For 2573904/2573908 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 34696 event pairs, 620 based on Foata normal form. 3/6099 useless extension candidates. Maximal degree in co-relation 80696. Up to 5691 conditions per place. [2024-06-27 20:26:36,356 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 689 selfloop transitions, 77 changer transitions 0/770 dead transitions. [2024-06-27 20:26:36,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 770 transitions, 12592 flow [2024-06-27 20:26:36,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:26:36,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:26:36,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-27 20:26:36,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-27 20:26:36,358 INFO L175 Difference]: Start difference. First operand has 495 places, 751 transitions, 10642 flow. Second operand 9 states and 146 transitions. [2024-06-27 20:26:36,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 770 transitions, 12592 flow [2024-06-27 20:26:45,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 770 transitions, 12383 flow, removed 58 selfloop flow, removed 9 redundant places. [2024-06-27 20:26:45,576 INFO L231 Difference]: Finished difference. Result has 495 places, 751 transitions, 10593 flow [2024-06-27 20:26:45,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10433, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=674, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10593, PETRI_PLACES=495, PETRI_TRANSITIONS=751} [2024-06-27 20:26:45,585 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 453 predicate places. [2024-06-27 20:26:45,585 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 751 transitions, 10593 flow [2024-06-27 20:26:45,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:45,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:45,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:45,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-27 20:26:45,586 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)] === [2024-06-27 20:26:45,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:45,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1582356372, now seen corresponding path program 17 times [2024-06-27 20:26:45,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:45,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510876558] [2024-06-27 20:26:45,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:45,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:45,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:46,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:46,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:46,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510876558] [2024-06-27 20:26:46,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510876558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:46,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:46,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:26:46,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234258793] [2024-06-27 20:26:46,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:46,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:26:46,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:46,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:26:46,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:26:46,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:26:46,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 751 transitions, 10593 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:46,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:46,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:26:46,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:48,259 INFO L124 PetriNetUnfolderBase]: 3986/6068 cut-off events. [2024-06-27 20:26:48,260 INFO L125 PetriNetUnfolderBase]: For 2574342/2574346 co-relation queries the response was YES. [2024-06-27 20:26:48,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80639 conditions, 6068 events. 3986/6068 cut-off events. For 2574342/2574346 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 34366 event pairs, 623 based on Foata normal form. 3/6064 useless extension candidates. Maximal degree in co-relation 80401. Up to 5314 conditions per place. [2024-06-27 20:26:48,378 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 611 selfloop transitions, 156 changer transitions 0/771 dead transitions. [2024-06-27 20:26:48,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 771 transitions, 12272 flow [2024-06-27 20:26:48,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:26:48,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:26:48,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 20:26:48,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-27 20:26:48,379 INFO L175 Difference]: Start difference. First operand has 495 places, 751 transitions, 10593 flow. Second operand 9 states and 149 transitions. [2024-06-27 20:26:48,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 771 transitions, 12272 flow [2024-06-27 20:26:57,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 771 transitions, 11992 flow, removed 71 selfloop flow, removed 7 redundant places. [2024-06-27 20:26:57,176 INFO L231 Difference]: Finished difference. Result has 497 places, 752 transitions, 10670 flow [2024-06-27 20:26:57,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10339, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10670, PETRI_PLACES=497, PETRI_TRANSITIONS=752} [2024-06-27 20:26:57,176 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 455 predicate places. [2024-06-27 20:26:57,176 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 752 transitions, 10670 flow [2024-06-27 20:26:57,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:57,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:57,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:57,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-27 20:26:57,177 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)] === [2024-06-27 20:26:57,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:57,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1960147104, now seen corresponding path program 11 times [2024-06-27 20:26:57,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:57,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106418519] [2024-06-27 20:26:57,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:57,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:57,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:57,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:57,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:57,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106418519] [2024-06-27 20:26:57,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106418519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:57,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:57,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:26:57,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521606555] [2024-06-27 20:26:57,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:57,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:26:57,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:57,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:26:57,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:26:57,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:26:57,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 752 transitions, 10670 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:57,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:57,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:26:57,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:00,076 INFO L124 PetriNetUnfolderBase]: 3996/6109 cut-off events. [2024-06-27 20:27:00,076 INFO L125 PetriNetUnfolderBase]: For 2599393/2599399 co-relation queries the response was YES. [2024-06-27 20:27:00,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81041 conditions, 6109 events. 