./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix056_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix056_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.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/mix056_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/protection/mix056_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 20:39:33,352 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:39:33,399 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:39:33,403 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:39:33,403 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:39:33,426 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:39:33,429 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:39:33,429 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:39:33,430 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:39:33,433 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:39:33,433 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:39:33,433 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:39:33,434 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:39:33,435 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:39:33,435 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:39:33,435 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:39:33,436 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:39:33,436 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:39:33,436 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:39:33,436 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:39:33,436 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:39:33,437 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:39:33,437 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:39:33,437 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:39:33,437 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:39:33,438 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:39:33,438 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:39:33,438 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:39:33,438 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:39:33,439 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:39:33,439 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:39:33,440 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:39:33,440 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:39:33,441 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:39:33,441 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:39:33,441 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:39:33,441 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:39:33,441 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:39:33,441 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:39:33,442 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:39:33,442 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:39:33,442 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:39:33,442 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:39:33,443 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:39:33,656 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:39:33,669 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:39:33,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:39:33,672 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:39:33,672 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:39:33,673 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix056_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-27 20:39:33,818 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:39:33,818 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:39:33,819 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix056_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i [2024-06-27 20:39:34,803 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:39:34,993 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:39:34,993 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix056_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i [2024-06-27 20:39:35,005 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c498c0225/e1d341ed52dd45a3a3035bb9eee9937a/FLAG891069923 [2024-06-27 20:39:35,018 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c498c0225/e1d341ed52dd45a3a3035bb9eee9937a [2024-06-27 20:39:35,018 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:39:35,020 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:39:35,021 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:39:35,021 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:39:35,030 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:39:35,031 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:39:33" (1/2) ... [2024-06-27 20:39:35,031 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3733524d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:39:35, skipping insertion in model container [2024-06-27 20:39:35,032 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:39:33" (1/2) ... [2024-06-27 20:39:35,033 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5a2b01cb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:39:35, skipping insertion in model container [2024-06-27 20:39:35,033 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:39:35" (2/2) ... [2024-06-27 20:39:35,033 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3733524d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:39:35, skipping insertion in model container [2024-06-27 20:39:35,033 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:39:35" (2/2) ... [2024-06-27 20:39:35,034 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:39:35,105 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:39:35,106 INFO L97 edCorrectnessWitness]: Location invariant before [L818-L818] ((((((((((((((((! multithreaded || y$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-27 20:39:35,106 INFO L97 edCorrectnessWitness]: Location invariant before [L819-L819] ((((((((((((((((! multithreaded || y$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-27 20:39:35,106 INFO L97 edCorrectnessWitness]: Location invariant before [L816-L816] ((((((((((((((((! multithreaded || y$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-27 20:39:35,107 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:39:35,107 INFO L106 edCorrectnessWitness]: ghost_update [L814-L814] multithreaded = 1; [2024-06-27 20:39:35,142 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:39:35,458 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:39:35,466 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:39:35,608 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:39:35,634 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:39:35,635 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:39:35 WrapperNode [2024-06-27 20:39:35,635 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:39:35,636 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:39:35,636 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:39:35,636 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:39:35,640 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:39:35" (1/1) ... [2024-06-27 20:39:35,655 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:39:35" (1/1) ... [2024-06-27 20:39:35,685 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 143 [2024-06-27 20:39:35,685 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:39:35,686 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:39:35,686 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:39:35,686 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:39:35,700 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:39:35" (1/1) ... [2024-06-27 20:39:35,700 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:39:35" (1/1) ... [2024-06-27 20:39:35,703 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:39:35" (1/1) ... [2024-06-27 20:39:35,714 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 20:39:35,715 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:39:35" (1/1) ... [2024-06-27 20:39:35,715 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:39:35" (1/1) ... [2024-06-27 20:39:35,720 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:39:35" (1/1) ... [2024-06-27 20:39:35,722 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:39:35" (1/1) ... [2024-06-27 20:39:35,723 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:39:35" (1/1) ... [2024-06-27 20:39:35,724 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:39:35" (1/1) ... [2024-06-27 20:39:35,726 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:39:35,727 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:39:35,727 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:39:35,727 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:39:35,728 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:39:35" (1/1) ... [2024-06-27 20:39:35,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:39:35,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:39:35,748 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 20:39:35,780 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 20:39:35,833 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:39:35,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:39:35,833 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:39:35,833 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:39:35,833 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:39:35,834 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:39:35,834 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 20:39:35,834 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 20:39:35,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:39:35,834 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:39:35,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:39:35,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:39:35,835 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 20:39:35,953 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:39:35,955 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:39:36,226 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:39:36,227 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:39:36,345 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:39:36,345 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:39:36,347 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:39:36 BoogieIcfgContainer [2024-06-27 20:39:36,348 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:39:36,350 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:39:36,350 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:39:36,353 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:39:36,353 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:39:33" (1/4) ... [2024-06-27 20:39:36,353 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c4bc85a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:39:36, skipping insertion in model container [2024-06-27 20:39:36,353 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:39:35" (2/4) ... [2024-06-27 20:39:36,354 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c4bc85a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:39:36, skipping insertion in model container [2024-06-27 20:39:36,354 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:39:35" (3/4) ... [2024-06-27 20:39:36,355 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c4bc85a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:39:36, skipping insertion in model container [2024-06-27 20:39:36,355 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:39:36" (4/4) ... [2024-06-27 20:39:36,356 INFO L112 eAbstractionObserver]: Analyzing ICFG mix056_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i [2024-06-27 20:39:36,367 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:39:36,368 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 20:39:36,368 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:39:36,409 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:39:36,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-27 20:39:36,474 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-27 20:39:36,474 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:39:36,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 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. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 20:39:36,477 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-27 20:39:36,480 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-27 20:39:36,490 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:39:36,497 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;@9f3f888, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:39:36,497 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 20:39:36,502 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:39:36,502 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-27 20:39:36,502 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:39:36,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:39:36,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:39:36,503 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 20:39:36,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:39:36,507 INFO L85 PathProgramCache]: Analyzing trace with hash 363251747, now seen corresponding path program 1 times [2024-06-27 20:39:36,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:39:36,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906088473] [2024-06-27 20:39:36,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:39:36,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:39:36,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:39:37,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:39:37,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:39:37,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906088473] [2024-06-27 20:39:37,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906088473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:39:37,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:39:37,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:39:37,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909208794] [2024-06-27 20:39:37,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:39:37,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:39:37,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:39:37,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:39:37,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:39:37,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-27 20:39:37,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 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 20:39:37,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:39:37,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-27 20:39:37,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:39:37,646 INFO L124 PetriNetUnfolderBase]: 1152/1802 cut-off events. [2024-06-27 20:39:37,646 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-27 20:39:37,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3619 conditions, 1802 events. 1152/1802 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8629 event pairs, 785 based on Foata normal form. 1/1757 useless extension candidates. Maximal degree in co-relation 3607. Up to 1732 conditions per place. [2024-06-27 20:39:37,660 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 31 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-27 20:39:37,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 167 flow [2024-06-27 20:39:37,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:39:37,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:39:37,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-06-27 20:39:37,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-06-27 20:39:37,673 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 71 transitions. [2024-06-27 20:39:37,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 167 flow [2024-06-27 20:39:37,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 162 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 20:39:37,677 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-27 20:39:37,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-27 20:39:37,681 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-27 20:39:37,681 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-27 20:39:37,681 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 20:39:37,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:39:37,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:39:37,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:39:37,682 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 20:39:37,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:39:37,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1192620866, now seen corresponding path program 1 times [2024-06-27 20:39:37,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:39:37,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184319241] [2024-06-27 20:39:37,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:39:37,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:39:37,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:39:38,054 INFO 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 20:39:38,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:39:38,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184319241] [2024-06-27 20:39:38,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184319241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:39:38,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:39:38,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:39:38,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167648348] [2024-06-27 20:39:38,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:39:38,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:39:38,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:39:38,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:39:38,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:39:38,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 20:39:38,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 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 20:39:38,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:39:38,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 20:39:38,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:39:38,325 INFO L124 PetriNetUnfolderBase]: 1353/2040 cut-off events. [2024-06-27 20:39:38,325 INFO L125 PetriNetUnfolderBase]: For 396/396 co-relation queries the response was YES. [2024-06-27 20:39:38,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4696 conditions, 2040 events. 1353/2040 cut-off events. For 396/396 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9519 event pairs, 795 based on Foata normal form. 3/2041 useless extension candidates. Maximal degree in co-relation 4684. Up to 2005 conditions per place. [2024-06-27 20:39:38,336 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 39 selfloop transitions, 7 changer transitions 0/51 dead transitions. [2024-06-27 20:39:38,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 236 flow [2024-06-27 20:39:38,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:39:38,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:39:38,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2024-06-27 20:39:38,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55625 [2024-06-27 20:39:38,339 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 89 transitions. [2024-06-27 20:39:38,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 236 flow [2024-06-27 20:39:38,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 51 transitions, 232 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:39:38,343 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 134 flow [2024-06-27 20:39:38,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-27 20:39:38,343 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2024-06-27 20:39:38,344 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 134 flow [2024-06-27 20:39:38,344 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 20:39:38,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:39:38,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:39:38,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:39:38,347 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 20:39:38,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:39:38,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1683457414, now seen corresponding path program 1 times [2024-06-27 20:39:38,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:39:38,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207365637] [2024-06-27 20:39:38,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:39:38,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:39:38,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:39:38,766 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 20:39:38,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:39:38,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207365637] [2024-06-27 20:39:38,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207365637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:39:38,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:39:38,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 20:39:38,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32590535] [2024-06-27 20:39:38,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:39:38,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 20:39:38,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:39:38,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 20:39:38,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 20:39:38,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 20:39:38,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 134 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 20:39:38,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:39:38,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 20:39:38,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:39:39,013 INFO L124 PetriNetUnfolderBase]: 1361/2060 cut-off events. [2024-06-27 20:39:39,013 INFO L125 PetriNetUnfolderBase]: For 1171/1171 co-relation queries the response was YES. [2024-06-27 20:39:39,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5270 conditions, 2060 events. 1361/2060 cut-off events. For 1171/1171 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9757 event pairs, 569 based on Foata normal form. 5/2062 useless extension candidates. Maximal degree in co-relation 5256. Up to 1951 conditions per place. [2024-06-27 20:39:39,021 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 52 selfloop transitions, 16 changer transitions 0/73 dead transitions. [2024-06-27 20:39:39,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 73 transitions, 390 flow [2024-06-27 20:39:39,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:39:39,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:39:39,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-06-27 20:39:39,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.585 [2024-06-27 20:39:39,022 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 134 flow. Second operand 5 states and 117 transitions. [2024-06-27 20:39:39,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 73 transitions, 390 flow [2024-06-27 20:39:39,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 73 transitions, 376 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 20:39:39,025 INFO L231 Difference]: Finished difference. Result has 49 places, 48 transitions, 233 flow [2024-06-27 20:39:39,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=233, PETRI_PLACES=49, PETRI_TRANSITIONS=48} [2024-06-27 20:39:39,026 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2024-06-27 20:39:39,026 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 48 transitions, 233 flow [2024-06-27 20:39:39,026 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 20:39:39,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:39:39,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:39:39,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:39:39,027 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 20:39:39,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:39:39,027 INFO L85 PathProgramCache]: Analyzing trace with hash -2036545723, now seen corresponding path program 1 times [2024-06-27 20:39:39,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:39:39,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692521762] [2024-06-27 20:39:39,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:39:39,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:39:39,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:39:39,435 INFO 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 20:39:39,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:39:39,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692521762] [2024-06-27 20:39:39,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692521762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:39:39,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:39:39,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:39:39,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346703653] [2024-06-27 20:39:39,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:39:39,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:39:39,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:39:39,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:39:39,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:39:39,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 20:39:39,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 48 transitions, 233 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 20:39:39,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:39:39,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 20:39:39,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:39:39,722 INFO L124 PetriNetUnfolderBase]: 1373/2080 cut-off events. [2024-06-27 20:39:39,722 INFO L125 PetriNetUnfolderBase]: For 2771/2774 co-relation queries the response was YES. [2024-06-27 20:39:39,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6300 conditions, 2080 events. 1373/2080 cut-off events. For 2771/2774 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9878 event pairs, 405 based on Foata normal form. 12/2089 useless extension candidates. Maximal degree in co-relation 6283. Up to 1919 conditions per place. [2024-06-27 20:39:39,732 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 56 selfloop transitions, 19 changer transitions 0/80 dead transitions. [2024-06-27 20:39:39,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 80 transitions, 493 flow [2024-06-27 20:39:39,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:39:39,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:39:39,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-27 20:39:39,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-27 20:39:39,734 INFO L175 Difference]: Start difference. First operand has 49 places, 48 transitions, 233 flow. Second operand 6 states and 134 transitions. [2024-06-27 20:39:39,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 80 transitions, 493 flow [2024-06-27 20:39:39,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 80 transitions, 485 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-27 20:39:39,737 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 289 flow [2024-06-27 20:39:39,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=289, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2024-06-27 20:39:39,738 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 13 predicate places. [2024-06-27 20:39:39,738 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 289 flow [2024-06-27 20:39:39,738 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 20:39:39,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:39:39,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:39:39,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:39:39,739 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 20:39:39,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:39:39,739 INFO L85 PathProgramCache]: Analyzing trace with hash 504448289, now seen corresponding path program 1 times [2024-06-27 20:39:39,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:39:39,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393690156] [2024-06-27 20:39:39,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:39:39,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:39:39,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:39:40,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:39:40,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:39:40,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393690156] [2024-06-27 20:39:40,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393690156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:39:40,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:39:40,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:39:40,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220276801] [2024-06-27 20:39:40,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:39:40,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:39:40,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:39:40,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:39:40,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:39:40,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:39:40,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 289 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 20:39:40,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:39:40,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:39:40,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:39:40,442 INFO L124 PetriNetUnfolderBase]: 1161/1821 cut-off events. [2024-06-27 20:39:40,442 INFO L125 PetriNetUnfolderBase]: For 3486/3486 co-relation queries the response was YES. [2024-06-27 20:39:40,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5995 conditions, 1821 events. 1161/1821 cut-off events. For 3486/3486 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8878 event pairs, 463 based on Foata normal form. 2/1821 useless extension candidates. Maximal degree in co-relation 5974. Up to 1739 conditions per place. [2024-06-27 20:39:40,451 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 48 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-27 20:39:40,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 61 transitions, 429 flow [2024-06-27 20:39:40,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:39:40,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:39:40,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-27 20:39:40,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445 [2024-06-27 20:39:40,452 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 289 flow. Second operand 5 states and 89 transitions. [2024-06-27 20:39:40,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 61 transitions, 429 flow [2024-06-27 20:39:40,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 379 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 20:39:40,456 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 263 flow [2024-06-27 20:39:40,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=263, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2024-06-27 20:39:40,457 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 14 predicate places. [2024-06-27 20:39:40,457 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 263 flow [2024-06-27 20:39:40,457 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 20:39:40,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:39:40,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:39:40,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:39:40,458 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 20:39:40,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:39:40,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1543037825, now seen corresponding path program 1 times [2024-06-27 20:39:40,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:39:40,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574100171] [2024-06-27 20:39:40,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:39:40,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:39:40,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:39:40,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:39:40,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:39:40,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574100171] [2024-06-27 20:39:40,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574100171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:39:40,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:39:40,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:39:40,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479654076] [2024-06-27 20:39:40,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:39:40,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:39:40,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:39:40,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:39:40,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:39:40,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:39:40,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 263 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 20:39:40,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:39:40,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:39:40,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:39:41,273 INFO L124 PetriNetUnfolderBase]: 1151/1843 cut-off events. [2024-06-27 20:39:41,274 INFO L125 PetriNetUnfolderBase]: For 4007/4007 co-relation queries the response was YES. [2024-06-27 20:39:41,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5983 conditions, 1843 events. 1151/1843 cut-off events. For 4007/4007 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 9043 event pairs, 433 based on Foata normal form. 4/1845 useless extension candidates. Maximal degree in co-relation 5960. Up to 1707 conditions per place. [2024-06-27 20:39:41,284 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 53 selfloop transitions, 11 changer transitions 0/69 dead transitions. [2024-06-27 20:39:41,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 69 transitions, 449 flow [2024-06-27 20:39:41,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:39:41,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:39:41,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-27 20:39:41,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-27 20:39:41,285 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 263 flow. Second operand 6 states and 106 transitions. [2024-06-27 20:39:41,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 69 transitions, 449 flow [2024-06-27 20:39:41,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 69 transitions, 427 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 20:39:41,289 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 295 flow [2024-06-27 20:39:41,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=295, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2024-06-27 20:39:41,290 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2024-06-27 20:39:41,290 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 295 flow [2024-06-27 20:39:41,290 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 20:39:41,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:39:41,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:39:41,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:39:41,291 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 20:39:41,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:39:41,291 INFO L85 PathProgramCache]: Analyzing trace with hash -562934604, now seen corresponding path program 1 times [2024-06-27 20:39:41,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:39:41,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139089415] [2024-06-27 20:39:41,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:39:41,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:39:41,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:39:41,726 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 20:39:41,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:39:41,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139089415] [2024-06-27 20:39:41,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139089415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:39:41,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:39:41,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:39:41,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085068886] [2024-06-27 20:39:41,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:39:41,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:39:41,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:39:41,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:39:41,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:39:41,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:39:41,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 295 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 20:39:41,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:39:41,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:39:41,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:39:42,169 INFO L124 PetriNetUnfolderBase]: 1364/2068 cut-off events. [2024-06-27 20:39:42,169 INFO L125 PetriNetUnfolderBase]: For 6204/6210 co-relation queries the response was YES. [2024-06-27 20:39:42,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7352 conditions, 2068 events. 1364/2068 cut-off events. For 6204/6210 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9662 event pairs, 539 based on Foata normal form. 8/2073 useless extension candidates. Maximal degree in co-relation 7329. Up to 1956 conditions per place. [2024-06-27 20:39:42,182 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 53 selfloop transitions, 19 changer transitions 0/76 dead transitions. [2024-06-27 20:39:42,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 76 transitions, 535 flow [2024-06-27 20:39:42,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:39:42,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:39:42,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-27 20:39:42,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45416666666666666 [2024-06-27 20:39:42,184 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 295 flow. Second operand 6 states and 109 transitions. [2024-06-27 20:39:42,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 76 transitions, 535 flow [2024-06-27 20:39:42,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 76 transitions, 505 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 20:39:42,188 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 337 flow [2024-06-27 20:39:42,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=337, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2024-06-27 20:39:42,190 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2024-06-27 20:39:42,190 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 337 flow [2024-06-27 20:39:42,190 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 20:39:42,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:39:42,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:39:42,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:39:42,191 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 20:39:42,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:39:42,191 INFO L85 PathProgramCache]: Analyzing trace with hash -556471104, now seen corresponding path program 2 times [2024-06-27 20:39:42,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:39:42,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624478577] [2024-06-27 20:39:42,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:39:42,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:39:42,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:39:42,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:39:42,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:39:42,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624478577] [2024-06-27 20:39:42,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624478577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:39:42,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:39:42,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:39:42,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594494594] [2024-06-27 20:39:42,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:39:42,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:39:42,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:39:42,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:39:42,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:39:42,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:39:42,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 337 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 20:39:42,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:39:42,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:39:42,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:39:43,073 INFO L124 PetriNetUnfolderBase]: 1352/2041 cut-off events. [2024-06-27 20:39:43,074 INFO L125 PetriNetUnfolderBase]: For 7423/7427 co-relation queries the response was YES. [2024-06-27 20:39:43,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7491 conditions, 2041 events. 1352/2041 cut-off events. For 7423/7427 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9468 event pairs, 553 based on Foata normal form. 3/2037 useless extension candidates. Maximal degree in co-relation 7467. Up to 1940 conditions per place. [2024-06-27 20:39:43,088 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 47 selfloop transitions, 20 changer transitions 0/71 dead transitions. [2024-06-27 20:39:43,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 71 transitions, 509 flow [2024-06-27 20:39:43,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:39:43,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:39:43,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-27 20:39:43,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 20:39:43,090 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 337 flow. Second operand 6 states and 105 transitions. [2024-06-27 20:39:43,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 71 transitions, 509 flow [2024-06-27 20:39:43,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 71 transitions, 480 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 20:39:43,095 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 356 flow [2024-06-27 20:39:43,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=356, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2024-06-27 20:39:43,096 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 21 predicate places. [2024-06-27 20:39:43,096 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 356 flow [2024-06-27 20:39:43,097 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 20:39:43,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:39:43,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:39:43,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:39:43,097 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 20:39:43,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:39:43,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1356861440, now seen corresponding path program 1 times [2024-06-27 20:39:43,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:39:43,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012019197] [2024-06-27 20:39:43,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:39:43,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:39:43,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:39:43,530 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 20:39:43,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:39:43,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012019197] [2024-06-27 20:39:43,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012019197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:39:43,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:39:43,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:39:43,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213529235] [2024-06-27 20:39:43,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:39:43,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:39:43,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:39:43,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:39:43,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:39:43,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:39:43,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 356 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 20:39:43,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:39:43,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:39:43,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:39:44,081 INFO L124 PetriNetUnfolderBase]: 1526/2312 cut-off events. [2024-06-27 20:39:44,081 INFO L125 PetriNetUnfolderBase]: For 10062/10062 co-relation queries the response was YES. [2024-06-27 20:39:44,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8837 conditions, 2312 events. 1526/2312 cut-off events. For 10062/10062 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10975 event pairs, 466 based on Foata normal form. 8/2315 useless extension candidates. Maximal degree in co-relation 8812. Up to 1940 conditions per place. [2024-06-27 20:39:44,093 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 78 selfloop transitions, 39 changer transitions 0/121 dead transitions. [2024-06-27 20:39:44,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 121 transitions, 991 flow [2024-06-27 20:39:44,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:39:44,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:39:44,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 20:39:44,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-27 20:39:44,096 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 356 flow. Second operand 8 states and 152 transitions. [2024-06-27 20:39:44,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 121 transitions, 991 flow [2024-06-27 20:39:44,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 121 transitions, 865 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 20:39:44,107 INFO L231 Difference]: Finished difference. Result has 67 places, 80 transitions, 577 flow [2024-06-27 20:39:44,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=577, PETRI_PLACES=67, PETRI_TRANSITIONS=80} [2024-06-27 20:39:44,108 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 26 predicate places. [2024-06-27 20:39:44,108 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 80 transitions, 577 flow [2024-06-27 20:39:44,108 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 20:39:44,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:39:44,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:39:44,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:39:44,108 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 20:39:44,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:39:44,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1192082890, now seen corresponding path program 2 times [2024-06-27 20:39:44,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:39:44,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819881111] [2024-06-27 20:39:44,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:39:44,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:39:44,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:39:44,607 INFO 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 20:39:44,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:39:44,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819881111] [2024-06-27 20:39:44,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819881111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:39:44,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:39:44,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:39:44,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528027927] [2024-06-27 20:39:44,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:39:44,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:39:44,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:39:44,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:39:44,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:39:44,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:39:44,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 80 transitions, 577 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 20:39:44,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:39:44,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:39:44,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:39:45,222 INFO L124 PetriNetUnfolderBase]: 1598/2416 cut-off events. [2024-06-27 20:39:45,222 INFO L125 PetriNetUnfolderBase]: For 13165/13167 co-relation queries the response was YES. [2024-06-27 20:39:45,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10201 conditions, 2416 events. 1598/2416 cut-off events. For 13165/13167 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11464 event pairs, 478 based on Foata normal form. 12/2423 useless extension candidates. Maximal degree in co-relation 10172. Up to 1988 conditions per place. [2024-06-27 20:39:45,234 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 64 selfloop transitions, 48 changer transitions 0/116 dead transitions. [2024-06-27 20:39:45,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 116 transitions, 997 flow [2024-06-27 20:39:45,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:39:45,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:39:45,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 20:39:45,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 20:39:45,235 INFO L175 Difference]: Start difference. First operand has 67 places, 80 transitions, 577 flow. Second operand 7 states and 130 transitions. [2024-06-27 20:39:45,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 116 transitions, 997 flow [2024-06-27 20:39:45,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 116 transitions, 969 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-27 20:39:45,245 INFO L231 Difference]: Finished difference. Result has 72 places, 87 transitions, 730 flow [2024-06-27 20:39:45,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=730, PETRI_PLACES=72, PETRI_TRANSITIONS=87} [2024-06-27 20:39:45,246 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2024-06-27 20:39:45,246 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 87 transitions, 730 flow [2024-06-27 20:39:45,246 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 20:39:45,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:39:45,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:39:45,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:39:45,247 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 20:39:45,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:39:45,247 INFO L85 PathProgramCache]: Analyzing trace with hash -70496780, now seen corresponding path program 3 times [2024-06-27 20:39:45,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:39:45,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871197880] [2024-06-27 20:39:45,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:39:45,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:39:45,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:39:45,702 INFO 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 20:39:45,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:39:45,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871197880] [2024-06-27 20:39:45,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871197880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:39:45,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:39:45,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:39:45,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380421105] [2024-06-27 20:39:45,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:39:45,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:39:45,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:39:45,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:39:45,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:39:45,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:39:45,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 87 transitions, 730 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 20:39:45,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:39:45,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:39:45,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:39:46,338 INFO L124 PetriNetUnfolderBase]: 1634/2471 cut-off events. [2024-06-27 20:39:46,338 INFO L125 PetriNetUnfolderBase]: For 16063/16069 co-relation queries the response was YES. [2024-06-27 20:39:46,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11165 conditions, 2471 events. 1634/2471 cut-off events. For 16063/16069 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 11764 event pairs, 479 based on Foata normal form. 7/2463 useless extension candidates. Maximal degree in co-relation 11134. Up to 2004 conditions per place. [2024-06-27 20:39:46,352 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 61 selfloop transitions, 60 changer transitions 0/125 dead transitions. [2024-06-27 20:39:46,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 125 transitions, 1262 flow [2024-06-27 20:39:46,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:39:46,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:39:46,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 20:39:46,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 20:39:46,353 INFO L175 Difference]: Start difference. First operand has 72 places, 87 transitions, 730 flow. Second operand 7 states and 130 transitions. [2024-06-27 20:39:46,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 125 transitions, 1262 flow [2024-06-27 20:39:46,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 125 transitions, 1146 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-27 20:39:46,372 INFO L231 Difference]: Finished difference. Result has 75 places, 97 transitions, 878 flow [2024-06-27 20:39:46,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=878, PETRI_PLACES=75, PETRI_TRANSITIONS=97} [2024-06-27 20:39:46,372 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 34 predicate places. [2024-06-27 20:39:46,373 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 97 transitions, 878 flow [2024-06-27 20:39:46,373 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 20:39:46,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:39:46,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:39:46,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:39:46,373 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 20:39:46,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:39:46,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1187441260, now seen corresponding path program 4 times [2024-06-27 20:39:46,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:39:46,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078388569] [2024-06-27 20:39:46,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:39:46,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:39:46,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:39:46,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:39:46,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:39:46,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078388569] [2024-06-27 20:39:46,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078388569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:39:46,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:39:46,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:39:46,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137710443] [2024-06-27 20:39:46,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:39:46,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:39:46,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:39:46,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:39:46,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:39:46,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:39:46,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 97 transitions, 878 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 20:39:46,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:39:46,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:39:46,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:39:47,395 INFO L124 PetriNetUnfolderBase]: 1618/2454 cut-off events. [2024-06-27 20:39:47,395 INFO L125 PetriNetUnfolderBase]: For 16293/16299 co-relation queries the response was YES. [2024-06-27 20:39:47,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10988 conditions, 2454 events. 1618/2454 cut-off events. For 16293/16299 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 11748 event pairs, 488 based on Foata normal form. 7/2445 useless extension candidates. Maximal degree in co-relation 10956. Up to 1997 conditions per place. [2024-06-27 20:39:47,407 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 61 selfloop transitions, 58 changer transitions 0/123 dead transitions. [2024-06-27 20:39:47,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 123 transitions, 1236 flow [2024-06-27 20:39:47,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:39:47,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:39:47,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-27 20:39:47,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607142857142857 [2024-06-27 20:39:47,409 INFO L175 Difference]: Start difference. First operand has 75 places, 97 transitions, 878 flow. Second operand 7 states and 129 transitions. [2024-06-27 20:39:47,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 123 transitions, 1236 flow [2024-06-27 20:39:47,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 123 transitions, 1140 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 20:39:47,431 INFO L231 Difference]: Finished difference. Result has 79 places, 97 transitions, 908 flow [2024-06-27 20:39:47,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=782, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=908, PETRI_PLACES=79, PETRI_TRANSITIONS=97} [2024-06-27 20:39:47,432 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 38 predicate places. [2024-06-27 20:39:47,432 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 97 transitions, 908 flow [2024-06-27 20:39:47,433 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 20:39:47,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:39:47,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:39:47,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:39:47,433 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 20:39:47,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:39:47,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1095596162, now seen corresponding path program 1 times [2024-06-27 20:39:47,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:39:47,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289481105] [2024-06-27 20:39:47,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:39:47,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:39:47,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:39:48,247 INFO 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 20:39:48,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:39:48,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289481105] [2024-06-27 20:39:48,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289481105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:39:48,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:39:48,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:39:48,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007592293] [2024-06-27 20:39:48,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:39:48,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:39:48,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:39:48,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:39:48,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:39:48,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:39:48,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 97 transitions, 908 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 20:39:48,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:39:48,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:39:48,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:39:48,832 INFO L124 PetriNetUnfolderBase]: 1403/2219 cut-off events. [2024-06-27 20:39:48,833 INFO L125 PetriNetUnfolderBase]: For 15667/15669 co-relation queries the response was YES. [2024-06-27 20:39:48,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9982 conditions, 2219 events. 1403/2219 cut-off events. For 15667/15669 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10909 event pairs, 441 based on Foata normal form. 4/2221 useless extension candidates. Maximal degree in co-relation 9948. Up to 2052 conditions per place. [2024-06-27 20:39:48,844 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 102 selfloop transitions, 13 changer transitions 0/120 dead transitions. [2024-06-27 20:39:48,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 120 transitions, 1222 flow [2024-06-27 20:39:48,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:39:48,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:39:48,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 20:39:48,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-27 20:39:48,846 INFO L175 Difference]: Start difference. First operand has 79 places, 97 transitions, 908 flow. Second operand 7 states and 122 transitions. [2024-06-27 20:39:48,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 120 transitions, 1222 flow [2024-06-27 20:39:48,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 120 transitions, 1079 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 20:39:48,876 INFO L231 Difference]: Finished difference. Result has 80 places, 99 transitions, 824 flow [2024-06-27 20:39:48,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=765, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=824, PETRI_PLACES=80, PETRI_TRANSITIONS=99} [2024-06-27 20:39:48,877 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 39 predicate places. [2024-06-27 20:39:48,877 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 99 transitions, 824 flow [2024-06-27 20:39:48,877 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 20:39:48,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:39:48,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:39:48,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:39:48,878 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 20:39:48,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:39:48,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1726588222, now seen corresponding path program 1 times [2024-06-27 20:39:48,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:39:48,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641524378] [2024-06-27 20:39:48,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:39:48,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:39:48,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:39:49,266 INFO 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 20:39:49,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:39:49,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641524378] [2024-06-27 20:39:49,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641524378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:39:49,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:39:49,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:39:49,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71247182] [2024-06-27 20:39:49,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:39:49,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:39:49,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:39:49,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:39:49,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:39:49,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:39:49,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 99 transitions, 824 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 20:39:49,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:39:49,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:39:49,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:39:49,621 INFO L124 PetriNetUnfolderBase]: 1400/2224 cut-off events. [2024-06-27 20:39:49,621 INFO L125 PetriNetUnfolderBase]: For 15777/15779 co-relation queries the response was YES. [2024-06-27 20:39:49,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9878 conditions, 2224 events. 1400/2224 cut-off events. For 15777/15779 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 11034 event pairs, 472 based on Foata normal form. 1/2223 useless extension candidates. Maximal degree in co-relation 9843. Up to 2090 conditions per place. [2024-06-27 20:39:49,634 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 97 selfloop transitions, 8 changer transitions 0/110 dead transitions. [2024-06-27 20:39:49,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 110 transitions, 1080 flow [2024-06-27 20:39:49,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:39:49,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:39:49,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-06-27 20:39:49,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 20:39:49,636 INFO L175 Difference]: Start difference. First operand has 80 places, 99 transitions, 824 flow. Second operand 5 states and 85 transitions. [2024-06-27 20:39:49,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 110 transitions, 1080 flow [2024-06-27 20:39:49,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 110 transitions, 1039 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 20:39:49,650 INFO L231 Difference]: Finished difference. Result has 80 places, 102 transitions, 833 flow [2024-06-27 20:39:49,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=783, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=833, PETRI_PLACES=80, PETRI_TRANSITIONS=102} [2024-06-27 20:39:49,651 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 39 predicate places. [2024-06-27 20:39:49,651 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 102 transitions, 833 flow [2024-06-27 20:39:49,652 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 20:39:49,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:39:49,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:39:49,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:39:49,652 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 20:39:49,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:39:49,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1700136998, now seen corresponding path program 1 times [2024-06-27 20:39:49,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:39:49,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493363932] [2024-06-27 20:39:49,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:39:49,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:39:49,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:39:50,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:39:50,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:39:50,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493363932] [2024-06-27 20:39:50,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493363932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:39:50,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:39:50,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:39:50,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543642111] [2024-06-27 20:39:50,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:39:50,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:39:50,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:39:50,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:39:50,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:39:50,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:39:50,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 102 transitions, 833 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 20:39:50,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:39:50,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:39:50,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:39:50,618 INFO L124 PetriNetUnfolderBase]: 1700/2601 cut-off events. [2024-06-27 20:39:50,618 INFO L125 PetriNetUnfolderBase]: For 22803/22805 co-relation queries the response was YES. [2024-06-27 20:39:50,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12155 conditions, 2601 events. 1700/2601 cut-off events. For 22803/22805 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12692 event pairs, 480 based on Foata normal form. 8/2604 useless extension candidates. Maximal degree in co-relation 12119. Up to 2060 conditions per place. [2024-06-27 20:39:50,633 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 76 selfloop transitions, 65 changer transitions 0/145 dead transitions. [2024-06-27 20:39:50,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 145 transitions, 1459 flow [2024-06-27 20:39:50,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:39:50,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:39:50,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-27 20:39:50,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-06-27 20:39:50,634 INFO L175 Difference]: Start difference. First operand has 80 places, 102 transitions, 833 flow. Second operand 7 states and 132 transitions. [2024-06-27 20:39:50,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 145 transitions, 1459 flow [2024-06-27 20:39:50,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 145 transitions, 1431 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 20:39:50,655 INFO L231 Difference]: Finished difference. Result has 84 places, 114 transitions, 1100 flow [2024-06-27 20:39:50,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1100, PETRI_PLACES=84, PETRI_TRANSITIONS=114} [2024-06-27 20:39:50,656 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 43 predicate places. [2024-06-27 20:39:50,656 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 114 transitions, 1100 flow [2024-06-27 20:39:50,656 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 20:39:50,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:39:50,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:39:50,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:39:50,657 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 20:39:50,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:39:50,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1700131418, now seen corresponding path program 2 times [2024-06-27 20:39:50,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:39:50,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644543066] [2024-06-27 20:39:50,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:39:50,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:39:50,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:39:51,143 INFO 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 20:39:51,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:39:51,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644543066] [2024-06-27 20:39:51,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644543066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:39:51,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:39:51,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:39:51,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308079178] [2024-06-27 20:39:51,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:39:51,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:39:51,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:39:51,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:39:51,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:39:51,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:39:51,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 114 transitions, 1100 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 20:39:51,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:39:51,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:39:51,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:39:51,687 INFO L124 PetriNetUnfolderBase]: 1680/2581 cut-off events. [2024-06-27 20:39:51,688 INFO L125 PetriNetUnfolderBase]: For 25851/25857 co-relation queries the response was YES. [2024-06-27 20:39:51,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12509 conditions, 2581 events. 1680/2581 cut-off events. For 25851/25857 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12604 event pairs, 490 based on Foata normal form. 14/2590 useless extension candidates. Maximal degree in co-relation 12472. Up to 2044 conditions per place. [2024-06-27 20:39:51,702 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 73 selfloop transitions, 69 changer transitions 0/146 dead transitions. [2024-06-27 20:39:51,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 146 transitions, 1538 flow [2024-06-27 20:39:51,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:39:51,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:39:51,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-27 20:39:51,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2024-06-27 20:39:51,705 INFO L175 Difference]: Start difference. First operand has 84 places, 114 transitions, 1100 flow. Second operand 7 states and 134 transitions. [2024-06-27 20:39:51,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 146 transitions, 1538 flow [2024-06-27 20:39:51,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 146 transitions, 1418 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-27 20:39:51,735 INFO L231 Difference]: Finished difference. Result has 88 places, 114 transitions, 1129 flow [2024-06-27 20:39:51,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=980, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1129, PETRI_PLACES=88, PETRI_TRANSITIONS=114} [2024-06-27 20:39:51,736 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 47 predicate places. [2024-06-27 20:39:51,736 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 114 transitions, 1129 flow [2024-06-27 20:39:51,736 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 20:39:51,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:39:51,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:39:51,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:39:51,737 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 20:39:51,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:39:51,737 INFO L85 PathProgramCache]: Analyzing trace with hash 2109568040, now seen corresponding path program 3 times [2024-06-27 20:39:51,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:39:51,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660051753] [2024-06-27 20:39:51,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:39:51,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:39:51,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:39:52,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:39:52,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:39:52,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660051753] [2024-06-27 20:39:52,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660051753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:39:52,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:39:52,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:39:52,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814719451] [2024-06-27 20:39:52,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:39:52,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:39:52,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:39:52,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:39:52,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:39:52,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:39:52,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 114 transitions, 1129 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 20:39:52,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:39:52,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:39:52,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:39:52,735 INFO L124 PetriNetUnfolderBase]: 1664/2551 cut-off events. [2024-06-27 20:39:52,735 INFO L125 PetriNetUnfolderBase]: For 28200/28209 co-relation queries the response was YES. [2024-06-27 20:39:52,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12505 conditions, 2551 events. 1664/2551 cut-off events. For 28200/28209 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12440 event pairs, 494 based on Foata normal form. 9/2548 useless extension candidates. Maximal degree in co-relation 12467. Up to 2031 conditions per place. [2024-06-27 20:39:52,747 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 71 selfloop transitions, 62 changer transitions 0/137 dead transitions. [2024-06-27 20:39:52,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 137 transitions, 1469 flow [2024-06-27 20:39:52,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:39:52,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:39:52,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 20:39:52,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392857142857143 [2024-06-27 20:39:52,749 INFO L175 Difference]: Start difference. First operand has 88 places, 114 transitions, 1129 flow. Second operand 7 states and 123 transitions. [2024-06-27 20:39:52,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 137 transitions, 1469 flow [2024-06-27 20:39:52,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 137 transitions, 1236 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 20:39:52,775 INFO L231 Difference]: Finished difference. Result has 88 places, 114 transitions, 1031 flow [2024-06-27 20:39:52,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=896, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1031, PETRI_PLACES=88, PETRI_TRANSITIONS=114} [2024-06-27 20:39:52,775 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 47 predicate places. [2024-06-27 20:39:52,776 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 114 transitions, 1031 flow [2024-06-27 20:39:52,776 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 20:39:52,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:39:52,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:39:52,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:39:52,776 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:39:52,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:39:52,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1006786601, now seen corresponding path program 1 times [2024-06-27 20:39:52,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:39:52,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025555060] [2024-06-27 20:39:52,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:39:52,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:39:52,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:39:53,260 INFO 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 20:39:53,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:39:53,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025555060] [2024-06-27 20:39:53,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025555060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:39:53,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:39:53,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:39:53,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050860367] [2024-06-27 20:39:53,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:39:53,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:39:53,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:39:53,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:39:53,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:39:53,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:39:53,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 114 transitions, 1031 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 20:39:53,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:39:53,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:39:53,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:39:53,713 INFO L124 PetriNetUnfolderBase]: 1681/2573 cut-off events. [2024-06-27 20:39:53,713 INFO L125 PetriNetUnfolderBase]: For 29050/29055 co-relation queries the response was YES. [2024-06-27 20:39:53,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12633 conditions, 2573 events. 1681/2573 cut-off events. For 29050/29055 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12577 event pairs, 380 based on Foata normal form. 6/2576 useless extension candidates. Maximal degree in co-relation 12595. Up to 2252 conditions per place. [2024-06-27 20:39:53,725 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 108 selfloop transitions, 32 changer transitions 0/144 dead transitions. [2024-06-27 20:39:53,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 144 transitions, 1495 flow [2024-06-27 20:39:53,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:39:53,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:39:53,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 20:39:53,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-27 20:39:53,728 INFO L175 Difference]: Start difference. First operand has 88 places, 114 transitions, 1031 flow. Second operand 7 states and 124 transitions. [2024-06-27 20:39:53,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 144 transitions, 1495 flow [2024-06-27 20:39:53,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 144 transitions, 1312 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 20:39:53,758 INFO L231 Difference]: Finished difference. Result has 88 places, 118 transitions, 967 flow [2024-06-27 20:39:53,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=848, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=967, PETRI_PLACES=88, PETRI_TRANSITIONS=118} [2024-06-27 20:39:53,758 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 47 predicate places. [2024-06-27 20:39:53,759 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 118 transitions, 967 flow [2024-06-27 20:39:53,759 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 20:39:53,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:39:53,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:39:53,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:39:53,759 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 20:39:53,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:39:53,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1046374907, now seen corresponding path program 2 times [2024-06-27 20:39:53,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:39:53,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035125352] [2024-06-27 20:39:53,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:39:53,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:39:53,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:39:54,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:39:54,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:39:54,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035125352] [2024-06-27 20:39:54,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035125352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:39:54,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:39:54,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:39:54,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499711308] [2024-06-27 20:39:54,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:39:54,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:39:54,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:39:54,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:39:54,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:39:54,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:39:54,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 118 transitions, 967 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 20:39:54,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:39:54,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:39:54,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:39:54,770 INFO L124 PetriNetUnfolderBase]: 1673/2560 cut-off events. [2024-06-27 20:39:54,771 INFO L125 PetriNetUnfolderBase]: For 30398/30403 co-relation queries the response was YES. [2024-06-27 20:39:54,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12516 conditions, 2560 events. 1673/2560 cut-off events. For 30398/30403 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12458 event pairs, 500 based on Foata normal form. 6/2563 useless extension candidates. Maximal degree in co-relation 12477. Up to 2328 conditions per place. [2024-06-27 20:39:54,784 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 105 selfloop transitions, 33 changer transitions 0/142 dead transitions. [2024-06-27 20:39:54,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 142 transitions, 1321 flow [2024-06-27 20:39:54,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:39:54,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:39:54,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 20:39:54,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-27 20:39:54,785 INFO L175 Difference]: Start difference. First operand has 88 places, 118 transitions, 967 flow. Second operand 7 states and 122 transitions. [2024-06-27 20:39:54,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 142 transitions, 1321 flow [2024-06-27 20:39:54,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 142 transitions, 1261 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-27 20:39:54,815 INFO L231 Difference]: Finished difference. Result has 92 places, 118 transitions, 982 flow [2024-06-27 20:39:54,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=907, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=982, PETRI_PLACES=92, PETRI_TRANSITIONS=118} [2024-06-27 20:39:54,815 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 51 predicate places. [2024-06-27 20:39:54,815 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 118 transitions, 982 flow [2024-06-27 20:39:54,816 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 20:39:54,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:39:54,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:39:54,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:39:54,816 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 20:39:54,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:39:54,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1164647285, now seen corresponding path program 1 times [2024-06-27 20:39:54,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:39:54,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992923971] [2024-06-27 20:39:54,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:39:54,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:39:54,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:39:55,534 INFO 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 20:39:55,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:39:55,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992923971] [2024-06-27 20:39:55,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992923971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:39:55,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:39:55,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:39:55,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36973321] [2024-06-27 20:39:55,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:39:55,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:39:55,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:39:55,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:39:55,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:39:55,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:39:55,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 118 transitions, 982 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 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 20:39:55,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:39:55,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:39:55,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:39:56,222 INFO L124 PetriNetUnfolderBase]: 1765/2709 cut-off events. [2024-06-27 20:39:56,223 INFO L125 PetriNetUnfolderBase]: For 37585/37587 co-relation queries the response was YES. [2024-06-27 20:39:56,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13386 conditions, 2709 events. 1765/2709 cut-off events. For 37585/37587 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 13423 event pairs, 447 based on Foata normal form. 24/2728 useless extension candidates. Maximal degree in co-relation 13345. Up to 2028 conditions per place. [2024-06-27 20:39:56,235 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 81 selfloop transitions, 70 changer transitions 0/155 dead transitions. [2024-06-27 20:39:56,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 155 transitions, 1422 flow [2024-06-27 20:39:56,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:39:56,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:39:56,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 20:39:56,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.459375 [2024-06-27 20:39:56,237 INFO L175 Difference]: Start difference. First operand has 92 places, 118 transitions, 982 flow. Second operand 8 states and 147 transitions. [2024-06-27 20:39:56,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 155 transitions, 1422 flow [2024-06-27 20:39:56,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 155 transitions, 1347 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 20:39:56,266 INFO L231 Difference]: Finished difference. Result has 94 places, 120 transitions, 1089 flow [2024-06-27 20:39:56,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=907, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1089, PETRI_PLACES=94, PETRI_TRANSITIONS=120} [2024-06-27 20:39:56,266 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 53 predicate places. [2024-06-27 20:39:56,267 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 120 transitions, 1089 flow [2024-06-27 20:39:56,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 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 20:39:56,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:39:56,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:39:56,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:39:56,268 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:39:56,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:39:56,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1382507741, now seen corresponding path program 1 times [2024-06-27 20:39:56,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:39:56,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152627168] [2024-06-27 20:39:56,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:39:56,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:39:56,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:39:56,683 INFO 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 20:39:56,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:39:56,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152627168] [2024-06-27 20:39:56,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152627168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:39:56,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:39:56,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:39:56,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970523939] [2024-06-27 20:39:56,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:39:56,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:39:56,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:39:56,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:39:56,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:39:56,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:39:56,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 120 transitions, 1089 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 20:39:56,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:39:56,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:39:56,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:39:57,131 INFO L124 PetriNetUnfolderBase]: 1770/2728 cut-off events. [2024-06-27 20:39:57,132 INFO L125 PetriNetUnfolderBase]: For 37872/37878 co-relation queries the response was YES. [2024-06-27 20:39:57,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13997 conditions, 2728 events. 1770/2728 cut-off events. For 37872/37878 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 13526 event pairs, 529 based on Foata normal form. 7/2733 useless extension candidates. Maximal degree in co-relation 13955. Up to 2623 conditions per place. [2024-06-27 20:39:57,148 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 122 selfloop transitions, 13 changer transitions 0/139 dead transitions. [2024-06-27 20:39:57,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 139 transitions, 1437 flow [2024-06-27 20:39:57,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:39:57,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:39:57,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-27 20:39:57,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-27 20:39:57,150 INFO L175 Difference]: Start difference. First operand has 94 places, 120 transitions, 1089 flow. Second operand 6 states and 99 transitions. [2024-06-27 20:39:57,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 139 transitions, 1437 flow [2024-06-27 20:39:57,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 139 transitions, 1289 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 20:39:57,186 INFO L231 Difference]: Finished difference. Result has 94 places, 123 transitions, 1004 flow [2024-06-27 20:39:57,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=941, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1004, PETRI_PLACES=94, PETRI_TRANSITIONS=123} [2024-06-27 20:39:57,187 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 53 predicate places. [2024-06-27 20:39:57,187 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 123 transitions, 1004 flow [2024-06-27 20:39:57,187 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 20:39:57,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:39:57,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:39:57,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 20:39:57,187 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:39:57,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:39:57,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1876854729, now seen corresponding path program 2 times [2024-06-27 20:39:57,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:39:57,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396484359] [2024-06-27 20:39:57,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:39:57,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:39:57,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:39:57,958 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 20:39:57,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:39:57,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396484359] [2024-06-27 20:39:57,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396484359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:39:57,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:39:57,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:39:57,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109278680] [2024-06-27 20:39:57,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:39:57,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:39:57,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:39:57,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:39:57,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:39:58,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:39:58,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 123 transitions, 1004 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 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 20:39:58,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:39:58,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:39:58,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:39:58,572 INFO L124 PetriNetUnfolderBase]: 1787/2731 cut-off events. [2024-06-27 20:39:58,573 INFO L125 PetriNetUnfolderBase]: For 40567/40573 co-relation queries the response was YES. [2024-06-27 20:39:58,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14063 conditions, 2731 events. 1787/2731 cut-off events. For 40567/40573 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13393 event pairs, 469 based on Foata normal form. 5/2714 useless extension candidates. Maximal degree in co-relation 14020. Up to 2211 conditions per place. [2024-06-27 20:39:58,596 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 78 selfloop transitions, 72 changer transitions 0/154 dead transitions. [2024-06-27 20:39:58,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 154 transitions, 1426 flow [2024-06-27 20:39:58,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:39:58,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:39:58,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 20:39:58,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-06-27 20:39:58,598 INFO L175 Difference]: Start difference. First operand has 94 places, 123 transitions, 1004 flow. Second operand 8 states and 142 transitions. [2024-06-27 20:39:58,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 154 transitions, 1426 flow [2024-06-27 20:39:58,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 154 transitions, 1387 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 20:39:58,654 INFO L231 Difference]: Finished difference. Result has 98 places, 125 transitions, 1153 flow [2024-06-27 20:39:58,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=965, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1153, PETRI_PLACES=98, PETRI_TRANSITIONS=125} [2024-06-27 20:39:58,655 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 57 predicate places. [2024-06-27 20:39:58,655 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 125 transitions, 1153 flow [2024-06-27 20:39:58,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 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 20:39:58,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:39:58,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:39:58,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 20:39:58,656 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 20:39:58,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:39:58,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1640679369, now seen corresponding path program 3 times [2024-06-27 20:39:58,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:39:58,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827942273] [2024-06-27 20:39:58,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:39:58,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:39:58,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:39:59,381 INFO 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 20:39:59,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:39:59,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827942273] [2024-06-27 20:39:59,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827942273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:39:59,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:39:59,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:39:59,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873986506] [2024-06-27 20:39:59,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:39:59,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:39:59,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:39:59,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:39:59,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:39:59,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:39:59,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 125 transitions, 1153 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 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 20:39:59,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:39:59,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:39:59,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:00,090 INFO L124 PetriNetUnfolderBase]: 1804/2754 cut-off events. [2024-06-27 20:40:00,091 INFO L125 PetriNetUnfolderBase]: For 45942/45948 co-relation queries the response was YES. [2024-06-27 20:40:00,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14918 conditions, 2754 events. 1804/2754 cut-off events. For 45942/45948 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13551 event pairs, 462 based on Foata normal form. 5/2737 useless extension candidates. Maximal degree in co-relation 14874. Up to 2238 conditions per place. [2024-06-27 20:40:00,104 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 78 selfloop transitions, 74 changer transitions 0/156 dead transitions. [2024-06-27 20:40:00,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 156 transitions, 1585 flow [2024-06-27 20:40:00,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:40:00,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:40:00,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 20:40:00,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-27 20:40:00,107 INFO L175 Difference]: Start difference. First operand has 98 places, 125 transitions, 1153 flow. Second operand 8 states and 141 transitions. [2024-06-27 20:40:00,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 156 transitions, 1585 flow [2024-06-27 20:40:00,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 156 transitions, 1417 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 20:40:00,146 INFO L231 Difference]: Finished difference. Result has 100 places, 127 transitions, 1181 flow [2024-06-27 20:40:00,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=985, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1181, PETRI_PLACES=100, PETRI_TRANSITIONS=127} [2024-06-27 20:40:00,146 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 59 predicate places. [2024-06-27 20:40:00,146 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 127 transitions, 1181 flow [2024-06-27 20:40:00,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 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 20:40:00,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:00,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:40:00,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 20:40:00,148 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 20:40:00,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:00,148 INFO L85 PathProgramCache]: Analyzing trace with hash -600896547, now seen corresponding path program 4 times [2024-06-27 20:40:00,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:00,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459532523] [2024-06-27 20:40:00,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:00,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:00,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:00,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:40:00,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:00,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459532523] [2024-06-27 20:40:00,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459532523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:00,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:00,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:40:00,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312903381] [2024-06-27 20:40:00,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:00,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:40:00,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:00,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:40:00,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:40:00,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:40:00,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 127 transitions, 1181 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 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 20:40:00,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:00,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:40:00,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:01,453 INFO L124 PetriNetUnfolderBase]: 1796/2742 cut-off events. [2024-06-27 20:40:01,454 INFO L125 PetriNetUnfolderBase]: For 49039/49045 co-relation queries the response was YES. [2024-06-27 20:40:01,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15035 conditions, 2742 events. 1796/2742 cut-off events. For 49039/49045 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13478 event pairs, 418 based on Foata normal form. 5/2725 useless extension candidates. Maximal degree in co-relation 14990. Up to 1994 conditions per place. [2024-06-27 20:40:01,470 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 77 selfloop transitions, 81 changer transitions 0/162 dead transitions. [2024-06-27 20:40:01,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 162 transitions, 1643 flow [2024-06-27 20:40:01,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:40:01,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:40:01,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 20:40:01,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-27 20:40:01,471 INFO L175 Difference]: Start difference. First operand has 100 places, 127 transitions, 1181 flow. Second operand 8 states and 145 transitions. [2024-06-27 20:40:01,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 162 transitions, 1643 flow [2024-06-27 20:40:01,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 162 transitions, 1467 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 20:40:01,532 INFO L231 Difference]: Finished difference. Result has 102 places, 129 transitions, 1218 flow [2024-06-27 20:40:01,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1005, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1218, PETRI_PLACES=102, PETRI_TRANSITIONS=129} [2024-06-27 20:40:01,533 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 61 predicate places. [2024-06-27 20:40:01,533 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 129 transitions, 1218 flow [2024-06-27 20:40:01,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 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 20:40:01,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:01,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:40:01,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 20:40:01,533 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:40:01,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:01,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1393935581, now seen corresponding path program 2 times [2024-06-27 20:40:01,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:01,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622860747] [2024-06-27 20:40:01,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:01,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:01,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:02,017 INFO 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 20:40:02,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:02,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622860747] [2024-06-27 20:40:02,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622860747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:02,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:02,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:40:02,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738238365] [2024-06-27 20:40:02,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:02,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:40:02,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:02,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:40:02,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:40:02,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:40:02,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 129 transitions, 1218 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 20:40:02,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:02,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:40:02,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:02,345 INFO L124 PetriNetUnfolderBase]: 1793/2771 cut-off events. [2024-06-27 20:40:02,346 INFO L125 PetriNetUnfolderBase]: For 52152/52166 co-relation queries the response was YES. [2024-06-27 20:40:02,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15299 conditions, 2771 events. 1793/2771 cut-off events. For 52152/52166 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13785 event pairs, 527 based on Foata normal form. 13/2780 useless extension candidates. Maximal degree in co-relation 15253. Up to 2655 conditions per place. [2024-06-27 20:40:02,362 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 124 selfloop transitions, 18 changer transitions 0/146 dead transitions. [2024-06-27 20:40:02,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 146 transitions, 1588 flow [2024-06-27 20:40:02,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:40:02,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:40:02,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-27 20:40:02,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-27 20:40:02,363 INFO L175 Difference]: Start difference. First operand has 102 places, 129 transitions, 1218 flow. Second operand 6 states and 95 transitions. [2024-06-27 20:40:02,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 146 transitions, 1588 flow [2024-06-27 20:40:02,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 146 transitions, 1393 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 20:40:02,408 INFO L231 Difference]: Finished difference. Result has 103 places, 135 transitions, 1132 flow [2024-06-27 20:40:02,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1023, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1132, PETRI_PLACES=103, PETRI_TRANSITIONS=135} [2024-06-27 20:40:02,409 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 62 predicate places. [2024-06-27 20:40:02,409 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 135 transitions, 1132 flow [2024-06-27 20:40:02,409 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 20:40:02,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:02,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:40:02,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 20:40:02,409 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 20:40:02,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:02,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1709891063, now seen corresponding path program 1 times [2024-06-27 20:40:02,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:02,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607992211] [2024-06-27 20:40:02,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:02,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:02,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:02,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:40:02,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:02,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607992211] [2024-06-27 20:40:02,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607992211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:02,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:02,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:40:02,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758775634] [2024-06-27 20:40:02,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:02,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:40:02,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:02,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:40:02,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:40:02,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:40:02,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 135 transitions, 1132 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 20:40:02,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:02,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:40:02,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:03,249 INFO L124 PetriNetUnfolderBase]: 1689/2663 cut-off events. [2024-06-27 20:40:03,249 INFO L125 PetriNetUnfolderBase]: For 56396/56398 co-relation queries the response was YES. [2024-06-27 20:40:03,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14749 conditions, 2663 events. 1689/2663 cut-off events. For 56396/56398 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 13620 event pairs, 513 based on Foata normal form. 2/2663 useless extension candidates. Maximal degree in co-relation 14701. Up to 2482 conditions per place. [2024-06-27 20:40:03,265 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 131 selfloop transitions, 11 changer transitions 0/150 dead transitions. [2024-06-27 20:40:03,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 150 transitions, 1476 flow [2024-06-27 20:40:03,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:40:03,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:40:03,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-27 20:40:03,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42083333333333334 [2024-06-27 20:40:03,267 INFO L175 Difference]: Start difference. First operand has 103 places, 135 transitions, 1132 flow. Second operand 6 states and 101 transitions. [2024-06-27 20:40:03,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 150 transitions, 1476 flow [2024-06-27 20:40:03,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 150 transitions, 1436 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-27 20:40:03,322 INFO L231 Difference]: Finished difference. Result has 107 places, 138 transitions, 1150 flow [2024-06-27 20:40:03,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1092, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1150, PETRI_PLACES=107, PETRI_TRANSITIONS=138} [2024-06-27 20:40:03,322 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 66 predicate places. [2024-06-27 20:40:03,322 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 138 transitions, 1150 flow [2024-06-27 20:40:03,323 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 20:40:03,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:03,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:40:03,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 20:40:03,323 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 20:40:03,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:03,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1393941533, now seen corresponding path program 2 times [2024-06-27 20:40:03,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:03,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575960683] [2024-06-27 20:40:03,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:03,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:03,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:03,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:40:03,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:03,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575960683] [2024-06-27 20:40:03,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575960683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:03,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:03,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:40:03,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655319936] [2024-06-27 20:40:03,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:03,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:40:03,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:03,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:40:03,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:40:03,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:40:03,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 138 transitions, 1150 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 20:40:03,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:03,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:40:03,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:04,083 INFO L124 PetriNetUnfolderBase]: 1683/2656 cut-off events. [2024-06-27 20:40:04,084 INFO L125 PetriNetUnfolderBase]: For 59345/59350 co-relation queries the response was YES. [2024-06-27 20:40:04,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15059 conditions, 2656 events. 1683/2656 cut-off events. For 59345/59350 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13566 event pairs, 517 based on Foata normal form. 4/2657 useless extension candidates. Maximal degree in co-relation 15009. Up to 2466 conditions per place. [2024-06-27 20:40:04,101 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 124 selfloop transitions, 18 changer transitions 0/150 dead transitions. [2024-06-27 20:40:04,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 150 transitions, 1490 flow [2024-06-27 20:40:04,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:40:04,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:40:04,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-27 20:40:04,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 20:40:04,103 INFO L175 Difference]: Start difference. First operand has 107 places, 138 transitions, 1150 flow. Second operand 6 states and 100 transitions. [2024-06-27 20:40:04,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 150 transitions, 1490 flow [2024-06-27 20:40:04,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 150 transitions, 1454 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 20:40:04,171 INFO L231 Difference]: Finished difference. Result has 109 places, 141 transitions, 1193 flow [2024-06-27 20:40:04,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1114, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1193, PETRI_PLACES=109, PETRI_TRANSITIONS=141} [2024-06-27 20:40:04,171 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 68 predicate places. [2024-06-27 20:40:04,171 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 141 transitions, 1193 flow [2024-06-27 20:40:04,172 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 20:40:04,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:04,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:40:04,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 20:40:04,172 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 20:40:04,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:04,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1393949469, now seen corresponding path program 1 times [2024-06-27 20:40:04,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:04,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823382365] [2024-06-27 20:40:04,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:04,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:04,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:04,824 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 20:40:04,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:04,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823382365] [2024-06-27 20:40:04,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823382365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:04,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:04,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:40:04,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119593204] [2024-06-27 20:40:04,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:04,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:40:04,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:04,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:40:04,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:40:04,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:40:04,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 141 transitions, 1193 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 20:40:04,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:04,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:40:04,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:05,226 INFO L124 PetriNetUnfolderBase]: 1794/2765 cut-off events. [2024-06-27 20:40:05,226 INFO L125 PetriNetUnfolderBase]: For 62218/62220 co-relation queries the response was YES. [2024-06-27 20:40:05,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15861 conditions, 2765 events. 1794/2765 cut-off events. For 62218/62220 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13765 event pairs, 558 based on Foata normal form. 1/2764 useless extension candidates. Maximal degree in co-relation 15810. Up to 2679 conditions per place. [2024-06-27 20:40:05,244 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 136 selfloop transitions, 14 changer transitions 0/154 dead transitions. [2024-06-27 20:40:05,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 154 transitions, 1555 flow [2024-06-27 20:40:05,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:40:05,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:40:05,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2024-06-27 20:40:05,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 20:40:05,245 INFO L175 Difference]: Start difference. First operand has 109 places, 141 transitions, 1193 flow. Second operand 7 states and 105 transitions. [2024-06-27 20:40:05,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 154 transitions, 1555 flow [2024-06-27 20:40:05,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 154 transitions, 1500 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 20:40:05,326 INFO L231 Difference]: Finished difference. Result has 112 places, 144 transitions, 1212 flow [2024-06-27 20:40:05,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1138, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1212, PETRI_PLACES=112, PETRI_TRANSITIONS=144} [2024-06-27 20:40:05,326 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 71 predicate places. [2024-06-27 20:40:05,326 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 144 transitions, 1212 flow [2024-06-27 20:40:05,326 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 20:40:05,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:05,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:40:05,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 20:40:05,327 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 20:40:05,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:05,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1923989091, now seen corresponding path program 1 times [2024-06-27 20:40:05,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:05,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977127467] [2024-06-27 20:40:05,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:05,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:05,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:05,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:40:05,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:05,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977127467] [2024-06-27 20:40:05,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977127467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:05,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:05,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:40:05,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377097896] [2024-06-27 20:40:05,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:05,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:40:05,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:05,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:40:05,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:40:05,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:40:05,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 144 transitions, 1212 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 20:40:05,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:05,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:40:05,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:06,352 INFO L124 PetriNetUnfolderBase]: 1913/2976 cut-off events. [2024-06-27 20:40:06,353 INFO L125 PetriNetUnfolderBase]: For 76391/76393 co-relation queries the response was YES. [2024-06-27 20:40:06,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17386 conditions, 2976 events. 1913/2976 cut-off events. For 76391/76393 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 15185 event pairs, 357 based on Foata normal form. 16/2987 useless extension candidates. Maximal degree in co-relation 17334. Up to 1749 conditions per place. [2024-06-27 20:40:06,372 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 113 selfloop transitions, 68 changer transitions 0/185 dead transitions. [2024-06-27 20:40:06,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 185 transitions, 1838 flow [2024-06-27 20:40:06,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:40:06,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:40:06,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:40:06,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-27 20:40:06,377 INFO L175 Difference]: Start difference. First operand has 112 places, 144 transitions, 1212 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:40:06,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 185 transitions, 1838 flow [2024-06-27 20:40:06,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 185 transitions, 1764 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 20:40:06,459 INFO L231 Difference]: Finished difference. Result has 114 places, 146 transitions, 1334 flow [2024-06-27 20:40:06,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1138, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1334, PETRI_PLACES=114, PETRI_TRANSITIONS=146} [2024-06-27 20:40:06,460 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 73 predicate places. [2024-06-27 20:40:06,460 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 146 transitions, 1334 flow [2024-06-27 20:40:06,460 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 20:40:06,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:06,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:40:06,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 20:40:06,461 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 20:40:06,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:06,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1835423331, now seen corresponding path program 2 times [2024-06-27 20:40:06,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:06,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312502934] [2024-06-27 20:40:06,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:06,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:06,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:07,028 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 20:40:07,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:07,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312502934] [2024-06-27 20:40:07,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312502934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:07,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:07,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:40:07,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774644844] [2024-06-27 20:40:07,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:07,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:40:07,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:07,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:40:07,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:40:07,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:40:07,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 146 transitions, 1334 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 20:40:07,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:07,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:40:07,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:07,797 INFO L124 PetriNetUnfolderBase]: 1971/3069 cut-off events. [2024-06-27 20:40:07,797 INFO L125 PetriNetUnfolderBase]: For 83212/83214 co-relation queries the response was YES. [2024-06-27 20:40:07,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18389 conditions, 3069 events. 1971/3069 cut-off events. For 83212/83214 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 15759 event pairs, 499 based on Foata normal form. 16/3080 useless extension candidates. Maximal degree in co-relation 18337. Up to 2256 conditions per place. [2024-06-27 20:40:07,813 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 110 selfloop transitions, 71 changer transitions 0/185 dead transitions. [2024-06-27 20:40:07,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 185 transitions, 1842 flow [2024-06-27 20:40:07,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:40:07,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:40:07,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:40:07,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-27 20:40:07,815 INFO L175 Difference]: Start difference. First operand has 114 places, 146 transitions, 1334 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:40:07,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 185 transitions, 1842 flow [2024-06-27 20:40:07,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 185 transitions, 1757 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 20:40:07,896 INFO L231 Difference]: Finished difference. Result has 118 places, 147 transitions, 1427 flow [2024-06-27 20:40:07,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1249, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1427, PETRI_PLACES=118, PETRI_TRANSITIONS=147} [2024-06-27 20:40:07,896 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 77 predicate places. [2024-06-27 20:40:07,897 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 147 transitions, 1427 flow [2024-06-27 20:40:07,897 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 20:40:07,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:07,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:40:07,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 20:40:07,897 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 20:40:07,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:07,898 INFO L85 PathProgramCache]: Analyzing trace with hash -613869959, now seen corresponding path program 1 times [2024-06-27 20:40:07,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:07,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870872677] [2024-06-27 20:40:07,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:07,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:07,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:08,320 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 20:40:08,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:08,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870872677] [2024-06-27 20:40:08,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870872677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:08,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:08,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:40:08,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149738253] [2024-06-27 20:40:08,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:08,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:40:08,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:08,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:40:08,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:40:08,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:40:08,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 147 transitions, 1427 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 20:40:08,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:08,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:40:08,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:08,793 INFO L124 PetriNetUnfolderBase]: 1981/3091 cut-off events. [2024-06-27 20:40:08,793 INFO L125 PetriNetUnfolderBase]: For 84721/84730 co-relation queries the response was YES. [2024-06-27 20:40:08,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18938 conditions, 3091 events. 1981/3091 cut-off events. For 84721/84730 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 16030 event pairs, 566 based on Foata normal form. 10/3098 useless extension candidates. Maximal degree in co-relation 18884. Up to 2856 conditions per place. [2024-06-27 20:40:08,812 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 135 selfloop transitions, 35 changer transitions 0/174 dead transitions. [2024-06-27 20:40:08,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 174 transitions, 1887 flow [2024-06-27 20:40:08,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:40:08,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:40:08,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 20:40:08,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-27 20:40:08,813 INFO L175 Difference]: Start difference. First operand has 118 places, 147 transitions, 1427 flow. Second operand 7 states and 122 transitions. [2024-06-27 20:40:08,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 174 transitions, 1887 flow [2024-06-27 20:40:08,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 174 transitions, 1727 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 20:40:08,905 INFO L231 Difference]: Finished difference. Result has 119 places, 151 transitions, 1395 flow [2024-06-27 20:40:08,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1267, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1395, PETRI_PLACES=119, PETRI_TRANSITIONS=151} [2024-06-27 20:40:08,905 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 78 predicate places. [2024-06-27 20:40:08,906 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 151 transitions, 1395 flow [2024-06-27 20:40:08,906 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 20:40:08,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:08,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:40:08,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 20:40:08,906 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 20:40:08,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:08,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1738602939, now seen corresponding path program 3 times [2024-06-27 20:40:08,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:08,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605070674] [2024-06-27 20:40:08,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:08,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:08,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:09,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:40:09,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:09,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605070674] [2024-06-27 20:40:09,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605070674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:09,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:09,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:40:09,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405284766] [2024-06-27 20:40:09,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:09,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:40:09,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:09,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:40:09,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:40:09,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:40:09,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 151 transitions, 1395 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 20:40:09,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:09,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:40:09,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:10,146 INFO L124 PetriNetUnfolderBase]: 2100/3309 cut-off events. [2024-06-27 20:40:10,147 INFO L125 PetriNetUnfolderBase]: For 99368/99374 co-relation queries the response was YES. [2024-06-27 20:40:10,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20371 conditions, 3309 events. 2100/3309 cut-off events. For 99368/99374 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 17594 event pairs, 417 based on Foata normal form. 22/3326 useless extension candidates. Maximal degree in co-relation 20316. Up to 2373 conditions per place. [2024-06-27 20:40:10,168 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 119 selfloop transitions, 73 changer transitions 0/196 dead transitions. [2024-06-27 20:40:10,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 196 transitions, 2081 flow [2024-06-27 20:40:10,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:40:10,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:40:10,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 20:40:10,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.484375 [2024-06-27 20:40:10,170 INFO L175 Difference]: Start difference. First operand has 119 places, 151 transitions, 1395 flow. Second operand 8 states and 155 transitions. [2024-06-27 20:40:10,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 196 transitions, 2081 flow [2024-06-27 20:40:10,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 196 transitions, 1983 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 20:40:10,267 INFO L231 Difference]: Finished difference. Result has 122 places, 153 transitions, 1511 flow [2024-06-27 20:40:10,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1297, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1511, PETRI_PLACES=122, PETRI_TRANSITIONS=153} [2024-06-27 20:40:10,268 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 81 predicate places. [2024-06-27 20:40:10,268 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 153 transitions, 1511 flow [2024-06-27 20:40:10,268 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 20:40:10,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:10,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:40:10,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 20:40:10,268 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 20:40:10,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:10,269 INFO L85 PathProgramCache]: Analyzing trace with hash -763803945, now seen corresponding path program 4 times [2024-06-27 20:40:10,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:10,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892697380] [2024-06-27 20:40:10,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:10,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:10,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:10,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:40:10,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:10,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892697380] [2024-06-27 20:40:10,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892697380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:10,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:10,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:40:10,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452011752] [2024-06-27 20:40:10,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:10,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:40:10,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:10,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:40:10,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:40:10,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:40:10,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 153 transitions, 1511 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 20:40:10,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:10,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:40:10,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:11,584 INFO L124 PetriNetUnfolderBase]: 2175/3434 cut-off events. [2024-06-27 20:40:11,585 INFO L125 PetriNetUnfolderBase]: For 110170/110176 co-relation queries the response was YES. [2024-06-27 20:40:11,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21496 conditions, 3434 events. 2175/3434 cut-off events. For 110170/110176 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 18527 event pairs, 562 based on Foata normal form. 26/3455 useless extension candidates. Maximal degree in co-relation 21440. Up to 2749 conditions per place. [2024-06-27 20:40:11,610 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 119 selfloop transitions, 70 changer transitions 0/193 dead transitions. [2024-06-27 20:40:11,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 193 transitions, 2049 flow [2024-06-27 20:40:11,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:40:11,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:40:11,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:40:11,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-27 20:40:11,612 INFO L175 Difference]: Start difference. First operand has 122 places, 153 transitions, 1511 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:40:11,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 193 transitions, 2049 flow [2024-06-27 20:40:11,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 193 transitions, 1945 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 20:40:11,755 INFO L231 Difference]: Finished difference. Result has 126 places, 154 transitions, 1590 flow [2024-06-27 20:40:11,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1407, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1590, PETRI_PLACES=126, PETRI_TRANSITIONS=154} [2024-06-27 20:40:11,756 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 85 predicate places. [2024-06-27 20:40:11,756 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 154 transitions, 1590 flow [2024-06-27 20:40:11,756 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 20:40:11,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:11,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:40:11,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 20:40:11,756 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 20:40:11,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:11,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1555671741, now seen corresponding path program 5 times [2024-06-27 20:40:11,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:11,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303312160] [2024-06-27 20:40:11,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:11,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:11,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:12,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:40:12,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:12,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303312160] [2024-06-27 20:40:12,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303312160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:12,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:12,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:40:12,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125823119] [2024-06-27 20:40:12,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:12,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:40:12,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:12,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:40:12,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:40:12,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:40:12,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 154 transitions, 1590 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 20:40:12,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:12,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:40:12,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:12,940 INFO L124 PetriNetUnfolderBase]: 2250/3551 cut-off events. [2024-06-27 20:40:12,940 INFO L125 PetriNetUnfolderBase]: For 117738/117740 co-relation queries the response was YES. [2024-06-27 20:40:12,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22526 conditions, 3551 events. 2250/3551 cut-off events. For 117738/117740 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 19360 event pairs, 558 based on Foata normal form. 20/3566 useless extension candidates. Maximal degree in co-relation 22468. Up to 2874 conditions per place. [2024-06-27 20:40:12,965 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 121 selfloop transitions, 66 changer transitions 0/191 dead transitions. [2024-06-27 20:40:12,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 191 transitions, 2114 flow [2024-06-27 20:40:12,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:40:12,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:40:12,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 20:40:12,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45625 [2024-06-27 20:40:12,968 INFO L175 Difference]: Start difference. First operand has 126 places, 154 transitions, 1590 flow. Second operand 8 states and 146 transitions. [2024-06-27 20:40:12,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 191 transitions, 2114 flow [2024-06-27 20:40:13,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 191 transitions, 1959 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 20:40:13,077 INFO L231 Difference]: Finished difference. Result has 128 places, 155 transitions, 1612 flow [2024-06-27 20:40:13,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1435, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1612, PETRI_PLACES=128, PETRI_TRANSITIONS=155} [2024-06-27 20:40:13,078 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 87 predicate places. [2024-06-27 20:40:13,078 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 155 transitions, 1612 flow [2024-06-27 20:40:13,078 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 20:40:13,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:13,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:40:13,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 20:40:13,079 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 20:40:13,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:13,079 INFO L85 PathProgramCache]: Analyzing trace with hash -758226363, now seen corresponding path program 1 times [2024-06-27 20:40:13,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:13,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685974683] [2024-06-27 20:40:13,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:13,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:13,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:13,774 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 20:40:13,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:13,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685974683] [2024-06-27 20:40:13,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685974683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:13,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:13,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:40:13,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026750917] [2024-06-27 20:40:13,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:13,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:40:13,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:13,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:40:13,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:40:13,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:40:13,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 155 transitions, 1612 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:40:13,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:13,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:40:13,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:14,484 INFO L124 PetriNetUnfolderBase]: 2291/3624 cut-off events. [2024-06-27 20:40:14,485 INFO L125 PetriNetUnfolderBase]: For 120749/120751 co-relation queries the response was YES. [2024-06-27 20:40:14,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22940 conditions, 3624 events. 2291/3624 cut-off events. For 120749/120751 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 19957 event pairs, 564 based on Foata normal form. 12/3631 useless extension candidates. Maximal degree in co-relation 22881. Up to 2540 conditions per place. [2024-06-27 20:40:14,553 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 120 selfloop transitions, 69 changer transitions 0/193 dead transitions. [2024-06-27 20:40:14,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 193 transitions, 2142 flow [2024-06-27 20:40:14,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:40:14,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:40:14,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 20:40:14,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.459375 [2024-06-27 20:40:14,555 INFO L175 Difference]: Start difference. First operand has 128 places, 155 transitions, 1612 flow. Second operand 8 states and 147 transitions. [2024-06-27 20:40:14,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 193 transitions, 2142 flow [2024-06-27 20:40:14,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 193 transitions, 1993 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 20:40:14,711 INFO L231 Difference]: Finished difference. Result has 130 places, 156 transitions, 1642 flow [2024-06-27 20:40:14,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1463, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1642, PETRI_PLACES=130, PETRI_TRANSITIONS=156} [2024-06-27 20:40:14,711 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 89 predicate places. [2024-06-27 20:40:14,712 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 156 transitions, 1642 flow [2024-06-27 20:40:14,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:40:14,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:14,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:40:14,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 20:40:14,712 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 20:40:14,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:14,713 INFO L85 PathProgramCache]: Analyzing trace with hash -91931603, now seen corresponding path program 1 times [2024-06-27 20:40:14,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:14,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997883206] [2024-06-27 20:40:14,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:14,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:14,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:15,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:40:15,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:15,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997883206] [2024-06-27 20:40:15,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997883206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:15,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:15,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:40:15,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284554246] [2024-06-27 20:40:15,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:15,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:40:15,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:15,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:40:15,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:40:15,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:40:15,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 156 transitions, 1642 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 20:40:15,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:15,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:40:15,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:15,674 INFO L124 PetriNetUnfolderBase]: 2296/3642 cut-off events. [2024-06-27 20:40:15,674 INFO L125 PetriNetUnfolderBase]: For 120246/120252 co-relation queries the response was YES. [2024-06-27 20:40:15,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23074 conditions, 3642 events. 2296/3642 cut-off events. For 120246/120252 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 20176 event pairs, 692 based on Foata normal form. 7/3647 useless extension candidates. Maximal degree in co-relation 23014. Up to 3502 conditions per place. [2024-06-27 20:40:15,702 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 156 selfloop transitions, 16 changer transitions 0/176 dead transitions. [2024-06-27 20:40:15,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 176 transitions, 2090 flow [2024-06-27 20:40:15,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:40:15,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:40:15,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-27 20:40:15,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3964285714285714 [2024-06-27 20:40:15,705 INFO L175 Difference]: Start difference. First operand has 130 places, 156 transitions, 1642 flow. Second operand 7 states and 111 transitions. [2024-06-27 20:40:15,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 176 transitions, 2090 flow [2024-06-27 20:40:15,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 176 transitions, 1931 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 20:40:15,872 INFO L231 Difference]: Finished difference. Result has 131 places, 159 transitions, 1575 flow [2024-06-27 20:40:15,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1483, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1575, PETRI_PLACES=131, PETRI_TRANSITIONS=159} [2024-06-27 20:40:15,872 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 90 predicate places. [2024-06-27 20:40:15,873 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 159 transitions, 1575 flow [2024-06-27 20:40:15,873 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 20:40:15,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:15,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:40:15,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 20:40:15,873 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 20:40:15,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:15,874 INFO L85 PathProgramCache]: Analyzing trace with hash -91931975, now seen corresponding path program 2 times [2024-06-27 20:40:15,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:15,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023221851] [2024-06-27 20:40:15,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:15,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:15,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:16,331 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 20:40:16,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:16,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023221851] [2024-06-27 20:40:16,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023221851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:16,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:16,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:40:16,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269462222] [2024-06-27 20:40:16,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:16,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:40:16,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:16,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:40:16,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:40:16,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:40:16,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 159 transitions, 1575 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 20:40:16,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:16,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:40:16,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:16,911 INFO L124 PetriNetUnfolderBase]: 2324/3680 cut-off events. [2024-06-27 20:40:16,911 INFO L125 PetriNetUnfolderBase]: For 123755/123760 co-relation queries the response was YES. [2024-06-27 20:40:16,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23259 conditions, 3680 events. 2324/3680 cut-off events. For 123755/123760 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 20400 event pairs, 678 based on Foata normal form. 4/3681 useless extension candidates. Maximal degree in co-relation 23198. Up to 3386 conditions per place. [2024-06-27 20:40:16,938 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 142 selfloop transitions, 38 changer transitions 0/184 dead transitions. [2024-06-27 20:40:16,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 184 transitions, 2161 flow [2024-06-27 20:40:16,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:40:16,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:40:16,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 20:40:16,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-27 20:40:16,939 INFO L175 Difference]: Start difference. First operand has 131 places, 159 transitions, 1575 flow. Second operand 7 states and 118 transitions. [2024-06-27 20:40:16,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 184 transitions, 2161 flow [2024-06-27 20:40:17,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 184 transitions, 2091 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 20:40:17,142 INFO L231 Difference]: Finished difference. Result has 134 places, 167 transitions, 1722 flow [2024-06-27 20:40:17,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1505, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1722, PETRI_PLACES=134, PETRI_TRANSITIONS=167} [2024-06-27 20:40:17,142 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 93 predicate places. [2024-06-27 20:40:17,142 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 167 transitions, 1722 flow [2024-06-27 20:40:17,143 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 20:40:17,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:17,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:40:17,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 20:40:17,143 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 20:40:17,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:17,143 INFO L85 PathProgramCache]: Analyzing trace with hash 70353319, now seen corresponding path program 6 times [2024-06-27 20:40:17,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:17,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212859256] [2024-06-27 20:40:17,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:17,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:17,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:17,685 INFO 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 20:40:17,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:17,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212859256] [2024-06-27 20:40:17,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212859256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:17,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:17,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:40:17,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815701951] [2024-06-27 20:40:17,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:17,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:40:17,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:17,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:40:17,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:40:17,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:40:17,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 167 transitions, 1722 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 20:40:17,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:17,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:40:17,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:18,372 INFO L124 PetriNetUnfolderBase]: 2288/3629 cut-off events. [2024-06-27 20:40:18,372 INFO L125 PetriNetUnfolderBase]: For 131119/131128 co-relation queries the response was YES. [2024-06-27 20:40:18,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23104 conditions, 3629 events. 