3996/6109 cut-off events. For 2599393/2599399 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 34823 event pairs, 694 based on Foata normal form. 3/6110 useless extension candidates. Maximal degree in co-relation 80802. Up to 5088 conditions per place. [2024-06-27 20:27:00,203 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 565 selfloop transitions, 203 changer transitions 0/772 dead transitions. [2024-06-27 20:27:00,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 772 transitions, 13398 flow [2024-06-27 20:27:00,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:27:00,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:27:00,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 20:27:00,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-27 20:27:00,204 INFO L175 Difference]: Start difference. First operand has 497 places, 752 transitions, 10670 flow. Second operand 8 states and 137 transitions. [2024-06-27 20:27:00,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 772 transitions, 13398 flow [2024-06-27 20:27:09,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 772 transitions, 13070 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 20:27:09,609 INFO L231 Difference]: Finished difference. Result has 498 places, 755 transitions, 10838 flow [2024-06-27 20:27:09,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10342, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10838, PETRI_PLACES=498, PETRI_TRANSITIONS=755} [2024-06-27 20:27:09,610 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 456 predicate places. [2024-06-27 20:27:09,610 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 755 transitions, 10838 flow [2024-06-27 20:27:09,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:09,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:09,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:09,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-27 20:27:09,611 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:09,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:09,611 INFO L85 PathProgramCache]: Analyzing trace with hash -484907015, now seen corresponding path program 8 times [2024-06-27 20:27:09,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:09,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756739811] [2024-06-27 20:27:09,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:09,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:09,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:10,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:10,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:10,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756739811] [2024-06-27 20:27:10,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756739811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:10,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:10,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:27:10,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568479644] [2024-06-27 20:27:10,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:10,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:27:10,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:10,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:27:10,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:27:10,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:27:10,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 755 transitions, 10838 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:10,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:10,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:27:10,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:12,624 INFO L124 PetriNetUnfolderBase]: 3993/6103 cut-off events. [2024-06-27 20:27:12,624 INFO L125 PetriNetUnfolderBase]: For 2600819/2600823 co-relation queries the response was YES. [2024-06-27 20:27:12,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81082 conditions, 6103 events. 3993/6103 cut-off events. For 2600819/2600823 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 34709 event pairs, 613 based on Foata normal form. 2/6102 useless extension candidates. Maximal degree in co-relation 80842. Up to 5752 conditions per place. [2024-06-27 20:27:12,746 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 718 selfloop transitions, 51 changer transitions 0/773 dead transitions. [2024-06-27 20:27:12,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 773 transitions, 12494 flow [2024-06-27 20:27:12,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:27:12,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:27:12,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-27 20:27:12,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37669376693766937 [2024-06-27 20:27:12,748 INFO L175 Difference]: Start difference. First operand has 498 places, 755 transitions, 10838 flow. Second operand 9 states and 139 transitions. [2024-06-27 20:27:12,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 773 transitions, 12494 flow [2024-06-27 20:27:22,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 773 transitions, 12035 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-27 20:27:22,655 INFO L231 Difference]: Finished difference. Result has 502 places, 757 transitions, 10559 flow [2024-06-27 20:27:22,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10379, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=755, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=704, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10559, PETRI_PLACES=502, PETRI_TRANSITIONS=757} [2024-06-27 20:27:22,656 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 460 predicate places. [2024-06-27 20:27:22,656 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 757 transitions, 10559 flow [2024-06-27 20:27:22,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:22,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:22,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:22,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-27 20:27:22,656 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:22,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:22,657 INFO L85 PathProgramCache]: Analyzing trace with hash -740513952, now seen corresponding path program 18 times [2024-06-27 20:27:22,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:22,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962089595] [2024-06-27 20:27:22,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:22,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:22,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:23,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:23,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:23,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962089595] [2024-06-27 20:27:23,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962089595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:23,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:23,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:27:23,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833691333] [2024-06-27 20:27:23,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:23,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:27:23,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:23,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:27:23,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:27:23,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:27:23,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 757 transitions, 10559 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:23,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:23,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:27:23,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:25,593 INFO L124 PetriNetUnfolderBase]: 3987/6091 cut-off events. [2024-06-27 20:27:25,594 INFO L125 PetriNetUnfolderBase]: For 2613394/2613398 co-relation queries the response was YES. [2024-06-27 20:27:25,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80210 conditions, 6091 events. 