2288/3629 cut-off events. For 131119/131128 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 20030 event pairs, 573 based on Foata normal form. 23/3640 useless extension candidates. Maximal degree in co-relation 23041. Up to 2941 conditions per place. [2024-06-27 20:40:18,398 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 132 selfloop transitions, 63 changer transitions 0/199 dead transitions. [2024-06-27 20:40:18,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 199 transitions, 2220 flow [2024-06-27 20:40:18,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:40:18,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:40:18,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 20:40:18,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-27 20:40:18,400 INFO L175 Difference]: Start difference. First operand has 134 places, 167 transitions, 1722 flow. Second operand 8 states and 141 transitions. [2024-06-27 20:40:18,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 199 transitions, 2220 flow [2024-06-27 20:40:18,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 199 transitions, 2122 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-27 20:40:18,584 INFO L231 Difference]: Finished difference. Result has 139 places, 167 transitions, 1759 flow [2024-06-27 20:40:18,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1624, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1759, PETRI_PLACES=139, PETRI_TRANSITIONS=167} [2024-06-27 20:40:18,585 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 98 predicate places. [2024-06-27 20:40:18,585 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 167 transitions, 1759 flow [2024-06-27 20:40:18,585 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 20:40:18,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:18,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:40:18,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 20:40:18,586 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 20:40:18,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:18,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1111357481, now seen corresponding path program 2 times [2024-06-27 20:40:18,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:18,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84260137] [2024-06-27 20:40:18,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:18,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:18,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:19,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:40:19,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:19,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84260137] [2024-06-27 20:40:19,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84260137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:19,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:19,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:40:19,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087744273] [2024-06-27 20:40:19,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:19,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:40:19,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:19,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:40:19,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:40:19,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:40:19,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 167 transitions, 1759 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:40:19,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:19,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:40:19,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:20,005 INFO L124 PetriNetUnfolderBase]: 2268/3593 cut-off events. [2024-06-27 20:40:20,006 INFO L125 PetriNetUnfolderBase]: For 125356/125365 co-relation queries the response was YES. [2024-06-27 20:40:20,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22853 conditions, 3593 events. 2268/3593 cut-off events. For 125356/125365 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 19745 event pairs, 550 based on Foata normal form. 15/3596 useless extension candidates. Maximal degree in co-relation 22788. Up to 2819 conditions per place. [2024-06-27 20:40:20,038 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 132 selfloop transitions, 65 changer transitions 0/201 dead transitions. [2024-06-27 20:40:20,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 201 transitions, 2271 flow [2024-06-27 20:40:20,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:40:20,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:40:20,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 20:40:20,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446875 [2024-06-27 20:40:20,040 INFO L175 Difference]: Start difference. First operand has 139 places, 167 transitions, 1759 flow. Second operand 8 states and 143 transitions. [2024-06-27 20:40:20,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 201 transitions, 2271 flow [2024-06-27 20:40:20,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 201 transitions, 2114 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 20:40:20,250 INFO L231 Difference]: Finished difference. Result has 140 places, 167 transitions, 1738 flow [2024-06-27 20:40:20,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1602, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1738, PETRI_PLACES=140, PETRI_TRANSITIONS=167} [2024-06-27 20:40:20,250 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 99 predicate places. [2024-06-27 20:40:20,250 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 167 transitions, 1738 flow [2024-06-27 20:40:20,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:40:20,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:20,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:40:20,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 20:40:20,251 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 20:40:20,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:20,251 INFO L85 PathProgramCache]: Analyzing trace with hash 77977831, now seen corresponding path program 3 times [2024-06-27 20:40:20,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:20,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338230374] [2024-06-27 20:40:20,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:20,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:20,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:21,010 INFO 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 20:40:21,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:21,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338230374] [2024-06-27 20:40:21,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338230374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:21,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:21,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:40:21,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536793338] [2024-06-27 20:40:21,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:21,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:40:21,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:21,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:40:21,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:40:21,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:40:21,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 167 transitions, 1738 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:40:21,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:21,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:40:21,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:21,755 INFO L124 PetriNetUnfolderBase]: 2248/3561 cut-off events. [2024-06-27 20:40:21,755 INFO L125 PetriNetUnfolderBase]: For 123307/123316 co-relation queries the response was YES. [2024-06-27 20:40:21,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22262 conditions, 3561 events. 2248/3561 cut-off events. For 123307/123316 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 19540 event pairs, 502 based on Foata normal form. 15/3564 useless extension candidates. Maximal degree in co-relation 22196. Up to 2137 conditions per place. [2024-06-27 20:40:21,778 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 123 selfloop transitions, 73 changer transitions 0/200 dead transitions. [2024-06-27 20:40:21,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 200 transitions, 2186 flow [2024-06-27 20:40:21,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:40:21,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:40:21,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 20:40:21,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-27 20:40:21,780 INFO L175 Difference]: Start difference. First operand has 140 places, 167 transitions, 1738 flow. Second operand 8 states and 141 transitions. [2024-06-27 20:40:21,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 200 transitions, 2186 flow [2024-06-27 20:40:21,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 200 transitions, 1954 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 20:40:21,994 INFO L231 Difference]: Finished difference. Result has 139 places, 166 transitions, 1596 flow [2024-06-27 20:40:21,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1446, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1596, PETRI_PLACES=139, PETRI_TRANSITIONS=166} [2024-06-27 20:40:21,995 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 98 predicate places. [2024-06-27 20:40:21,995 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 166 transitions, 1596 flow [2024-06-27 20:40:21,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:40:21,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:21,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:40:21,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 20:40:21,995 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 20:40:21,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:21,996 INFO L85 PathProgramCache]: Analyzing trace with hash 262343527, now seen corresponding path program 2 times [2024-06-27 20:40:21,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:21,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395571647] [2024-06-27 20:40:21,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:21,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:22,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:22,530 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 20:40:22,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:22,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395571647] [2024-06-27 20:40:22,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395571647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:22,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:22,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:40:22,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655266139] [2024-06-27 20:40:22,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:22,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:40:22,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:22,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:40:22,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:40:22,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:40:22,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 166 transitions, 1596 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 20:40:22,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:22,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:40:22,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:23,196 INFO L124 PetriNetUnfolderBase]: 2253/3572 cut-off events. [2024-06-27 20:40:23,196 INFO L125 PetriNetUnfolderBase]: For 121899/121901 co-relation queries the response was YES. [2024-06-27 20:40:23,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22023 conditions, 3572 events. 2253/3572 cut-off events. For 121899/121901 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 19646 event pairs, 672 based on Foata normal form. 1/3571 useless extension candidates. Maximal degree in co-relation 21957. Up to 3447 conditions per place. [2024-06-27 20:40:23,226 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 161 selfloop transitions, 14 changer transitions 0/179 dead transitions. [2024-06-27 20:40:23,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 179 transitions, 2032 flow [2024-06-27 20:40:23,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:40:23,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:40:23,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-06-27 20:40:23,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37142857142857144 [2024-06-27 20:40:23,227 INFO L175 Difference]: Start difference. First operand has 139 places, 166 transitions, 1596 flow. Second operand 7 states and 104 transitions. [2024-06-27 20:40:23,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 179 transitions, 2032 flow [2024-06-27 20:40:23,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 179 transitions, 1825 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 20:40:23,381 INFO L231 Difference]: Finished difference. Result has 139 places, 169 transitions, 1487 flow [2024-06-27 20:40:23,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1389, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1487, PETRI_PLACES=139, PETRI_TRANSITIONS=169} [2024-06-27 20:40:23,382 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 98 predicate places. [2024-06-27 20:40:23,383 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 169 transitions, 1487 flow [2024-06-27 20:40:23,383 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 20:40:23,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:23,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:40:23,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 20:40:23,383 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 20:40:23,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:23,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1578750881, now seen corresponding path program 3 times [2024-06-27 20:40:23,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:23,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030690339] [2024-06-27 20:40:23,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:23,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:23,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:23,876 INFO 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 20:40:23,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:23,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030690339] [2024-06-27 20:40:23,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030690339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:23,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:23,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:40:23,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347161604] [2024-06-27 20:40:23,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:23,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:40:23,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:23,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:40:23,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:40:23,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:40:23,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 169 transitions, 1487 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 20:40:23,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:23,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:40:23,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:24,363 INFO L124 PetriNetUnfolderBase]: 2250/3576 cut-off events. [2024-06-27 20:40:24,363 INFO L125 PetriNetUnfolderBase]: For 124618/124632 co-relation queries the response was YES. [2024-06-27 20:40:24,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21467 conditions, 3576 events. 2250/3576 cut-off events. For 124618/124632 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 19671 event pairs, 638 based on Foata normal form. 13/3585 useless extension candidates. Maximal degree in co-relation 21401. Up to 3409 conditions per place. [2024-06-27 20:40:24,385 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 152 selfloop transitions, 28 changer transitions 0/184 dead transitions. [2024-06-27 20:40:24,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 184 transitions, 1951 flow [2024-06-27 20:40:24,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:40:24,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:40:24,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-27 20:40:24,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-27 20:40:24,387 INFO L175 Difference]: Start difference. First operand has 139 places, 169 transitions, 1487 flow. Second operand 7 states and 108 transitions. [2024-06-27 20:40:24,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 184 transitions, 1951 flow [2024-06-27 20:40:24,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 184 transitions, 1875 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 20:40:24,545 INFO L231 Difference]: Finished difference. Result has 141 places, 172 transitions, 1543 flow [2024-06-27 20:40:24,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1411, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1543, PETRI_PLACES=141, PETRI_TRANSITIONS=172} [2024-06-27 20:40:24,546 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 100 predicate places. [2024-06-27 20:40:24,546 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 172 transitions, 1543 flow [2024-06-27 20:40:24,546 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 20:40:24,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:24,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:40:24,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 20:40:24,547 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 20:40:24,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:24,547 INFO L85 PathProgramCache]: Analyzing trace with hash 262331065, now seen corresponding path program 3 times [2024-06-27 20:40:24,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:24,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133316717] [2024-06-27 20:40:24,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:24,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:24,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:24,946 INFO 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 20:40:24,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:24,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133316717] [2024-06-27 20:40:24,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133316717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:24,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:24,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:40:24,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422621722] [2024-06-27 20:40:24,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:24,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:40:24,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:24,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:40:24,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:40:24,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:40:24,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 172 transitions, 1543 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 20:40:24,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:24,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:40:24,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:25,434 INFO L124 PetriNetUnfolderBase]: 2254/3571 cut-off events. [2024-06-27 20:40:25,434 INFO L125 PetriNetUnfolderBase]: For 130160/130169 co-relation queries the response was YES. [2024-06-27 20:40:25,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21818 conditions, 3571 events. 2254/3571 cut-off events. For 130160/130169 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 19590 event pairs, 649 based on Foata normal form. 5/3564 useless extension candidates. Maximal degree in co-relation 21751. Up to 3244 conditions per place. [2024-06-27 20:40:25,459 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 144 selfloop transitions, 50 changer transitions 0/198 dead transitions. [2024-06-27 20:40:25,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 198 transitions, 2287 flow [2024-06-27 20:40:25,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:40:25,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:40:25,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-27 20:40:25,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-27 20:40:25,461 INFO L175 Difference]: Start difference. First operand has 141 places, 172 transitions, 1543 flow. Second operand 7 states and 115 transitions. [2024-06-27 20:40:25,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 198 transitions, 2287 flow [2024-06-27 20:40:25,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 198 transitions, 2177 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 20:40:25,683 INFO L231 Difference]: Finished difference. Result has 145 places, 185 transitions, 1751 flow [2024-06-27 20:40:25,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1433, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1751, PETRI_PLACES=145, PETRI_TRANSITIONS=185} [2024-06-27 20:40:25,684 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 104 predicate places. [2024-06-27 20:40:25,684 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 185 transitions, 1751 flow [2024-06-27 20:40:25,684 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 20:40:25,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:25,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:40:25,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 20:40:25,684 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 20:40:25,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:25,685 INFO L85 PathProgramCache]: Analyzing trace with hash 816948625, now seen corresponding path program 1 times [2024-06-27 20:40:25,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:25,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768504764] [2024-06-27 20:40:25,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:25,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:25,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:26,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:40:26,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:26,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768504764] [2024-06-27 20:40:26,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768504764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:26,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:26,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:40:26,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395393243] [2024-06-27 20:40:26,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:26,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:40:26,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:26,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:40:26,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:40:26,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:40:26,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 185 transitions, 1751 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 20:40:26,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:26,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:40:26,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:26,594 INFO L124 PetriNetUnfolderBase]: 2182/3507 cut-off events. [2024-06-27 20:40:26,594 INFO L125 PetriNetUnfolderBase]: For 142246/142250 co-relation queries the response was YES. [2024-06-27 20:40:26,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22321 conditions, 3507 events. 2182/3507 cut-off events. For 142246/142250 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 19607 event pairs, 595 based on Foata normal form. 3/3508 useless extension candidates. Maximal degree in co-relation 22251. Up to 3249 conditions per place. [2024-06-27 20:40:26,623 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 177 selfloop transitions, 17 changer transitions 0/208 dead transitions. [2024-06-27 20:40:26,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 208 transitions, 2243 flow [2024-06-27 20:40:26,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:40:26,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:40:26,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 20:40:26,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-27 20:40:26,625 INFO L175 Difference]: Start difference. First operand has 145 places, 185 transitions, 1751 flow. Second operand 7 states and 118 transitions. [2024-06-27 20:40:26,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 208 transitions, 2243 flow [2024-06-27 20:40:26,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 208 transitions, 2137 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-27 20:40:26,834 INFO L231 Difference]: Finished difference. Result has 151 places, 191 transitions, 1751 flow [2024-06-27 20:40:26,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1645, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1751, PETRI_PLACES=151, PETRI_TRANSITIONS=191} [2024-06-27 20:40:26,835 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 110 predicate places. [2024-06-27 20:40:26,835 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 191 transitions, 1751 flow [2024-06-27 20:40:26,835 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 20:40:26,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:26,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:40:26,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 20:40:26,836 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 20:40:26,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:26,836 INFO L85 PathProgramCache]: Analyzing trace with hash 85384243, now seen corresponding path program 2 times [2024-06-27 20:40:26,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:26,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793492230] [2024-06-27 20:40:26,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:26,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:26,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:27,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:40:27,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:27,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793492230] [2024-06-27 20:40:27,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793492230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:27,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:27,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:40:27,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512170358] [2024-06-27 20:40:27,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:27,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:40:27,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:27,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:40:27,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:40:27,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:40:27,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 191 transitions, 1751 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 20:40:27,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:27,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:40:27,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:27,847 INFO L124 PetriNetUnfolderBase]: 2249/3600 cut-off events. [2024-06-27 20:40:27,847 INFO L125 PetriNetUnfolderBase]: For 153504/153508 co-relation queries the response was YES. [2024-06-27 20:40:27,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23338 conditions, 3600 events. 2249/3600 cut-off events. For 153504/153508 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 20113 event pairs, 619 based on Foata normal form. 5/3601 useless extension candidates. Maximal degree in co-relation 23265. Up to 3294 conditions per place. [2024-06-27 20:40:27,878 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 176 selfloop transitions, 26 changer transitions 0/216 dead transitions. [2024-06-27 20:40:27,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 216 transitions, 2401 flow [2024-06-27 20:40:27,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:40:27,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:40:27,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 20:40:27,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43214285714285716 [2024-06-27 20:40:27,880 INFO L175 Difference]: Start difference. First operand has 151 places, 191 transitions, 1751 flow. Second operand 7 states and 121 transitions. [2024-06-27 20:40:27,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 216 transitions, 2401 flow [2024-06-27 20:40:28,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 216 transitions, 2351 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-27 20:40:28,036 INFO L231 Difference]: Finished difference. Result has 156 places, 199 transitions, 1882 flow [2024-06-27 20:40:28,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1701, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1882, PETRI_PLACES=156, PETRI_TRANSITIONS=199} [2024-06-27 20:40:28,037 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 115 predicate places. [2024-06-27 20:40:28,037 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 199 transitions, 1882 flow [2024-06-27 20:40:28,037 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 20:40:28,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:28,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:40:28,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 20:40:28,037 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 20:40:28,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:28,038 INFO L85 PathProgramCache]: Analyzing trace with hash 262515763, now seen corresponding path program 3 times [2024-06-27 20:40:28,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:28,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761186761] [2024-06-27 20:40:28,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:28,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:28,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:28,578 INFO 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 20:40:28,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:28,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761186761] [2024-06-27 20:40:28,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761186761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:28,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:28,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:40:28,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69872590] [2024-06-27 20:40:28,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:28,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:40:28,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:28,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:40:28,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:40:28,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:40:28,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 199 transitions, 1882 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 20:40:28,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:28,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:40:28,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:29,167 INFO L124 PetriNetUnfolderBase]: 2251/3606 cut-off events. [2024-06-27 20:40:29,167 INFO L125 PetriNetUnfolderBase]: For 157839/157844 co-relation queries the response was YES. [2024-06-27 20:40:29,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23861 conditions, 3606 events. 2251/3606 cut-off events. For 157839/157844 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 20153 event pairs, 624 based on Foata normal form. 6/3604 useless extension candidates. Maximal degree in co-relation 23786. Up to 3252 conditions per place. [2024-06-27 20:40:29,198 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 169 selfloop transitions, 40 changer transitions 0/223 dead transitions. [2024-06-27 20:40:29,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 223 transitions, 2650 flow [2024-06-27 20:40:29,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:40:29,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:40:29,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 20:40:29,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-27 20:40:29,199 INFO L175 Difference]: Start difference. First operand has 156 places, 199 transitions, 1882 flow. Second operand 7 states and 124 transitions. [2024-06-27 20:40:29,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 223 transitions, 2650 flow [2024-06-27 20:40:29,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 223 transitions, 2576 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-27 20:40:29,425 INFO L231 Difference]: Finished difference. Result has 160 places, 207 transitions, 2031 flow [2024-06-27 20:40:29,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1812, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2031, PETRI_PLACES=160, PETRI_TRANSITIONS=207} [2024-06-27 20:40:29,426 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 119 predicate places. [2024-06-27 20:40:29,426 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 207 transitions, 2031 flow [2024-06-27 20:40:29,426 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 20:40:29,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:29,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:40:29,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 20:40:29,427 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 20:40:29,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:29,427 INFO L85 PathProgramCache]: Analyzing trace with hash 262762027, now seen corresponding path program 1 times [2024-06-27 20:40:29,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:29,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747551434] [2024-06-27 20:40:29,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:29,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:29,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:30,090 INFO 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 20:40:30,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:30,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747551434] [2024-06-27 20:40:30,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747551434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:30,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:30,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:40:30,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789612478] [2024-06-27 20:40:30,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:30,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:40:30,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:30,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:40:30,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:40:30,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:40:30,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 207 transitions, 2031 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 20:40:30,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:30,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:40:30,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:30,651 INFO L124 PetriNetUnfolderBase]: 2345/3700 cut-off events. [2024-06-27 20:40:30,652 INFO L125 PetriNetUnfolderBase]: For 158099/158101 co-relation queries the response was YES. [2024-06-27 20:40:30,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24720 conditions, 3700 events. 2345/3700 cut-off events. For 158099/158101 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 20203 event pairs, 655 based on Foata normal form. 2/3700 useless extension candidates. Maximal degree in co-relation 24643. Up to 3571 conditions per place. [2024-06-27 20:40:30,682 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 201 selfloop transitions, 16 changer transitions 0/221 dead transitions. [2024-06-27 20:40:30,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 221 transitions, 2549 flow [2024-06-27 20:40:30,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:40:30,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:40:30,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 116 transitions. [2024-06-27 20:40:30,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3625 [2024-06-27 20:40:30,684 INFO L175 Difference]: Start difference. First operand has 160 places, 207 transitions, 2031 flow. Second operand 8 states and 116 transitions. [2024-06-27 20:40:30,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 221 transitions, 2549 flow [2024-06-27 20:40:30,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 221 transitions, 2431 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-27 20:40:30,892 INFO L231 Difference]: Finished difference. Result has 164 places, 209 transitions, 2006 flow [2024-06-27 20:40:30,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1915, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2006, PETRI_PLACES=164, PETRI_TRANSITIONS=209} [2024-06-27 20:40:30,893 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 123 predicate places. [2024-06-27 20:40:30,893 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 209 transitions, 2006 flow [2024-06-27 20:40:30,893 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 20:40:30,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:30,893 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 20:40:30,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 20:40:30,894 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 20:40:30,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:30,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1444760327, now seen corresponding path program 1 times [2024-06-27 20:40:30,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:30,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339853171] [2024-06-27 20:40:30,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:30,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:30,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:31,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:40:31,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:31,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339853171] [2024-06-27 20:40:31,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339853171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:31,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:31,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:40:31,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093099363] [2024-06-27 20:40:31,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:31,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:40:31,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:31,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:40:31,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:40:31,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:40:31,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 209 transitions, 2006 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 20:40:31,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:31,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:40:31,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:31,926 INFO L124 PetriNetUnfolderBase]: 2355/3718 cut-off events. [2024-06-27 20:40:31,926 INFO L125 PetriNetUnfolderBase]: For 162756/162768 co-relation queries the response was YES. [2024-06-27 20:40:31,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24533 conditions, 3718 events. 2355/3718 cut-off events. For 162756/162768 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 20423 event pairs, 602 based on Foata normal form. 12/3727 useless extension candidates. Maximal degree in co-relation 24455. Up to 3449 conditions per place. [2024-06-27 20:40:31,956 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 194 selfloop transitions, 39 changer transitions 0/237 dead transitions. [2024-06-27 20:40:31,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 237 transitions, 2634 flow [2024-06-27 20:40:31,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:40:31,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:40:31,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 20:40:31,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-27 20:40:31,958 INFO L175 Difference]: Start difference. First operand has 164 places, 209 transitions, 2006 flow. Second operand 8 states and 134 transitions. [2024-06-27 20:40:31,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 237 transitions, 2634 flow [2024-06-27 20:40:32,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 237 transitions, 2559 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 20:40:32,162 INFO L231 Difference]: Finished difference. Result has 166 places, 213 transitions, 2106 flow [2024-06-27 20:40:32,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1931, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2106, PETRI_PLACES=166, PETRI_TRANSITIONS=213} [2024-06-27 20:40:32,162 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2024-06-27 20:40:32,162 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 213 transitions, 2106 flow [2024-06-27 20:40:32,163 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 20:40:32,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:32,163 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 20:40:32,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 20:40:32,163 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 20:40:32,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:32,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1439367164, now seen corresponding path program 1 times [2024-06-27 20:40:32,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:32,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776278219] [2024-06-27 20:40:32,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:32,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:32,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:32,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:40:32,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:32,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776278219] [2024-06-27 20:40:32,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776278219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:32,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:32,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:40:32,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446083992] [2024-06-27 20:40:32,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:32,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:40:32,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:32,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:40:32,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:40:32,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:40:32,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 213 transitions, 2106 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 20:40:32,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:32,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:40:32,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:33,132 INFO L124 PetriNetUnfolderBase]: 2365/3725 cut-off events. [2024-06-27 20:40:33,132 INFO L125 PetriNetUnfolderBase]: For 169774/169782 co-relation queries the response was YES. [2024-06-27 20:40:33,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25214 conditions, 3725 events. 2365/3725 cut-off events. For 169774/169782 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 20395 event pairs, 609 based on Foata normal form. 6/3728 useless extension candidates. Maximal degree in co-relation 25135. Up to 3465 conditions per place. [2024-06-27 20:40:33,164 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 198 selfloop transitions, 35 changer transitions 0/237 dead transitions. [2024-06-27 20:40:33,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 237 transitions, 2702 flow [2024-06-27 20:40:33,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:40:33,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:40:33,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 20:40:33,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-27 20:40:33,165 INFO L175 Difference]: Start difference. First operand has 166 places, 213 transitions, 2106 flow. Second operand 7 states and 118 transitions. [2024-06-27 20:40:33,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 237 transitions, 2702 flow [2024-06-27 20:40:33,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 237 transitions, 2555 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-27 20:40:33,472 INFO L231 Difference]: Finished difference. Result has 167 places, 217 transitions, 2110 flow [2024-06-27 20:40:33,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1959, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2110, PETRI_PLACES=167, PETRI_TRANSITIONS=217} [2024-06-27 20:40:33,473 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 126 predicate places. [2024-06-27 20:40:33,473 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 217 transitions, 2110 flow [2024-06-27 20:40:33,473 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 20:40:33,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:33,474 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 20:40:33,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 20:40:33,474 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 20:40:33,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:33,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1858642368, now seen corresponding path program 2 times [2024-06-27 20:40:33,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:33,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072479258] [2024-06-27 20:40:33,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:33,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:33,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:33,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:40:33,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:33,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072479258] [2024-06-27 20:40:33,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072479258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:33,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:33,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:40:33,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619451959] [2024-06-27 20:40:33,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:33,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:40:33,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:33,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:40:33,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:40:33,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:40:33,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 217 transitions, 2110 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 20:40:33,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:33,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:40:33,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:34,395 INFO L124 PetriNetUnfolderBase]: 2367/3729 cut-off events. [2024-06-27 20:40:34,395 INFO L125 PetriNetUnfolderBase]: For 175566/175574 co-relation queries the response was YES. [2024-06-27 20:40:34,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25262 conditions, 3729 events. 2367/3729 cut-off events. For 175566/175574 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 20434 event pairs, 610 based on Foata normal form. 6/3732 useless extension candidates. Maximal degree in co-relation 25182. Up to 3428 conditions per place. [2024-06-27 20:40:34,437 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 189 selfloop transitions, 44 changer transitions 0/237 dead transitions. [2024-06-27 20:40:34,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 237 transitions, 2784 flow [2024-06-27 20:40:34,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:40:34,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:40:34,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-27 20:40:34,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41785714285714287 [2024-06-27 20:40:34,439 INFO L175 Difference]: Start difference. First operand has 167 places, 217 transitions, 2110 flow. Second operand 7 states and 117 transitions. [2024-06-27 20:40:34,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 237 transitions, 2784 flow [2024-06-27 20:40:34,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 237 transitions, 2687 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 20:40:34,744 INFO L231 Difference]: Finished difference. Result has 169 places, 220 transitions, 2172 flow [2024-06-27 20:40:34,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2013, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2172, PETRI_PLACES=169, PETRI_TRANSITIONS=220} [2024-06-27 20:40:34,744 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 128 predicate places. [2024-06-27 20:40:34,744 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 220 transitions, 2172 flow [2024-06-27 20:40:34,745 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 20:40:34,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:34,745 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 20:40:34,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 20:40:34,745 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 20:40:34,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:34,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1445077457, now seen corresponding path program 2 times [2024-06-27 20:40:34,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:34,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377477556] [2024-06-27 20:40:34,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:34,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:34,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:35,214 INFO 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 20:40:35,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:35,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377477556] [2024-06-27 20:40:35,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377477556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:35,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:35,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:40:35,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438926482] [2024-06-27 20:40:35,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:35,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:40:35,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:35,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:40:35,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:40:35,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:40:35,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 220 transitions, 2172 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 20:40:35,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:35,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:40:35,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:35,844 INFO L124 PetriNetUnfolderBase]: 2411/3796 cut-off events. [2024-06-27 20:40:35,844 INFO L125 PetriNetUnfolderBase]: For 188442/188450 co-relation queries the response was YES. [2024-06-27 20:40:35,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26204 conditions, 3796 events. 2411/3796 cut-off events. For 188442/188450 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 20850 event pairs, 610 based on Foata normal form. 6/3799 useless extension candidates. Maximal degree in co-relation 26123. Up to 3440 conditions per place. [2024-06-27 20:40:35,876 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 190 selfloop transitions, 57 changer transitions 0/251 dead transitions. [2024-06-27 20:40:35,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 251 transitions, 3184 flow [2024-06-27 20:40:35,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:40:35,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:40:35,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 20:40:35,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-27 20:40:35,878 INFO L175 Difference]: Start difference. First operand has 169 places, 220 transitions, 2172 flow. Second operand 8 states and 133 transitions. [2024-06-27 20:40:35,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 251 transitions, 3184 flow [2024-06-27 20:40:36,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 251 transitions, 3086 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 20:40:36,151 INFO L231 Difference]: Finished difference. Result has 174 places, 232 transitions, 2503 flow [2024-06-27 20:40:36,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2074, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2503, PETRI_PLACES=174, PETRI_TRANSITIONS=232} [2024-06-27 20:40:36,152 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 133 predicate places. [2024-06-27 20:40:36,152 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 232 transitions, 2503 flow [2024-06-27 20:40:36,152 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 20:40:36,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:36,153 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 20:40:36,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 20:40:36,153 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 20:40:36,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:36,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1445089020, now seen corresponding path program 1 times [2024-06-27 20:40:36,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:36,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970551437] [2024-06-27 20:40:36,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:36,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:36,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:36,789 INFO 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 20:40:36,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:36,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970551437] [2024-06-27 20:40:36,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970551437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:36,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:36,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:40:36,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779355547] [2024-06-27 20:40:36,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:36,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:40:36,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:36,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:40:36,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:40:36,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:40:36,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 232 transitions, 2503 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 20:40:36,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:36,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:40:36,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:37,425 INFO L124 PetriNetUnfolderBase]: 2416/3807 cut-off events. [2024-06-27 20:40:37,426 INFO L125 PetriNetUnfolderBase]: For 197713/197717 co-relation queries the response was YES. [2024-06-27 20:40:37,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26966 conditions, 3807 events. 2416/3807 cut-off events. For 197713/197717 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 20904 event pairs, 625 based on Foata normal form. 5/3810 useless extension candidates. Maximal degree in co-relation 26883. Up to 3654 conditions per place. [2024-06-27 20:40:37,463 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 230 selfloop transitions, 19 changer transitions 0/253 dead transitions. [2024-06-27 20:40:37,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 253 transitions, 3133 flow [2024-06-27 20:40:37,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:40:37,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:40:37,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-27 20:40:37,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38125 [2024-06-27 20:40:37,464 INFO L175 Difference]: Start difference. First operand has 174 places, 232 transitions, 2503 flow. Second operand 8 states and 122 transitions. [2024-06-27 20:40:37,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 253 transitions, 3133 flow [2024-06-27 20:40:37,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 253 transitions, 2991 flow, removed 57 selfloop flow, removed 3 redundant places. [2024-06-27 20:40:37,806 INFO L231 Difference]: Finished difference. Result has 179 places, 235 transitions, 2485 flow [2024-06-27 20:40:37,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2363, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2485, PETRI_PLACES=179, PETRI_TRANSITIONS=235} [2024-06-27 20:40:37,806 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 138 predicate places. [2024-06-27 20:40:37,807 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 235 transitions, 2485 flow [2024-06-27 20:40:37,807 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 20:40:37,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:37,807 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 20:40:37,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 20:40:37,807 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 20:40:37,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:37,808 INFO L85 PathProgramCache]: Analyzing trace with hash -828556981, now seen corresponding path program 3 times [2024-06-27 20:40:37,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:37,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806381463] [2024-06-27 20:40:37,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:37,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:37,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:38,325 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 20:40:38,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:38,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806381463] [2024-06-27 20:40:38,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806381463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:38,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:38,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:40:38,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899347733] [2024-06-27 20:40:38,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:38,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:40:38,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:38,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:40:38,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:40:38,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:40:38,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 235 transitions, 2485 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 20:40:38,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:38,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:40:38,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:38,928 INFO L124 PetriNetUnfolderBase]: 2412/3799 cut-off events. [2024-06-27 20:40:38,928 INFO L125 PetriNetUnfolderBase]: For 201244/201252 co-relation queries the response was YES. [2024-06-27 20:40:38,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26951 conditions, 3799 events. 2412/3799 cut-off events. For 201244/201252 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 20914 event pairs, 609 based on Foata normal form. 6/3802 useless extension candidates. Maximal degree in co-relation 26866. Up to 3445 conditions per place. [2024-06-27 20:40:38,963 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 194 selfloop transitions, 56 changer transitions 0/254 dead transitions. [2024-06-27 20:40:38,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 254 transitions, 3245 flow [2024-06-27 20:40:38,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:40:38,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:40:38,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 20:40:38,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-27 20:40:38,964 INFO L175 Difference]: Start difference. First operand has 179 places, 235 transitions, 2485 flow. Second operand 8 states and 132 transitions. [2024-06-27 20:40:38,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 254 transitions, 3245 flow [2024-06-27 20:40:39,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 254 transitions, 3081 flow, removed 65 selfloop flow, removed 6 redundant places. [2024-06-27 20:40:39,303 INFO L231 Difference]: Finished difference. Result has 181 places, 235 transitions, 2441 flow [2024-06-27 20:40:39,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2321, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2441, PETRI_PLACES=181, PETRI_TRANSITIONS=235} [2024-06-27 20:40:39,303 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2024-06-27 20:40:39,303 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 235 transitions, 2441 flow [2024-06-27 20:40:39,304 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 20:40:39,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:39,304 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 20:40:39,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 20:40:39,304 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 20:40:39,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:39,304 INFO L85 PathProgramCache]: Analyzing trace with hash -452111876, now seen corresponding path program 3 times [2024-06-27 20:40:39,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:39,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877634579] [2024-06-27 20:40:39,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:39,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:39,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:39,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:40:39,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:39,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877634579] [2024-06-27 20:40:39,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877634579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:39,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:39,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:40:39,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669895884] [2024-06-27 20:40:39,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:39,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:40:39,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:39,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:40:39,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:40:39,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:40:39,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 235 transitions, 2441 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 20:40:39,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:39,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:40:39,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:40,338 INFO L124 PetriNetUnfolderBase]: 2405/3784 cut-off events. [2024-06-27 20:40:40,339 INFO L125 PetriNetUnfolderBase]: For 205758/205762 co-relation queries the response was YES. [2024-06-27 20:40:40,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26983 conditions, 3784 events. 2405/3784 cut-off events. For 205758/205762 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 20777 event pairs, 613 based on Foata normal form. 1/3775 useless extension candidates. Maximal degree in co-relation 26897. Up to 3530 conditions per place. [2024-06-27 20:40:40,374 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 214 selfloop transitions, 35 changer transitions 0/253 dead transitions. [2024-06-27 20:40:40,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 253 transitions, 3001 flow [2024-06-27 20:40:40,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:40:40,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:40:40,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-27 20:40:40,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-27 20:40:40,376 INFO L175 Difference]: Start difference. First operand has 181 places, 235 transitions, 2441 flow. Second operand 7 states and 115 transitions. [2024-06-27 20:40:40,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 253 transitions, 3001 flow [2024-06-27 20:40:40,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 253 transitions, 2840 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-27 20:40:40,796 INFO L231 Difference]: Finished difference. Result has 181 places, 235 transitions, 2357 flow [2024-06-27 20:40:40,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2280, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2357, PETRI_PLACES=181, PETRI_TRANSITIONS=235} [2024-06-27 20:40:40,797 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2024-06-27 20:40:40,797 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 235 transitions, 2357 flow [2024-06-27 20:40:40,797 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 20:40:40,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:40,798 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 20:40:40,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 20:40:40,798 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 20:40:40,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:40,798 INFO L85 PathProgramCache]: Analyzing trace with hash 947651888, now seen corresponding path program 4 times [2024-06-27 20:40:40,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:40,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783750290] [2024-06-27 20:40:40,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:40,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:40,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:41,253 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 20:40:41,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:41,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783750290] [2024-06-27 20:40:41,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783750290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:41,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:41,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:40:41,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793692025] [2024-06-27 20:40:41,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:41,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:40:41,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:41,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:40:41,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:40:41,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:40:41,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 235 transitions, 2357 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 20:40:41,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:41,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:40:41,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:41,847 INFO L124 PetriNetUnfolderBase]: 2410/3789 cut-off events. [2024-06-27 20:40:41,847 INFO L125 PetriNetUnfolderBase]: For 212660/212664 co-relation queries the response was YES. [2024-06-27 20:40:41,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27059 conditions, 3789 events. 2410/3789 cut-off events. For 212660/212664 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 20758 event pairs, 611 based on Foata normal form. 1/3780 useless extension candidates. Maximal degree in co-relation 26973. Up to 3517 conditions per place. [2024-06-27 20:40:41,881 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 206 selfloop transitions, 44 changer transitions 0/254 dead transitions. [2024-06-27 20:40:41,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 254 transitions, 2972 flow [2024-06-27 20:40:41,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:40:41,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:40:41,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-27 20:40:41,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-27 20:40:41,882 INFO L175 Difference]: Start difference. First operand has 181 places, 235 transitions, 2357 flow. Second operand 7 states and 114 transitions. [2024-06-27 20:40:41,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 254 transitions, 2972 flow [2024-06-27 20:40:42,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 254 transitions, 2838 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 20:40:42,262 INFO L231 Difference]: Finished difference. Result has 182 places, 239 transitions, 2406 flow [2024-06-27 20:40:42,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2223, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2406, PETRI_PLACES=182, PETRI_TRANSITIONS=239} [2024-06-27 20:40:42,262 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 141 predicate places. [2024-06-27 20:40:42,263 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 239 transitions, 2406 flow [2024-06-27 20:40:42,263 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 20:40:42,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:42,263 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 20:40:42,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 20:40:42,263 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 20:40:42,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:42,264 INFO L85 PathProgramCache]: Analyzing trace with hash -457666564, now seen corresponding path program 5 times [2024-06-27 20:40:42,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:42,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146968786] [2024-06-27 20:40:42,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:42,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:42,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:42,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:40:42,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:42,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146968786] [2024-06-27 20:40:42,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146968786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:42,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:42,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:40:42,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718747491] [2024-06-27 20:40:42,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:42,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:40:42,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:42,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:40:42,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:40:42,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:40:42,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 239 transitions, 2406 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 20:40:42,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:42,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:40:42,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:43,366 INFO L124 PetriNetUnfolderBase]: 2412/3799 cut-off events. [2024-06-27 20:40:43,380 INFO L125 PetriNetUnfolderBase]: For 220556/220566 co-relation queries the response was YES. [2024-06-27 20:40:43,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27193 conditions, 3799 events. 2412/3799 cut-off events. For 220556/220566 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 20870 event pairs, 631 based on Foata normal form. 6/3793 useless extension candidates. Maximal degree in co-relation 27105. Up to 3457 conditions per place. [2024-06-27 20:40:43,413 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 190 selfloop transitions, 60 changer transitions 0/254 dead transitions. [2024-06-27 20:40:43,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 254 transitions, 3108 flow [2024-06-27 20:40:43,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:40:43,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:40:43,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-27 20:40:43,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-27 20:40:43,415 INFO L175 Difference]: Start difference. First operand has 182 places, 239 transitions, 2406 flow. Second operand 7 states and 114 transitions. [2024-06-27 20:40:43,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 254 transitions, 3108 flow [2024-06-27 20:40:43,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 254 transitions, 2998 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 20:40:43,870 INFO L231 Difference]: Finished difference. Result has 185 places, 242 transitions, 2484 flow [2024-06-27 20:40:43,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2296, PETRI_DIFFERENCE_MINUEND_PLACES=178, 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=2484, PETRI_PLACES=185, PETRI_TRANSITIONS=242} [2024-06-27 20:40:43,871 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 144 predicate places. [2024-06-27 20:40:43,871 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 242 transitions, 2484 flow [2024-06-27 20:40:43,871 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 20:40:43,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:43,871 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 20:40:43,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 20:40:43,871 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 20:40:43,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:43,872 INFO L85 PathProgramCache]: Analyzing trace with hash -451952644, now seen corresponding path program 6 times [2024-06-27 20:40:43,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:43,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500092803] [2024-06-27 20:40:43,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:43,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:43,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:44,379 INFO 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 20:40:44,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:44,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500092803] [2024-06-27 20:40:44,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500092803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:44,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:44,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:40:44,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688551786] [2024-06-27 20:40:44,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:44,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:40:44,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:44,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:40:44,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:40:44,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:40:44,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 242 transitions, 2484 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 20:40:44,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:44,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:40:44,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:44,985 INFO L124 PetriNetUnfolderBase]: 2407/3791 cut-off events. [2024-06-27 20:40:44,985 INFO L125 PetriNetUnfolderBase]: For 225176/225186 co-relation queries the response was YES. [2024-06-27 20:40:45,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27247 conditions, 3791 events. 2407/3791 cut-off events. For 225176/225186 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 20818 event pairs, 631 based on Foata normal form. 5/3784 useless extension candidates. Maximal degree in co-relation 27158. Up to 3452 conditions per place. [2024-06-27 20:40:45,022 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 185 selfloop transitions, 64 changer transitions 0/253 dead transitions. [2024-06-27 20:40:45,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 253 transitions, 3016 flow [2024-06-27 20:40:45,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:40:45,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:40:45,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-27 20:40:45,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 20:40:45,023 INFO L175 Difference]: Start difference. First operand has 185 places, 242 transitions, 2484 flow. Second operand 7 states and 112 transitions. [2024-06-27 20:40:45,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 253 transitions, 3016 flow [2024-06-27 20:40:45,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 253 transitions, 2840 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-27 20:40:45,494 INFO L231 Difference]: Finished difference. Result has 188 places, 242 transitions, 2442 flow [2024-06-27 20:40:45,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2308, PETRI_DIFFERENCE_MINUEND_PLACES=181, 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=2442, PETRI_PLACES=188, PETRI_TRANSITIONS=242} [2024-06-27 20:40:45,495 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 147 predicate places. [2024-06-27 20:40:45,495 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 242 transitions, 2442 flow [2024-06-27 20:40:45,495 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 20:40:45,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:45,495 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 20:40:45,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 20:40:45,495 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 20:40:45,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:45,496 INFO L85 PathProgramCache]: Analyzing trace with hash -457659031, now seen corresponding path program 4 times [2024-06-27 20:40:45,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:45,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688472681] [2024-06-27 20:40:45,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:45,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:45,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:45,970 INFO 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 20:40:45,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:45,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688472681] [2024-06-27 20:40:45,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688472681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:45,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:45,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:40:45,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999664167] [2024-06-27 20:40:45,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:45,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:40:45,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:45,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:40:45,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:40:46,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:40:46,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 242 transitions, 2442 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 20:40:46,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:46,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:40:46,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:46,629 INFO L124 PetriNetUnfolderBase]: 2443/3848 cut-off events. [2024-06-27 20:40:46,630 INFO L125 PetriNetUnfolderBase]: For 241901/241911 co-relation queries the response was YES. [2024-06-27 20:40:46,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28050 conditions, 3848 events. 