3987/6091 cut-off events. For 2613394/2613398 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 34651 event pairs, 618 based on Foata normal form. 3/6091 useless extension candidates. Maximal degree in co-relation 79969. Up to 5741 conditions per place. [2024-06-27 20:27:25,723 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 720 selfloop transitions, 51 changer transitions 0/775 dead transitions. [2024-06-27 20:27:25,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 775 transitions, 12203 flow [2024-06-27 20:27:25,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:27:25,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:27:25,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-27 20:27:25,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3794037940379404 [2024-06-27 20:27:25,724 INFO L175 Difference]: Start difference. First operand has 502 places, 757 transitions, 10559 flow. Second operand 9 states and 140 transitions. [2024-06-27 20:27:25,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 775 transitions, 12203 flow [2024-06-27 20:27:35,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 775 transitions, 11885 flow, removed 110 selfloop flow, removed 7 redundant places. [2024-06-27 20:27:35,554 INFO L231 Difference]: Finished difference. Result has 504 places, 758 transitions, 10387 flow [2024-06-27 20:27:35,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10267, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=757, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=706, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10387, PETRI_PLACES=504, PETRI_TRANSITIONS=758} [2024-06-27 20:27:35,555 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 462 predicate places. [2024-06-27 20:27:35,555 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 758 transitions, 10387 flow [2024-06-27 20:27:35,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:35,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:35,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:35,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-27 20:27:35,556 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:35,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:35,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1582362324, now seen corresponding path program 12 times [2024-06-27 20:27:35,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:35,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767225976] [2024-06-27 20:27:35,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:35,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:35,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:36,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:36,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:36,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767225976] [2024-06-27 20:27:36,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767225976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:36,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:36,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:27:36,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040694938] [2024-06-27 20:27:36,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:36,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:27:36,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:36,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:27:36,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:27:36,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:27:36,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 758 transitions, 10387 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:36,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:36,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:27:36,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:38,388 INFO L124 PetriNetUnfolderBase]: 3981/6093 cut-off events. [2024-06-27 20:27:38,389 INFO L125 PetriNetUnfolderBase]: For 2611082/2611088 co-relation queries the response was YES. [2024-06-27 20:27:38,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79659 conditions, 6093 events. 3981/6093 cut-off events. For 2611082/2611088 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 34752 event pairs, 692 based on Foata normal form. 3/6094 useless extension candidates. Maximal degree in co-relation 79417. Up to 5071 conditions per place. [2024-06-27 20:27:38,503 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 561 selfloop transitions, 209 changer transitions 0/774 dead transitions. [2024-06-27 20:27:38,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 774 transitions, 12709 flow [2024-06-27 20:27:38,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:27:38,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:27:38,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 20:27:38,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-27 20:27:38,505 INFO L175 Difference]: Start difference. First operand has 504 places, 758 transitions, 10387 flow. Second operand 8 states and 137 transitions. [2024-06-27 20:27:38,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 774 transitions, 12709 flow [2024-06-27 20:27:48,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 774 transitions, 12537 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-27 20:27:48,199 INFO L231 Difference]: Finished difference. Result has 505 places, 758 transitions, 10639 flow [2024-06-27 20:27:48,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10215, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=758, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10639, PETRI_PLACES=505, PETRI_TRANSITIONS=758} [2024-06-27 20:27:48,200 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 463 predicate places. [2024-06-27 20:27:48,200 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 758 transitions, 10639 flow [2024-06-27 20:27:48,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:48,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:48,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:48,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-27 20:27:48,201 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:48,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:48,201 INFO L85 PathProgramCache]: Analyzing trace with hash 598079794, now seen corresponding path program 19 times [2024-06-27 20:27:48,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:48,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996582388] [2024-06-27 20:27:48,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:48,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:48,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:49,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:49,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:49,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996582388] [2024-06-27 20:27:49,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996582388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:49,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:49,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:27:49,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251393420] [2024-06-27 20:27:49,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:49,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:27:49,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:49,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:27:49,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:27:49,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:27:49,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 758 transitions, 10639 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:49,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:49,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:27:49,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:51,388 INFO L124 PetriNetUnfolderBase]: 4023/6151 cut-off events. [2024-06-27 20:27:51,389 INFO L125 PetriNetUnfolderBase]: For 2713757/2713763 co-relation queries the response was YES. [2024-06-27 20:27:51,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82129 conditions, 6151 events. 4023/6151 cut-off events. For 2713757/2713763 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 35128 event pairs, 696 based on Foata normal form. 3/6152 useless extension candidates. Maximal degree in co-relation 81886. Up to 5067 conditions per place. [2024-06-27 20:27:51,506 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 561 selfloop transitions, 219 changer transitions 0/784 dead transitions. [2024-06-27 20:27:51,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 784 transitions, 13389 flow [2024-06-27 20:27:51,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:27:51,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:27:51,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 20:27:51,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-27 20:27:51,508 INFO L175 Difference]: Start difference. First operand has 505 places, 758 transitions, 10639 flow. Second operand 9 states and 150 transitions. [2024-06-27 20:27:51,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 784 transitions, 13389 flow [2024-06-27 20:28:01,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 784 transitions, 12681 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-27 20:28:01,528 INFO L231 Difference]: Finished difference. Result has 506 places, 767 transitions, 10804 flow [2024-06-27 20:28:01,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9931, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=758, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10804, PETRI_PLACES=506, PETRI_TRANSITIONS=767} [2024-06-27 20:28:01,529 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 464 predicate places. [2024-06-27 20:28:01,529 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 767 transitions, 10804 flow [2024-06-27 20:28:01,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:01,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:01,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:01,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-27 20:28:01,530 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:01,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:01,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1360888943, now seen corresponding path program 9 times [2024-06-27 20:28:01,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:01,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020322091] [2024-06-27 20:28:01,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:01,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:01,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:02,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:02,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:02,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020322091] [2024-06-27 20:28:02,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020322091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:02,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:02,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:28:02,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752234411] [2024-06-27 20:28:02,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:02,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:28:02,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:02,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:28:02,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:28:02,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:28:02,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 767 transitions, 10804 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:02,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:02,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:28:02,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:04,700 INFO L124 PetriNetUnfolderBase]: 4043/6177 cut-off events. [2024-06-27 20:28:04,700 INFO L125 PetriNetUnfolderBase]: For 2777943/2777951 co-relation queries the response was YES. [2024-06-27 20:28:04,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82798 conditions, 6177 events. 4043/6177 cut-off events. For 2777943/2777951 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 35181 event pairs, 642 based on Foata normal form. 9/6184 useless extension candidates. Maximal degree in co-relation 82554. Up to 5613 conditions per place. [2024-06-27 20:28:04,821 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 673 selfloop transitions, 110 changer transitions 0/787 dead transitions. [2024-06-27 20:28:04,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 787 transitions, 12982 flow [2024-06-27 20:28:04,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:28:04,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:28:04,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-27 20:28:04,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39295392953929537 [2024-06-27 20:28:04,823 INFO L175 Difference]: Start difference. First operand has 506 places, 767 transitions, 10804 flow. Second operand 9 states and 145 transitions. [2024-06-27 20:28:04,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 787 transitions, 12982 flow [2024-06-27 20:28:14,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 787 transitions, 12485 flow, removed 117 selfloop flow, removed 5 redundant places. [2024-06-27 20:28:14,885 INFO L231 Difference]: Finished difference. Result has 510 places, 773 transitions, 10743 flow [2024-06-27 20:28:14,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10307, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=767, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=662, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10743, PETRI_PLACES=510, PETRI_TRANSITIONS=773} [2024-06-27 20:28:14,885 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 468 predicate places. [2024-06-27 20:28:14,885 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 773 transitions, 10743 flow [2024-06-27 20:28:14,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:14,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:14,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:14,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-27 20:28:14,886 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:14,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:14,886 INFO L85 PathProgramCache]: Analyzing trace with hash 590318014, now seen corresponding path program 20 times [2024-06-27 20:28:14,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:14,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55517433] [2024-06-27 20:28:14,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:14,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:14,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:15,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:15,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:15,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55517433] [2024-06-27 20:28:15,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55517433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:15,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:15,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:28:15,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285465028] [2024-06-27 20:28:15,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:15,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:28:15,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:15,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:28:15,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:28:15,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:28:15,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 773 transitions, 10743 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:15,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:15,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:28:15,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:17,833 INFO L124 PetriNetUnfolderBase]: 4053/6189 cut-off events. [2024-06-27 20:28:17,833 INFO L125 PetriNetUnfolderBase]: For 2777506/2777514 co-relation queries the response was YES. [2024-06-27 20:28:17,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83061 conditions, 6189 events. 