2443/3848 cut-off events. For 241901/241911 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 21290 event pairs, 628 based on Foata normal form. 6/3842 useless extension candidates. Maximal degree in co-relation 27960. Up to 3389 conditions per place. [2024-06-27 20:40:46,668 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 184 selfloop transitions, 83 changer transitions 0/271 dead transitions. [2024-06-27 20:40:46,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 271 transitions, 3718 flow [2024-06-27 20:40:46,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:40:46,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:40:46,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 20:40:46,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-27 20:40:46,670 INFO L175 Difference]: Start difference. First operand has 188 places, 242 transitions, 2442 flow. Second operand 8 states and 132 transitions. [2024-06-27 20:40:46,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 271 transitions, 3718 flow [2024-06-27 20:40:47,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 271 transitions, 3532 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-27 20:40:47,009 INFO L231 Difference]: Finished difference. Result has 189 places, 253 transitions, 2708 flow [2024-06-27 20:40:47,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2256, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2708, PETRI_PLACES=189, PETRI_TRANSITIONS=253} [2024-06-27 20:40:47,010 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 148 predicate places. [2024-06-27 20:40:47,010 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 253 transitions, 2708 flow [2024-06-27 20:40:47,010 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 20:40:47,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:47,010 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 20:40:47,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 20:40:47,010 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 20:40:47,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:47,011 INFO L85 PathProgramCache]: Analyzing trace with hash -457658628, now seen corresponding path program 2 times [2024-06-27 20:40:47,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:47,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058058195] [2024-06-27 20:40:47,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:47,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:47,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:47,654 INFO 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 20:40:47,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:47,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058058195] [2024-06-27 20:40:47,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058058195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:47,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:47,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:40:47,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14642287] [2024-06-27 20:40:47,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:47,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:40:47,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:47,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:40:47,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:40:47,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:40:47,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 253 transitions, 2708 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 20:40:47,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:47,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:40:47,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:48,258 INFO L124 PetriNetUnfolderBase]: 2448/3863 cut-off events. [2024-06-27 20:40:48,259 INFO L125 PetriNetUnfolderBase]: For 252938/252948 co-relation queries the response was YES. [2024-06-27 20:40:48,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28742 conditions, 3863 events. 2448/3863 cut-off events. For 252938/252948 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 21403 event pairs, 616 based on Foata normal form. 9/3868 useless extension candidates. Maximal degree in co-relation 28652. Up to 3684 conditions per place. [2024-06-27 20:40:48,294 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 234 selfloop transitions, 31 changer transitions 0/269 dead transitions. [2024-06-27 20:40:48,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 269 transitions, 3362 flow [2024-06-27 20:40:48,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:40:48,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:40:48,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-27 20:40:48,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 20:40:48,296 INFO L175 Difference]: Start difference. First operand has 189 places, 253 transitions, 2708 flow. Second operand 8 states and 120 transitions. [2024-06-27 20:40:48,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 269 transitions, 3362 flow [2024-06-27 20:40:48,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 269 transitions, 3166 flow, removed 63 selfloop flow, removed 3 redundant places. [2024-06-27 20:40:48,635 INFO L231 Difference]: Finished difference. Result has 194 places, 256 transitions, 2668 flow [2024-06-27 20:40:48,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2512, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2668, PETRI_PLACES=194, PETRI_TRANSITIONS=256} [2024-06-27 20:40:48,636 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 153 predicate places. [2024-06-27 20:40:48,636 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 256 transitions, 2668 flow [2024-06-27 20:40:48,636 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 20:40:48,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:48,636 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 20:40:48,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 20:40:48,637 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 20:40:48,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:48,637 INFO L85 PathProgramCache]: Analyzing trace with hash -457670191, now seen corresponding path program 5 times [2024-06-27 20:40:48,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:48,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297680647] [2024-06-27 20:40:48,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:48,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:48,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:49,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:40:49,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:49,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297680647] [2024-06-27 20:40:49,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297680647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:49,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:49,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:40:49,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695155617] [2024-06-27 20:40:49,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:49,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:40:49,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:49,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:40:49,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:40:49,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:40:49,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 256 transitions, 2668 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 20:40:49,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:49,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:40:49,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:49,733 INFO L124 PetriNetUnfolderBase]: 2458/3869 cut-off events. [2024-06-27 20:40:49,733 INFO L125 PetriNetUnfolderBase]: For 259516/259526 co-relation queries the response was YES. [2024-06-27 20:40:49,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29016 conditions, 3869 events. 2458/3869 cut-off events. For 259516/259526 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 21389 event pairs, 631 based on Foata normal form. 6/3863 useless extension candidates. Maximal degree in co-relation 28924. Up to 3409 conditions per place. [2024-06-27 20:40:49,772 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 182 selfloop transitions, 94 changer transitions 0/280 dead transitions. [2024-06-27 20:40:49,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 280 transitions, 3841 flow [2024-06-27 20:40:49,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:40:49,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:40:49,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 20:40:49,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-27 20:40:49,773 INFO L175 Difference]: Start difference. First operand has 194 places, 256 transitions, 2668 flow. Second operand 8 states and 132 transitions. [2024-06-27 20:40:49,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 280 transitions, 3841 flow [2024-06-27 20:40:50,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 280 transitions, 3707 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 20:40:50,185 INFO L231 Difference]: Finished difference. Result has 197 places, 265 transitions, 2994 flow [2024-06-27 20:40:50,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2534, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2994, PETRI_PLACES=197, PETRI_TRANSITIONS=265} [2024-06-27 20:40:50,186 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 156 predicate places. [2024-06-27 20:40:50,186 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 265 transitions, 2994 flow [2024-06-27 20:40:50,186 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 20:40:50,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:50,186 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 20:40:50,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 20:40:50,186 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 20:40:50,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:50,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1973676136, now seen corresponding path program 3 times [2024-06-27 20:40:50,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:50,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182260134] [2024-06-27 20:40:50,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:50,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:50,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:50,776 INFO 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 20:40:50,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:50,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182260134] [2024-06-27 20:40:50,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182260134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:50,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:50,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:40:50,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278448013] [2024-06-27 20:40:50,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:50,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:40:50,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:50,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:40:50,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:40:50,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:40:50,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 265 transitions, 2994 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 20:40:50,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:50,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:40:50,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:51,465 INFO L124 PetriNetUnfolderBase]: 2463/3877 cut-off events. [2024-06-27 20:40:51,465 INFO L125 PetriNetUnfolderBase]: For 269567/269569 co-relation queries the response was YES. [2024-06-27 20:40:51,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29649 conditions, 3877 events. 2463/3877 cut-off events. For 269567/269569 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 21458 event pairs, 651 based on Foata normal form. 1/3876 useless extension candidates. Maximal degree in co-relation 29555. Up to 3739 conditions per place. [2024-06-27 20:40:51,504 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 258 selfloop transitions, 17 changer transitions 0/279 dead transitions. [2024-06-27 20:40:51,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 279 transitions, 3666 flow [2024-06-27 20:40:51,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:40:51,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:40:51,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 116 transitions. [2024-06-27 20:40:51,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3625 [2024-06-27 20:40:51,505 INFO L175 Difference]: Start difference. First operand has 197 places, 265 transitions, 2994 flow. Second operand 8 states and 116 transitions. [2024-06-27 20:40:51,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 279 transitions, 3666 flow [2024-06-27 20:40:51,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 279 transitions, 3488 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-06-27 20:40:51,939 INFO L231 Difference]: Finished difference. Result has 202 places, 268 transitions, 2954 flow [2024-06-27 20:40:51,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2818, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2954, PETRI_PLACES=202, PETRI_TRANSITIONS=268} [2024-06-27 20:40:51,939 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 161 predicate places. [2024-06-27 20:40:51,939 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 268 transitions, 2954 flow [2024-06-27 20:40:51,940 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 20:40:51,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:51,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:40:51,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 20:40:51,940 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 20:40:51,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:51,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1760963520, now seen corresponding path program 4 times [2024-06-27 20:40:51,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:51,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854349780] [2024-06-27 20:40:51,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:51,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:51,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:52,570 INFO 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 20:40:52,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:52,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854349780] [2024-06-27 20:40:52,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854349780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:52,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:52,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:40:52,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283958260] [2024-06-27 20:40:52,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:52,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:40:52,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:52,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:40:52,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:40:52,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:40:52,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 268 transitions, 2954 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 20:40:52,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:52,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:40:52,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:53,284 INFO L124 PetriNetUnfolderBase]: 2460/3873 cut-off events. [2024-06-27 20:40:53,284 INFO L125 PetriNetUnfolderBase]: For 273521/273523 co-relation queries the response was YES. [2024-06-27 20:40:53,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29657 conditions, 3873 events. 2460/3873 cut-off events. For 273521/273523 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 21423 event pairs, 655 based on Foata normal form. 1/3872 useless extension candidates. Maximal degree in co-relation 29561. Up to 3729 conditions per place. [2024-06-27 20:40:53,321 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 256 selfloop transitions, 23 changer transitions 0/283 dead transitions. [2024-06-27 20:40:53,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 283 transitions, 3640 flow [2024-06-27 20:40:53,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:40:53,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:40:53,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 128 transitions. [2024-06-27 20:40:53,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35555555555555557 [2024-06-27 20:40:53,322 INFO L175 Difference]: Start difference. First operand has 202 places, 268 transitions, 2954 flow. Second operand 9 states and 128 transitions. [2024-06-27 20:40:53,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 283 transitions, 3640 flow [2024-06-27 20:40:53,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 283 transitions, 3526 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-27 20:40:53,825 INFO L231 Difference]: Finished difference. Result has 205 places, 271 transitions, 2998 flow [2024-06-27 20:40:53,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2840, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2998, PETRI_PLACES=205, PETRI_TRANSITIONS=271} [2024-06-27 20:40:53,826 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-27 20:40:53,826 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 271 transitions, 2998 flow [2024-06-27 20:40:53,826 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 20:40:53,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:53,827 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 20:40:53,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 20:40:53,827 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 20:40:53,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:53,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1961163513, now seen corresponding path program 6 times [2024-06-27 20:40:53,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:53,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788478151] [2024-06-27 20:40:53,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:53,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:53,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:54,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:40:54,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:54,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788478151] [2024-06-27 20:40:54,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788478151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:54,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:54,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:40:54,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971507312] [2024-06-27 20:40:54,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:54,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:40:54,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:54,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:40:54,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:40:54,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:40:54,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 271 transitions, 2998 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 20:40:54,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:54,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:40:54,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:55,133 INFO L124 PetriNetUnfolderBase]: 2456/3870 cut-off events. [2024-06-27 20:40:55,133 INFO L125 PetriNetUnfolderBase]: For 279875/279883 co-relation queries the response was YES. [2024-06-27 20:40:55,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29771 conditions, 3870 events. 2456/3870 cut-off events. For 279875/279883 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 21428 event pairs, 657 based on Foata normal form. 6/3873 useless extension candidates. Maximal degree in co-relation 29674. Up to 3691 conditions per place. [2024-06-27 20:40:55,173 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 246 selfloop transitions, 33 changer transitions 0/283 dead transitions. [2024-06-27 20:40:55,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 283 transitions, 3710 flow [2024-06-27 20:40:55,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:40:55,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:40:55,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-27 20:40:55,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.384375 [2024-06-27 20:40:55,174 INFO L175 Difference]: Start difference. First operand has 205 places, 271 transitions, 2998 flow. Second operand 8 states and 123 transitions. [2024-06-27 20:40:55,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 283 transitions, 3710 flow [2024-06-27 20:40:55,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 283 transitions, 3510 flow, removed 81 selfloop flow, removed 7 redundant places. [2024-06-27 20:40:55,679 INFO L231 Difference]: Finished difference. Result has 206 places, 271 transitions, 2874 flow [2024-06-27 20:40:55,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2800, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2874, PETRI_PLACES=206, PETRI_TRANSITIONS=271} [2024-06-27 20:40:55,679 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 165 predicate places. [2024-06-27 20:40:55,680 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 271 transitions, 2874 flow [2024-06-27 20:40:55,680 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 20:40:55,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:55,680 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 20:40:55,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 20:40:55,680 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 20:40:55,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:55,681 INFO L85 PathProgramCache]: Analyzing trace with hash -444485380, now seen corresponding path program 1 times [2024-06-27 20:40:55,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:55,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550479836] [2024-06-27 20:40:55,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:55,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:55,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:56,388 INFO 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 20:40:56,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:56,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550479836] [2024-06-27 20:40:56,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550479836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:56,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:56,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:40:56,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090087946] [2024-06-27 20:40:56,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:56,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:40:56,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:56,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:40:56,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:40:56,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:40:56,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 271 transitions, 2874 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 20:40:56,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:56,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:40:56,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:57,142 INFO L124 PetriNetUnfolderBase]: 2346/3753 cut-off events. [2024-06-27 20:40:57,142 INFO L125 PetriNetUnfolderBase]: For 278102/278104 co-relation queries the response was YES. [2024-06-27 20:40:57,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28771 conditions, 3753 events. 2346/3753 cut-off events. For 278102/278104 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 21165 event pairs, 611 based on Foata normal form. 2/3749 useless extension candidates. Maximal degree in co-relation 28673. Up to 3476 conditions per place. [2024-06-27 20:40:57,177 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 253 selfloop transitions, 19 changer transitions 0/291 dead transitions. [2024-06-27 20:40:57,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 291 transitions, 3526 flow [2024-06-27 20:40:57,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:40:57,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:40:57,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 20:40:57,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-27 20:40:57,179 INFO L175 Difference]: Start difference. First operand has 206 places, 271 transitions, 2874 flow. Second operand 7 states and 118 transitions. [2024-06-27 20:40:57,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 291 transitions, 3526 flow [2024-06-27 20:40:57,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 291 transitions, 3313 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-27 20:40:57,638 INFO L231 Difference]: Finished difference. Result has 204 places, 274 transitions, 2771 flow [2024-06-27 20:40:57,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2661, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2771, PETRI_PLACES=204, PETRI_TRANSITIONS=274} [2024-06-27 20:40:57,639 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 163 predicate places. [2024-06-27 20:40:57,639 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 274 transitions, 2771 flow [2024-06-27 20:40:57,639 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 20:40:57,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:57,639 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 20:40:57,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 20:40:57,640 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 20:40:57,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:57,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1648048580, now seen corresponding path program 1 times [2024-06-27 20:40:57,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:57,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137733424] [2024-06-27 20:40:57,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:57,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:57,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:58,259 INFO 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 20:40:58,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:58,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137733424] [2024-06-27 20:40:58,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137733424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:58,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:58,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:40:58,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361282290] [2024-06-27 20:40:58,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:58,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:40:58,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:58,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:40:58,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:40:58,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:40:58,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 274 transitions, 2771 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 20:40:58,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:58,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:40:58,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:58,944 INFO L124 PetriNetUnfolderBase]: 2443/3851 cut-off events. [2024-06-27 20:40:58,945 INFO L125 PetriNetUnfolderBase]: For 279485/279487 co-relation queries the response was YES. [2024-06-27 20:40:58,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29065 conditions, 3851 events. 2443/3851 cut-off events. For 279485/279487 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 21318 event pairs, 646 based on Foata normal form. 1/3850 useless extension candidates. Maximal degree in co-relation 28969. Up to 3706 conditions per place. [2024-06-27 20:40:58,983 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 269 selfloop transitions, 17 changer transitions 0/290 dead transitions. [2024-06-27 20:40:58,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 290 transitions, 3413 flow [2024-06-27 20:40:58,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:40:58,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:40:58,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-27 20:40:58,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.371875 [2024-06-27 20:40:58,984 INFO L175 Difference]: Start difference. First operand has 204 places, 274 transitions, 2771 flow. Second operand 8 states and 119 transitions. [2024-06-27 20:40:58,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 290 transitions, 3413 flow [2024-06-27 20:40:59,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 290 transitions, 3345 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 20:40:59,481 INFO L231 Difference]: Finished difference. Result has 207 places, 276 transitions, 2777 flow [2024-06-27 20:40:59,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2703, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2777, PETRI_PLACES=207, PETRI_TRANSITIONS=276} [2024-06-27 20:40:59,481 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 166 predicate places. [2024-06-27 20:40:59,481 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 276 transitions, 2777 flow [2024-06-27 20:40:59,482 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 20:40:59,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:59,482 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 20:40:59,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 20:40:59,482 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 20:40:59,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:59,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1974127558, now seen corresponding path program 2 times [2024-06-27 20:40:59,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:59,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184078020] [2024-06-27 20:40:59,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:59,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:59,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:00,102 INFO 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 20:41:00,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:00,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184078020] [2024-06-27 20:41:00,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184078020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:00,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:00,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:41:00,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223511600] [2024-06-27 20:41:00,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:00,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:41:00,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:00,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:41:00,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:41:00,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:41:00,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 276 transitions, 2777 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 20:41:00,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:00,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:41:00,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:00,815 INFO L124 PetriNetUnfolderBase]: 2453/3866 cut-off events. [2024-06-27 20:41:00,816 INFO L125 PetriNetUnfolderBase]: For 288113/288121 co-relation queries the response was YES. [2024-06-27 20:41:00,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29240 conditions, 3866 events. 2453/3866 cut-off events. For 288113/288121 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 21398 event pairs, 652 based on Foata normal form. 5/3868 useless extension candidates. Maximal degree in co-relation 29143. Up to 3693 conditions per place. [2024-06-27 20:41:00,850 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 254 selfloop transitions, 39 changer transitions 0/297 dead transitions. [2024-06-27 20:41:00,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 297 transitions, 3624 flow [2024-06-27 20:41:00,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:41:00,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:41:00,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 133 transitions. [2024-06-27 20:41:00,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36944444444444446 [2024-06-27 20:41:00,852 INFO L175 Difference]: Start difference. First operand has 207 places, 276 transitions, 2777 flow. Second operand 9 states and 133 transitions. [2024-06-27 20:41:00,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 297 transitions, 3624 flow [2024-06-27 20:41:01,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 297 transitions, 3550 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 20:41:01,430 INFO L231 Difference]: Finished difference. Result has 210 places, 284 transitions, 2893 flow [2024-06-27 20:41:01,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2703, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2893, PETRI_PLACES=210, PETRI_TRANSITIONS=284} [2024-06-27 20:41:01,430 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 169 predicate places. [2024-06-27 20:41:01,431 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 284 transitions, 2893 flow [2024-06-27 20:41:01,431 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 20:41:01,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:01,431 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 20:41:01,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 20:41:01,431 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 20:41:01,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:01,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1966508998, now seen corresponding path program 3 times [2024-06-27 20:41:01,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:01,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839361304] [2024-06-27 20:41:01,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:01,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:01,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:02,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:02,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:02,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839361304] [2024-06-27 20:41:02,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839361304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:02,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:02,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:41:02,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462862632] [2024-06-27 20:41:02,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:02,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:41:02,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:02,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:41:02,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:41:02,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:41:02,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 284 transitions, 2893 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 20:41:02,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:02,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:41:02,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:02,894 INFO L124 PetriNetUnfolderBase]: 2466/3885 cut-off events. [2024-06-27 20:41:02,894 INFO L125 PetriNetUnfolderBase]: For 298932/298937 co-relation queries the response was YES. [2024-06-27 20:41:02,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29428 conditions, 3885 events. 2466/3885 cut-off events. For 298932/298937 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 21488 event pairs, 656 based on Foata normal form. 3/3884 useless extension candidates. Maximal degree in co-relation 29330. Up to 3639 conditions per place. [2024-06-27 20:41:02,938 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 260 selfloop transitions, 47 changer transitions 0/311 dead transitions. [2024-06-27 20:41:02,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 311 transitions, 3646 flow [2024-06-27 20:41:02,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:41:02,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:41:02,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 20:41:02,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-27 20:41:02,939 INFO L175 Difference]: Start difference. First operand has 210 places, 284 transitions, 2893 flow. Second operand 8 states and 130 transitions. [2024-06-27 20:41:02,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 311 transitions, 3646 flow [2024-06-27 20:41:03,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 311 transitions, 3562 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-27 20:41:03,569 INFO L231 Difference]: Finished difference. Result has 216 places, 295 transitions, 3045 flow [2024-06-27 20:41:03,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2809, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3045, PETRI_PLACES=216, PETRI_TRANSITIONS=295} [2024-06-27 20:41:03,569 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 175 predicate places. [2024-06-27 20:41:03,569 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 295 transitions, 3045 flow [2024-06-27 20:41:03,569 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 20:41:03,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:03,570 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 20:41:03,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 20:41:03,570 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 20:41:03,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:03,570 INFO L85 PathProgramCache]: Analyzing trace with hash 74054210, now seen corresponding path program 1 times [2024-06-27 20:41:03,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:03,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099319945] [2024-06-27 20:41:03,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:03,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:03,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:04,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:04,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:04,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099319945] [2024-06-27 20:41:04,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099319945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:04,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:04,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:41:04,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351920527] [2024-06-27 20:41:04,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:04,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:41:04,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:04,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:41:04,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:41:04,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:41:04,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 295 transitions, 3045 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 20:41:04,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:04,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:41:04,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:04,905 INFO L124 PetriNetUnfolderBase]: 2482/3911 cut-off events. [2024-06-27 20:41:04,905 INFO L125 PetriNetUnfolderBase]: For 307594/307604 co-relation queries the response was YES. [2024-06-27 20:41:04,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30082 conditions, 3911 events. 2482/3911 cut-off events. For 307594/307604 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 21617 event pairs, 462 based on Foata normal form. 12/3920 useless extension candidates. Maximal degree in co-relation 29980. Up to 3570 conditions per place. [2024-06-27 20:41:04,939 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 286 selfloop transitions, 37 changer transitions 0/327 dead transitions. [2024-06-27 20:41:04,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 327 transitions, 3867 flow [2024-06-27 20:41:04,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:41:04,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:41:04,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 20:41:04,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-27 20:41:04,941 INFO L175 Difference]: Start difference. First operand has 216 places, 295 transitions, 3045 flow. Second operand 8 states and 137 transitions. [2024-06-27 20:41:04,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 327 transitions, 3867 flow [2024-06-27 20:41:05,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 327 transitions, 3825 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-27 20:41:05,470 INFO L231 Difference]: Finished difference. Result has 222 places, 298 transitions, 3171 flow [2024-06-27 20:41:05,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3003, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3171, PETRI_PLACES=222, PETRI_TRANSITIONS=298} [2024-06-27 20:41:05,471 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 181 predicate places. [2024-06-27 20:41:05,471 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 298 transitions, 3171 flow [2024-06-27 20:41:05,471 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 20:41:05,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:05,472 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 20:41:05,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 20:41:05,472 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 20:41:05,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:05,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1560831382, now seen corresponding path program 2 times [2024-06-27 20:41:05,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:05,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876899626] [2024-06-27 20:41:05,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:05,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:05,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:05,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:05,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:05,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876899626] [2024-06-27 20:41:05,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876899626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:05,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:05,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:41:05,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256539561] [2024-06-27 20:41:05,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:05,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:41:05,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:05,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:41:05,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:41:06,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:41:06,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 298 transitions, 3171 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 20:41:06,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:06,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:41:06,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:06,797 INFO L124 PetriNetUnfolderBase]: 2498/3935 cut-off events. [2024-06-27 20:41:06,797 INFO L125 PetriNetUnfolderBase]: For 317764/317774 co-relation queries the response was YES. [2024-06-27 20:41:06,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30812 conditions, 3935 events. 2498/3935 cut-off events. For 317764/317774 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 21806 event pairs, 598 based on Foata normal form. 12/3944 useless extension candidates. Maximal degree in co-relation 30708. Up to 3647 conditions per place. [2024-06-27 20:41:06,836 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 284 selfloop transitions, 38 changer transitions 0/326 dead transitions. [2024-06-27 20:41:06,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 326 transitions, 3985 flow [2024-06-27 20:41:06,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:41:06,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:41:06,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 20:41:06,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-27 20:41:06,837 INFO L175 Difference]: Start difference. First operand has 222 places, 298 transitions, 3171 flow. Second operand 8 states and 134 transitions. [2024-06-27 20:41:06,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 326 transitions, 3985 flow [2024-06-27 20:41:07,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 326 transitions, 3839 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 20:41:07,667 INFO L231 Difference]: Finished difference. Result has 224 places, 301 transitions, 3201 flow [2024-06-27 20:41:07,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3025, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3201, PETRI_PLACES=224, PETRI_TRANSITIONS=301} [2024-06-27 20:41:07,668 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 183 predicate places. [2024-06-27 20:41:07,668 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 301 transitions, 3201 flow [2024-06-27 20:41:07,668 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 20:41:07,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:07,669 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 20:41:07,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 20:41:07,669 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 20:41:07,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:07,669 INFO L85 PathProgramCache]: Analyzing trace with hash -593205794, now seen corresponding path program 1 times [2024-06-27 20:41:07,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:07,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647040657] [2024-06-27 20:41:07,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:07,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:07,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:08,340 INFO 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 20:41:08,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:08,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647040657] [2024-06-27 20:41:08,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647040657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:08,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:08,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:41:08,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481130077] [2024-06-27 20:41:08,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:08,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:41:08,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:08,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:41:08,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:41:08,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:41:08,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 301 transitions, 3201 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 20:41:08,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:08,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:41:08,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:09,203 INFO L124 PetriNetUnfolderBase]: 2554/4019 cut-off events. [2024-06-27 20:41:09,203 INFO L125 PetriNetUnfolderBase]: For 334941/334948 co-relation queries the response was YES. [2024-06-27 20:41:09,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31834 conditions, 4019 events. 2554/4019 cut-off events. For 334941/334948 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 22255 event pairs, 541 based on Foata normal form. 8/4023 useless extension candidates. Maximal degree in co-relation 31729. Up to 3358 conditions per place. [2024-06-27 20:41:09,249 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 252 selfloop transitions, 87 changer transitions 0/343 dead transitions. [2024-06-27 20:41:09,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 343 transitions, 4459 flow [2024-06-27 20:41:09,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:41:09,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:41:09,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 20:41:09,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-27 20:41:09,250 INFO L175 Difference]: Start difference. First operand has 224 places, 301 transitions, 3201 flow. Second operand 9 states and 161 transitions. [2024-06-27 20:41:09,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 343 transitions, 4459 flow [2024-06-27 20:41:09,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 343 transitions, 4305 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-27 20:41:09,895 INFO L231 Difference]: Finished difference. Result has 229 places, 312 transitions, 3478 flow [2024-06-27 20:41:09,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3047, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3478, PETRI_PLACES=229, PETRI_TRANSITIONS=312} [2024-06-27 20:41:09,896 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 188 predicate places. [2024-06-27 20:41:09,896 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 312 transitions, 3478 flow [2024-06-27 20:41:09,896 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 20:41:09,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:09,896 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 20:41:09,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 20:41:09,896 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 20:41:09,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:09,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1670590354, now seen corresponding path program 1 times [2024-06-27 20:41:09,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:09,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55940167] [2024-06-27 20:41:09,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:09,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:09,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:10,412 INFO 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 20:41:10,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:10,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55940167] [2024-06-27 20:41:10,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55940167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:10,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:10,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:41:10,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118786944] [2024-06-27 20:41:10,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:10,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:41:10,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:10,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:41:10,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:41:10,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:41:10,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 312 transitions, 3478 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 20:41:10,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:10,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:41:10,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:11,301 INFO L124 PetriNetUnfolderBase]: 2574/4032 cut-off events. [2024-06-27 20:41:11,301 INFO L125 PetriNetUnfolderBase]: For 348031/348036 co-relation queries the response was YES. [2024-06-27 20:41:11,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32993 conditions, 4032 events. 2574/4032 cut-off events. For 348031/348036 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 22272 event pairs, 548 based on Foata normal form. 4/4032 useless extension candidates. Maximal degree in co-relation 32885. Up to 3447 conditions per place. [2024-06-27 20:41:11,345 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 264 selfloop transitions, 83 changer transitions 0/351 dead transitions. [2024-06-27 20:41:11,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 351 transitions, 4434 flow [2024-06-27 20:41:11,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:41:11,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:41:11,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 20:41:11,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 20:41:11,347 INFO L175 Difference]: Start difference. First operand has 229 places, 312 transitions, 3478 flow. Second operand 8 states and 140 transitions. [2024-06-27 20:41:11,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 351 transitions, 4434 flow [2024-06-27 20:41:12,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 351 transitions, 4211 flow, removed 64 selfloop flow, removed 4 redundant places. [2024-06-27 20:41:12,174 INFO L231 Difference]: Finished difference. Result has 234 places, 325 transitions, 3627 flow [2024-06-27 20:41:12,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3265, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3627, PETRI_PLACES=234, PETRI_TRANSITIONS=325} [2024-06-27 20:41:12,175 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 193 predicate places. [2024-06-27 20:41:12,175 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 325 transitions, 3627 flow [2024-06-27 20:41:12,175 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 20:41:12,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:12,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:12,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 20:41:12,176 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 20:41:12,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:12,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1369754718, now seen corresponding path program 2 times [2024-06-27 20:41:12,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:12,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526427843] [2024-06-27 20:41:12,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:12,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:12,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:12,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:12,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:12,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526427843] [2024-06-27 20:41:12,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526427843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:12,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:12,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:41:12,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753628003] [2024-06-27 20:41:12,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:12,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:41:12,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:12,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:41:12,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:41:12,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:41:12,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 325 transitions, 3627 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 20:41:12,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:12,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:41:12,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:13,532 INFO L124 PetriNetUnfolderBase]: 2610/4084 cut-off events. [2024-06-27 20:41:13,532 INFO L125 PetriNetUnfolderBase]: For 365311/365316 co-relation queries the response was YES. [2024-06-27 20:41:13,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34557 conditions, 4084 events. 2610/4084 cut-off events. For 365311/365316 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 22569 event pairs, 554 based on Foata normal form. 4/4084 useless extension candidates. Maximal degree in co-relation 34446. Up to 3455 conditions per place. [2024-06-27 20:41:13,577 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 261 selfloop transitions, 92 changer transitions 0/357 dead transitions. [2024-06-27 20:41:13,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 357 transitions, 4737 flow [2024-06-27 20:41:13,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:41:13,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:41:13,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 20:41:13,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-27 20:41:13,580 INFO L175 Difference]: Start difference. First operand has 234 places, 325 transitions, 3627 flow. Second operand 8 states and 141 transitions. [2024-06-27 20:41:13,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 357 transitions, 4737 flow [2024-06-27 20:41:14,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 357 transitions, 4537 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-27 20:41:14,479 INFO L231 Difference]: Finished difference. Result has 238 places, 333 transitions, 3810 flow [2024-06-27 20:41:14,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3427, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3810, PETRI_PLACES=238, PETRI_TRANSITIONS=333} [2024-06-27 20:41:14,480 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 197 predicate places. [2024-06-27 20:41:14,480 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 333 transitions, 3810 flow [2024-06-27 20:41:14,480 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 20:41:14,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:14,481 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 20:41:14,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 20:41:14,481 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 20:41:14,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:14,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1402636980, now seen corresponding path program 1 times [2024-06-27 20:41:14,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:14,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425517146] [2024-06-27 20:41:14,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:14,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:14,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:14,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:14,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:14,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425517146] [2024-06-27 20:41:14,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425517146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:14,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:14,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:41:14,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995880221] [2024-06-27 20:41:14,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:14,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:41:14,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:14,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:41:14,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:41:14,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:41:14,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 333 transitions, 3810 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 20:41:14,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:14,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:41:14,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:15,809 INFO L124 PetriNetUnfolderBase]: 2620/4092 cut-off events. [2024-06-27 20:41:15,809 INFO L125 PetriNetUnfolderBase]: For 373613/373621 co-relation queries the response was YES. [2024-06-27 20:41:15,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35184 conditions, 4092 events. 2620/4092 cut-off events. For 373613/373621 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 22555 event pairs, 565 based on Foata normal form. 6/4095 useless extension candidates. Maximal degree in co-relation 35072. Up to 3819 conditions per place. [2024-06-27 20:41:15,853 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 315 selfloop transitions, 39 changer transitions 0/358 dead transitions. [2024-06-27 20:41:15,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 358 transitions, 4673 flow [2024-06-27 20:41:15,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:41:15,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:41:15,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 20:41:15,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409375 [2024-06-27 20:41:15,854 INFO L175 Difference]: Start difference. First operand has 238 places, 333 transitions, 3810 flow. Second operand 8 states and 131 transitions. [2024-06-27 20:41:15,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 358 transitions, 4673 flow [2024-06-27 20:41:16,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 358 transitions, 4413 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-27 20:41:16,546 INFO L231 Difference]: Finished difference. Result has 241 places, 337 transitions, 3730 flow [2024-06-27 20:41:16,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3550, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3730, PETRI_PLACES=241, PETRI_TRANSITIONS=337} [2024-06-27 20:41:16,547 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 200 predicate places. [2024-06-27 20:41:16,547 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 337 transitions, 3730 flow [2024-06-27 20:41:16,547 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 20:41:16,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:16,547 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 20:41:16,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 20:41:16,547 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 20:41:16,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:16,548 INFO L85 PathProgramCache]: Analyzing trace with hash -369737962, now seen corresponding path program 2 times [2024-06-27 20:41:16,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:16,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345322911] [2024-06-27 20:41:16,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:16,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:16,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:17,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:17,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:17,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345322911] [2024-06-27 20:41:17,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345322911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:17,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:17,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:41:17,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062782764] [2024-06-27 20:41:17,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:17,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:41:17,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:17,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:41:17,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:41:17,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:41:17,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 337 transitions, 3730 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 20:41:17,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:17,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:41:17,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:17,970 INFO L124 PetriNetUnfolderBase]: 2630/4105 cut-off events. [2024-06-27 20:41:17,971 INFO L125 PetriNetUnfolderBase]: For 380764/380772 co-relation queries the response was YES. [2024-06-27 20:41:17,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35016 conditions, 4105 events. 2630/4105 cut-off events. For 380764/380772 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 22576 event pairs, 566 based on Foata normal form. 6/4108 useless extension candidates. Maximal degree in co-relation 34903. Up to 3749 conditions per place. [2024-06-27 20:41:18,011 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 291 selfloop transitions, 64 changer transitions 0/359 dead transitions. [2024-06-27 20:41:18,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 359 transitions, 4731 flow [2024-06-27 20:41:18,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:41:18,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:41:18,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 20:41:18,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409375 [2024-06-27 20:41:18,013 INFO L175 Difference]: Start difference. First operand has 241 places, 337 transitions, 3730 flow. Second operand 8 states and 131 transitions. [2024-06-27 20:41:18,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 359 transitions, 4731 flow [2024-06-27 20:41:18,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 359 transitions, 4602 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 20:41:18,600 INFO L231 Difference]: Finished difference. Result has 243 places, 341 transitions, 3836 flow [2024-06-27 20:41:18,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3601, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3836, PETRI_PLACES=243, PETRI_TRANSITIONS=341} [2024-06-27 20:41:18,601 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 202 predicate places. [2024-06-27 20:41:18,601 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 341 transitions, 3836 flow [2024-06-27 20:41:18,601 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 20:41:18,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:18,601 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 20:41:18,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 20:41:18,602 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 20:41:18,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:18,602 INFO L85 PathProgramCache]: Analyzing trace with hash -369975298, now seen corresponding path program 3 times [2024-06-27 20:41:18,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:18,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035590757] [2024-06-27 20:41:18,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:18,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:18,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:19,122 INFO 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 20:41:19,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:19,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035590757] [2024-06-27 20:41:19,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035590757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:19,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:19,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:41:19,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690343753] [2024-06-27 20:41:19,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:19,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:41:19,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:19,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:41:19,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:41:19,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:41:19,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 341 transitions, 3836 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 20:41:19,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:19,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:41:19,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:20,023 INFO L124 PetriNetUnfolderBase]: 2682/4190 cut-off events. [2024-06-27 20:41:20,023 INFO L125 PetriNetUnfolderBase]: For 407117/407122 co-relation queries the response was YES. [2024-06-27 20:41:20,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36167 conditions, 4190 events. 2682/4190 cut-off events. For 407117/407122 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 23158 event pairs, 578 based on Foata normal form. 4/4190 useless extension candidates. Maximal degree in co-relation 36053. Up to 3417 conditions per place. [2024-06-27 20:41:20,073 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 265 selfloop transitions, 100 changer transitions 0/369 dead transitions. [2024-06-27 20:41:20,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 369 transitions, 4972 flow [2024-06-27 20:41:20,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:41:20,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:41:20,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 20:41:20,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-27 20:41:20,074 INFO L175 Difference]: Start difference. First operand has 243 places, 341 transitions, 3836 flow. Second operand 8 states and 137 transitions. [2024-06-27 20:41:20,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 369 transitions, 4972 flow [2024-06-27 20:41:21,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 369 transitions, 4815 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-27 20:41:21,121 INFO L231 Difference]: Finished difference. Result has 246 places, 348 transitions, 4050 flow [2024-06-27 20:41:21,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3679, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4050, PETRI_PLACES=246, PETRI_TRANSITIONS=348} [2024-06-27 20:41:21,121 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 205 predicate places. [2024-06-27 20:41:21,121 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 348 transitions, 4050 flow [2024-06-27 20:41:21,122 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 20:41:21,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:21,122 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 20:41:21,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 20:41:21,122 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 20:41:21,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:21,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1847842030, now seen corresponding path program 3 times [2024-06-27 20:41:21,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:21,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209537001] [2024-06-27 20:41:21,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:21,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:21,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:21,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:21,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:21,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209537001] [2024-06-27 20:41:21,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209537001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:21,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:21,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:41:21,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747969985] [2024-06-27 20:41:21,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:21,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:41:21,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:21,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:41:21,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:41:21,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:41:21,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 348 transitions, 4050 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 20:41:21,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:21,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:41:21,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:22,462 INFO L124 PetriNetUnfolderBase]: 2684/4190 cut-off events. [2024-06-27 20:41:22,463 INFO L125 PetriNetUnfolderBase]: For 413569/413577 co-relation queries the response was YES. [2024-06-27 20:41:22,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36896 conditions, 4190 events. 2684/4190 cut-off events. For 413569/413577 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 23155 event pairs, 570 based on Foata normal form. 6/4193 useless extension candidates. Maximal degree in co-relation 36781. Up to 3822 conditions per place. [2024-06-27 20:41:22,510 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 299 selfloop transitions, 66 changer transitions 0/369 dead transitions. [2024-06-27 20:41:22,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 369 transitions, 5065 flow [2024-06-27 20:41:22,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:41:22,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:41:22,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 20:41:22,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-27 20:41:22,511 INFO L175 Difference]: Start difference. First operand has 246 places, 348 transitions, 4050 flow. Second operand 8 states and 132 transitions. [2024-06-27 20:41:22,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 369 transitions, 5065 flow [2024-06-27 20:41:23,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 369 transitions, 4885 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-27 20:41:23,496 INFO L231 Difference]: Finished difference. Result has 250 places, 351 transitions, 4096 flow [2024-06-27 20:41:23,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3870, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4096, PETRI_PLACES=250, PETRI_TRANSITIONS=351} [2024-06-27 20:41:23,496 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 209 predicate places. [2024-06-27 20:41:23,497 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 351 transitions, 4096 flow [2024-06-27 20:41:23,497 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 20:41:23,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:23,497 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 20:41:23,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 20:41:23,497 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 20:41:23,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:23,498 INFO L85 PathProgramCache]: Analyzing trace with hash -370098430, now seen corresponding path program 3 times [2024-06-27 20:41:23,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:23,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157893628] [2024-06-27 20:41:23,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:23,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:23,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:24,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:24,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:24,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157893628] [2024-06-27 20:41:24,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157893628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:24,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:24,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:41:24,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345473110] [2024-06-27 20:41:24,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:24,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:41:24,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:24,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:41:24,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:41:24,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:41:24,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 351 transitions, 4096 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 20:41:24,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:24,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:41:24,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:24,853 INFO L124 PetriNetUnfolderBase]: 2700/4212 cut-off events. [2024-06-27 20:41:24,853 INFO L125 PetriNetUnfolderBase]: For 428667/428675 co-relation queries the response was YES. [2024-06-27 20:41:24,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37232 conditions, 4212 events. 2700/4212 cut-off events. For 428667/428675 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 23274 event pairs, 570 based on Foata normal form. 8/4217 useless extension candidates. Maximal degree in co-relation 37115. Up to 3888 conditions per place. [2024-06-27 20:41:24,900 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 320 selfloop transitions, 48 changer transitions 0/372 dead transitions. [2024-06-27 20:41:24,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 372 transitions, 4990 flow [2024-06-27 20:41:24,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:41:24,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:41:24,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 20:41:24,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403125 [2024-06-27 20:41:24,902 INFO L175 Difference]: Start difference. First operand has 250 places, 351 transitions, 4096 flow. Second operand 8 states and 129 transitions. [2024-06-27 20:41:24,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 372 transitions, 4990 flow [2024-06-27 20:41:25,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 372 transitions, 4838 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-27 20:41:25,750 INFO L231 Difference]: Finished difference. Result has 253 places, 354 transitions, 4156 flow [2024-06-27 20:41:25,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3944, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4156, PETRI_PLACES=253, PETRI_TRANSITIONS=354} [2024-06-27 20:41:25,751 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 212 predicate places. [2024-06-27 20:41:25,751 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 354 transitions, 4156 flow [2024-06-27 20:41:25,751 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 20:41:25,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:25,751 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 20:41:25,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 20:41:25,752 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 20:41:25,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:25,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1848075584, now seen corresponding path program 2 times [2024-06-27 20:41:25,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:25,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092823233] [2024-06-27 20:41:25,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:25,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:25,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:26,428 INFO 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 20:41:26,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:26,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092823233] [2024-06-27 20:41:26,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092823233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:26,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:26,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:41:26,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921152123] [2024-06-27 20:41:26,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:26,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:41:26,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:26,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:41:26,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:41:26,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:41:26,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 354 transitions, 4156 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 20:41:26,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:26,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:41:26,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:27,279 INFO L124 PetriNetUnfolderBase]: 2712/4231 cut-off events. [2024-06-27 20:41:27,279 INFO L125 PetriNetUnfolderBase]: For 435062/435070 co-relation queries the response was YES. [2024-06-27 20:41:27,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37680 conditions, 4231 events. 2712/4231 cut-off events. For 435062/435070 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 23390 event pairs, 570 based on Foata normal form. 6/4234 useless extension candidates. Maximal degree in co-relation 37562. Up to 3856 conditions per place. [2024-06-27 20:41:27,328 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 302 selfloop transitions, 71 changer transitions 0/377 dead transitions. [2024-06-27 20:41:27,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 377 transitions, 5234 flow [2024-06-27 20:41:27,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:41:27,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:41:27,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-27 20:41:27,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 20:41:27,329 INFO L175 Difference]: Start difference. First operand has 253 places, 354 transitions, 4156 flow. Second operand 9 states and 144 transitions. [2024-06-27 20:41:27,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 377 transitions, 5234 flow [2024-06-27 20:41:28,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 377 transitions, 5044 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-27 20:41:28,140 INFO L231 Difference]: Finished difference. Result has 256 places, 358 transitions, 4249 flow [2024-06-27 20:41:28,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3966, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4249, PETRI_PLACES=256, PETRI_TRANSITIONS=358} [2024-06-27 20:41:28,140 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 215 predicate places. [2024-06-27 20:41:28,140 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 358 transitions, 4249 flow [2024-06-27 20:41:28,141 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 20:41:28,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:28,141 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 20:41:28,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 20:41:28,141 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 20:41:28,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:28,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1848088108, now seen corresponding path program 1 times [2024-06-27 20:41:28,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:28,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632611260] [2024-06-27 20:41:28,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:28,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:28,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:28,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:28,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:28,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632611260] [2024-06-27 20:41:28,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632611260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:28,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:28,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:41:28,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863938502] [2024-06-27 20:41:28,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:28,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:41:28,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:28,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:41:28,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:41:28,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:41:28,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 358 transitions, 4249 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 20:41:28,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:28,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:41:28,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:29,847 INFO L124 PetriNetUnfolderBase]: 2720/4246 cut-off events. [2024-06-27 20:41:29,847 INFO L125 PetriNetUnfolderBase]: For 446720/446724 co-relation queries the response was YES. [2024-06-27 20:41:29,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38224 conditions, 4246 events. 2720/4246 cut-off events. For 446720/446724 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 23489 event pairs, 583 based on Foata normal form. 6/4250 useless extension candidates. Maximal degree in co-relation 38105. Up to 4079 conditions per place. [2024-06-27 20:41:29,896 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 355 selfloop transitions, 21 changer transitions 0/380 dead transitions. [2024-06-27 20:41:29,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 380 transitions, 5161 flow [2024-06-27 20:41:29,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:41:29,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:41:29,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-27 20:41:29,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37222222222222223 [2024-06-27 20:41:29,897 INFO L175 Difference]: Start difference. First operand has 256 places, 358 transitions, 4249 flow. Second operand 9 states and 134 transitions. [2024-06-27 20:41:29,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 380 transitions, 5161 flow [2024-06-27 20:41:30,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 380 transitions, 4906 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-27 20:41:30,733 INFO L231 Difference]: Finished difference. Result has 258 places, 360 transitions, 4143 flow [2024-06-27 20:41:30,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3994, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4143, PETRI_PLACES=258, PETRI_TRANSITIONS=360} [2024-06-27 20:41:30,734 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 217 predicate places. [2024-06-27 20:41:30,734 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 360 transitions, 4143 flow [2024-06-27 20:41:30,734 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 20:41:30,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:30,734 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 20:41:30,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 20:41:30,735 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 20:41:30,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:30,735 INFO L85 PathProgramCache]: Analyzing trace with hash -306318464, now seen corresponding path program 3 times [2024-06-27 20:41:30,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:30,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972321471] [2024-06-27 20:41:30,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:30,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:30,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:31,389 INFO 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 20:41:31,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:31,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972321471] [2024-06-27 20:41:31,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972321471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:31,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:31,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:41:31,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823774025] [2024-06-27 20:41:31,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:31,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:41:31,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:31,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:41:31,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:41:31,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:41:31,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 360 transitions, 4143 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 20:41:31,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:31,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:41:31,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:32,350 INFO L124 PetriNetUnfolderBase]: 2730/4257 cut-off events. [2024-06-27 20:41:32,350 INFO L125 PetriNetUnfolderBase]: For 459064/459072 co-relation queries the response was YES. [2024-06-27 20:41:32,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38309 conditions, 4257 events. 2730/4257 cut-off events. For 459064/459072 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 23569 event pairs, 570 based on Foata normal form. 6/4260 useless extension candidates. Maximal degree in co-relation 38189. Up to 3883 conditions per place. [2024-06-27 20:41:32,391 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 307 selfloop transitions, 72 changer transitions 0/383 dead transitions. [2024-06-27 20:41:32,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 383 transitions, 5247 flow [2024-06-27 20:41:32,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:41:32,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:41:32,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-27 20:41:32,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2024-06-27 20:41:32,393 INFO L175 Difference]: Start difference. First operand has 258 places, 360 transitions, 4143 flow. Second operand 9 states and 145 transitions. [2024-06-27 20:41:32,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 383 transitions, 5247 flow [2024-06-27 20:41:33,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 383 transitions, 5114 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-27 20:41:33,243 INFO L231 Difference]: Finished difference. Result has 260 places, 364 transitions, 4305 flow [2024-06-27 20:41:33,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4010, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4305, PETRI_PLACES=260, PETRI_TRANSITIONS=364} [2024-06-27 20:41:33,243 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 219 predicate places. [2024-06-27 20:41:33,243 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 364 transitions, 4305 flow [2024-06-27 20:41:33,244 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 20:41:33,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:33,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:33,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 20:41:33,244 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 20:41:33,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:33,244 INFO L85 PathProgramCache]: Analyzing trace with hash -369729468, now seen corresponding path program 4 times [2024-06-27 20:41:33,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:33,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040778534] [2024-06-27 20:41:33,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:33,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:33,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:33,892 INFO 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 20:41:33,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:33,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040778534] [2024-06-27 20:41:33,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040778534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:33,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:33,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:41:33,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345106593] [2024-06-27 20:41:33,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:33,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:41:33,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:33,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:41:33,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:41:33,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:41:33,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 364 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 20:41:33,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:33,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:41:33,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:34,878 INFO L124 PetriNetUnfolderBase]: 2836/4422 cut-off events. [2024-06-27 20:41:34,879 INFO L125 PetriNetUnfolderBase]: For 506458/506463 co-relation queries the response was YES. [2024-06-27 20:41:34,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41319 conditions, 4422 events. 2836/4422 cut-off events. For 506458/506463 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 24575 event pairs, 583 based on Foata normal form. 4/4422 useless extension candidates. Maximal degree in co-relation 41198. Up to 3377 conditions per place. [2024-06-27 20:41:34,931 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 264 selfloop transitions, 136 changer transitions 0/404 dead transitions. [2024-06-27 20:41:34,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 404 transitions, 6129 flow [2024-06-27 20:41:34,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:41:34,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:41:34,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 20:41:34,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-27 20:41:34,933 INFO L175 Difference]: Start difference. First operand has 260 places, 364 transitions, 4305 flow. Second operand 9 states and 159 transitions. [2024-06-27 20:41:34,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 404 transitions, 6129 flow [2024-06-27 20:41:36,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 404 transitions, 5862 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-06-27 20:41:36,005 INFO L231 Difference]: Finished difference. Result has 264 places, 377 transitions, 4777 flow [2024-06-27 20:41:36,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4038, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4777, PETRI_PLACES=264, PETRI_TRANSITIONS=377} [2024-06-27 20:41:36,006 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 223 predicate places. [2024-06-27 20:41:36,006 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 377 transitions, 4777 flow [2024-06-27 20:41:36,006 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 20:41:36,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:36,006 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 20:41:36,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 20:41:36,006 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 20:41:36,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:36,007 INFO L85 PathProgramCache]: Analyzing trace with hash -500200, now seen corresponding path program 4 times [2024-06-27 20:41:36,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:36,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137279744] [2024-06-27 20:41:36,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:36,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:36,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:36,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:36,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:36,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137279744] [2024-06-27 20:41:36,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137279744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:36,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:36,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:41:36,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073788677] [2024-06-27 20:41:36,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:36,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:41:36,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:36,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:41:36,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:41:36,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:41:36,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 377 transitions, 4777 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 20:41:36,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:36,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:41:36,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:37,490 INFO L124 PetriNetUnfolderBase]: 2846/4418 cut-off events. [2024-06-27 20:41:37,490 INFO L125 PetriNetUnfolderBase]: For 521429/521433 co-relation queries the response was YES. [2024-06-27 20:41:37,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42701 conditions, 4418 events. 2846/4418 cut-off events. For 521429/521433 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 24427 event pairs, 570 based on Foata normal form. 2/4400 useless extension candidates. Maximal degree in co-relation 42577. Up to 3840 conditions per place. [2024-06-27 20:41:37,553 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 314 selfloop transitions, 94 changer transitions 0/412 dead transitions. [2024-06-27 20:41:37,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 412 transitions, 5836 flow [2024-06-27 20:41:37,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:41:37,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:41:37,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 20:41:37,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 20:41:37,555 INFO L175 Difference]: Start difference. First operand has 264 places, 377 transitions, 4777 flow. Second operand 8 states and 136 transitions. [2024-06-27 20:41:37,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 412 transitions, 5836 flow [2024-06-27 20:41:38,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 412 transitions, 5484 flow, removed 109 selfloop flow, removed 4 redundant places. [2024-06-27 20:41:38,735 INFO L231 Difference]: Finished difference. Result has 270 places, 388 transitions, 4812 flow [2024-06-27 20:41:38,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4435, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4812, PETRI_PLACES=270, PETRI_TRANSITIONS=388} [2024-06-27 20:41:38,735 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 229 predicate places. [2024-06-27 20:41:38,736 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 388 transitions, 4812 flow [2024-06-27 20:41:38,736 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 20:41:38,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:38,736 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 20:41:38,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 20:41:38,736 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 20:41:38,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:38,737 INFO L85 PathProgramCache]: Analyzing trace with hash -809800006, now seen corresponding path program 5 times [2024-06-27 20:41:38,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:38,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081199680] [2024-06-27 20:41:38,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:38,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:38,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:39,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:39,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:39,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081199680] [2024-06-27 20:41:39,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081199680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:39,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:39,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:41:39,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962018424] [2024-06-27 20:41:39,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:39,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:41:39,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:39,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:41:39,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:41:39,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:41:39,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 388 transitions, 4812 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 20:41:39,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:39,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:41:39,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:40,244 INFO L124 PetriNetUnfolderBase]: 2856/4432 cut-off events. [2024-06-27 20:41:40,244 INFO L125 PetriNetUnfolderBase]: For 529528/529532 co-relation queries the response was YES. [2024-06-27 20:41:40,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43190 conditions, 4432 events. 2856/4432 cut-off events. For 529528/529532 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 24471 event pairs, 576 based on Foata normal form. 2/4414 useless extension candidates. Maximal degree in co-relation 43062. Up to 3854 conditions per place. [2024-06-27 20:41:40,299 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 320 selfloop transitions, 90 changer transitions 0/414 dead transitions. [2024-06-27 20:41:40,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 414 transitions, 5811 flow [2024-06-27 20:41:40,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:41:40,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:41:40,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 20:41:40,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-27 20:41:40,301 INFO L175 Difference]: Start difference. First operand has 270 places, 388 transitions, 4812 flow. Second operand 8 states and 137 transitions. [2024-06-27 20:41:40,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 414 transitions, 5811 flow [2024-06-27 20:41:41,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 414 transitions, 5627 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-27 20:41:41,461 INFO L231 Difference]: Finished difference. Result has 275 places, 391 transitions, 4910 flow [2024-06-27 20:41:41,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4628, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4910, PETRI_PLACES=275, PETRI_TRANSITIONS=391} [2024-06-27 20:41:41,461 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 234 predicate places. [2024-06-27 20:41:41,461 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 391 transitions, 4910 flow [2024-06-27 20:41:41,461 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 20:41:41,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:41,462 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 20:41:41,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 20:41:41,462 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 20:41:41,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:41,462 INFO L85 PathProgramCache]: Analyzing trace with hash -2080720438, now seen corresponding path program 4 times [2024-06-27 20:41:41,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:41,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644297861] [2024-06-27 20:41:41,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:41,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:41,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:41,942 INFO 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 20:41:41,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:41,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644297861] [2024-06-27 20:41:41,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644297861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:41,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:41,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:41:41,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142082736] [2024-06-27 20:41:41,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:41,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:41:41,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:41,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:41:41,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:41:42,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:41:42,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 391 transitions, 4910 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 20:41:42,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:42,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:41:42,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:42,904 INFO L124 PetriNetUnfolderBase]: 2849/4432 cut-off events. [2024-06-27 20:41:42,905 INFO L125 PetriNetUnfolderBase]: For 535377/535381 co-relation queries the response was YES. [2024-06-27 20:41:42,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43216 conditions, 4432 events. 2849/4432 cut-off events. For 535377/535381 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 24566 event pairs, 561 based on Foata normal form. 1/4423 useless extension candidates. Maximal degree in co-relation 43087. Up to 4152 conditions per place. [2024-06-27 20:41:42,960 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 368 selfloop transitions, 38 changer transitions 0/410 dead transitions. [2024-06-27 20:41:42,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 410 transitions, 5786 flow [2024-06-27 20:41:42,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:41:42,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:41:42,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 20:41:42,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-27 20:41:42,961 INFO L175 Difference]: Start difference. First operand has 275 places, 391 transitions, 4910 flow. Second operand 8 states and 127 transitions. [2024-06-27 20:41:42,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 410 transitions, 5786 flow [2024-06-27 20:41:44,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 410 transitions, 5474 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-06-27 20:41:44,229 INFO L231 Difference]: Finished difference. Result has 276 places, 391 transitions, 4680 flow [2024-06-27 20:41:44,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4598, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4680, PETRI_PLACES=276, PETRI_TRANSITIONS=391} [2024-06-27 20:41:44,230 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 235 predicate places. [2024-06-27 20:41:44,230 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 391 transitions, 4680 flow [2024-06-27 20:41:44,230 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 20:41:44,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:44,230 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 20:41:44,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 20:41:44,230 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 20:41:44,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:44,231 INFO L85 PathProgramCache]: Analyzing trace with hash -802615364, now seen corresponding path program 6 times [2024-06-27 20:41:44,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:44,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506636723] [2024-06-27 20:41:44,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:44,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:44,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:44,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:44,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:44,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506636723] [2024-06-27 20:41:44,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506636723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:44,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:44,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:41:44,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075803820] [2024-06-27 20:41:44,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:44,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:41:44,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:44,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:41:44,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:41:44,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:41:44,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 391 transitions, 4680 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 20:41:44,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:44,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:41:44,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:45,643 INFO L124 PetriNetUnfolderBase]: 2859/4429 cut-off events. [2024-06-27 20:41:45,643 INFO L125 PetriNetUnfolderBase]: For 549032/549036 co-relation queries the response was YES. [2024-06-27 20:41:45,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42533 conditions, 4429 events. 2859/4429 cut-off events. For 549032/549036 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 24368 event pairs, 564 based on Foata normal form. 2/4414 useless extension candidates. Maximal degree in co-relation 42405. Up to 3816 conditions per place. [2024-06-27 20:41:45,702 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 309 selfloop transitions, 106 changer transitions 0/419 dead transitions. [2024-06-27 20:41:45,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 419 transitions, 5726 flow [2024-06-27 20:41:45,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:41:45,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:41:45,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 20:41:45,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 20:41:45,703 INFO L175 Difference]: Start difference. First operand has 276 places, 391 transitions, 4680 flow. Second operand 8 states and 136 transitions. [2024-06-27 20:41:45,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 419 transitions, 5726 flow [2024-06-27 20:41:46,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 419 transitions, 5493 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-27 20:41:46,716 INFO L231 Difference]: Finished difference. Result has 275 places, 397 transitions, 4832 flow [2024-06-27 20:41:46,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4447, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4832, PETRI_PLACES=275, PETRI_TRANSITIONS=397} [2024-06-27 20:41:46,717 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 234 predicate places. [2024-06-27 20:41:46,717 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 397 transitions, 4832 flow [2024-06-27 20:41:46,718 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 20:41:46,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:46,718 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 20:41:46,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 20:41:46,718 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 20:41:46,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:46,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1041824384, now seen corresponding path program 7 times [2024-06-27 20:41:46,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:46,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816606695] [2024-06-27 20:41:46,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:46,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:46,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:47,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:47,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:47,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816606695] [2024-06-27 20:41:47,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816606695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:47,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:47,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:41:47,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860469984] [2024-06-27 20:41:47,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:47,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:41:47,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:47,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:41:47,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:41:47,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:41:47,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 397 transitions, 4832 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 20:41:47,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:47,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:41:47,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:48,100 INFO L124 PetriNetUnfolderBase]: 2861/4433 cut-off events. [2024-06-27 20:41:48,100 INFO L125 PetriNetUnfolderBase]: For 561935/561939 co-relation queries the response was YES. [2024-06-27 20:41:48,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43263 conditions, 4433 events. 2861/4433 cut-off events. For 561935/561939 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 24418 event pairs, 580 based on Foata normal form. 2/4418 useless extension candidates. Maximal degree in co-relation 43133. Up to 3832 conditions per place. [2024-06-27 20:41:48,156 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 321 selfloop transitions, 100 changer transitions 0/425 dead transitions. [2024-06-27 20:41:48,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 425 transitions, 6112 flow [2024-06-27 20:41:48,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:41:48,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:41:48,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 20:41:48,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-27 20:41:48,158 INFO L175 Difference]: Start difference. First operand has 275 places, 397 transitions, 4832 flow. Second operand 8 states and 137 transitions. [2024-06-27 20:41:48,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 425 transitions, 6112 flow [2024-06-27 20:41:49,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 425 transitions, 5899 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-27 20:41:49,519 INFO L231 Difference]: Finished difference. Result has 279 places, 403 transitions, 5025 flow [2024-06-27 20:41:49,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4619, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5025, PETRI_PLACES=279, PETRI_TRANSITIONS=403} [2024-06-27 20:41:49,519 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 238 predicate places. [2024-06-27 20:41:49,519 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 403 transitions, 5025 flow [2024-06-27 20:41:49,520 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 20:41:49,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:49,520 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 20:41:49,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 20:41:49,520 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 20:41:49,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:49,520 INFO L85 PathProgramCache]: Analyzing trace with hash -687561158, now seen corresponding path program 5 times [2024-06-27 20:41:49,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:49,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537123726] [2024-06-27 20:41:49,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:49,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:49,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:50,030 INFO 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 20:41:50,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:50,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537123726] [2024-06-27 20:41:50,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537123726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:50,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:50,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:41:50,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143812645] [2024-06-27 20:41:50,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:50,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:41:50,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:50,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:41:50,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:41:50,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:41:50,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 403 transitions, 5025 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 20:41:50,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:50,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:41:50,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:50,941 INFO L124 PetriNetUnfolderBase]: 2874/4465 cut-off events. [2024-06-27 20:41:50,941 INFO L125 PetriNetUnfolderBase]: For 576124/576128 co-relation queries the response was YES. [2024-06-27 20:41:50,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43925 conditions, 4465 events. 2874/4465 cut-off events. For 576124/576128 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 24683 event pairs, 562 based on Foata normal form. 1/4456 useless extension candidates. Maximal degree in co-relation 43793. Up to 4151 conditions per place. [2024-06-27 20:41:50,995 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 365 selfloop transitions, 57 changer transitions 0/426 dead transitions. [2024-06-27 20:41:50,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 426 transitions, 6246 flow [2024-06-27 20:41:50,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:41:50,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:41:50,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 20:41:50,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403125 [2024-06-27 20:41:50,997 INFO L175 Difference]: Start difference. First operand has 279 places, 403 transitions, 5025 flow. Second operand 8 states and 129 transitions. [2024-06-27 20:41:50,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 426 transitions, 6246 flow [2024-06-27 20:41:52,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 426 transitions, 6041 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-27 20:41:52,396 INFO L231 Difference]: Finished difference. Result has 284 places, 409 transitions, 5115 flow [2024-06-27 20:41:52,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4820, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5115, PETRI_PLACES=284, PETRI_TRANSITIONS=409} [2024-06-27 20:41:52,397 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 243 predicate places. [2024-06-27 20:41:52,397 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 409 transitions, 5115 flow [2024-06-27 20:41:52,397 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 20:41:52,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:52,397 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 20:41:52,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 20:41:52,397 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 20:41:52,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:52,398 INFO L85 PathProgramCache]: Analyzing trace with hash -687561344, now seen corresponding path program 8 times [2024-06-27 20:41:52,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:52,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250351030] [2024-06-27 20:41:52,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:52,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:52,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:52,916 INFO 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 20:41:52,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:52,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250351030] [2024-06-27 20:41:52,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250351030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:52,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:52,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:41:52,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130940125] [2024-06-27 20:41:52,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:52,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:41:52,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:52,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:41:52,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:41:53,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:41:53,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 409 transitions, 5115 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 20:41:53,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:53,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:41:53,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:53,877 INFO L124 PetriNetUnfolderBase]: 2900/4488 cut-off events. [2024-06-27 20:41:53,877 INFO L125 PetriNetUnfolderBase]: For 600783/600787 co-relation queries the response was YES. [2024-06-27 20:41:53,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44716 conditions, 4488 events. 2900/4488 cut-off events. For 600783/600787 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 24714 event pairs, 564 based on Foata normal form. 2/4473 useless extension candidates. Maximal degree in co-relation 44581. Up to 3776 conditions per place. [2024-06-27 20:41:53,934 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 304 selfloop transitions, 133 changer transitions 0/441 dead transitions. [2024-06-27 20:41:53,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 441 transitions, 6663 flow [2024-06-27 20:41:53,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:41:53,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:41:53,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 20:41:53,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-27 20:41:53,936 INFO L175 Difference]: Start difference. First operand has 284 places, 409 transitions, 5115 flow. Second operand 8 states and 137 transitions. [2024-06-27 20:41:53,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 441 transitions, 6663 flow [2024-06-27 20:41:55,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 441 transitions, 6507 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-27 20:41:55,135 INFO L231 Difference]: Finished difference. Result has 288 places, 420 transitions, 5566 flow [2024-06-27 20:41:55,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4959, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5566, PETRI_PLACES=288, PETRI_TRANSITIONS=420} [2024-06-27 20:41:55,136 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 247 predicate places. [2024-06-27 20:41:55,136 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 420 transitions, 5566 flow [2024-06-27 20:41:55,136 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 20:41:55,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:55,136 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 20:41:55,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 20:41:55,137 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 20:41:55,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:55,137 INFO L85 PathProgramCache]: Analyzing trace with hash 449909394, now seen corresponding path program 9 times [2024-06-27 20:41:55,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:55,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761867501] [2024-06-27 20:41:55,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:55,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:55,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:55,603 INFO 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 20:41:55,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:55,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761867501] [2024-06-27 20:41:55,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761867501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:55,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:55,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:41:55,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414909176] [2024-06-27 20:41:55,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:55,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:41:55,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:55,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:41:55,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:41:55,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:41:55,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 420 transitions, 5566 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 20:41:55,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:55,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:41:55,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:56,530 INFO L124 PetriNetUnfolderBase]: 2902/4496 cut-off events. [2024-06-27 20:41:56,530 INFO L125 PetriNetUnfolderBase]: For 614191/614195 co-relation queries the response was YES. [2024-06-27 20:41:56,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45604 conditions, 4496 events. 2902/4496 cut-off events. For 614191/614195 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 24787 event pairs, 564 based on Foata normal form. 2/4478 useless extension candidates. Maximal degree in co-relation 45467. Up to 3780 conditions per place. [2024-06-27 20:41:56,592 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 303 selfloop transitions, 137 changer transitions 0/444 dead transitions. [2024-06-27 20:41:56,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 444 transitions, 6821 flow [2024-06-27 20:41:56,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:41:56,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:41:56,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 20:41:56,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-27 20:41:56,593 INFO L175 Difference]: Start difference. First operand has 288 places, 420 transitions, 5566 flow. Second operand 8 states and 137 transitions. [2024-06-27 20:41:56,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 444 transitions, 6821 flow [2024-06-27 20:41:57,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 444 transitions, 6572 flow, removed 75 selfloop flow, removed 3 redundant places. [2024-06-27 20:41:57,974 INFO L231 Difference]: Finished difference. Result has 293 places, 424 transitions, 5728 flow [2024-06-27 20:41:57,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5345, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5728, PETRI_PLACES=293, PETRI_TRANSITIONS=424} [2024-06-27 20:41:57,975 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 252 predicate places. [2024-06-27 20:41:57,975 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 424 transitions, 5728 flow [2024-06-27 20:41:57,975 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 20:41:57,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:57,975 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 20:41:57,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 20:41:57,976 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 20:41:57,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:57,976 INFO L85 PathProgramCache]: Analyzing trace with hash 450088140, now seen corresponding path program 6 times [2024-06-27 20:41:57,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:57,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359269977] [2024-06-27 20:41:57,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:57,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:57,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:58,453 INFO 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 20:41:58,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:58,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359269977] [2024-06-27 20:41:58,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359269977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:58,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:58,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:41:58,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201673938] [2024-06-27 20:41:58,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:58,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:41:58,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:58,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:41:58,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:41:58,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:41:58,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 424 transitions, 5728 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 20:41:58,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:58,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:41:58,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:59,431 INFO L124 PetriNetUnfolderBase]: 2899/4507 cut-off events. [2024-06-27 20:41:59,431 INFO L125 PetriNetUnfolderBase]: For 618401/618403 co-relation queries the response was YES. [2024-06-27 20:41:59,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45812 conditions, 4507 events. 2899/4507 cut-off events. For 618401/618403 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 24953 event pairs, 602 based on Foata normal form. 1/4506 useless extension candidates. Maximal degree in co-relation 45673. Up to 4347 conditions per place. [2024-06-27 20:41:59,490 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 417 selfloop transitions, 17 changer transitions 0/438 dead transitions. [2024-06-27 20:41:59,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 438 transitions, 6636 flow [2024-06-27 20:41:59,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:41:59,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:41:59,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-27 20:41:59,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.371875 [2024-06-27 20:41:59,491 INFO L175 Difference]: Start difference. First operand has 293 places, 424 transitions, 5728 flow. Second operand 8 states and 119 transitions. [2024-06-27 20:41:59,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 438 transitions, 6636 flow [2024-06-27 20:42:00,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 438 transitions, 6306 flow, removed 69 selfloop flow, removed 4 redundant places. [2024-06-27 20:42:00,751 INFO L231 Difference]: Finished difference. Result has 297 places, 424 transitions, 5438 flow [2024-06-27 20:42:00,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5398, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5438, PETRI_PLACES=297, PETRI_TRANSITIONS=424} [2024-06-27 20:42:00,756 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 256 predicate places. [2024-06-27 20:42:00,756 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 424 transitions, 5438 flow [2024-06-27 20:42:00,756 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 20:42:00,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:00,756 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 20:42:00,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 20:42:00,757 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 20:42:00,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:00,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1302760396, now seen corresponding path program 10 times [2024-06-27 20:42:00,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:00,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527536097] [2024-06-27 20:42:00,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:00,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:00,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:01,259 INFO 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 20:42:01,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:01,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527536097] [2024-06-27 20:42:01,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527536097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:01,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:01,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:42:01,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798399257] [2024-06-27 20:42:01,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:01,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:42:01,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:01,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:42:01,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:42:01,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:42:01,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 424 transitions, 5438 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 20:42:01,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:01,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:42:01,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:02,224 INFO L124 PetriNetUnfolderBase]: 2919/4527 cut-off events. [2024-06-27 20:42:02,224 INFO L125 PetriNetUnfolderBase]: For 643703/643710 co-relation queries the response was YES. [2024-06-27 20:42:02,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45645 conditions, 4527 events. 2919/4527 cut-off events. For 643703/643710 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 25003 event pairs, 635 based on Foata normal form. 4/4517 useless extension candidates. Maximal degree in co-relation 45505. Up to 3594 conditions per place. [2024-06-27 20:42:02,277 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 301 selfloop transitions, 146 changer transitions 0/451 dead transitions. [2024-06-27 20:42:02,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 451 transitions, 7018 flow [2024-06-27 20:42:02,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:42:02,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:42:02,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 20:42:02,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-27 20:42:02,279 INFO L175 Difference]: Start difference. First operand has 297 places, 424 transitions, 5438 flow. Second operand 8 states and 135 transitions. [2024-06-27 20:42:02,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 451 transitions, 7018 flow [2024-06-27 20:42:03,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 451 transitions, 6980 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 20:42:03,993 INFO L231 Difference]: Finished difference. Result has 299 places, 433 transitions, 6018 flow [2024-06-27 20:42:03,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5400, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6018, PETRI_PLACES=299, PETRI_TRANSITIONS=433} [2024-06-27 20:42:03,994 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 258 predicate places. [2024-06-27 20:42:03,994 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 433 transitions, 6018 flow [2024-06-27 20:42:03,994 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 20:42:03,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:03,994 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 20:42:03,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 20:42:03,994 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 20:42:03,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:03,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1302760210, now seen corresponding path program 7 times [2024-06-27 20:42:03,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:03,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129657560] [2024-06-27 20:42:03,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:03,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:04,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:04,491 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 20:42:04,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:04,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129657560] [2024-06-27 20:42:04,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129657560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:04,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:04,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:42:04,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917777718] [2024-06-27 20:42:04,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:04,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:42:04,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:04,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:42:04,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:42:04,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:42:04,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 433 transitions, 6018 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 20:42:04,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:04,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:42:04,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:05,422 INFO L124 PetriNetUnfolderBase]: 2945/4561 cut-off events. [2024-06-27 20:42:05,422 INFO L125 PetriNetUnfolderBase]: For 665908/665918 co-relation queries the response was YES. [2024-06-27 20:42:05,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47606 conditions, 4561 events. 2945/4561 cut-off events. For 665908/665918 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 25174 event pairs, 590 based on Foata normal form. 6/4555 useless extension candidates. Maximal degree in co-relation 47464. Up to 4066 conditions per place. [2024-06-27 20:42:05,484 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 338 selfloop transitions, 115 changer transitions 0/457 dead transitions. [2024-06-27 20:42:05,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 457 transitions, 7583 flow [2024-06-27 20:42:05,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:42:05,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:42:05,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 20:42:05,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409375 [2024-06-27 20:42:05,485 INFO L175 Difference]: Start difference. First operand has 299 places, 433 transitions, 6018 flow. Second operand 8 states and 131 transitions. [2024-06-27 20:42:05,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 457 transitions, 7583 flow [2024-06-27 20:42:07,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 457 transitions, 7360 flow, removed 75 selfloop flow, removed 3 redundant places. [2024-06-27 20:42:07,335 INFO L231 Difference]: Finished difference. Result has 305 places, 443 transitions, 6318 flow [2024-06-27 20:42:07,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5795, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6318, PETRI_PLACES=305, PETRI_TRANSITIONS=443} [2024-06-27 20:42:07,335 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 264 predicate places. [2024-06-27 20:42:07,335 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 443 transitions, 6318 flow [2024-06-27 20:42:07,336 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 20:42:07,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:07,336 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 20:42:07,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 20:42:07,336 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 20:42:07,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:07,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1302523060, now seen corresponding path program 8 times [2024-06-27 20:42:07,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:07,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818643248] [2024-06-27 20:42:07,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:07,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:07,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:07,908 INFO 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 20:42:07,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:07,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818643248] [2024-06-27 20:42:07,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818643248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:07,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:07,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:42:07,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815894774] [2024-06-27 20:42:07,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:07,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:42:07,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:07,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:42:07,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:42:07,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:42:07,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 443 transitions, 6318 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 20:42:07,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:07,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:42:07,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:08,839 INFO L124 PetriNetUnfolderBase]: 2939/4553 cut-off events. [2024-06-27 20:42:08,840 INFO L125 PetriNetUnfolderBase]: For 664812/664822 co-relation queries the response was YES. [2024-06-27 20:42:08,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47242 conditions, 4553 events. 2939/4553 cut-off events. For 664812/664822 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 25136 event pairs, 594 based on Foata normal form. 6/4547 useless extension candidates. Maximal degree in co-relation 47097. Up to 4061 conditions per place. [2024-06-27 20:42:08,904 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 341 selfloop transitions, 112 changer transitions 0/457 dead transitions. [2024-06-27 20:42:08,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 457 transitions, 7624 flow [2024-06-27 20:42:08,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:42:08,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:42:08,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 20:42:08,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409375 [2024-06-27 20:42:08,906 INFO L175 Difference]: Start difference. First operand has 305 places, 443 transitions, 6318 flow. Second operand 8 states and 131 transitions. [2024-06-27 20:42:08,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 457 transitions, 7624 flow [2024-06-27 20:42:10,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 457 transitions, 7389 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-27 20:42:10,712 INFO L231 Difference]: Finished difference. Result has 309 places, 443 transitions, 6316 flow [2024-06-27 20:42:10,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6083, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6316, PETRI_PLACES=309, PETRI_TRANSITIONS=443} [2024-06-27 20:42:10,713 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 268 predicate places. [2024-06-27 20:42:10,713 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 443 transitions, 6316 flow [2024-06-27 20:42:10,713 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 20:42:10,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:10,714 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 20:42:10,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 20:42:10,714 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 20:42:10,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:10,714 INFO L85 PathProgramCache]: Analyzing trace with hash 615548528, now seen corresponding path program 11 times [2024-06-27 20:42:10,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:10,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760645024] [2024-06-27 20:42:10,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:10,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:10,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:11,337 INFO 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 20:42:11,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:11,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760645024] [2024-06-27 20:42:11,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760645024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:11,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:11,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:42:11,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721109690] [2024-06-27 20:42:11,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:11,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:42:11,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:11,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:42:11,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:42:11,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:42:11,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 443 transitions, 6316 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 20:42:11,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:11,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:42:11,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:12,284 INFO L124 PetriNetUnfolderBase]: 2949/4571 cut-off events. [2024-06-27 20:42:12,285 INFO L125 PetriNetUnfolderBase]: For 678587/678594 co-relation queries the response was YES. [2024-06-27 20:42:12,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47535 conditions, 4571 events. 2949/4571 cut-off events. For 678587/678594 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 25310 event pairs, 640 based on Foata normal form. 2/4559 useless extension candidates. Maximal degree in co-relation 47389. Up to 3628 conditions per place. [2024-06-27 20:42:12,349 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 306 selfloop transitions, 156 changer transitions 0/466 dead transitions. [2024-06-27 20:42:12,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 466 transitions, 7854 flow [2024-06-27 20:42:12,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:42:12,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:42:12,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 20:42:12,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-27 20:42:12,350 INFO L175 Difference]: Start difference. First operand has 309 places, 443 transitions, 6316 flow. Second operand 8 states and 134 transitions. [2024-06-27 20:42:12,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 466 transitions, 7854 flow [2024-06-27 20:42:14,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 466 transitions, 7596 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-27 20:42:14,318 INFO L231 Difference]: Finished difference. Result has 312 places, 449 transitions, 6570 flow [2024-06-27 20:42:14,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6058, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6570, PETRI_PLACES=312, PETRI_TRANSITIONS=449} [2024-06-27 20:42:14,319 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 271 predicate places. [2024-06-27 20:42:14,319 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 449 transitions, 6570 flow [2024-06-27 20:42:14,319 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 20:42:14,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:14,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:14,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 20:42:14,320 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 20:42:14,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:14,320 INFO L85 PathProgramCache]: Analyzing trace with hash 615727274, now seen corresponding path program 9 times [2024-06-27 20:42:14,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:14,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789725395] [2024-06-27 20:42:14,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:14,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:14,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:14,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:14,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:14,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789725395] [2024-06-27 20:42:14,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789725395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:14,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:14,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:42:14,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357062716] [2024-06-27 20:42:14,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:14,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:42:14,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:14,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:42:14,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:42:14,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:42:14,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 449 transitions, 6570 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 20:42:14,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:14,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:42:14,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:15,861 INFO L124 PetriNetUnfolderBase]: 2954/4575 cut-off events. [2024-06-27 20:42:15,862 INFO L125 PetriNetUnfolderBase]: For 692124/692132 co-relation queries the response was YES. [2024-06-27 20:42:15,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48029 conditions, 4575 events. 2954/4575 cut-off events. For 692124/692132 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 25255 event pairs, 618 based on Foata normal form. 5/4577 useless extension candidates. Maximal degree in co-relation 47882. Up to 4409 conditions per place. [2024-06-27 20:42:15,920 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 430 selfloop transitions, 29 changer transitions 0/463 dead transitions. [2024-06-27 20:42:15,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 463 transitions, 7605 flow [2024-06-27 20:42:15,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:42:15,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:42:15,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-27 20:42:15,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 20:42:15,922 INFO L175 Difference]: Start difference. First operand has 312 places, 449 transitions, 6570 flow. Second operand 8 states and 120 transitions. [2024-06-27 20:42:15,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 463 transitions, 7605 flow [2024-06-27 20:42:17,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 463 transitions, 7405 flow, removed 57 selfloop flow, removed 3 redundant places. [2024-06-27 20:42:17,843 INFO L231 Difference]: Finished difference. Result has 317 places, 452 transitions, 6527 flow [2024-06-27 20:42:17,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6370, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6527, PETRI_PLACES=317, PETRI_TRANSITIONS=452} [2024-06-27 20:42:17,852 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 276 predicate places. [2024-06-27 20:42:17,852 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 452 transitions, 6527 flow [2024-06-27 20:42:17,852 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 20:42:17,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:17,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:17,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 20:42:17,853 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 20:42:17,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:17,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1125628690, now seen corresponding path program 10 times [2024-06-27 20:42:17,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:17,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422300741] [2024-06-27 20:42:17,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:17,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:17,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:18,344 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 20:42:18,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:18,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422300741] [2024-06-27 20:42:18,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422300741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:18,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:18,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:42:18,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626321357] [2024-06-27 20:42:18,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:18,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:42:18,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:18,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:42:18,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:42:18,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:42:18,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 452 transitions, 6527 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 20:42:18,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:18,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:42:18,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:19,292 INFO L124 PetriNetUnfolderBase]: 2949/4568 cut-off events. [2024-06-27 20:42:19,292 INFO L125 PetriNetUnfolderBase]: For 694549/694559 co-relation queries the response was YES. [2024-06-27 20:42:19,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47792 conditions, 4568 events. 2949/4568 cut-off events. For 694549/694559 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 25235 event pairs, 593 based on Foata normal form. 5/4561 useless extension candidates. Maximal degree in co-relation 47643. Up to 4074 conditions per place. [2024-06-27 20:42:19,355 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 333 selfloop transitions, 129 changer transitions 0/466 dead transitions. [2024-06-27 20:42:19,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 466 transitions, 7863 flow [2024-06-27 20:42:19,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:42:19,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:42:19,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 20:42:19,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403125 [2024-06-27 20:42:19,356 INFO L175 Difference]: Start difference. First operand has 317 places, 452 transitions, 6527 flow. Second operand 8 states and 129 transitions. [2024-06-27 20:42:19,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 466 transitions, 7863 flow [2024-06-27 20:42:21,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 466 transitions, 7679 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-27 20:42:21,519 INFO L231 Difference]: Finished difference. Result has 319 places, 452 transitions, 6607 flow [2024-06-27 20:42:21,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6343, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6607, PETRI_PLACES=319, PETRI_TRANSITIONS=452} [2024-06-27 20:42:21,520 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 278 predicate places. [2024-06-27 20:42:21,520 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 452 transitions, 6607 flow [2024-06-27 20:42:21,520 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 20:42:21,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:21,520 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 20:42:21,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 20:42:21,521 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 20:42:21,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:21,521 INFO L85 PathProgramCache]: Analyzing trace with hash -903025750, now seen corresponding path program 11 times [2024-06-27 20:42:21,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:21,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27603243] [2024-06-27 20:42:21,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:21,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:21,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:22,045 INFO 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 20:42:22,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:22,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27603243] [2024-06-27 20:42:22,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27603243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:22,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:22,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:42:22,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989983239] [2024-06-27 20:42:22,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:22,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:42:22,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:22,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:42:22,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:42:22,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:42:22,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 452 transitions, 6607 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 20:42:22,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:22,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:42:22,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:23,058 INFO L124 PetriNetUnfolderBase]: 2943/4559 cut-off events. [2024-06-27 20:42:23,059 INFO L125 PetriNetUnfolderBase]: For 705681/705689 co-relation queries the response was YES. [2024-06-27 20:42:23,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47878 conditions, 4559 events. 2943/4559 cut-off events. For 705681/705689 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 25171 event pairs, 616 based on Foata normal form. 6/4562 useless extension candidates. Maximal degree in co-relation 47728. Up to 4365 conditions per place. [2024-06-27 20:42:23,124 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 418 selfloop transitions, 42 changer transitions 0/464 dead transitions. [2024-06-27 20:42:23,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 464 transitions, 7747 flow [2024-06-27 20:42:23,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:42:23,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:42:23,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-27 20:42:23,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.384375 [2024-06-27 20:42:23,126 INFO L175 Difference]: Start difference. First operand has 319 places, 452 transitions, 6607 flow. Second operand 8 states and 123 transitions. [2024-06-27 20:42:23,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 464 transitions, 7747 flow [2024-06-27 20:42:25,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 464 transitions, 7257 flow, removed 40 selfloop flow, removed 11 redundant places. [2024-06-27 20:42:25,110 INFO L231 Difference]: Finished difference. Result has 316 places, 452 transitions, 6209 flow [2024-06-27 20:42:25,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6117, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6209, PETRI_PLACES=316, PETRI_TRANSITIONS=452} [2024-06-27 20:42:25,110 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 275 predicate places. [2024-06-27 20:42:25,110 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 452 transitions, 6209 flow [2024-06-27 20:42:25,111 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 20:42:25,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:25,111 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 20:42:25,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 20:42:25,111 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 20:42:25,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:25,111 INFO L85 PathProgramCache]: Analyzing trace with hash -897311830, now seen corresponding path program 12 times [2024-06-27 20:42:25,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:25,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157615426] [2024-06-27 20:42:25,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:25,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:25,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:25,675 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 20:42:25,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:25,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157615426] [2024-06-27 20:42:25,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157615426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:25,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:25,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:42:25,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373346802] [2024-06-27 20:42:25,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:25,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:42:25,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:25,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:42:25,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:42:25,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:42:25,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 452 transitions, 6209 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 20:42:25,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:25,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:42:25,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:26,757 INFO L124 PetriNetUnfolderBase]: 2938/4553 cut-off events. [2024-06-27 20:42:26,758 INFO L125 PetriNetUnfolderBase]: For 708992/709000 co-relation queries the response was YES. [2024-06-27 20:42:26,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47359 conditions, 4553 events. 