4053/6189 cut-off events. For 2777506/2777514 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 35249 event pairs, 649 based on Foata normal form. 7/6194 useless extension candidates. Maximal degree in co-relation 82815. Up to 5772 conditions per place. [2024-06-27 20:28:18,262 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 714 selfloop transitions, 71 changer transitions 0/789 dead transitions. [2024-06-27 20:28:18,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 789 transitions, 12547 flow [2024-06-27 20:28:18,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:28:18,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:28:18,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-27 20:28:18,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37398373983739835 [2024-06-27 20:28:18,263 INFO L175 Difference]: Start difference. First operand has 510 places, 773 transitions, 10743 flow. Second operand 9 states and 138 transitions. [2024-06-27 20:28:18,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 789 transitions, 12547 flow [2024-06-27 20:28:29,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 789 transitions, 12237 flow, removed 69 selfloop flow, removed 6 redundant places. [2024-06-27 20:28:29,074 INFO L231 Difference]: Finished difference. Result has 513 places, 776 transitions, 10771 flow [2024-06-27 20:28:29,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10433, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=773, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=702, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10771, PETRI_PLACES=513, PETRI_TRANSITIONS=776} [2024-06-27 20:28:29,074 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 471 predicate places. [2024-06-27 20:28:29,074 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 776 transitions, 10771 flow [2024-06-27 20:28:29,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:29,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:29,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:29,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-27 20:28:29,075 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:29,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:29,075 INFO L85 PathProgramCache]: Analyzing trace with hash -605797390, now seen corresponding path program 21 times [2024-06-27 20:28:29,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:29,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803180068] [2024-06-27 20:28:29,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:29,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:29,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:29,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:29,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:29,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803180068] [2024-06-27 20:28:29,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803180068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:29,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:29,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:28:29,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780546012] [2024-06-27 20:28:29,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:29,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:28:29,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:29,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:28:29,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:28:30,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:28:30,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 776 transitions, 10771 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:30,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:30,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:28:30,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:32,032 INFO L124 PetriNetUnfolderBase]: 4057/6199 cut-off events. [2024-06-27 20:28:32,032 INFO L125 PetriNetUnfolderBase]: For 2811400/2811406 co-relation queries the response was YES. [2024-06-27 20:28:32,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83032 conditions, 6199 events. 4057/6199 cut-off events. For 2811400/2811406 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 35468 event pairs, 697 based on Foata normal form. 5/6202 useless extension candidates. Maximal degree in co-relation 82785. Up to 5161 conditions per place. [2024-06-27 20:28:32,156 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 587 selfloop transitions, 205 changer transitions 0/796 dead transitions. [2024-06-27 20:28:32,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 796 transitions, 13296 flow [2024-06-27 20:28:32,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:28:32,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:28:32,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 20:28:32,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-27 20:28:32,158 INFO L175 Difference]: Start difference. First operand has 513 places, 776 transitions, 10771 flow. Second operand 9 states and 150 transitions. [2024-06-27 20:28:32,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 796 transitions, 13296 flow [2024-06-27 20:28:42,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 796 transitions, 12980 flow, removed 89 selfloop flow, removed 7 redundant places. [2024-06-27 20:28:42,534 INFO L231 Difference]: Finished difference. Result has 515 places, 779 transitions, 11019 flow [2024-06-27 20:28:42,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10455, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=776, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11019, PETRI_PLACES=515, PETRI_TRANSITIONS=779} [2024-06-27 20:28:42,535 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 473 predicate places. [2024-06-27 20:28:42,535 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 779 transitions, 11019 flow [2024-06-27 20:28:42,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:42,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:42,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:42,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-27 20:28:42,536 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:42,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:42,536 INFO L85 PathProgramCache]: Analyzing trace with hash 597664084, now seen corresponding path program 22 times [2024-06-27 20:28:42,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:42,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763539138] [2024-06-27 20:28:42,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:42,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:42,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:43,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:43,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:43,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763539138] [2024-06-27 20:28:43,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763539138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:43,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:43,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:28:43,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493718865] [2024-06-27 20:28:43,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:43,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:28:43,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:43,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:28:43,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:28:43,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:28:43,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 779 transitions, 11019 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:43,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:43,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:28:43,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:45,567 INFO L124 PetriNetUnfolderBase]: 4067/6213 cut-off events. [2024-06-27 20:28:45,567 INFO L125 PetriNetUnfolderBase]: For 2810330/2810336 co-relation queries the response was YES. [2024-06-27 20:28:45,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83697 conditions, 6213 events. 4067/6213 cut-off events. For 2810330/2810336 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 35510 event pairs, 702 based on Foata normal form. 3/6214 useless extension candidates. Maximal degree in co-relation 83449. Up to 5183 conditions per place. [2024-06-27 20:28:45,688 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 584 selfloop transitions, 210 changer transitions 0/798 dead transitions. [2024-06-27 20:28:45,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 798 transitions, 13202 flow [2024-06-27 20:28:45,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:28:45,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:28:45,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-27 20:28:45,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-27 20:28:45,690 INFO L175 Difference]: Start difference. First operand has 515 places, 779 transitions, 11019 flow. Second operand 9 states and 147 transitions. [2024-06-27 20:28:45,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 798 transitions, 13202 flow Killed by 15