2938/4553 cut-off events. For 708992/709000 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 25191 event pairs, 618 based on Foata normal form. 5/4555 useless extension candidates. Maximal degree in co-relation 47210. Up to 4360 conditions per place. [2024-06-27 20:42:26,822 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 417 selfloop transitions, 44 changer transitions 0/465 dead transitions. [2024-06-27 20:42:26,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 465 transitions, 7165 flow [2024-06-27 20:42:26,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:42:26,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:42:26,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 146 transitions. [2024-06-27 20:42:26,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.365 [2024-06-27 20:42:26,823 INFO L175 Difference]: Start difference. First operand has 316 places, 452 transitions, 6209 flow. Second operand 10 states and 146 transitions. [2024-06-27 20:42:26,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 465 transitions, 7165 flow [2024-06-27 20:42:29,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 465 transitions, 7029 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 20:42:29,268 INFO L231 Difference]: Finished difference. Result has 320 places, 452 transitions, 6167 flow [2024-06-27 20:42:29,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6073, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6167, PETRI_PLACES=320, PETRI_TRANSITIONS=452} [2024-06-27 20:42:29,269 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 279 predicate places. [2024-06-27 20:42:29,269 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 452 transitions, 6167 flow [2024-06-27 20:42:29,269 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 20:42:29,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:29,269 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 20:42:29,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 20:42:29,270 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 20:42:29,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:29,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1125628876, now seen corresponding path program 12 times [2024-06-27 20:42:29,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:29,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530341361] [2024-06-27 20:42:29,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:29,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:29,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:29,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:29,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:29,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530341361] [2024-06-27 20:42:29,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530341361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:29,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:29,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:42:29,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169172730] [2024-06-27 20:42:29,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:29,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:42:29,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:29,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:42:29,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:42:29,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:42:29,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 452 transitions, 6167 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 20:42:29,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:29,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:42:29,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:30,776 INFO L124 PetriNetUnfolderBase]: 2932/4548 cut-off events. [2024-06-27 20:42:30,776 INFO L125 PetriNetUnfolderBase]: For 716117/716124 co-relation queries the response was YES. [2024-06-27 20:42:30,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47192 conditions, 4548 events. 2932/4548 cut-off events. For 716117/716124 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 25187 event pairs, 639 based on Foata normal form. 2/4536 useless extension candidates. Maximal degree in co-relation 47042. Up to 3610 conditions per place. [2024-06-27 20:42:30,834 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 311 selfloop transitions, 154 changer transitions 0/469 dead transitions. [2024-06-27 20:42:30,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 469 transitions, 7351 flow [2024-06-27 20:42:30,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:42:30,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:42:30,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 20:42:30,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-27 20:42:30,835 INFO L175 Difference]: Start difference. First operand has 320 places, 452 transitions, 6167 flow. Second operand 8 states and 134 transitions. [2024-06-27 20:42:30,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 469 transitions, 7351 flow [2024-06-27 20:42:33,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 469 transitions, 7154 flow, removed 32 selfloop flow, removed 11 redundant places. [2024-06-27 20:42:33,365 INFO L231 Difference]: Finished difference. Result has 317 places, 452 transitions, 6284 flow [2024-06-27 20:42:33,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5970, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6284, PETRI_PLACES=317, PETRI_TRANSITIONS=452} [2024-06-27 20:42:33,373 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 276 predicate places. [2024-06-27 20:42:33,373 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 452 transitions, 6284 flow [2024-06-27 20:42:33,373 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 20:42:33,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:33,373 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 20:42:33,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 20:42:33,374 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 20:42:33,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:33,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1302883528, now seen corresponding path program 4 times [2024-06-27 20:42:33,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:33,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705107119] [2024-06-27 20:42:33,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:33,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:33,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:33,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:33,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:33,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705107119] [2024-06-27 20:42:33,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705107119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:33,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:33,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:42:33,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288597343] [2024-06-27 20:42:33,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:33,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:42:33,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:33,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:42:33,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:42:34,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:42:34,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 452 transitions, 6284 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 20:42:34,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:34,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:42:34,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:34,888 INFO L124 PetriNetUnfolderBase]: 2935/4549 cut-off events. [2024-06-27 20:42:34,888 INFO L125 PetriNetUnfolderBase]: For 734517/734527 co-relation queries the response was YES. [2024-06-27 20:42:34,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47560 conditions, 4549 events. 2935/4549 cut-off events. For 734517/734527 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 25139 event pairs, 589 based on Foata normal form. 8/4545 useless extension candidates. Maximal degree in co-relation 47409. Up to 4184 conditions per place. [2024-06-27 20:42:34,956 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 399 selfloop transitions, 65 changer transitions 0/468 dead transitions. [2024-06-27 20:42:34,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 468 transitions, 7376 flow [2024-06-27 20:42:34,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:42:34,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:42:34,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 20:42:34,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39375 [2024-06-27 20:42:34,977 INFO L175 Difference]: Start difference. First operand has 317 places, 452 transitions, 6284 flow. Second operand 8 states and 126 transitions. [2024-06-27 20:42:34,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 468 transitions, 7376 flow [2024-06-27 20:42:37,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 468 transitions, 7093 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 20:42:37,985 INFO L231 Difference]: Finished difference. Result has 320 places, 455 transitions, 6269 flow [2024-06-27 20:42:37,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6001, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6269, PETRI_PLACES=320, PETRI_TRANSITIONS=455} [2024-06-27 20:42:37,986 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 279 predicate places. [2024-06-27 20:42:37,986 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 455 transitions, 6269 flow [2024-06-27 20:42:37,986 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 20:42:37,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:37,986 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 20:42:37,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 20:42:37,987 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 20:42:37,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:37,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1302514566, now seen corresponding path program 5 times [2024-06-27 20:42:37,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:37,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895166689] [2024-06-27 20:42:37,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:37,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:37,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:38,608 INFO 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 20:42:38,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:38,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895166689] [2024-06-27 20:42:38,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895166689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:38,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:38,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:42:38,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031551813] [2024-06-27 20:42:38,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:38,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:42:38,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:38,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:42:38,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:42:38,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:42:38,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 455 transitions, 6269 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 20:42:38,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:38,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:42:38,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:39,624 INFO L124 PetriNetUnfolderBase]: 2971/4602 cut-off events. [2024-06-27 20:42:39,625 INFO L125 PetriNetUnfolderBase]: For 755305/755315 co-relation queries the response was YES. [2024-06-27 20:42:39,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48592 conditions, 4602 events. 2971/4602 cut-off events. For 755305/755315 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 25452 event pairs, 592 based on Foata normal form. 6/4596 useless extension candidates. Maximal degree in co-relation 48440. Up to 4068 conditions per place. [2024-06-27 20:42:39,690 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 349 selfloop transitions, 126 changer transitions 0/479 dead transitions. [2024-06-27 20:42:39,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 479 transitions, 7823 flow [2024-06-27 20:42:39,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:42:39,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:42:39,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-27 20:42:39,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3925 [2024-06-27 20:42:39,692 INFO L175 Difference]: Start difference. First operand has 320 places, 455 transitions, 6269 flow. Second operand 10 states and 157 transitions. [2024-06-27 20:42:39,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 479 transitions, 7823 flow [2024-06-27 20:42:42,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 479 transitions, 7577 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-27 20:42:42,458 INFO L231 Difference]: Finished difference. Result has 325 places, 463 transitions, 6609 flow [2024-06-27 20:42:42,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6023, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6609, PETRI_PLACES=325, PETRI_TRANSITIONS=463} [2024-06-27 20:42:42,460 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 284 predicate places. [2024-06-27 20:42:42,460 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 463 transitions, 6609 flow [2024-06-27 20:42:42,460 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 20:42:42,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:42,460 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 20:42:42,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 20:42:42,461 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 20:42:42,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:42,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1302872616, now seen corresponding path program 6 times [2024-06-27 20:42:42,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:42,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939516385] [2024-06-27 20:42:42,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:42,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:42,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:43,121 INFO 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 20:42:43,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:43,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939516385] [2024-06-27 20:42:43,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939516385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:43,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:43,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:42:43,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272113572] [2024-06-27 20:42:43,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:43,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:42:43,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:43,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:42:43,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:42:43,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:42:43,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 463 transitions, 6609 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 20:42:43,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:43,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:42:43,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:44,217 INFO L124 PetriNetUnfolderBase]: 2973/4605 cut-off events. [2024-06-27 20:42:44,218 INFO L125 PetriNetUnfolderBase]: For 764864/764874 co-relation queries the response was YES. [2024-06-27 20:42:44,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49015 conditions, 4605 events. 2973/4605 cut-off events. For 764864/764874 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 25475 event pairs, 594 based on Foata normal form. 6/4599 useless extension candidates. Maximal degree in co-relation 48861. Up to 4108 conditions per place. [2024-06-27 20:42:44,279 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 348 selfloop transitions, 128 changer transitions 0/480 dead transitions. [2024-06-27 20:42:44,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 480 transitions, 7764 flow [2024-06-27 20:42:44,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:42:44,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:42:44,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-27 20:42:44,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39444444444444443 [2024-06-27 20:42:44,281 INFO L175 Difference]: Start difference. First operand has 325 places, 463 transitions, 6609 flow. Second operand 9 states and 142 transitions. [2024-06-27 20:42:44,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 480 transitions, 7764 flow [2024-06-27 20:42:46,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 480 transitions, 7394 flow, removed 112 selfloop flow, removed 6 redundant places. [2024-06-27 20:42:46,856 INFO L231 Difference]: Finished difference. Result has 328 places, 467 transitions, 6675 flow [2024-06-27 20:42:46,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6271, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6675, PETRI_PLACES=328, PETRI_TRANSITIONS=467} [2024-06-27 20:42:46,857 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 287 predicate places. [2024-06-27 20:42:46,857 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 467 transitions, 6675 flow [2024-06-27 20:42:46,858 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 20:42:46,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:46,858 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 20:42:46,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 20:42:46,858 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 20:42:46,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:46,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1302514132, now seen corresponding path program 2 times [2024-06-27 20:42:46,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:46,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342253375] [2024-06-27 20:42:46,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:46,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:46,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:47,529 INFO 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 20:42:47,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:47,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342253375] [2024-06-27 20:42:47,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342253375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:47,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:47,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:42:47,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652789162] [2024-06-27 20:42:47,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:47,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:42:47,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:47,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:42:47,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:42:47,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:42:47,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 467 transitions, 6675 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 20:42:47,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:47,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:42:47,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:48,518 INFO L124 PetriNetUnfolderBase]: 2981/4630 cut-off events. [2024-06-27 20:42:48,518 INFO L125 PetriNetUnfolderBase]: For 781339/781349 co-relation queries the response was YES. [2024-06-27 20:42:48,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49461 conditions, 4630 events. 2981/4630 cut-off events. For 781339/781349 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 25749 event pairs, 577 based on Foata normal form. 10/4636 useless extension candidates. Maximal degree in co-relation 49305. Up to 4430 conditions per place. [2024-06-27 20:42:48,586 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 447 selfloop transitions, 33 changer transitions 0/484 dead transitions. [2024-06-27 20:42:48,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 484 transitions, 7809 flow [2024-06-27 20:42:48,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:42:48,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:42:48,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 132 transitions. [2024-06-27 20:42:48,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-27 20:42:48,588 INFO L175 Difference]: Start difference. First operand has 328 places, 467 transitions, 6675 flow. Second operand 9 states and 132 transitions. [2024-06-27 20:42:48,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 484 transitions, 7809 flow [2024-06-27 20:42:51,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 484 transitions, 7442 flow, removed 58 selfloop flow, removed 7 redundant places. [2024-06-27 20:42:51,413 INFO L231 Difference]: Finished difference. Result has 330 places, 469 transitions, 6511 flow [2024-06-27 20:42:51,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6308, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6511, PETRI_PLACES=330, PETRI_TRANSITIONS=469} [2024-06-27 20:42:51,414 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 289 predicate places. [2024-06-27 20:42:51,414 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 469 transitions, 6511 flow [2024-06-27 20:42:51,414 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 20:42:51,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:51,414 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 20:42:51,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 20:42:51,414 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 20:42:51,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:51,415 INFO L85 PathProgramCache]: Analyzing trace with hash -889207252, now seen corresponding path program 3 times [2024-06-27 20:42:51,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:51,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556715293] [2024-06-27 20:42:51,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:51,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:51,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:52,245 INFO 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 20:42:52,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:52,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556715293] [2024-06-27 20:42:52,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556715293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:52,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:52,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:42:52,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636589638] [2024-06-27 20:42:52,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:52,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:42:52,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:52,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:42:52,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:42:52,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:42:52,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 469 transitions, 6511 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 20:42:52,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:52,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:42:52,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:53,434 INFO L124 PetriNetUnfolderBase]: 2989/4631 cut-off events. [2024-06-27 20:42:53,434 INFO L125 PetriNetUnfolderBase]: For 802152/802154 co-relation queries the response was YES. [2024-06-27 20:42:53,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49557 conditions, 4631 events. 2989/4631 cut-off events. For 802152/802154 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 25678 event pairs, 612 based on Foata normal form. 2/4631 useless extension candidates. Maximal degree in co-relation 49400. Up to 4468 conditions per place. [2024-06-27 20:42:53,502 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 456 selfloop transitions, 25 changer transitions 0/485 dead transitions. [2024-06-27 20:42:53,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 485 transitions, 7641 flow [2024-06-27 20:42:53,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:42:53,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:42:53,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 140 transitions. [2024-06-27 20:42:53,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35 [2024-06-27 20:42:53,503 INFO L175 Difference]: Start difference. First operand has 330 places, 469 transitions, 6511 flow. Second operand 10 states and 140 transitions. [2024-06-27 20:42:53,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 485 transitions, 7641 flow [2024-06-27 20:42:56,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 485 transitions, 7450 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-06-27 20:42:56,210 INFO L231 Difference]: Finished difference. Result has 333 places, 471 transitions, 6512 flow [2024-06-27 20:42:56,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6320, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6512, PETRI_PLACES=333, PETRI_TRANSITIONS=471} [2024-06-27 20:42:56,211 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 292 predicate places. [2024-06-27 20:42:56,211 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 471 transitions, 6512 flow [2024-06-27 20:42:56,224 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 20:42:56,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:56,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:56,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 20:42:56,224 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 20:42:56,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:56,225 INFO L85 PathProgramCache]: Analyzing trace with hash -889207686, now seen corresponding path program 7 times [2024-06-27 20:42:56,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:56,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52785065] [2024-06-27 20:42:56,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:56,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:56,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:57,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:57,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:57,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52785065] [2024-06-27 20:42:57,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52785065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:57,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:57,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:42:57,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012693664] [2024-06-27 20:42:57,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:57,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:42:57,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:57,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:42:57,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:42:57,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:42:57,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 471 transitions, 6512 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 20:42:57,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:57,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:42:57,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:58,129 INFO L124 PetriNetUnfolderBase]: 2993/4637 cut-off events. [2024-06-27 20:42:58,130 INFO L125 PetriNetUnfolderBase]: For 812386/812394 co-relation queries the response was YES. [2024-06-27 20:42:58,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49532 conditions, 4637 events. 2993/4637 cut-off events. For 812386/812394 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 25795 event pairs, 616 based on Foata normal form. 6/4640 useless extension candidates. Maximal degree in co-relation 49374. Up to 4381 conditions per place. [2024-06-27 20:42:58,196 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 422 selfloop transitions, 68 changer transitions 0/494 dead transitions. [2024-06-27 20:42:58,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 494 transitions, 8062 flow [2024-06-27 20:42:58,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:42:58,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:42:58,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 163 transitions. [2024-06-27 20:42:58,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3704545454545455 [2024-06-27 20:42:58,197 INFO L175 Difference]: Start difference. First operand has 333 places, 471 transitions, 6512 flow. Second operand 11 states and 163 transitions. [2024-06-27 20:42:58,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 494 transitions, 8062 flow [2024-06-27 20:43:00,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 494 transitions, 7888 flow, removed 64 selfloop flow, removed 8 redundant places. [2024-06-27 20:43:00,563 INFO L231 Difference]: Finished difference. Result has 337 places, 479 transitions, 6840 flow [2024-06-27 20:43:00,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6338, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6840, PETRI_PLACES=337, PETRI_TRANSITIONS=479} [2024-06-27 20:43:00,564 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 296 predicate places. [2024-06-27 20:43:00,564 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 479 transitions, 6840 flow [2024-06-27 20:43:00,564 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 20:43:00,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:00,564 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 20:43:00,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 20:43:00,564 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 20:43:00,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:00,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1290478072, now seen corresponding path program 4 times [2024-06-27 20:43:00,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:00,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653435032] [2024-06-27 20:43:00,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:00,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:00,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:01,221 INFO 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 20:43:01,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:01,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653435032] [2024-06-27 20:43:01,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653435032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:01,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:01,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:43:01,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696638730] [2024-06-27 20:43:01,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:01,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:43:01,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:01,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:43:01,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:43:01,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:43:01,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 479 transitions, 6840 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 20:43:01,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:01,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:43:01,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:02,359 INFO L124 PetriNetUnfolderBase]: 2988/4629 cut-off events. [2024-06-27 20:43:02,360 INFO L125 PetriNetUnfolderBase]: For 817613/817615 co-relation queries the response was YES. [2024-06-27 20:43:02,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49582 conditions, 4629 events. 2988/4629 cut-off events. For 817613/817615 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 25677 event pairs, 611 based on Foata normal form. 2/4629 useless extension candidates. Maximal degree in co-relation 49422. Up to 4453 conditions per place. [2024-06-27 20:43:02,427 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 464 selfloop transitions, 28 changer transitions 0/496 dead transitions. [2024-06-27 20:43:02,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 496 transitions, 8002 flow [2024-06-27 20:43:02,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:43:02,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:43:02,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 142 transitions. [2024-06-27 20:43:02,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.355 [2024-06-27 20:43:02,429 INFO L175 Difference]: Start difference. First operand has 337 places, 479 transitions, 6840 flow. Second operand 10 states and 142 transitions. [2024-06-27 20:43:02,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 496 transitions, 8002 flow [2024-06-27 20:43:05,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 496 transitions, 7708 flow, removed 109 selfloop flow, removed 7 redundant places. [2024-06-27 20:43:05,644 INFO L231 Difference]: Finished difference. Result has 340 places, 481 transitions, 6751 flow [2024-06-27 20:43:05,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6546, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6751, PETRI_PLACES=340, PETRI_TRANSITIONS=481} [2024-06-27 20:43:05,645 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 299 predicate places. [2024-06-27 20:43:05,645 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 481 transitions, 6751 flow [2024-06-27 20:43:05,645 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 20:43:05,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:05,645 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 20:43:05,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 20:43:05,645 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 20:43:05,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:05,646 INFO L85 PathProgramCache]: Analyzing trace with hash 334509042, now seen corresponding path program 1 times [2024-06-27 20:43:05,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:05,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380525513] [2024-06-27 20:43:05,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:05,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:05,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:06,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:06,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:06,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380525513] [2024-06-27 20:43:06,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380525513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:06,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:06,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:43:06,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730203626] [2024-06-27 20:43:06,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:06,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:43:06,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:06,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:43:06,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:43:06,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:43:06,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 481 transitions, 6751 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 20:43:06,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:06,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:43:06,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:07,584 INFO L124 PetriNetUnfolderBase]: 2888/4528 cut-off events. [2024-06-27 20:43:07,584 INFO L125 PetriNetUnfolderBase]: For 861304/861312 co-relation queries the response was YES. [2024-06-27 20:43:07,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49348 conditions, 4528 events. 2888/4528 cut-off events. For 861304/861312 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 25669 event pairs, 546 based on Foata normal form. 4/4516 useless extension candidates. Maximal degree in co-relation 49186. Up to 4160 conditions per place. [2024-06-27 20:43:07,643 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 443 selfloop transitions, 17 changer transitions 0/505 dead transitions. [2024-06-27 20:43:07,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 505 transitions, 7787 flow [2024-06-27 20:43:07,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:43:07,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:43:07,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 20:43:07,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-27 20:43:07,644 INFO L175 Difference]: Start difference. First operand has 340 places, 481 transitions, 6751 flow. Second operand 8 states and 133 transitions. [2024-06-27 20:43:07,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 505 transitions, 7787 flow [2024-06-27 20:43:10,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 505 transitions, 7598 flow, removed 68 selfloop flow, removed 8 redundant places. [2024-06-27 20:43:10,371 INFO L231 Difference]: Finished difference. Result has 340 places, 483 transitions, 6657 flow [2024-06-27 20:43:10,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6562, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6657, PETRI_PLACES=340, PETRI_TRANSITIONS=483} [2024-06-27 20:43:10,371 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 299 predicate places. [2024-06-27 20:43:10,372 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 483 transitions, 6657 flow [2024-06-27 20:43:10,372 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 20:43:10,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:10,372 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 20:43:10,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 20:43:10,372 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 20:43:10,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:10,373 INFO L85 PathProgramCache]: Analyzing trace with hash 331830642, now seen corresponding path program 2 times [2024-06-27 20:43:10,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:10,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420847724] [2024-06-27 20:43:10,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:10,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:10,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:11,211 INFO 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 20:43:11,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:11,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420847724] [2024-06-27 20:43:11,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420847724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:11,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:11,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:43:11,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820543396] [2024-06-27 20:43:11,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:11,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:43:11,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:11,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:43:11,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:43:11,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:43:11,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 483 transitions, 6657 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 20:43:11,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:11,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:43:11,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:12,401 INFO L124 PetriNetUnfolderBase]: 2900/4553 cut-off events. [2024-06-27 20:43:12,401 INFO L125 PetriNetUnfolderBase]: For 873445/873451 co-relation queries the response was YES. [2024-06-27 20:43:12,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49553 conditions, 4553 events. 2900/4553 cut-off events. For 873445/873451 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 25907 event pairs, 575 based on Foata normal form. 4/4545 useless extension candidates. Maximal degree in co-relation 49390. Up to 4181 conditions per place. [2024-06-27 20:43:12,473 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 434 selfloop transitions, 25 changer transitions 0/504 dead transitions. [2024-06-27 20:43:12,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 504 transitions, 7689 flow [2024-06-27 20:43:12,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:43:12,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:43:12,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 20:43:12,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409375 [2024-06-27 20:43:12,474 INFO L175 Difference]: Start difference. First operand has 340 places, 483 transitions, 6657 flow. Second operand 8 states and 131 transitions. [2024-06-27 20:43:12,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 504 transitions, 7689 flow [2024-06-27 20:43:15,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 504 transitions, 7610 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 20:43:15,656 INFO L231 Difference]: Finished difference. Result has 342 places, 485 transitions, 6696 flow [2024-06-27 20:43:15,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6578, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6696, PETRI_PLACES=342, PETRI_TRANSITIONS=485} [2024-06-27 20:43:15,656 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 301 predicate places. [2024-06-27 20:43:15,657 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 485 transitions, 6696 flow [2024-06-27 20:43:15,657 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 20:43:15,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:15,657 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 20:43:15,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 20:43:15,657 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 20:43:15,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:15,658 INFO L85 PathProgramCache]: Analyzing trace with hash -802601476, now seen corresponding path program 1 times [2024-06-27 20:43:15,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:15,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629616707] [2024-06-27 20:43:15,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:15,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:15,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:16,307 INFO 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 20:43:16,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:16,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629616707] [2024-06-27 20:43:16,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629616707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:16,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:16,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:43:16,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558229462] [2024-06-27 20:43:16,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:16,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:43:16,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:16,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:43:16,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:43:16,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:43:16,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 485 transitions, 6696 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 20:43:16,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:16,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:43:16,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:17,427 INFO L124 PetriNetUnfolderBase]: 3030/4687 cut-off events. [2024-06-27 20:43:17,427 INFO L125 PetriNetUnfolderBase]: For 865880/865882 co-relation queries the response was YES. [2024-06-27 20:43:17,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50228 conditions, 4687 events. 3030/4687 cut-off events. For 865880/865882 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 26000 event pairs, 603 based on Foata normal form. 2/4687 useless extension candidates. Maximal degree in co-relation 50064. Up to 4506 conditions per place. [2024-06-27 20:43:17,497 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 482 selfloop transitions, 23 changer transitions 0/509 dead transitions. [2024-06-27 20:43:17,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 509 transitions, 7821 flow [2024-06-27 20:43:17,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:43:17,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:43:17,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-27 20:43:17,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-27 20:43:17,498 INFO L175 Difference]: Start difference. First operand has 342 places, 485 transitions, 6696 flow. Second operand 9 states and 138 transitions. [2024-06-27 20:43:17,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 509 transitions, 7821 flow [2024-06-27 20:43:20,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 509 transitions, 7725 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 20:43:20,609 INFO L231 Difference]: Finished difference. Result has 345 places, 488 transitions, 6703 flow [2024-06-27 20:43:20,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6600, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6703, PETRI_PLACES=345, PETRI_TRANSITIONS=488} [2024-06-27 20:43:20,609 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 304 predicate places. [2024-06-27 20:43:20,609 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 488 transitions, 6703 flow [2024-06-27 20:43:20,609 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 20:43:20,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:20,610 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 20:43:20,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 20:43:20,610 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 20:43:20,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:20,610 INFO L85 PathProgramCache]: Analyzing trace with hash -687315266, now seen corresponding path program 3 times [2024-06-27 20:43:20,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:20,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57922489] [2024-06-27 20:43:20,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:20,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:20,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:21,388 INFO 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 20:43:21,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:21,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57922489] [2024-06-27 20:43:21,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57922489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:21,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:21,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:43:21,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765454688] [2024-06-27 20:43:21,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:21,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:43:21,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:21,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:43:21,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:43:21,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:43:21,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 488 transitions, 6703 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 20:43:21,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:21,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:43:21,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:22,509 INFO L124 PetriNetUnfolderBase]: 2959/4651 cut-off events. [2024-06-27 20:43:22,509 INFO L125 PetriNetUnfolderBase]: For 974146/974154 co-relation queries the response was YES. [2024-06-27 20:43:22,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50773 conditions, 4651 events. 2959/4651 cut-off events. For 974146/974154 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 26621 event pairs, 563 based on Foata normal form. 14/4648 useless extension candidates. Maximal degree in co-relation 50608. Up to 4189 conditions per place. [2024-06-27 20:43:22,580 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 424 selfloop transitions, 43 changer transitions 0/512 dead transitions. [2024-06-27 20:43:22,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 512 transitions, 8021 flow [2024-06-27 20:43:22,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:43:22,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:43:22,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 20:43:22,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-27 20:43:22,582 INFO L175 Difference]: Start difference. First operand has 345 places, 488 transitions, 6703 flow. Second operand 8 states and 138 transitions. [2024-06-27 20:43:22,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 512 transitions, 8021 flow [2024-06-27 20:43:25,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 512 transitions, 7899 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-27 20:43:25,996 INFO L231 Difference]: Finished difference. Result has 345 places, 490 transitions, 6739 flow [2024-06-27 20:43:25,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6581, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6739, PETRI_PLACES=345, PETRI_TRANSITIONS=490} [2024-06-27 20:43:25,997 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 304 predicate places. [2024-06-27 20:43:25,997 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 490 transitions, 6739 flow [2024-06-27 20:43:25,997 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 20:43:25,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:25,997 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 20:43:25,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 20:43:25,997 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 20:43:25,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:25,998 INFO L85 PathProgramCache]: Analyzing trace with hash -687137326, now seen corresponding path program 2 times [2024-06-27 20:43:25,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:25,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753130354] [2024-06-27 20:43:25,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:25,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:26,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:26,569 INFO 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 20:43:26,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:26,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753130354] [2024-06-27 20:43:26,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753130354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:26,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:26,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:43:26,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837095050] [2024-06-27 20:43:26,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:26,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:43:26,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:26,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:43:26,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:43:26,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:43:26,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 490 transitions, 6739 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 20:43:26,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:26,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:43:26,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:27,674 INFO L124 PetriNetUnfolderBase]: 3076/4759 cut-off events. [2024-06-27 20:43:27,674 INFO L125 PetriNetUnfolderBase]: For 886687/886689 co-relation queries the response was YES. [2024-06-27 20:43:27,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50909 conditions, 4759 events. 3076/4759 cut-off events. For 886687/886689 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 26510 event pairs, 606 based on Foata normal form. 2/4759 useless extension candidates. Maximal degree in co-relation 50744. Up to 4537 conditions per place. [2024-06-27 20:43:27,742 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 460 selfloop transitions, 43 changer transitions 0/507 dead transitions. [2024-06-27 20:43:27,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 507 transitions, 7803 flow [2024-06-27 20:43:27,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:43:27,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:43:27,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 20:43:27,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-27 20:43:27,743 INFO L175 Difference]: Start difference. First operand has 345 places, 490 transitions, 6739 flow. Second operand 8 states and 127 transitions. [2024-06-27 20:43:27,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 507 transitions, 7803 flow [2024-06-27 20:43:30,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 507 transitions, 7661 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-27 20:43:30,827 INFO L231 Difference]: Finished difference. Result has 347 places, 490 transitions, 6698 flow [2024-06-27 20:43:30,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6597, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6698, PETRI_PLACES=347, PETRI_TRANSITIONS=490} [2024-06-27 20:43:30,828 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 306 predicate places. [2024-06-27 20:43:30,828 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 490 transitions, 6698 flow [2024-06-27 20:43:30,828 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 20:43:30,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:30,828 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 20:43:30,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 20:43:30,828 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 20:43:30,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:30,829 INFO L85 PathProgramCache]: Analyzing trace with hash -687130568, now seen corresponding path program 1 times [2024-06-27 20:43:30,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:30,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373610645] [2024-06-27 20:43:30,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:30,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:30,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:31,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:31,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:31,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373610645] [2024-06-27 20:43:31,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373610645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:31,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:31,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:43:31,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94527577] [2024-06-27 20:43:31,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:31,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:43:31,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:31,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:43:31,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:43:31,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:43:31,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 490 transitions, 6698 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 20:43:31,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:31,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:43:31,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:32,778 INFO L124 PetriNetUnfolderBase]: 3120/4829 cut-off events. [2024-06-27 20:43:32,778 INFO L125 PetriNetUnfolderBase]: For 959224/959226 co-relation queries the response was YES. [2024-06-27 20:43:32,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51380 conditions, 4829 events. 3120/4829 cut-off events. For 959224/959226 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 26960 event pairs, 617 based on Foata normal form. 12/4839 useless extension candidates. Maximal degree in co-relation 51214. Up to 4551 conditions per place. [2024-06-27 20:43:32,843 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 466 selfloop transitions, 45 changer transitions 0/515 dead transitions. [2024-06-27 20:43:32,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 515 transitions, 7910 flow [2024-06-27 20:43:32,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:43:32,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:43:32,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-27 20:43:32,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3972222222222222 [2024-06-27 20:43:32,844 INFO L175 Difference]: Start difference. First operand has 347 places, 490 transitions, 6698 flow. Second operand 9 states and 143 transitions. [2024-06-27 20:43:32,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 515 transitions, 7910 flow [2024-06-27 20:43:35,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 515 transitions, 7576 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-27 20:43:35,759 INFO L231 Difference]: Finished difference. Result has 347 places, 492 transitions, 6541 flow [2024-06-27 20:43:35,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6364, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6541, PETRI_PLACES=347, PETRI_TRANSITIONS=492} [2024-06-27 20:43:35,759 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 306 predicate places. [2024-06-27 20:43:35,759 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 492 transitions, 6541 flow [2024-06-27 20:43:35,760 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 20:43:35,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:35,760 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 20:43:35,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 20:43:35,760 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 20:43:35,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:35,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1125382798, now seen corresponding path program 4 times [2024-06-27 20:43:35,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:35,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416572995] [2024-06-27 20:43:35,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:35,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:35,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:36,460 INFO 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 20:43:36,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:36,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416572995] [2024-06-27 20:43:36,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416572995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:36,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:36,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:43:36,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290267058] [2024-06-27 20:43:36,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:36,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:43:36,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:36,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:43:36,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:43:36,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:43:36,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 492 transitions, 6541 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 20:43:36,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:36,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:43:36,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:37,599 INFO L124 PetriNetUnfolderBase]: 3022/4745 cut-off events. [2024-06-27 20:43:37,600 INFO L125 PetriNetUnfolderBase]: For 957864/957877 co-relation queries the response was YES. [2024-06-27 20:43:37,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50563 conditions, 4745 events. 3022/4745 cut-off events. For 957864/957877 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 27221 event pairs, 595 based on Foata normal form. 14/4736 useless extension candidates. Maximal degree in co-relation 50398. Up to 4230 conditions per place. [2024-06-27 20:43:37,677 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 395 selfloop transitions, 74 changer transitions 0/514 dead transitions. [2024-06-27 20:43:37,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 514 transitions, 7867 flow [2024-06-27 20:43:37,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:43:37,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:43:37,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 20:43:37,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 20:43:37,679 INFO L175 Difference]: Start difference. First operand has 347 places, 492 transitions, 6541 flow. Second operand 8 states and 140 transitions. [2024-06-27 20:43:37,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 514 transitions, 7867 flow [2024-06-27 20:43:40,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 514 transitions, 7734 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-27 20:43:40,395 INFO L231 Difference]: Finished difference. Result has 348 places, 494 transitions, 6635 flow [2024-06-27 20:43:40,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6408, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6635, PETRI_PLACES=348, PETRI_TRANSITIONS=494} [2024-06-27 20:43:40,395 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 307 predicate places. [2024-06-27 20:43:40,395 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 494 transitions, 6635 flow [2024-06-27 20:43:40,395 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 20:43:40,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:40,396 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 20:43:40,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 20:43:40,396 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 20:43:40,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:40,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1125198100, now seen corresponding path program 2 times [2024-06-27 20:43:40,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:40,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119246905] [2024-06-27 20:43:40,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:40,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:40,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:41,154 INFO 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 20:43:41,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:41,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119246905] [2024-06-27 20:43:41,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119246905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:41,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:41,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:43:41,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610159085] [2024-06-27 20:43:41,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:41,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:43:41,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:41,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:43:41,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:43:41,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:43:41,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 494 transitions, 6635 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 20:43:41,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:41,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:43:41,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:42,334 INFO L124 PetriNetUnfolderBase]: 3190/4943 cut-off events. [2024-06-27 20:43:42,334 INFO L125 PetriNetUnfolderBase]: For 939622/939627 co-relation queries the response was YES. [2024-06-27 20:43:42,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51476 conditions, 4943 events. 3190/4943 cut-off events. For 939622/939627 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 27775 event pairs, 639 based on Foata normal form. 12/4951 useless extension candidates. Maximal degree in co-relation 51310. Up to 4640 conditions per place. [2024-06-27 20:43:42,409 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 456 selfloop transitions, 57 changer transitions 0/517 dead transitions. [2024-06-27 20:43:42,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 517 transitions, 7853 flow [2024-06-27 20:43:42,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:43:42,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:43:42,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-27 20:43:42,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40555555555555556 [2024-06-27 20:43:42,410 INFO L175 Difference]: Start difference. First operand has 348 places, 494 transitions, 6635 flow. Second operand 9 states and 146 transitions. [2024-06-27 20:43:42,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 517 transitions, 7853 flow [2024-06-27 20:43:45,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 517 transitions, 7683 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 20:43:45,333 INFO L231 Difference]: Finished difference. Result has 352 places, 496 transitions, 6670 flow [2024-06-27 20:43:45,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6465, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6670, PETRI_PLACES=352, PETRI_TRANSITIONS=496} [2024-06-27 20:43:45,334 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 311 predicate places. [2024-06-27 20:43:45,334 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 496 transitions, 6670 flow [2024-06-27 20:43:45,334 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 20:43:45,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:45,334 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 20:43:45,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 20:43:45,334 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 20:43:45,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:45,335 INFO L85 PathProgramCache]: Analyzing trace with hash -888726070, now seen corresponding path program 3 times [2024-06-27 20:43:45,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:45,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658307591] [2024-06-27 20:43:45,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:45,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:45,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:45,976 INFO 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 20:43:45,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:45,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658307591] [2024-06-27 20:43:45,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658307591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:45,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:45,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:43:45,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337057923] [2024-06-27 20:43:45,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:45,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:43:45,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:45,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:43:45,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:43:46,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:43:46,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 496 transitions, 6670 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 20:43:46,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:46,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:43:46,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:47,045 INFO L124 PetriNetUnfolderBase]: 3198/4952 cut-off events. [2024-06-27 20:43:47,045 INFO L125 PetriNetUnfolderBase]: For 896854/896862 co-relation queries the response was YES. [2024-06-27 20:43:47,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51535 conditions, 4952 events. 3198/4952 cut-off events. For 896854/896862 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 27773 event pairs, 637 based on Foata normal form. 6/4955 useless extension candidates. Maximal degree in co-relation 51368. Up to 4738 conditions per place. [2024-06-27 20:43:47,118 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 466 selfloop transitions, 47 changer transitions 0/517 dead transitions. [2024-06-27 20:43:47,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 517 transitions, 8169 flow [2024-06-27 20:43:47,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:43:47,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:43:47,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-27 20:43:47,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37222222222222223 [2024-06-27 20:43:47,119 INFO L175 Difference]: Start difference. First operand has 352 places, 496 transitions, 6670 flow. Second operand 9 states and 134 transitions. [2024-06-27 20:43:47,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 517 transitions, 8169 flow [2024-06-27 20:43:49,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 517 transitions, 7981 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-27 20:43:49,682 INFO L231 Difference]: Finished difference. Result has 355 places, 502 transitions, 6816 flow [2024-06-27 20:43:49,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6505, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6816, PETRI_PLACES=355, PETRI_TRANSITIONS=502} [2024-06-27 20:43:49,682 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 314 predicate places. [2024-06-27 20:43:49,682 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 502 transitions, 6816 flow [2024-06-27 20:43:49,683 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 20:43:49,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:49,683 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 20:43:49,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 20:43:49,683 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 20:43:49,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:49,683 INFO L85 PathProgramCache]: Analyzing trace with hash -897303708, now seen corresponding path program 3 times [2024-06-27 20:43:49,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:49,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305308109] [2024-06-27 20:43:49,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:49,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:49,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:50,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:50,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:50,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305308109] [2024-06-27 20:43:50,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305308109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:50,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:50,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:43:50,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384984103] [2024-06-27 20:43:50,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:50,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:43:50,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:50,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:43:50,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:43:50,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:43:50,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 502 transitions, 6816 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 20:43:50,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:50,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:43:50,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:51,404 INFO L124 PetriNetUnfolderBase]: 3197/4952 cut-off events. [2024-06-27 20:43:51,404 INFO L125 PetriNetUnfolderBase]: For 897574/897579 co-relation queries the response was YES. [2024-06-27 20:43:51,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51227 conditions, 4952 events. 3197/4952 cut-off events. For 897574/897579 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 27818 event pairs, 640 based on Foata normal form. 2/4950 useless extension candidates. Maximal degree in co-relation 51058. Up to 4699 conditions per place. [2024-06-27 20:43:51,478 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 457 selfloop transitions, 59 changer transitions 0/520 dead transitions. [2024-06-27 20:43:51,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 520 transitions, 7941 flow [2024-06-27 20:43:51,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:43:51,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:43:51,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 20:43:51,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403125 [2024-06-27 20:43:51,479 INFO L175 Difference]: Start difference. First operand has 355 places, 502 transitions, 6816 flow. Second operand 8 states and 129 transitions. [2024-06-27 20:43:51,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 520 transitions, 7941 flow [2024-06-27 20:43:54,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 520 transitions, 7753 flow, removed 69 selfloop flow, removed 5 redundant places. [2024-06-27 20:43:54,282 INFO L231 Difference]: Finished difference. Result has 358 places, 505 transitions, 6801 flow [2024-06-27 20:43:54,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6631, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6801, PETRI_PLACES=358, PETRI_TRANSITIONS=505} [2024-06-27 20:43:54,282 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 317 predicate places. [2024-06-27 20:43:54,282 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 505 transitions, 6801 flow [2024-06-27 20:43:54,283 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 20:43:54,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:54,283 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 20:43:54,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 20:43:54,283 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 20:43:54,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:54,283 INFO L85 PathProgramCache]: Analyzing trace with hash -889022740, now seen corresponding path program 4 times [2024-06-27 20:43:54,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:54,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125436269] [2024-06-27 20:43:54,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:54,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:54,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:54,918 INFO 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 20:43:54,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:54,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125436269] [2024-06-27 20:43:54,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125436269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:54,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:54,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:43:54,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539736767] [2024-06-27 20:43:54,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:54,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:43:54,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:54,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:43:54,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:43:54,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:43:54,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 505 transitions, 6801 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 20:43:54,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:54,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:43:54,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:56,156 INFO L124 PetriNetUnfolderBase]: 3192/4944 cut-off events. [2024-06-27 20:43:56,156 INFO L125 PetriNetUnfolderBase]: For 897671/897679 co-relation queries the response was YES. [2024-06-27 20:43:56,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50936 conditions, 4944 events. 3192/4944 cut-off events. For 897671/897679 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 27721 event pairs, 644 based on Foata normal form. 6/4947 useless extension candidates. Maximal degree in co-relation 50765. Up to 4756 conditions per place. [2024-06-27 20:43:56,224 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 471 selfloop transitions, 44 changer transitions 0/519 dead transitions. [2024-06-27 20:43:56,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 519 transitions, 7867 flow [2024-06-27 20:43:56,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:43:56,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:43:56,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 144 transitions. [2024-06-27 20:43:56,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36 [2024-06-27 20:43:56,226 INFO L175 Difference]: Start difference. First operand has 358 places, 505 transitions, 6801 flow. Second operand 10 states and 144 transitions. [2024-06-27 20:43:56,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 519 transitions, 7867 flow [2024-06-27 20:43:59,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 519 transitions, 7475 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-27 20:43:59,473 INFO L231 Difference]: Finished difference. Result has 360 places, 505 transitions, 6503 flow [2024-06-27 20:43:59,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6409, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6503, PETRI_PLACES=360, PETRI_TRANSITIONS=505} [2024-06-27 20:43:59,474 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 319 predicate places. [2024-06-27 20:43:59,474 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 505 transitions, 6503 flow [2024-06-27 20:43:59,474 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 20:43:59,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:59,474 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 20:43:59,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 20:43:59,474 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 20:43:59,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:59,475 INFO L85 PathProgramCache]: Analyzing trace with hash 875436692, now seen corresponding path program 1 times [2024-06-27 20:43:59,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:59,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005210746] [2024-06-27 20:43:59,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:59,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:59,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:00,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:00,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:00,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005210746] [2024-06-27 20:44:00,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005210746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:00,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:00,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:44:00,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057514067] [2024-06-27 20:44:00,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:00,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:44:00,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:00,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:44:00,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:44:00,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:44:00,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 505 transitions, 6503 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 20:44:00,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:00,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:44:00,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:01,163 INFO L124 PetriNetUnfolderBase]: 3208/4972 cut-off events. [2024-06-27 20:44:01,163 INFO L125 PetriNetUnfolderBase]: For 922779/922789 co-relation queries the response was YES. [2024-06-27 20:44:01,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50987 conditions, 4972 events. 3208/4972 cut-off events. For 922779/922789 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 27882 event pairs, 453 based on Foata normal form. 12/4981 useless extension candidates. Maximal degree in co-relation 50816. Up to 4607 conditions per place. [2024-06-27 20:44:01,241 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 495 selfloop transitions, 40 changer transitions 0/539 dead transitions. [2024-06-27 20:44:01,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 539 transitions, 7837 flow [2024-06-27 20:44:01,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:44:01,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:44:01,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 20:44:01,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 20:44:01,243 INFO L175 Difference]: Start difference. First operand has 360 places, 505 transitions, 6503 flow. Second operand 9 states and 150 transitions. [2024-06-27 20:44:01,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 539 transitions, 7837 flow [2024-06-27 20:44:05,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 539 transitions, 7743 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 20:44:05,044 INFO L231 Difference]: Finished difference. Result has 361 places, 508 transitions, 6667 flow [2024-06-27 20:44:05,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6409, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6667, PETRI_PLACES=361, PETRI_TRANSITIONS=508} [2024-06-27 20:44:05,044 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 320 predicate places. [2024-06-27 20:44:05,044 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 508 transitions, 6667 flow [2024-06-27 20:44:05,045 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 20:44:05,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:05,045 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 20:44:05,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 20:44:05,045 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 20:44:05,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:05,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1141133972, now seen corresponding path program 2 times [2024-06-27 20:44:05,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:05,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121570808] [2024-06-27 20:44:05,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:05,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:05,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:05,558 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 20:44:05,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:05,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121570808] [2024-06-27 20:44:05,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121570808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:05,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:05,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:44:05,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732015143] [2024-06-27 20:44:05,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:05,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:44:05,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:05,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:44:05,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:44:05,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:44:05,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 508 transitions, 6667 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 20:44:05,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:05,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:44:05,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:06,828 INFO L124 PetriNetUnfolderBase]: 3250/5032 cut-off events. [2024-06-27 20:44:06,828 INFO L125 PetriNetUnfolderBase]: For 975491/975501 co-relation queries the response was YES. [2024-06-27 20:44:06,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52990 conditions, 5032 events. 3250/5032 cut-off events. For 975491/975501 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 28278 event pairs, 588 based on Foata normal form. 12/5041 useless extension candidates. Maximal degree in co-relation 52818. Up to 4698 conditions per place. [2024-06-27 20:44:06,911 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 491 selfloop transitions, 47 changer transitions 0/542 dead transitions. [2024-06-27 20:44:06,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 542 transitions, 8403 flow [2024-06-27 20:44:06,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:44:06,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:44:06,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 20:44:06,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 20:44:06,913 INFO L175 Difference]: Start difference. First operand has 361 places, 508 transitions, 6667 flow. Second operand 9 states and 150 transitions. [2024-06-27 20:44:06,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 542 transitions, 8403 flow [2024-06-27 20:44:10,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 542 transitions, 8167 flow, removed 80 selfloop flow, removed 7 redundant places. [2024-06-27 20:44:10,631 INFO L231 Difference]: Finished difference. Result has 363 places, 514 transitions, 6881 flow [2024-06-27 20:44:10,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6431, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6881, PETRI_PLACES=363, PETRI_TRANSITIONS=514} [2024-06-27 20:44:10,631 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 322 predicate places. [2024-06-27 20:44:10,632 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 514 transitions, 6881 flow [2024-06-27 20:44:10,632 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 20:44:10,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:10,632 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 20:44:10,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 20:44:10,632 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 20:44:10,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:10,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1141460402, now seen corresponding path program 3 times [2024-06-27 20:44:10,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:10,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154364087] [2024-06-27 20:44:10,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:10,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:10,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:11,220 INFO 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 20:44:11,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:11,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154364087] [2024-06-27 20:44:11,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154364087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:11,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:11,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:44:11,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089060939] [2024-06-27 20:44:11,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:11,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:44:11,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:11,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:44:11,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:44:11,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:44:11,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 514 transitions, 6881 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 20:44:11,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:11,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:44:11,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:12,408 INFO L124 PetriNetUnfolderBase]: 3240/5018 cut-off events. [2024-06-27 20:44:12,409 INFO L125 PetriNetUnfolderBase]: For 966462/966472 co-relation queries the response was YES. [2024-06-27 20:44:12,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52211 conditions, 5018 events. 3240/5018 cut-off events. For 966462/966472 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 28231 event pairs, 590 based on Foata normal form. 12/5027 useless extension candidates. Maximal degree in co-relation 52038. Up to 4718 conditions per place. [2024-06-27 20:44:12,486 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 494 selfloop transitions, 42 changer transitions 0/540 dead transitions. [2024-06-27 20:44:12,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 540 transitions, 8037 flow [2024-06-27 20:44:12,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:44:12,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:44:12,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-27 20:44:12,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-27 20:44:12,487 INFO L175 Difference]: Start difference. First operand has 363 places, 514 transitions, 6881 flow. Second operand 9 states and 147 transitions. [2024-06-27 20:44:12,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 540 transitions, 8037 flow [2024-06-27 20:44:15,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 540 transitions, 7660 flow, removed 164 selfloop flow, removed 5 redundant places. [2024-06-27 20:44:15,981 INFO L231 Difference]: Finished difference. Result has 367 places, 514 transitions, 6594 flow [2024-06-27 20:44:15,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6504, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6594, PETRI_PLACES=367, PETRI_TRANSITIONS=514} [2024-06-27 20:44:15,982 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 326 predicate places. [2024-06-27 20:44:15,982 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 514 transitions, 6594 flow [2024-06-27 20:44:15,982 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 20:44:15,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:15,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:15,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 20:44:15,983 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 20:44:15,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:15,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1141472306, now seen corresponding path program 1 times [2024-06-27 20:44:15,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:15,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458125384] [2024-06-27 20:44:15,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:15,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:15,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:16,689 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 20:44:16,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:16,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458125384] [2024-06-27 20:44:16,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458125384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:16,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:16,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:44:16,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538679156] [2024-06-27 20:44:16,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:16,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:44:16,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:16,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:44:16,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:44:16,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:44:16,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 514 transitions, 6594 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 20:44:16,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:16,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:44:16,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:18,010 INFO L124 PetriNetUnfolderBase]: 3296/5106 cut-off events. [2024-06-27 20:44:18,011 INFO L125 PetriNetUnfolderBase]: For 1067203/1067213 co-relation queries the response was YES. [2024-06-27 20:44:18,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53147 conditions, 5106 events. 3296/5106 cut-off events. For 1067203/1067213 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 28872 event pairs, 602 based on Foata normal form. 24/5127 useless extension candidates. Maximal degree in co-relation 52972. Up to 4728 conditions per place. [2024-06-27 20:44:18,091 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 497 selfloop transitions, 47 changer transitions 0/548 dead transitions. [2024-06-27 20:44:18,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 548 transitions, 7978 flow [2024-06-27 20:44:18,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:44:18,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:44:18,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-27 20:44:18,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4075 [2024-06-27 20:44:18,092 INFO L175 Difference]: Start difference. First operand has 367 places, 514 transitions, 6594 flow. Second operand 10 states and 163 transitions. [2024-06-27 20:44:18,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 548 transitions, 7978 flow [2024-06-27 20:44:22,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 548 transitions, 7886 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 20:44:22,070 INFO L231 Difference]: Finished difference. Result has 370 places, 518 transitions, 6770 flow [2024-06-27 20:44:22,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6502, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6770, PETRI_PLACES=370, PETRI_TRANSITIONS=518} [2024-06-27 20:44:22,071 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 329 predicate places. [2024-06-27 20:44:22,071 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 518 transitions, 6770 flow [2024-06-27 20:44:22,071 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 20:44:22,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:22,071 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 20:44:22,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 20:44:22,072 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 20:44:22,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:22,072 INFO L85 PathProgramCache]: Analyzing trace with hash 210178860, now seen corresponding path program 1 times [2024-06-27 20:44:22,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:22,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661699672] [2024-06-27 20:44:22,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:22,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:22,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:22,535 INFO 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 20:44:22,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:22,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661699672] [2024-06-27 20:44:22,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661699672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:22,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:22,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:44:22,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776961650] [2024-06-27 20:44:22,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:22,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:44:22,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:22,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:44:22,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:44:22,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:44:22,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 518 transitions, 6770 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 20:44:22,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:22,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:44:22,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:23,900 INFO L124 PetriNetUnfolderBase]: 3306/5124 cut-off events. [2024-06-27 20:44:23,901 INFO L125 PetriNetUnfolderBase]: For 994378/994385 co-relation queries the response was YES. [2024-06-27 20:44:23,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53575 conditions, 5124 events. 3306/5124 cut-off events. For 994378/994385 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 28978 event pairs, 594 based on Foata normal form. 6/5126 useless extension candidates. Maximal degree in co-relation 53398. Up to 4532 conditions per place. [2024-06-27 20:44:23,972 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 458 selfloop transitions, 93 changer transitions 0/555 dead transitions. [2024-06-27 20:44:23,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 555 transitions, 8100 flow [2024-06-27 20:44:23,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:44:23,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:44:23,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 20:44:23,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-06-27 20:44:23,973 INFO L175 Difference]: Start difference. First operand has 370 places, 518 transitions, 6770 flow. Second operand 8 states and 142 transitions. [2024-06-27 20:44:23,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 555 transitions, 8100 flow [2024-06-27 20:44:27,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 555 transitions, 7928 flow, removed 43 selfloop flow, removed 8 redundant places. [2024-06-27 20:44:27,496 INFO L231 Difference]: Finished difference. Result has 371 places, 526 transitions, 6931 flow [2024-06-27 20:44:27,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6598, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6931, PETRI_PLACES=371, PETRI_TRANSITIONS=526} [2024-06-27 20:44:27,496 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 330 predicate places. [2024-06-27 20:44:27,496 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 526 transitions, 6931 flow [2024-06-27 20:44:27,496 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 20:44:27,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:27,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:27,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 20:44:27,497 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 20:44:27,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:27,497 INFO L85 PathProgramCache]: Analyzing trace with hash 210298830, now seen corresponding path program 2 times [2024-06-27 20:44:27,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:27,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936992397] [2024-06-27 20:44:27,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:27,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:27,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:27,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:27,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:27,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936992397] [2024-06-27 20:44:27,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936992397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:27,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:27,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:44:27,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158163432] [2024-06-27 20:44:27,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:27,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:44:27,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:27,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:44:27,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:44:28,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:44:28,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 526 transitions, 6931 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 20:44:28,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:28,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:44:28,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:29,289 INFO L124 PetriNetUnfolderBase]: 3316/5146 cut-off events. [2024-06-27 20:44:29,289 INFO L125 PetriNetUnfolderBase]: For 980304/980311 co-relation queries the response was YES. [2024-06-27 20:44:29,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53551 conditions, 5146 events. 3316/5146 cut-off events. For 980304/980311 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 29161 event pairs, 589 based on Foata normal form. 6/5148 useless extension candidates. Maximal degree in co-relation 53373. Up to 4503 conditions per place. [2024-06-27 20:44:29,385 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 451 selfloop transitions, 101 changer transitions 0/556 dead transitions. [2024-06-27 20:44:29,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 556 transitions, 8431 flow [2024-06-27 20:44:29,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:44:29,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:44:29,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 20:44:29,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446875 [2024-06-27 20:44:29,386 INFO L175 Difference]: Start difference. First operand has 371 places, 526 transitions, 6931 flow. Second operand 8 states and 143 transitions. [2024-06-27 20:44:29,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 556 transitions, 8431 flow [2024-06-27 20:44:33,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 556 transitions, 8266 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 20:44:33,353 INFO L231 Difference]: Finished difference. Result has 375 places, 529 transitions, 7036 flow [2024-06-27 20:44:33,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6766, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7036, PETRI_PLACES=375, PETRI_TRANSITIONS=529} [2024-06-27 20:44:33,354 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 334 predicate places. [2024-06-27 20:44:33,354 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 529 transitions, 7036 flow [2024-06-27 20:44:33,354 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 20:44:33,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:33,354 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 20:44:33,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 20:44:33,354 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 20:44:33,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:33,355 INFO L85 PathProgramCache]: Analyzing trace with hash 248395906, now seen corresponding path program 3 times [2024-06-27 20:44:33,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:33,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368470056] [2024-06-27 20:44:33,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:33,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:33,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:33,829 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 20:44:33,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:33,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368470056] [2024-06-27 20:44:33,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368470056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:33,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:33,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:44:33,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002222934] [2024-06-27 20:44:33,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:33,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:44:33,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:33,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:44:33,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:44:33,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:44:33,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 529 transitions, 7036 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 20:44:33,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:33,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:44:33,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:35,139 INFO L124 PetriNetUnfolderBase]: 3326/5147 cut-off events. [2024-06-27 20:44:35,139 INFO L125 PetriNetUnfolderBase]: For 997321/997326 co-relation queries the response was YES. [2024-06-27 20:44:35,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53903 conditions, 5147 events. 3326/5147 cut-off events. For 997321/997326 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 29103 event pairs, 604 based on Foata normal form. 2/5145 useless extension candidates. Maximal degree in co-relation 53724. Up to 4560 conditions per place. [2024-06-27 20:44:35,222 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 467 selfloop transitions, 92 changer transitions 0/563 dead transitions. [2024-06-27 20:44:35,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 563 transitions, 8400 flow [2024-06-27 20:44:35,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:44:35,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:44:35,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 20:44:35,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-27 20:44:35,224 INFO L175 Difference]: Start difference. First operand has 375 places, 529 transitions, 7036 flow. Second operand 8 states and 137 transitions. [2024-06-27 20:44:35,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 563 transitions, 8400 flow [2024-06-27 20:44:38,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 563 transitions, 8156 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 20:44:38,243 INFO L231 Difference]: Finished difference. Result has 378 places, 537 transitions, 7151 flow [2024-06-27 20:44:38,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6806, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7151, PETRI_PLACES=378, PETRI_TRANSITIONS=537} [2024-06-27 20:44:38,244 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 337 predicate places. [2024-06-27 20:44:38,244 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 537 transitions, 7151 flow [2024-06-27 20:44:38,244 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 20:44:38,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:38,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:38,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 20:44:38,245 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 20:44:38,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:38,245 INFO L85 PathProgramCache]: Analyzing trace with hash 248690933, now seen corresponding path program 1 times [2024-06-27 20:44:38,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:38,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302153784] [2024-06-27 20:44:38,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:38,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:38,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:38,971 INFO 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 20:44:38,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:38,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302153784] [2024-06-27 20:44:38,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302153784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:38,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:38,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:44:38,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819218944] [2024-06-27 20:44:38,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:38,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:44:38,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:38,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:44:38,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:44:39,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:44:39,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 537 transitions, 7151 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 20:44:39,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:39,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:44:39,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:40,431 INFO L124 PetriNetUnfolderBase]: 3447/5320 cut-off events. [2024-06-27 20:44:40,432 INFO L125 PetriNetUnfolderBase]: For 1019753/1019758 co-relation queries the response was YES. [2024-06-27 20:44:40,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56079 conditions, 5320 events. 3447/5320 cut-off events. For 1019753/1019758 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 30104 event pairs, 591 based on Foata normal form. 4/5316 useless extension candidates. Maximal degree in co-relation 55898. Up to 4641 conditions per place. [2024-06-27 20:44:40,521 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 476 selfloop transitions, 121 changer transitions 0/601 dead transitions. [2024-06-27 20:44:40,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 601 transitions, 9198 flow [2024-06-27 20:44:40,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:44:40,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:44:40,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-27 20:44:40,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-27 20:44:40,522 INFO L175 Difference]: Start difference. First operand has 378 places, 537 transitions, 7151 flow. Second operand 9 states and 151 transitions. [2024-06-27 20:44:40,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 601 transitions, 9198 flow [2024-06-27 20:44:45,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 601 transitions, 9018 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 20:44:45,197 INFO L231 Difference]: Finished difference. Result has 388 places, 574 transitions, 8114 flow [2024-06-27 20:44:45,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7007, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8114, PETRI_PLACES=388, PETRI_TRANSITIONS=574} [2024-06-27 20:44:45,197 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 347 predicate places. [2024-06-27 20:44:45,198 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 574 transitions, 8114 flow [2024-06-27 20:44:45,198 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 20:44:45,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:45,198 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 20:44:45,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 20:44:45,198 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 20:44:45,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:45,199 INFO L85 PathProgramCache]: Analyzing trace with hash 215840142, now seen corresponding path program 1 times [2024-06-27 20:44:45,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:45,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108086264] [2024-06-27 20:44:45,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:45,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:45,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:45,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:45,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:45,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108086264] [2024-06-27 20:44:45,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108086264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:45,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:45,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:44:45,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815392788] [2024-06-27 20:44:45,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:45,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:44:45,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:45,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:44:45,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:44:45,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:44:45,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 574 transitions, 8114 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 20:44:45,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:45,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:44:45,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:47,096 INFO L124 PetriNetUnfolderBase]: 3467/5344 cut-off events. [2024-06-27 20:44:47,097 INFO L125 PetriNetUnfolderBase]: For 1048219/1048224 co-relation queries the response was YES. [2024-06-27 20:44:47,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57161 conditions, 5344 events. 3467/5344 cut-off events. For 1048219/1048224 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 30196 event pairs, 580 based on Foata normal form. 4/5344 useless extension candidates. Maximal degree in co-relation 56974. Up to 4647 conditions per place. [2024-06-27 20:44:47,191 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 470 selfloop transitions, 131 changer transitions 0/605 dead transitions. [2024-06-27 20:44:47,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 605 transitions, 9562 flow [2024-06-27 20:44:47,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:44:47,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:44:47,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 20:44:47,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-27 20:44:47,192 INFO L175 Difference]: Start difference. First operand has 388 places, 574 transitions, 8114 flow. Second operand 9 states and 154 transitions. [2024-06-27 20:44:47,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 605 transitions, 9562 flow [2024-06-27 20:44:51,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 605 transitions, 9361 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-27 20:44:51,982 INFO L231 Difference]: Finished difference. Result has 393 places, 578 transitions, 8331 flow [2024-06-27 20:44:51,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7913, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8331, PETRI_PLACES=393, PETRI_TRANSITIONS=578} [2024-06-27 20:44:51,983 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 352 predicate places. [2024-06-27 20:44:51,983 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 578 transitions, 8331 flow [2024-06-27 20:44:51,983 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 20:44:51,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:51,983 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 20:44:51,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 20:44:51,984 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 20:44:51,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:51,984 INFO L85 PathProgramCache]: Analyzing trace with hash 248694436, now seen corresponding path program 4 times [2024-06-27 20:44:51,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:51,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784772502] [2024-06-27 20:44:51,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:51,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:51,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:52,475 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 20:44:52,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:52,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784772502] [2024-06-27 20:44:52,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784772502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:52,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:52,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:44:52,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520886800] [2024-06-27 20:44:52,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:52,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:44:52,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:52,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:44:52,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:44:52,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:44:52,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 578 transitions, 8331 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 20:44:52,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:52,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:44:52,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:53,832 INFO L124 PetriNetUnfolderBase]: 3477/5381 cut-off events. [2024-06-27 20:44:53,832 INFO L125 PetriNetUnfolderBase]: For 1056933/1056938 co-relation queries the response was YES. [2024-06-27 20:44:53,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57677 conditions, 5381 events. 3477/5381 cut-off events. For 1056933/1056938 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 30636 event pairs, 593 based on Foata normal form. 2/5379 useless extension candidates. Maximal degree in co-relation 57488. Up to 4641 conditions per place. [2024-06-27 20:44:53,918 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 470 selfloop transitions, 129 changer transitions 0/603 dead transitions. [2024-06-27 20:44:53,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 603 transitions, 9693 flow [2024-06-27 20:44:53,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:44:53,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:44:53,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 20:44:53,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 20:44:53,919 INFO L175 Difference]: Start difference. First operand has 393 places, 578 transitions, 8331 flow. Second operand 8 states and 136 transitions. [2024-06-27 20:44:53,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 603 transitions, 9693 flow [2024-06-27 20:44:58,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 603 transitions, 9315 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-27 20:44:58,512 INFO L231 Difference]: Finished difference. Result has 394 places, 581 transitions, 8301 flow [2024-06-27 20:44:58,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7953, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8301, PETRI_PLACES=394, PETRI_TRANSITIONS=581} [2024-06-27 20:44:58,513 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 353 predicate places. [2024-06-27 20:44:58,513 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 581 transitions, 8301 flow [2024-06-27 20:44:58,513 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 20:44:58,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:58,513 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 20:44:58,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 20:44:58,514 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 20:44:58,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:58,514 INFO L85 PathProgramCache]: Analyzing trace with hash 252407926, now seen corresponding path program 5 times [2024-06-27 20:44:58,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:58,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721560709] [2024-06-27 20:44:58,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:58,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:58,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:58,972 INFO 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 20:44:58,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:58,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721560709] [2024-06-27 20:44:58,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721560709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:58,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:58,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:44:58,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195981980] [2024-06-27 20:44:58,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:58,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:44:58,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:58,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:44:58,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:44:59,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:44:59,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 581 transitions, 8301 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 20:44:59,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:59,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:44:59,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:00,378 INFO L124 PetriNetUnfolderBase]: 3487/5396 cut-off events. [2024-06-27 20:45:00,378 INFO L125 PetriNetUnfolderBase]: For 1073680/1073685 co-relation queries the response was YES. [2024-06-27 20:45:00,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57725 conditions, 5396 events. 3487/5396 cut-off events. For 1073680/1073685 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 30707 event pairs, 622 based on Foata normal form. 2/5394 useless extension candidates. Maximal degree in co-relation 57535. Up to 4453 conditions per place. [2024-06-27 20:45:00,460 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 428 selfloop transitions, 173 changer transitions 0/605 dead transitions. [2024-06-27 20:45:00,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 605 transitions, 10159 flow [2024-06-27 20:45:00,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:45:00,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:45:00,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 20:45:00,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-27 20:45:00,462 INFO L175 Difference]: Start difference. First operand has 394 places, 581 transitions, 8301 flow. Second operand 8 states and 139 transitions. [2024-06-27 20:45:00,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 605 transitions, 10159 flow [2024-06-27 20:45:05,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 605 transitions, 9853 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-27 20:45:05,151 INFO L231 Difference]: Finished difference. Result has 396 places, 584 transitions, 8429 flow [2024-06-27 20:45:05,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7995, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8429, PETRI_PLACES=396, PETRI_TRANSITIONS=584} [2024-06-27 20:45:05,152 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 355 predicate places. [2024-06-27 20:45:05,152 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 584 transitions, 8429 flow [2024-06-27 20:45:05,152 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 20:45:05,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:05,152 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 20:45:05,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 20:45:05,152 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 20:45:05,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:05,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1216373043, now seen corresponding path program 1 times [2024-06-27 20:45:05,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:05,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903427227] [2024-06-27 20:45:05,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:05,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:05,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:05,837 INFO 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 20:45:05,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:05,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903427227] [2024-06-27 20:45:05,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903427227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:05,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:05,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:45:05,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991907408] [2024-06-27 20:45:05,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:05,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:45:05,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:05,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:45:05,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:45:05,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:45:05,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 584 transitions, 8429 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 20:45:05,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:05,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:45:05,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:07,346 INFO L124 PetriNetUnfolderBase]: 3497/5397 cut-off events. [2024-06-27 20:45:07,347 INFO L125 PetriNetUnfolderBase]: For 1090252/1090260 co-relation queries the response was YES. [2024-06-27 20:45:07,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58023 conditions, 5397 events. 3497/5397 cut-off events. For 1090252/1090260 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 30657 event pairs, 550 based on Foata normal form. 6/5400 useless extension candidates. Maximal degree in co-relation 57832. Up to 5066 conditions per place. [2024-06-27 20:45:07,428 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 551 selfloop transitions, 54 changer transitions 0/609 dead transitions. [2024-06-27 20:45:07,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 609 transitions, 9808 flow [2024-06-27 20:45:07,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:45:07,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:45:07,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-27 20:45:07,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 20:45:07,429 INFO L175 Difference]: Start difference. First operand has 396 places, 584 transitions, 8429 flow. Second operand 9 states and 144 transitions. [2024-06-27 20:45:07,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 609 transitions, 9808 flow [2024-06-27 20:45:11,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 609 transitions, 9185 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-27 20:45:11,672 INFO L231 Difference]: Finished difference. Result has 397 places, 588 transitions, 8032 flow [2024-06-27 20:45:11,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7806, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8032, PETRI_PLACES=397, PETRI_TRANSITIONS=588} [2024-06-27 20:45:11,672 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 356 predicate places. [2024-06-27 20:45:11,672 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 588 transitions, 8032 flow [2024-06-27 20:45:11,673 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 20:45:11,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:11,673 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 20:45:11,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 20:45:11,673 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 20:45:11,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:11,673 INFO L85 PathProgramCache]: Analyzing trace with hash 281119598, now seen corresponding path program 2 times [2024-06-27 20:45:11,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:11,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770385948] [2024-06-27 20:45:11,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:11,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:11,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:12,241 INFO 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 20:45:12,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:12,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770385948] [2024-06-27 20:45:12,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770385948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:12,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:12,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:45:12,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400622723] [2024-06-27 20:45:12,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:12,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:45:12,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:12,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:45:12,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:45:12,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:45:12,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 588 transitions, 8032 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 20:45:12,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:12,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:45:12,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:13,836 INFO L124 PetriNetUnfolderBase]: 3601/5534 cut-off events. [2024-06-27 20:45:13,836 INFO L125 PetriNetUnfolderBase]: For 1213798/1213803 co-relation queries the response was YES. [2024-06-27 20:45:13,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60025 conditions, 5534 events. 3601/5534 cut-off events. For 1213798/1213803 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 31285 event pairs, 594 based on Foata normal form. 8/5538 useless extension candidates. Maximal degree in co-relation 59835. Up to 4671 conditions per place. [2024-06-27 20:45:13,918 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 463 selfloop transitions, 162 changer transitions 0/629 dead transitions. [2024-06-27 20:45:13,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 629 transitions, 10351 flow [2024-06-27 20:45:13,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:45:13,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:45:13,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 20:45:13,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-27 20:45:13,919 INFO L175 Difference]: Start difference. First operand has 397 places, 588 transitions, 8032 flow. Second operand 9 states and 159 transitions. [2024-06-27 20:45:13,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 629 transitions, 10351 flow [2024-06-27 20:45:18,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 629 transitions, 10166 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-27 20:45:18,817 INFO L231 Difference]: Finished difference. Result has 400 places, 602 transitions, 8661 flow [2024-06-27 20:45:18,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7847, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8661, PETRI_PLACES=400, PETRI_TRANSITIONS=602} [2024-06-27 20:45:18,818 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 359 predicate places. [2024-06-27 20:45:18,818 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 602 transitions, 8661 flow [2024-06-27 20:45:18,818 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 20:45:18,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:18,819 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 20:45:18,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 20:45:18,819 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 20:45:18,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:18,819 INFO L85 PathProgramCache]: Analyzing trace with hash 219558840, now seen corresponding path program 6 times [2024-06-27 20:45:18,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:18,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459018319] [2024-06-27 20:45:18,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:18,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:18,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:19,328 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 20:45:19,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:19,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459018319] [2024-06-27 20:45:19,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459018319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:19,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:19,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:45:19,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014817823] [2024-06-27 20:45:19,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:19,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:45:19,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:19,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:45:19,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:45:19,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:45:19,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 602 transitions, 8661 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 20:45:19,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:19,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:45:19,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:20,895 INFO L124 PetriNetUnfolderBase]: 3611/5562 cut-off events. [2024-06-27 20:45:20,895 INFO L125 PetriNetUnfolderBase]: For 1198418/1198423 co-relation queries the response was YES. [2024-06-27 20:45:20,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61294 conditions, 5562 events. 3611/5562 cut-off events. For 1198418/1198423 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 31567 event pairs, 634 based on Foata normal form. 2/5560 useless extension candidates. Maximal degree in co-relation 61102. Up to 4621 conditions per place. [2024-06-27 20:45:20,976 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 453 selfloop transitions, 168 changer transitions 0/625 dead transitions. [2024-06-27 20:45:20,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 625 transitions, 10303 flow [2024-06-27 20:45:20,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:45:20,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:45:20,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 20:45:20,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-27 20:45:20,977 INFO L175 Difference]: Start difference. First operand has 400 places, 602 transitions, 8661 flow. Second operand 8 states and 137 transitions. [2024-06-27 20:45:20,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 625 transitions, 10303 flow [2024-06-27 20:45:26,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 625 transitions, 9910 flow, removed 111 selfloop flow, removed 5 redundant places. [2024-06-27 20:45:26,422 INFO L231 Difference]: Finished difference. Result has 403 places, 605 transitions, 8678 flow [2024-06-27 20:45:26,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8268, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8678, PETRI_PLACES=403, PETRI_TRANSITIONS=605} [2024-06-27 20:45:26,423 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 362 predicate places. [2024-06-27 20:45:26,423 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 605 transitions, 8678 flow [2024-06-27 20:45:26,423 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 20:45:26,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:26,423 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 20:45:26,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 20:45:26,423 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 20:45:26,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:26,424 INFO L85 PathProgramCache]: Analyzing trace with hash 219559212, now seen corresponding path program 3 times [2024-06-27 20:45:26,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:26,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391885519] [2024-06-27 20:45:26,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:26,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:26,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:26,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:26,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:26,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391885519] [2024-06-27 20:45:26,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391885519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:26,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:26,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:45:26,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497095460] [2024-06-27 20:45:26,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:26,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:45:26,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:26,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:45:26,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:45:27,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:45:27,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 605 transitions, 8678 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 20:45:27,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:27,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:45:27,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:28,728 INFO L124 PetriNetUnfolderBase]: 3615/5556 cut-off events. [2024-06-27 20:45:28,729 INFO L125 PetriNetUnfolderBase]: For 1206843/1206848 co-relation queries the response was YES. [2024-06-27 20:45:28,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61091 conditions, 5556 events. 3615/5556 cut-off events. For 1206843/1206848 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 31427 event pairs, 596 based on Foata normal form. 4/5556 useless extension candidates. Maximal degree in co-relation 60897. Up to 4691 conditions per place. [2024-06-27 20:45:28,815 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 469 selfloop transitions, 162 changer transitions 0/635 dead transitions. [2024-06-27 20:45:28,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 635 transitions, 10469 flow [2024-06-27 20:45:28,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:45:28,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:45:28,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 20:45:28,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-27 20:45:28,816 INFO L175 Difference]: Start difference. First operand has 403 places, 605 transitions, 8678 flow. Second operand 9 states and 159 transitions. [2024-06-27 20:45:28,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 635 transitions, 10469 flow [2024-06-27 20:45:33,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 635 transitions, 10185 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 20:45:33,378 INFO L231 Difference]: Finished difference. Result has 407 places, 609 transitions, 8864 flow [2024-06-27 20:45:33,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8394, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8864, PETRI_PLACES=407, PETRI_TRANSITIONS=609} [2024-06-27 20:45:33,379 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 366 predicate places. [2024-06-27 20:45:33,379 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 609 transitions, 8864 flow [2024-06-27 20:45:33,379 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 20:45:33,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:33,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:33,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 20:45:33,380 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 20:45:33,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:33,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1423293393, now seen corresponding path program 2 times [2024-06-27 20:45:33,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:33,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868197364] [2024-06-27 20:45:33,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:33,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:33,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:34,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:34,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:34,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868197364] [2024-06-27 20:45:34,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868197364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:34,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:34,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:45:34,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46707375] [2024-06-27 20:45:34,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:34,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:45:34,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:34,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:45:34,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:45:34,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:45:34,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 609 transitions, 8864 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 20:45:34,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:34,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:45:34,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:35,721 INFO L124 PetriNetUnfolderBase]: 3625/5589 cut-off events. [2024-06-27 20:45:35,721 INFO L125 PetriNetUnfolderBase]: For 1209282/1209290 co-relation queries the response was YES. [2024-06-27 20:45:35,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61554 conditions, 5589 events. 3625/5589 cut-off events. For 1209282/1209290 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 31850 event pairs, 580 based on Foata normal form. 6/5592 useless extension candidates. Maximal degree in co-relation 61359. Up to 5096 conditions per place. [2024-06-27 20:45:35,807 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 531 selfloop transitions, 102 changer transitions 0/637 dead transitions. [2024-06-27 20:45:35,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 637 transitions, 10653 flow [2024-06-27 20:45:35,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:45:35,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:45:35,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-27 20:45:35,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.395 [2024-06-27 20:45:35,808 INFO L175 Difference]: Start difference. First operand has 407 places, 609 transitions, 8864 flow. Second operand 10 states and 158 transitions. [2024-06-27 20:45:35,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 637 transitions, 10653 flow [2024-06-27 20:45:41,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 637 transitions, 10270 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-27 20:45:41,208 INFO L231 Difference]: Finished difference. Result has 412 places, 617 transitions, 8910 flow [2024-06-27 20:45:41,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8481, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8910, PETRI_PLACES=412, PETRI_TRANSITIONS=617} [2024-06-27 20:45:41,209 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 371 predicate places. [2024-06-27 20:45:41,209 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 617 transitions, 8910 flow [2024-06-27 20:45:41,209 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 20:45:41,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:41,209 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 20:45:41,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 20:45:41,210 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 20:45:41,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:41,210 INFO L85 PathProgramCache]: Analyzing trace with hash -387979880, now seen corresponding path program 4 times [2024-06-27 20:45:41,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:41,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784285373] [2024-06-27 20:45:41,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:41,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:41,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:41,743 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 20:45:41,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:41,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784285373] [2024-06-27 20:45:41,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784285373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:41,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:41,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:45:41,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128617169] [2024-06-27 20:45:41,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:41,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:45:41,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:41,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:45:41,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:45:41,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:45:41,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 617 transitions, 8910 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 20:45:41,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:41,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:45:41,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:43,408 INFO L124 PetriNetUnfolderBase]: 3729/5730 cut-off events. [2024-06-27 20:45:43,409 INFO L125 PetriNetUnfolderBase]: For 1335670/1335675 co-relation queries the response was YES. [2024-06-27 20:45:43,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64341 conditions, 5730 events. 3729/5730 cut-off events. For 1335670/1335675 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 32547 event pairs, 640 based on Foata normal form. 8/5734 useless extension candidates. Maximal degree in co-relation 64144. Up to 4281 conditions per place. [2024-06-27 20:45:43,498 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 417 selfloop transitions, 235 changer transitions 0/656 dead transitions. [2024-06-27 20:45:43,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 656 transitions, 11589 flow [2024-06-27 20:45:43,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:45:43,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:45:43,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 20:45:43,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:45:43,499 INFO L175 Difference]: Start difference. First operand has 412 places, 617 transitions, 8910 flow. Second operand 9 states and 160 transitions. [2024-06-27 20:45:43,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 656 transitions, 11589 flow [2024-06-27 20:45:49,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 656 transitions, 11392 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-27 20:45:49,200 INFO L231 Difference]: Finished difference. Result has 416 places, 631 transitions, 9662 flow [2024-06-27 20:45:49,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8713, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9662, PETRI_PLACES=416, PETRI_TRANSITIONS=631} [2024-06-27 20:45:49,201 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 375 predicate places. [2024-06-27 20:45:49,201 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 631 transitions, 9662 flow [2024-06-27 20:45:49,201 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 20:45:49,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:49,201 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 20:45:49,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 20:45:49,201 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 20:45:49,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:49,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1415674616, now seen corresponding path program 5 times [2024-06-27 20:45:49,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:49,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383705354] [2024-06-27 20:45:49,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:49,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:49,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:49,804 INFO 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 20:45:49,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:49,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383705354] [2024-06-27 20:45:49,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383705354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:49,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:49,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:45:49,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130341988] [2024-06-27 20:45:49,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:49,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:45:49,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:49,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:45:49,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:45:49,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:45:49,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 631 transitions, 9662 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 20:45:49,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:49,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:45:49,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:51,544 INFO L124 PetriNetUnfolderBase]: 3849/5897 cut-off events. [2024-06-27 20:45:51,545 INFO L125 PetriNetUnfolderBase]: For 1443649/1443654 co-relation queries the response was YES. [2024-06-27 20:45:51,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69510 conditions, 5897 events. 3849/5897 cut-off events. For 1443649/1443654 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 33494 event pairs, 660 based on Foata normal form. 8/5901 useless extension candidates. Maximal degree in co-relation 69310. Up to 4352 conditions per place. [2024-06-27 20:45:51,640 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 436 selfloop transitions, 233 changer transitions 0/673 dead transitions. [2024-06-27 20:45:51,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 673 transitions, 12547 flow [2024-06-27 20:45:51,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:45:51,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:45:51,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 20:45:51,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 20:45:51,642 INFO L175 Difference]: Start difference. First operand has 416 places, 631 transitions, 9662 flow. Second operand 9 states and 162 transitions. [2024-06-27 20:45:51,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 673 transitions, 12547 flow [2024-06-27 20:45:57,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 673 transitions, 12075 flow, removed 132 selfloop flow, removed 4 redundant places. [2024-06-27 20:45:57,708 INFO L231 Difference]: Finished difference. Result has 422 places, 647 transitions, 10250 flow [2024-06-27 20:45:57,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9210, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10250, PETRI_PLACES=422, PETRI_TRANSITIONS=647} [2024-06-27 20:45:57,709 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 381 predicate places. [2024-06-27 20:45:57,709 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 647 transitions, 10250 flow [2024-06-27 20:45:57,709 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 20:45:57,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:57,709 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 20:45:57,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 20:45:57,710 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 20:45:57,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:57,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1448523702, now seen corresponding path program 6 times [2024-06-27 20:45:57,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:57,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29478426] [2024-06-27 20:45:57,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:57,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:57,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:58,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:58,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:58,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29478426] [2024-06-27 20:45:58,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29478426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:58,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:58,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:45:58,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508224262] [2024-06-27 20:45:58,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:58,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:45:58,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:58,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:45:58,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:45:58,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:45:58,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 647 transitions, 10250 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 20:45:58,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:58,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:45:58,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:59,946 INFO L124 PetriNetUnfolderBase]: 3837/5883 cut-off events. [2024-06-27 20:45:59,946 INFO L125 PetriNetUnfolderBase]: For 1401454/1401459 co-relation queries the response was YES. [2024-06-27 20:46:00,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69180 conditions, 5883 events. 3837/5883 cut-off events. For 1401454/1401459 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 33395 event pairs, 650 based on Foata normal form. 4/5883 useless extension candidates. Maximal degree in co-relation 68977. Up to 4348 conditions per place. [2024-06-27 20:46:00,049 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 431 selfloop transitions, 237 changer transitions 0/672 dead transitions. [2024-06-27 20:46:00,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 672 transitions, 12326 flow [2024-06-27 20:46:00,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:46:00,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:46:00,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 20:46:00,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:46:00,051 INFO L175 Difference]: Start difference. First operand has 422 places, 647 transitions, 10250 flow. Second operand 9 states and 160 transitions. [2024-06-27 20:46:00,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 672 transitions, 12326 flow [2024-06-27 20:46:04,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 672 transitions, 11784 flow, removed 122 selfloop flow, removed 5 redundant places. [2024-06-27 20:46:04,205 INFO L231 Difference]: Finished difference. Result has 426 places, 648 transitions, 10235 flow [2024-06-27 20:46:04,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9708, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10235, PETRI_PLACES=426, PETRI_TRANSITIONS=648} [2024-06-27 20:46:04,206 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 385 predicate places. [2024-06-27 20:46:04,206 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 648 transitions, 10235 flow [2024-06-27 20:46:04,206 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 20:46:04,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:04,206 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 20:46:04,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 20:46:04,206 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 20:46:04,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:04,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1448529499, now seen corresponding path program 3 times [2024-06-27 20:46:04,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:04,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495503151] [2024-06-27 20:46:04,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:04,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:04,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:04,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:04,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:04,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495503151] [2024-06-27 20:46:04,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495503151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:04,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:04,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:46:04,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325481621] [2024-06-27 20:46:04,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:04,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:46:04,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:04,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:46:04,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:46:04,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:46:04,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 648 transitions, 10235 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 20:46:04,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:04,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:46:04,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:06,462 INFO L124 PetriNetUnfolderBase]: 3823/5860 cut-off events. [2024-06-27 20:46:06,462 INFO L125 PetriNetUnfolderBase]: For 1376372/1376380 co-relation queries the response was YES. [2024-06-27 20:46:06,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68231 conditions, 5860 events. 3823/5860 cut-off events. For 1376372/1376380 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 33330 event pairs, 602 based on Foata normal form. 6/5863 useless extension candidates. Maximal degree in co-relation 68027. Up to 5429 conditions per place. [2024-06-27 20:46:06,563 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 584 selfloop transitions, 78 changer transitions 0/666 dead transitions. [2024-06-27 20:46:06,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 666 transitions, 11658 flow [2024-06-27 20:46:06,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:46:06,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:46:06,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-27 20:46:06,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 20:46:06,565 INFO L175 Difference]: Start difference. First operand has 426 places, 648 transitions, 10235 flow. Second operand 9 states and 144 transitions. [2024-06-27 20:46:06,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 666 transitions, 11658 flow [2024-06-27 20:46:10,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 666 transitions, 11109 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-27 20:46:10,812 INFO L231 Difference]: Finished difference. Result has 429 places, 649 transitions, 9900 flow [2024-06-27 20:46:10,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9687, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9900, PETRI_PLACES=429, PETRI_TRANSITIONS=649} [2024-06-27 20:46:10,821 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 388 predicate places. [2024-06-27 20:46:10,821 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 649 transitions, 9900 flow [2024-06-27 20:46:10,821 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 20:46:10,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:10,821 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 20:46:10,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 20:46:10,822 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 20:46:10,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:10,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1445033040, now seen corresponding path program 4 times [2024-06-27 20:46:10,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:10,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897460672] [2024-06-27 20:46:10,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:10,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:10,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:11,443 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 20:46:11,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:11,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897460672] [2024-06-27 20:46:11,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897460672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:11,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:11,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:46:11,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895359243] [2024-06-27 20:46:11,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:11,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:46:11,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:11,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:46:11,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:46:11,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:46:11,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 649 transitions, 9900 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 20:46:11,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:11,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:46:11,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:13,080 INFO L124 PetriNetUnfolderBase]: 3839/5884 cut-off events. [2024-06-27 20:46:13,080 INFO L125 PetriNetUnfolderBase]: For 1421526/1421534 co-relation queries the response was YES. [2024-06-27 20:46:13,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67937 conditions, 5884 events. 3839/5884 cut-off events. For 1421526/1421534 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 33475 event pairs, 600 based on Foata normal form. 8/5889 useless extension candidates. Maximal degree in co-relation 67732. Up to 5447 conditions per place. [2024-06-27 20:46:13,188 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 587 selfloop transitions, 79 changer transitions 0/670 dead transitions. [2024-06-27 20:46:13,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 670 transitions, 11466 flow [2024-06-27 20:46:13,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:46:13,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:46:13,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-27 20:46:13,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 20:46:13,189 INFO L175 Difference]: Start difference. First operand has 429 places, 649 transitions, 9900 flow. Second operand 9 states and 144 transitions. [2024-06-27 20:46:13,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 670 transitions, 11466 flow [2024-06-27 20:46:17,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 670 transitions, 11225 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-27 20:46:17,768 INFO L231 Difference]: Finished difference. Result has 431 places, 652 transitions, 10011 flow [2024-06-27 20:46:17,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9659, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10011, PETRI_PLACES=431, PETRI_TRANSITIONS=652} [2024-06-27 20:46:17,768 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 390 predicate places. [2024-06-27 20:46:17,768 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 652 transitions, 10011 flow [2024-06-27 20:46:17,769 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 20:46:17,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:17,769 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 20:46:17,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 20:46:17,769 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 20:46:17,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:17,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1444706610, now seen corresponding path program 5 times [2024-06-27 20:46:17,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:17,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001521997] [2024-06-27 20:46:17,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:17,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:17,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:18,365 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 20:46:18,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:18,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001521997] [2024-06-27 20:46:18,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001521997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:18,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:18,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:46:18,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603597752] [2024-06-27 20:46:18,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:18,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:46:18,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:18,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:46:18,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:46:18,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:46:18,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 652 transitions, 10011 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 20:46:18,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:18,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:46:18,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:20,040 INFO L124 PetriNetUnfolderBase]: 3881/5944 cut-off events. [2024-06-27 20:46:20,041 INFO L125 PetriNetUnfolderBase]: For 1490325/1490333 co-relation queries the response was YES. [2024-06-27 20:46:20,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69895 conditions, 5944 events. 3881/5944 cut-off events. For 1490325/1490333 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 33858 event pairs, 604 based on Foata normal form. 8/5949 useless extension candidates. Maximal degree in co-relation 69689. Up to 5463 conditions per place. [2024-06-27 20:46:20,149 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 587 selfloop transitions, 87 changer transitions 0/678 dead transitions. [2024-06-27 20:46:20,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 678 transitions, 12057 flow [2024-06-27 20:46:20,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:46:20,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:46:20,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-27 20:46:20,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40555555555555556 [2024-06-27 20:46:20,150 INFO L175 Difference]: Start difference. First operand has 431 places, 652 transitions, 10011 flow. Second operand 9 states and 146 transitions. [2024-06-27 20:46:20,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 678 transitions, 12057 flow [2024-06-27 20:46:24,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 678 transitions, 11727 flow, removed 88 selfloop flow, removed 7 redundant places. [2024-06-27 20:46:24,814 INFO L231 Difference]: Finished difference. Result has 433 places, 658 transitions, 10243 flow [2024-06-27 20:46:24,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9681, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10243, PETRI_PLACES=433, PETRI_TRANSITIONS=658} [2024-06-27 20:46:24,815 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 392 predicate places. [2024-06-27 20:46:24,815 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 658 transitions, 10243 flow [2024-06-27 20:46:24,815 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 20:46:24,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:24,815 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 20:46:24,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 20:46:24,816 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 20:46:24,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:24,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1455757800, now seen corresponding path program 6 times [2024-06-27 20:46:24,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:24,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423044899] [2024-06-27 20:46:24,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:24,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:24,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:25,362 INFO 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 20:46:25,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:25,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423044899] [2024-06-27 20:46:25,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423044899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:25,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:25,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:46:25,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064587366] [2024-06-27 20:46:25,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:25,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:46:25,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:25,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:46:25,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:46:25,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:46:25,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 658 transitions, 10243 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 20:46:25,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:25,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:46:25,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:26,980 INFO L124 PetriNetUnfolderBase]: 3871/5934 cut-off events. [2024-06-27 20:46:26,980 INFO L125 PetriNetUnfolderBase]: For 1471963/1471971 co-relation queries the response was YES. [2024-06-27 20:46:27,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69033 conditions, 5934 events. 3871/5934 cut-off events. For 1471963/1471971 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 33869 event pairs, 604 based on Foata normal form. 8/5939 useless extension candidates. Maximal degree in co-relation 68826. Up to 5495 conditions per place. [2024-06-27 20:46:27,089 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 594 selfloop transitions, 78 changer transitions 0/676 dead transitions. [2024-06-27 20:46:27,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 676 transitions, 11639 flow [2024-06-27 20:46:27,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:46:27,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:46:27,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-27 20:46:27,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3972222222222222 [2024-06-27 20:46:27,090 INFO L175 Difference]: Start difference. First operand has 433 places, 658 transitions, 10243 flow. Second operand 9 states and 143 transitions. [2024-06-27 20:46:27,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 676 transitions, 11639 flow [2024-06-27 20:46:31,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 676 transitions, 11182 flow, removed 177 selfloop flow, removed 5 redundant places. [2024-06-27 20:46:31,867 INFO L231 Difference]: Finished difference. Result has 437 places, 658 transitions, 9948 flow [2024-06-27 20:46:31,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9786, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9948, PETRI_PLACES=437, PETRI_TRANSITIONS=658} [2024-06-27 20:46:31,868 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 396 predicate places. [2024-06-27 20:46:31,868 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 658 transitions, 9948 flow [2024-06-27 20:46:31,868 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 20:46:31,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:31,869 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 20:46:31,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 20:46:31,869 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 20:46:31,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:31,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1456157514, now seen corresponding path program 2 times [2024-06-27 20:46:31,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:31,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460072283] [2024-06-27 20:46:31,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:31,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:31,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:32,649 INFO 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 20:46:32,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:32,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460072283] [2024-06-27 20:46:32,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460072283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:32,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:32,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:46:32,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606191134] [2024-06-27 20:46:32,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:32,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:46:32,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:32,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:46:32,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:46:32,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:46:32,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 658 transitions, 9948 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 20:46:32,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:32,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:46:32,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:34,748 INFO L124 PetriNetUnfolderBase]: 4412/6846 cut-off events. [2024-06-27 20:46:34,748 INFO L125 PetriNetUnfolderBase]: For 2409936/2409941 co-relation queries the response was YES. [2024-06-27 20:46:34,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86465 conditions, 6846 events. 4412/6846 cut-off events. For 2409936/2409941 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 40088 event pairs, 773 based on Foata normal form. 42/6884 useless extension candidates. Maximal degree in co-relation 86256. Up to 4334 conditions per place. [2024-06-27 20:46:34,880 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 456 selfloop transitions, 248 changer transitions 0/708 dead transitions. [2024-06-27 20:46:34,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 708 transitions, 13266 flow [2024-06-27 20:46:34,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:46:34,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:46:34,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-27 20:46:34,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455 [2024-06-27 20:46:34,882 INFO L175 Difference]: Start difference. First operand has 437 places, 658 transitions, 9948 flow. Second operand 10 states and 182 transitions. [2024-06-27 20:46:34,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 708 transitions, 13266 flow [2024-06-27 20:46:41,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 708 transitions, 13092 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 20:46:41,746 INFO L231 Difference]: Finished difference. Result has 440 places, 663 transitions, 10641 flow [2024-06-27 20:46:41,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9774, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10641, PETRI_PLACES=440, PETRI_TRANSITIONS=663} [2024-06-27 20:46:41,746 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 399 predicate places. [2024-06-27 20:46:41,746 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 663 transitions, 10641 flow [2024-06-27 20:46:41,746 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 20:46:41,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:41,747 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 20:46:41,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 20:46:41,747 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 20:46:41,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:41,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1412190278, now seen corresponding path program 3 times [2024-06-27 20:46:41,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:41,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320870570] [2024-06-27 20:46:41,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:41,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:41,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:42,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:42,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:42,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320870570] [2024-06-27 20:46:42,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320870570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:42,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:42,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:46:42,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835100439] [2024-06-27 20:46:42,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:42,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:46:42,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:42,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:46:42,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:46:42,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:46:42,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 663 transitions, 10641 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 20:46:42,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:42,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:46:42,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:45,114 INFO L124 PetriNetUnfolderBase]: 4508/7001 cut-off events. [2024-06-27 20:46:45,114 INFO L125 PetriNetUnfolderBase]: For 2395728/2395736 co-relation queries the response was YES. [2024-06-27 20:46:45,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90522 conditions, 7001 events. 4508/7001 cut-off events. For 2395728/2395736 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 41418 event pairs, 860 based on Foata normal form. 32/7030 useless extension candidates. Maximal degree in co-relation 90311. Up to 6400 conditions per place. [2024-06-27 20:46:45,248 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 599 selfloop transitions, 85 changer transitions 0/688 dead transitions. [2024-06-27 20:46:45,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 688 transitions, 12346 flow [2024-06-27 20:46:45,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:46:45,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:46:45,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-27 20:46:45,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 20:46:45,249 INFO L175 Difference]: Start difference. First operand has 440 places, 663 transitions, 10641 flow. Second operand 10 states and 160 transitions. [2024-06-27 20:46:45,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 688 transitions, 12346 flow [2024-06-27 20:46:51,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 688 transitions, 11882 flow, removed 67 selfloop flow, removed 6 redundant places. [2024-06-27 20:46:51,473 INFO L231 Difference]: Finished difference. Result has 444 places, 666 transitions, 10580 flow [2024-06-27 20:46:51,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10185, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10580, PETRI_PLACES=444, PETRI_TRANSITIONS=666} [2024-06-27 20:46:51,473 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 403 predicate places. [2024-06-27 20:46:51,474 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 666 transitions, 10580 flow [2024-06-27 20:46:51,474 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 20:46:51,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:51,474 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 20:46:51,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 20:46:51,474 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 20:46:51,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:51,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1422915038, now seen corresponding path program 4 times [2024-06-27 20:46:51,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:51,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102603947] [2024-06-27 20:46:51,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:51,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:51,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:52,322 INFO 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 20:46:52,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:52,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102603947] [2024-06-27 20:46:52,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102603947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:52,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:52,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:46:52,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560644402] [2024-06-27 20:46:52,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:52,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:46:52,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:52,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:46:52,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:46:52,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:46:52,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 666 transitions, 10580 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 20:46:52,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:52,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:46:52,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:54,737 INFO L124 PetriNetUnfolderBase]: 4604/7145 cut-off events. [2024-06-27 20:46:54,737 INFO L125 PetriNetUnfolderBase]: For 2450921/2450929 co-relation queries the response was YES. [2024-06-27 20:46:54,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92434 conditions, 7145 events. 4604/7145 cut-off events. For 2450921/2450929 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 42422 event pairs, 894 based on Foata normal form. 32/7174 useless extension candidates. Maximal degree in co-relation 92221. Up to 6552 conditions per place. [2024-06-27 20:46:54,874 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 603 selfloop transitions, 84 changer transitions 0/691 dead transitions. [2024-06-27 20:46:54,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 691 transitions, 12289 flow [2024-06-27 20:46:54,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:46:54,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:46:54,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-27 20:46:54,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3975 [2024-06-27 20:46:54,875 INFO L175 Difference]: Start difference. First operand has 444 places, 666 transitions, 10580 flow. Second operand 10 states and 159 transitions. [2024-06-27 20:46:54,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 691 transitions, 12289 flow [2024-06-27 20:47:01,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 691 transitions, 12009 flow, removed 59 selfloop flow, removed 8 redundant places. [2024-06-27 20:47:01,392 INFO L231 Difference]: Finished difference. Result has 446 places, 669 transitions, 10699 flow [2024-06-27 20:47:01,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10300, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10699, PETRI_PLACES=446, PETRI_TRANSITIONS=669} [2024-06-27 20:47:01,405 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 405 predicate places. [2024-06-27 20:47:01,405 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 669 transitions, 10699 flow [2024-06-27 20:47:01,405 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 20:47:01,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:01,405 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 20:47:01,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 20:47:01,406 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 20:47:01,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:01,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1456144494, now seen corresponding path program 5 times [2024-06-27 20:47:01,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:01,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599148137] [2024-06-27 20:47:01,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:01,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:01,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:02,180 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 20:47:02,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:02,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599148137] [2024-06-27 20:47:02,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599148137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:02,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:02,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:47:02,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637202612] [2024-06-27 20:47:02,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:02,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:47:02,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:02,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:47:02,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:47:02,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:47:02,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 669 transitions, 10699 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 20:47:02,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:02,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:47:02,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:04,793 INFO L124 PetriNetUnfolderBase]: 4763/7427 cut-off events. [2024-06-27 20:47:04,793 INFO L125 PetriNetUnfolderBase]: For 2610558/2610563 co-relation queries the response was YES. [2024-06-27 20:47:04,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92823 conditions, 7427 events. 4763/7427 cut-off events. For 2610558/2610563 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 44514 event pairs, 949 based on Foata normal form. 50/7473 useless extension candidates. Maximal degree in co-relation 92609. Up to 5609 conditions per place. [2024-06-27 20:47:05,050 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 450 selfloop transitions, 253 changer transitions 0/707 dead transitions. [2024-06-27 20:47:05,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 707 transitions, 13390 flow [2024-06-27 20:47:05,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:47:05,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:47:05,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-27 20:47:05,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425 [2024-06-27 20:47:05,051 INFO L175 Difference]: Start difference. First operand has 446 places, 669 transitions, 10699 flow. Second operand 10 states and 177 transitions. [2024-06-27 20:47:05,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 707 transitions, 13390 flow [2024-06-27 20:47:11,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 707 transitions, 13088 flow, removed 69 selfloop flow, removed 9 redundant places. [2024-06-27 20:47:11,861 INFO L231 Difference]: Finished difference. Result has 447 places, 671 transitions, 11075 flow [2024-06-27 20:47:11,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10403, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11075, PETRI_PLACES=447, PETRI_TRANSITIONS=671} [2024-06-27 20:47:11,862 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 406 predicate places. [2024-06-27 20:47:11,862 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 671 transitions, 11075 flow [2024-06-27 20:47:11,862 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 20:47:11,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:11,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:11,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 20:47:11,862 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 20:47:11,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:11,863 INFO L85 PathProgramCache]: Analyzing trace with hash 57932388, now seen corresponding path program 7 times [2024-06-27 20:47:11,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:11,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112362955] [2024-06-27 20:47:11,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:11,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:11,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:12,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:12,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:12,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112362955] [2024-06-27 20:47:12,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112362955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:12,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:12,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:12,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420254561] [2024-06-27 20:47:12,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:12,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:12,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:12,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:12,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:12,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:47:12,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 671 transitions, 11075 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 20:47:12,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:12,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:47:12,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:14,561 INFO L124 PetriNetUnfolderBase]: 4765/7432 cut-off events. [2024-06-27 20:47:14,561 INFO L125 PetriNetUnfolderBase]: For 2110434/2110442 co-relation queries the response was YES. [2024-06-27 20:47:14,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92208 conditions, 7432 events. 4765/7432 cut-off events. For 2110434/2110442 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 44654 event pairs, 1019 based on Foata normal form. 6/7416 useless extension candidates. Maximal degree in co-relation 91994. Up to 6717 conditions per place. [2024-06-27 20:47:14,691 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 579 selfloop transitions, 117 changer transitions 0/700 dead transitions. [2024-06-27 20:47:14,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 700 transitions, 12723 flow [2024-06-27 20:47:14,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:47:14,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:47:14,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 20:47:14,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-27 20:47:14,693 INFO L175 Difference]: Start difference. First operand has 447 places, 671 transitions, 11075 flow. Second operand 8 states and 132 transitions. [2024-06-27 20:47:14,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 700 transitions, 12723 flow [2024-06-27 20:47:20,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 700 transitions, 12108 flow, removed 51 selfloop flow, removed 8 redundant places. [2024-06-27 20:47:20,406 INFO L231 Difference]: Finished difference. Result has 448 places, 679 transitions, 10895 flow [2024-06-27 20:47:20,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10474, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10895, PETRI_PLACES=448, PETRI_TRANSITIONS=679} [2024-06-27 20:47:20,406 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 407 predicate places. [2024-06-27 20:47:20,407 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 679 transitions, 10895 flow [2024-06-27 20:47:20,407 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 20:47:20,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:20,407 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 20:47:20,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 20:47:20,407 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 20:47:20,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:20,408 INFO L85 PathProgramCache]: Analyzing trace with hash 650381309, now seen corresponding path program 2 times [2024-06-27 20:47:20,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:20,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810517157] [2024-06-27 20:47:20,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:20,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:20,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:21,139 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 20:47:21,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:21,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810517157] [2024-06-27 20:47:21,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810517157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:21,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:21,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:47:21,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264820131] [2024-06-27 20:47:21,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:21,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:47:21,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:21,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:47:21,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:47:21,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:47:21,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 679 transitions, 10895 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 20:47:21,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:21,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:47:21,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:23,568 INFO L124 PetriNetUnfolderBase]: 4770/7422 cut-off events. [2024-06-27 20:47:23,568 INFO L125 PetriNetUnfolderBase]: For 2104935/2104937 co-relation queries the response was YES. [2024-06-27 20:47:23,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91434 conditions, 7422 events. 4770/7422 cut-off events. For 2104935/2104937 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 44457 event pairs, 970 based on Foata normal form. 1/7396 useless extension candidates. Maximal degree in co-relation 91218. Up to 6719 conditions per place. [2024-06-27 20:47:23,818 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 567 selfloop transitions, 133 changer transitions 0/704 dead transitions. [2024-06-27 20:47:23,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 704 transitions, 12476 flow [2024-06-27 20:47:23,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:47:23,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:47:23,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 20:47:23,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-27 20:47:23,820 INFO L175 Difference]: Start difference. First operand has 448 places, 679 transitions, 10895 flow. Second operand 8 states and 137 transitions. [2024-06-27 20:47:23,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 704 transitions, 12476 flow [2024-06-27 20:47:31,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 704 transitions, 12291 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 20:47:31,125 INFO L231 Difference]: Finished difference. Result has 452 places, 682 transitions, 11093 flow [2024-06-27 20:47:31,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10710, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11093, PETRI_PLACES=452, PETRI_TRANSITIONS=682} [2024-06-27 20:47:31,126 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 411 predicate places. [2024-06-27 20:47:31,126 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 682 transitions, 11093 flow [2024-06-27 20:47:31,126 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 20:47:31,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:31,126 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 20:47:31,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-27 20:47:31,126 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 20:47:31,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:31,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1696806683, now seen corresponding path program 3 times [2024-06-27 20:47:31,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:31,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139740097] [2024-06-27 20:47:31,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:31,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:31,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:31,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:31,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:31,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139740097] [2024-06-27 20:47:31,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139740097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:31,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:31,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:47:31,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318555207] [2024-06-27 20:47:31,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:31,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:47:31,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:31,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:47:31,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:47:31,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:47:31,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 682 transitions, 11093 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 20:47:31,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:31,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:47:31,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:34,303 INFO L124 PetriNetUnfolderBase]: 4767/7411 cut-off events. [2024-06-27 20:47:34,304 INFO L125 PetriNetUnfolderBase]: For 2124393/2124395 co-relation queries the response was YES. [2024-06-27 20:47:34,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91497 conditions, 7411 events. 4767/7411 cut-off events. For 2124393/2124395 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 44310 event pairs, 965 based on Foata normal form. 1/7387 useless extension candidates. Maximal degree in co-relation 91279. Up to 6627 conditions per place. [2024-06-27 20:47:34,450 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 534 selfloop transitions, 165 changer transitions 0/703 dead transitions. [2024-06-27 20:47:34,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 703 transitions, 12855 flow [2024-06-27 20:47:34,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:47:34,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:47:34,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 20:47:34,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-27 20:47:34,451 INFO L175 Difference]: Start difference. First operand has 452 places, 682 transitions, 11093 flow. Second operand 8 states and 137 transitions. [2024-06-27 20:47:34,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 703 transitions, 12855 flow [2024-06-27 20:47:40,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 703 transitions, 12481 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-27 20:47:41,003 INFO L231 Difference]: Finished difference. Result has 454 places, 682 transitions, 11059 flow [2024-06-27 20:47:41,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10719, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11059, PETRI_PLACES=454, PETRI_TRANSITIONS=682} [2024-06-27 20:47:41,003 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 413 predicate places. [2024-06-27 20:47:41,003 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 682 transitions, 11059 flow [2024-06-27 20:47:41,003 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 20:47:41,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:41,004 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 20:47:41,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-27 20:47:41,004 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 20:47:41,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:41,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1428968326, now seen corresponding path program 8 times [2024-06-27 20:47:41,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:41,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515117184] [2024-06-27 20:47:41,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:41,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:41,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:41,518 INFO 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 20:47:41,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:41,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515117184] [2024-06-27 20:47:41,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515117184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:41,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:41,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:41,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154619896] [2024-06-27 20:47:41,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:41,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:41,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:41,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:41,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:41,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:47:41,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 682 transitions, 11059 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 20:47:41,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:41,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:47:41,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:44,001 INFO L124 PetriNetUnfolderBase]: 4769/7448 cut-off events. [2024-06-27 20:47:44,001 INFO L125 PetriNetUnfolderBase]: For 2149906/2149914 co-relation queries the response was YES. [2024-06-27 20:47:44,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91661 conditions, 7448 events. 4769/7448 cut-off events. For 2149906/2149914 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 44870 event pairs, 1027 based on Foata normal form. 6/7434 useless extension candidates. Maximal degree in co-relation 91442. Up to 6707 conditions per place. [2024-06-27 20:47:44,133 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 578 selfloop transitions, 122 changer transitions 0/704 dead transitions. [2024-06-27 20:47:44,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 704 transitions, 12613 flow [2024-06-27 20:47:44,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:47:44,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:47:44,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 20:47:44,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-27 20:47:44,134 INFO L175 Difference]: Start difference. First operand has 454 places, 682 transitions, 11059 flow. Second operand 8 states and 132 transitions. [2024-06-27 20:47:44,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 704 transitions, 12613 flow [2024-06-27 20:47:49,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 704 transitions, 12232 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 20:47:49,750 INFO L231 Difference]: Finished difference. Result has 455 places, 685 transitions, 11010 flow [2024-06-27 20:47:49,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10678, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11010, PETRI_PLACES=455, PETRI_TRANSITIONS=685} [2024-06-27 20:47:49,751 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 414 predicate places. [2024-06-27 20:47:49,751 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 685 transitions, 11010 flow [2024-06-27 20:47:49,751 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 20:47:49,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:49,752 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 20:47:49,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-27 20:47:49,752 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 20:47:49,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:49,752 INFO L85 PathProgramCache]: Analyzing trace with hash -912817573, now seen corresponding path program 4 times [2024-06-27 20:47:49,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:49,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001561441] [2024-06-27 20:47:49,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:49,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:49,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:50,560 INFO 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 20:47:50,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:50,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001561441] [2024-06-27 20:47:50,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001561441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:50,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:50,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:47:50,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310199883] [2024-06-27 20:47:50,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:50,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:47:50,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:50,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:47:50,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:47:50,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:47:50,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 685 transitions, 11010 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 20:47:50,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:50,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:47:50,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:53,251 INFO L124 PetriNetUnfolderBase]: 4766/7418 cut-off events. [2024-06-27 20:47:53,251 INFO L125 PetriNetUnfolderBase]: For 2160275/2160277 co-relation queries the response was YES. [2024-06-27 20:47:53,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91482 conditions, 7418 events. 4766/7418 cut-off events. For 2160275/2160277 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 44401 event pairs, 983 based on Foata normal form. 1/7394 useless extension candidates. Maximal degree in co-relation 91262. Up to 6714 conditions per place. [2024-06-27 20:47:53,383 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 572 selfloop transitions, 130 changer transitions 0/706 dead transitions. [2024-06-27 20:47:53,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 706 transitions, 12492 flow [2024-06-27 20:47:53,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:47:53,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:47:53,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 20:47:53,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-27 20:47:53,385 INFO L175 Difference]: Start difference. First operand has 455 places, 685 transitions, 11010 flow. Second operand 8 states and 138 transitions. [2024-06-27 20:47:53,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 706 transitions, 12492 flow [2024-06-27 20:47:59,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 706 transitions, 12156 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-27 20:47:59,023 INFO L231 Difference]: Finished difference. Result has 457 places, 685 transitions, 10946 flow [2024-06-27 20:47:59,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10674, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10946, PETRI_PLACES=457, PETRI_TRANSITIONS=685} [2024-06-27 20:47:59,023 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 416 predicate places. [2024-06-27 20:47:59,024 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 685 transitions, 10946 flow [2024-06-27 20:47:59,024 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 20:47:59,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:59,024 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 20:47:59,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-27 20:47:59,024 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 20:47:59,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:59,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1428968698, now seen corresponding path program 7 times [2024-06-27 20:47:59,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:59,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509793374] [2024-06-27 20:47:59,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:59,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:59,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:59,576 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 20:47:59,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:59,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509793374] [2024-06-27 20:47:59,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509793374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:59,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:59,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:47:59,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887333382] [2024-06-27 20:47:59,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:59,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:47:59,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:59,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:47:59,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:47:59,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:47:59,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 685 transitions, 10946 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 20:47:59,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:59,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:47:59,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:01,999 INFO L124 PetriNetUnfolderBase]: 4776/7433 cut-off events. [2024-06-27 20:48:01,999 INFO L125 PetriNetUnfolderBase]: For 2200861/2200863 co-relation queries the response was YES. [2024-06-27 20:48:02,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91861 conditions, 7433 events. 4776/7433 cut-off events. For 2200861/2200863 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 44551 event pairs, 982 based on Foata normal form. 2/7410 useless extension candidates. Maximal degree in co-relation 91640. Up to 6725 conditions per place. [2024-06-27 20:48:02,266 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 572 selfloop transitions, 136 changer transitions 0/712 dead transitions. [2024-06-27 20:48:02,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 712 transitions, 12607 flow [2024-06-27 20:48:02,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:48:02,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:48:02,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 20:48:02,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41388888888888886 [2024-06-27 20:48:02,267 INFO L175 Difference]: Start difference. First operand has 457 places, 685 transitions, 10946 flow. Second operand 9 states and 149 transitions. [2024-06-27 20:48:02,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 712 transitions, 12607 flow [2024-06-27 20:48:08,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 712 transitions, 12320 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 20:48:08,419 INFO L231 Difference]: Finished difference. Result has 459 places, 688 transitions, 11092 flow [2024-06-27 20:48:08,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10659, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11092, PETRI_PLACES=459, PETRI_TRANSITIONS=688} [2024-06-27 20:48:08,420 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 418 predicate places. [2024-06-27 20:48:08,420 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 688 transitions, 11092 flow [2024-06-27 20:48:08,420 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 20:48:08,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:08,420 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 20:48:08,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-27 20:48:08,421 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 20:48:08,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:08,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1783231366, now seen corresponding path program 9 times [2024-06-27 20:48:08,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:08,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126469177] [2024-06-27 20:48:08,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:08,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:08,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:08,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:08,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:08,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126469177] [2024-06-27 20:48:08,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126469177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:08,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:08,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:48:08,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538505612] [2024-06-27 20:48:08,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:08,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:48:08,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:08,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:48:08,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:48:08,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:48:08,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 688 transitions, 11092 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 20:48:08,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:08,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:48:08,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:11,314 INFO L124 PetriNetUnfolderBase]: 4786/7478 cut-off events. [2024-06-27 20:48:11,315 INFO L125 PetriNetUnfolderBase]: For 2231182/2231190 co-relation queries the response was YES. [2024-06-27 20:48:11,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92390 conditions, 7478 events. 4786/7478 cut-off events. For 2231182/2231190 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 45115 event pairs, 1017 based on Foata normal form. 6/7464 useless extension candidates. Maximal degree in co-relation 92168. Up to 6633 conditions per place. [2024-06-27 20:48:11,443 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 558 selfloop transitions, 146 changer transitions 0/708 dead transitions. [2024-06-27 20:48:11,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 708 transitions, 12636 flow [2024-06-27 20:48:11,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:48:11,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:48:11,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 20:48:11,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-27 20:48:11,445 INFO L175 Difference]: Start difference. First operand has 459 places, 688 transitions, 11092 flow. Second operand 8 states and 130 transitions. [2024-06-27 20:48:11,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 708 transitions, 12636 flow [2024-06-27 20:48:18,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 708 transitions, 12236 flow, removed 66 selfloop flow, removed 7 redundant places. [2024-06-27 20:48:18,320 INFO L231 Difference]: Finished difference. Result has 460 places, 691 transitions, 11054 flow [2024-06-27 20:48:18,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10692, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11054, PETRI_PLACES=460, PETRI_TRANSITIONS=691} [2024-06-27 20:48:18,320 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 419 predicate places. [2024-06-27 20:48:18,320 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 691 transitions, 11054 flow [2024-06-27 20:48:18,320 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 20:48:18,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:18,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:18,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-27 20:48:18,321 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 20:48:18,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:18,321 INFO L85 PathProgramCache]: Analyzing trace with hash 33828128, now seen corresponding path program 8 times [2024-06-27 20:48:18,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:18,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332754176] [2024-06-27 20:48:18,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:18,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:18,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:18,841 INFO 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 20:48:18,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:18,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332754176] [2024-06-27 20:48:18,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332754176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:18,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:18,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:48:18,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077762345] [2024-06-27 20:48:18,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:18,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:48:18,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:18,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:48:18,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:48:18,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:48:18,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 691 transitions, 11054 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 20:48:18,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:18,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:48:18,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:21,352 INFO L124 PetriNetUnfolderBase]: 4828/7508 cut-off events. [2024-06-27 20:48:21,352 INFO L125 PetriNetUnfolderBase]: For 2312444/2312446 co-relation queries the response was YES. [2024-06-27 20:48:21,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94202 conditions, 7508 events. 4828/7508 cut-off events. For 2312444/2312446 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 45064 event pairs, 979 based on Foata normal form. 2/7485 useless extension candidates. Maximal degree in co-relation 93979. Up to 6681 conditions per place. [2024-06-27 20:48:21,490 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 557 selfloop transitions, 163 changer transitions 0/724 dead transitions. [2024-06-27 20:48:21,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 724 transitions, 13637 flow [2024-06-27 20:48:21,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:48:21,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:48:21,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 20:48:21,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 20:48:21,491 INFO L175 Difference]: Start difference. First operand has 460 places, 691 transitions, 11054 flow. Second operand 9 states and 153 transitions. [2024-06-27 20:48:21,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 724 transitions, 13637 flow [2024-06-27 20:48:28,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 724 transitions, 13309 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 20:48:28,373 INFO L231 Difference]: Finished difference. Result has 464 places, 700 transitions, 11565 flow [2024-06-27 20:48:28,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10726, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=691, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11565, PETRI_PLACES=464, PETRI_TRANSITIONS=700} [2024-06-27 20:48:28,374 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 423 predicate places. [2024-06-27 20:48:28,374 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 700 transitions, 11565 flow [2024-06-27 20:48:28,374 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 20:48:28,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:28,375 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 20:48:28,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-27 20:48:28,375 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 20:48:28,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:28,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1783243828, now seen corresponding path program 9 times [2024-06-27 20:48:28,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:28,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420024400] [2024-06-27 20:48:28,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:28,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:28,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:28,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:28,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:28,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420024400] [2024-06-27 20:48:28,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420024400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:28,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:28,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:48:28,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635653210] [2024-06-27 20:48:28,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:28,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:48:28,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:28,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:48:28,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:48:28,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:48:28,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 700 transitions, 11565 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 20:48:28,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:28,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:48:28,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:31,572 INFO L124 PetriNetUnfolderBase]: 4822/7526 cut-off events. [2024-06-27 20:48:31,573 INFO L125 PetriNetUnfolderBase]: For 2323036/2323038 co-relation queries the response was YES. [2024-06-27 20:48:31,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94478 conditions, 7526 events. 4822/7526 cut-off events. For 2323036/2323038 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 45396 event pairs, 1020 based on Foata normal form. 2/7526 useless extension candidates. Maximal degree in co-relation 94253. Up to 7264 conditions per place. [2024-06-27 20:48:31,737 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 692 selfloop transitions, 24 changer transitions 0/720 dead transitions. [2024-06-27 20:48:31,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 720 transitions, 13081 flow [2024-06-27 20:48:31,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:48:31,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:48:31,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-27 20:48:31,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-27 20:48:31,738 INFO L175 Difference]: Start difference. First operand has 464 places, 700 transitions, 11565 flow. Second operand 9 states and 138 transitions. [2024-06-27 20:48:31,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 720 transitions, 13081 flow [2024-06-27 20:48:40,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 720 transitions, 12613 flow, removed 154 selfloop flow, removed 4 redundant places. [2024-06-27 20:48:40,021 INFO L231 Difference]: Finished difference. Result has 469 places, 700 transitions, 11151 flow [2024-06-27 20:48:40,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11097, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=676, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11151, PETRI_PLACES=469, PETRI_TRANSITIONS=700} [2024-06-27 20:48:40,022 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 428 predicate places. [2024-06-27 20:48:40,022 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 700 transitions, 11151 flow [2024-06-27 20:48:40,022 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 20:48:40,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:40,022 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 20:48:40,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-27 20:48:40,022 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 20:48:40,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:40,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1340999656, now seen corresponding path program 10 times [2024-06-27 20:48:40,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:40,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441625167] [2024-06-27 20:48:40,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:40,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:40,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:40,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:40,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:40,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441625167] [2024-06-27 20:48:40,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441625167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:40,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:40,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:48:40,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734505462] [2024-06-27 20:48:40,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:40,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:48:40,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:40,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:48:40,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:48:40,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:48:40,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 700 transitions, 11151 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 20:48:40,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:40,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:48:40,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:43,063 INFO L124 PetriNetUnfolderBase]: 4816/7492 cut-off events. [2024-06-27 20:48:43,063 INFO L125 PetriNetUnfolderBase]: For 2323691/2323695 co-relation queries the response was YES. [2024-06-27 20:48:43,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93498 conditions, 7492 events. 4816/7492 cut-off events. For 2323691/2323695 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 44954 event pairs, 1002 based on Foata normal form. 2/7472 useless extension candidates. Maximal degree in co-relation 93271. Up to 6781 conditions per place. [2024-06-27 20:48:43,207 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 588 selfloop transitions, 131 changer transitions 0/723 dead transitions. [2024-06-27 20:48:43,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 723 transitions, 12681 flow [2024-06-27 20:48:43,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:48:43,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:48:43,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 20:48:43,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 20:48:43,208 INFO L175 Difference]: Start difference. First operand has 469 places, 700 transitions, 11151 flow. Second operand 9 states and 150 transitions. [2024-06-27 20:48:43,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 723 transitions, 12681 flow [2024-06-27 20:48:50,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 723 transitions, 12541 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-27 20:48:50,647 INFO L231 Difference]: Finished difference. Result has 470 places, 700 transitions, 11279 flow [2024-06-27 20:48:50,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11011, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11279, PETRI_PLACES=470, PETRI_TRANSITIONS=700} [2024-06-27 20:48:50,648 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 429 predicate places. [2024-06-27 20:48:50,648 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 700 transitions, 11279 flow [2024-06-27 20:48:50,648 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 20:48:50,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:50,648 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 20:48:50,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-27 20:48:50,649 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 20:48:50,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:50,649 INFO L85 PathProgramCache]: Analyzing trace with hash 2131162084, now seen corresponding path program 11 times [2024-06-27 20:48:50,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:50,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117880556] [2024-06-27 20:48:50,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:50,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:50,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:51,218 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 20:48:51,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:51,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117880556] [2024-06-27 20:48:51,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117880556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:51,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:51,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:48:51,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40196527] [2024-06-27 20:48:51,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:51,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:48:51,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:51,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:48:51,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:48:51,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:48:51,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 700 transitions, 11279 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 20:48:51,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:51,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:48:51,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:53,824 INFO L124 PetriNetUnfolderBase]: 4824/7504 cut-off events. [2024-06-27 20:48:53,824 INFO L125 PetriNetUnfolderBase]: For 2363435/2363437 co-relation queries the response was YES. [2024-06-27 20:48:53,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94012 conditions, 7504 events. 4824/7504 cut-off events. For 2363435/2363437 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 45007 event pairs, 996 based on Foata normal form. 4/7483 useless extension candidates. Maximal degree in co-relation 93784. Up to 6695 conditions per place. [2024-06-27 20:48:53,956 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 570 selfloop transitions, 158 changer transitions 0/732 dead transitions. [2024-06-27 20:48:53,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 732 transitions, 13543 flow [2024-06-27 20:48:53,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:48:53,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:48:53,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 20:48:53,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 20:48:53,958 INFO L175 Difference]: Start difference. First operand has 470 places, 700 transitions, 11279 flow. Second operand 9 states and 153 transitions. [2024-06-27 20:48:53,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 732 transitions, 13543 flow [2024-06-27 20:49:01,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 732 transitions, 13213 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-27 20:49:01,479 INFO L231 Difference]: Finished difference. Result has 472 places, 709 transitions, 11676 flow [2024-06-27 20:49:01,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10949, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11676, PETRI_PLACES=472, PETRI_TRANSITIONS=709} [2024-06-27 20:49:01,479 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 431 predicate places. [2024-06-27 20:49:01,479 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 709 transitions, 11676 flow [2024-06-27 20:49:01,480 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 20:49:01,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:01,480 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 20:49:01,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-27 20:49:01,480 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 20:49:01,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:01,480 INFO L85 PathProgramCache]: Analyzing trace with hash 2063189647, now seen corresponding path program 4 times [2024-06-27 20:49:01,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:01,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398653223] [2024-06-27 20:49:01,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:01,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:01,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:02,173 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 20:49:02,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:02,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398653223] [2024-06-27 20:49:02,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398653223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:02,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:02,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:49:02,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737532166] [2024-06-27 20:49:02,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:02,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:49:02,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:02,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:49:02,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:49:02,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:49:02,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 709 transitions, 11676 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 20:49:02,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:02,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:49:02,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:04,692 INFO L124 PetriNetUnfolderBase]: 4805/7489 cut-off events. [2024-06-27 20:49:04,692 INFO L125 PetriNetUnfolderBase]: For 2347024/2347026 co-relation queries the response was YES. [2024-06-27 20:49:04,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93801 conditions, 7489 events. 4805/7489 cut-off events. For 2347024/2347026 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 45039 event pairs, 947 based on Foata normal form. 1/7477 useless extension candidates. Maximal degree in co-relation 93571. Up to 7118 conditions per place. [2024-06-27 20:49:04,831 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 674 selfloop transitions, 51 changer transitions 0/729 dead transitions. [2024-06-27 20:49:04,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 729 transitions, 13241 flow [2024-06-27 20:49:04,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:49:04,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:49:04,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-27 20:49:04,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3861111111111111 [2024-06-27 20:49:04,833 INFO L175 Difference]: Start difference. First operand has 472 places, 709 transitions, 11676 flow. Second operand 9 states and 139 transitions. [2024-06-27 20:49:04,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 729 transitions, 13241 flow [2024-06-27 20:49:13,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 729 transitions, 12803 flow, removed 121 selfloop flow, removed 6 redundant places. [2024-06-27 20:49:13,077 INFO L231 Difference]: Finished difference. Result has 475 places, 710 transitions, 11401 flow [2024-06-27 20:49:13,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11244, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=658, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11401, PETRI_PLACES=475, PETRI_TRANSITIONS=710} [2024-06-27 20:49:13,078 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 434 predicate places. [2024-06-27 20:49:13,078 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 710 transitions, 11401 flow [2024-06-27 20:49:13,078 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 20:49:13,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:13,090 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 20:49:13,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-27 20:49:13,090 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 20:49:13,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:13,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1337280586, now seen corresponding path program 12 times [2024-06-27 20:49:13,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:13,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398512616] [2024-06-27 20:49:13,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:13,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:13,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:13,656 INFO 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 20:49:13,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:13,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398512616] [2024-06-27 20:49:13,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398512616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:13,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:13,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:49:13,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273090475] [2024-06-27 20:49:13,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:13,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:49:13,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:13,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:49:13,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:49:13,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:49:13,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 710 transitions, 11401 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 20:49:13,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:13,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:49:13,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:16,125 INFO L124 PetriNetUnfolderBase]: 4807/7473 cut-off events. [2024-06-27 20:49:16,125 INFO L125 PetriNetUnfolderBase]: For 2366133/2366135 co-relation queries the response was YES. [2024-06-27 20:49:16,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93337 conditions, 7473 events. 4807/7473 cut-off events. For 2366133/2366135 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 44748 event pairs, 1001 based on Foata normal form. 2/7453 useless extension candidates. Maximal degree in co-relation 93106. Up to 6670 conditions per place. [2024-06-27 20:49:16,270 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 574 selfloop transitions, 158 changer transitions 0/736 dead transitions. [2024-06-27 20:49:16,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 736 transitions, 13454 flow [2024-06-27 20:49:16,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:49:16,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:49:16,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 20:49:16,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-27 20:49:16,432 INFO L175 Difference]: Start difference. First operand has 475 places, 710 transitions, 11401 flow. Second operand 9 states and 154 transitions. [2024-06-27 20:49:16,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 736 transitions, 13454 flow