./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix025_power.oepc_power.opt_pso.oepc_rmo.oepc_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/mix025_power.oepc_power.opt_pso.oepc_rmo.oepc_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/mix025_power.oepc_power.opt_pso.oepc_rmo.oepc_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/protection/mix025_power.oepc_power.opt_pso.oepc_rmo.oepc_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 20:10:52,687 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:10:52,746 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:10:52,751 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:10:52,752 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:10:52,777 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:10:52,779 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:10:52,779 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:10:52,780 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:10:52,783 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:10:52,783 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:10:52,784 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:10:52,784 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:10:52,785 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:10:52,785 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:10:52,786 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:10:52,786 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:10:52,786 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:10:52,786 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:10:52,786 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:10:52,787 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:10:52,787 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:10:52,787 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:10:52,788 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:10:52,788 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:10:52,788 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:10:52,788 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:10:52,788 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:10:52,789 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:10:52,789 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:10:52,790 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:10:52,790 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:10:52,790 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:10:52,791 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:10:52,791 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:10:52,791 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:10:52,791 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:10:52,791 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:10:52,792 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:10:52,792 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:10:52,792 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:10:52,792 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:10:52,792 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:10:52,793 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:10:53,004 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:10:53,024 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:10:53,026 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:10:53,027 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:10:53,027 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:10:53,028 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix025_power.oepc_power.opt_pso.oepc_rmo.oepc_tso.oepc_tso.opt.i [2024-06-27 20:10:54,086 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:10:54,305 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:10:54,306 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix025_power.oepc_power.opt_pso.oepc_rmo.oepc_tso.oepc_tso.opt.i [2024-06-27 20:10:54,316 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/926626f4f/3800e1ca5050474192389318e7ad7439/FLAG493c86eba [2024-06-27 20:10:54,326 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/926626f4f/3800e1ca5050474192389318e7ad7439 [2024-06-27 20:10:54,328 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:10:54,328 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:10:54,330 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix025_power.oepc_power.opt_pso.oepc_rmo.oepc_tso.oepc_tso.opt.yml/witness.yml [2024-06-27 20:10:54,507 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:10:54,508 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:10:54,509 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:10:54,509 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:10:54,512 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:10:54,513 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:10:54" (1/2) ... [2024-06-27 20:10:54,514 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b4dd36b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:54, skipping insertion in model container [2024-06-27 20:10:54,514 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:10:54" (1/2) ... [2024-06-27 20:10:54,515 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@139e5294 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:54, skipping insertion in model container [2024-06-27 20:10:54,517 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:10:54" (2/2) ... [2024-06-27 20:10:54,517 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b4dd36b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:10:54, skipping insertion in model container [2024-06-27 20:10:54,517 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:10:54" (2/2) ... [2024-06-27 20:10:54,517 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:10:54,590 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:10:54,591 INFO L97 edCorrectnessWitness]: Location invariant before [L843-L843] ((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1)) [2024-06-27 20:10:54,592 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] ((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1)) [2024-06-27 20:10:54,592 INFO L97 edCorrectnessWitness]: Location invariant before [L844-L844] ((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1)) [2024-06-27 20:10:54,592 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:10:54,592 INFO L106 edCorrectnessWitness]: ghost_update [L839-L839] multithreaded = 1; [2024-06-27 20:10:54,629 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:10:54,907 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:10:54,914 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:10:55,051 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:10:55,080 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:10:55,081 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:10:55 WrapperNode [2024-06-27 20:10:55,082 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:10:55,083 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:10:55,083 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:10:55,083 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:10:55,089 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:10:55" (1/1) ... [2024-06-27 20:10:55,116 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:10:55" (1/1) ... [2024-06-27 20:10:55,149 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 126 [2024-06-27 20:10:55,150 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:10:55,150 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:10:55,151 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:10:55,151 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:10:55,165 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:10:55" (1/1) ... [2024-06-27 20:10:55,165 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:10:55" (1/1) ... [2024-06-27 20:10:55,176 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:10:55" (1/1) ... [2024-06-27 20:10:55,190 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 20:10:55,202 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:10:55" (1/1) ... [2024-06-27 20:10:55,202 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:10:55" (1/1) ... [2024-06-27 20:10:55,208 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:10:55" (1/1) ... [2024-06-27 20:10:55,210 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:10:55" (1/1) ... [2024-06-27 20:10:55,211 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:10:55" (1/1) ... [2024-06-27 20:10:55,212 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:10:55" (1/1) ... [2024-06-27 20:10:55,214 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:10:55,215 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:10:55,215 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:10:55,215 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:10:55,216 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:10:55" (1/1) ... [2024-06-27 20:10:55,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:10:55,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:10:55,241 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 20:10:55,268 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 20:10:55,282 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:10:55,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:10:55,282 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:10:55,282 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:10:55,282 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:10:55,283 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:10:55,283 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 20:10:55,283 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 20:10:55,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:10:55,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:10:55,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:10:55,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:10:55,285 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 20:10:55,377 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:10:55,379 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:10:55,657 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:10:55,657 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:10:55,876 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:10:55,876 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:10:55,877 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:10:55 BoogieIcfgContainer [2024-06-27 20:10:55,877 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:10:55,880 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:10:55,880 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:10:55,882 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:10:55,883 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:10:54" (1/4) ... [2024-06-27 20:10:55,884 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@496bb2fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:10:55, skipping insertion in model container [2024-06-27 20:10:55,884 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:10:54" (2/4) ... [2024-06-27 20:10:55,884 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@496bb2fc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:10:55, skipping insertion in model container [2024-06-27 20:10:55,885 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:10:55" (3/4) ... [2024-06-27 20:10:55,885 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@496bb2fc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:10:55, skipping insertion in model container [2024-06-27 20:10:55,885 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:10:55" (4/4) ... [2024-06-27 20:10:55,886 INFO L112 eAbstractionObserver]: Analyzing ICFG mix025_power.oepc_power.opt_pso.oepc_rmo.oepc_tso.oepc_tso.opt.i [2024-06-27 20:10:55,899 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:10:55,899 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 20:10:55,900 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:10:55,948 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:10:55,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-27 20:10:56,015 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-27 20:10:56,015 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:10:56,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 20:10:56,017 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-27 20:10:56,020 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-27 20:10:56,028 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:10:56,036 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;@6222f58d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:10:56,037 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 20:10:56,039 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:10:56,040 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-27 20:10:56,040 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:10:56,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:56,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:10:56,041 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 20:10:56,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:56,089 INFO L85 PathProgramCache]: Analyzing trace with hash 373697404, now seen corresponding path program 1 times [2024-06-27 20:10:56,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:56,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948444918] [2024-06-27 20:10:56,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:56,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:56,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:56,774 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 20:10:56,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:56,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948444918] [2024-06-27 20:10:56,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948444918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:56,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:56,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:10:56,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672964548] [2024-06-27 20:10:56,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:56,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:10:56,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:56,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:10:56,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:10:56,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-27 20:10:56,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:56,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:56,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-27 20:10:56,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:57,210 INFO L124 PetriNetUnfolderBase]: 1359/2099 cut-off events. [2024-06-27 20:10:57,210 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-27 20:10:57,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4213 conditions, 2099 events. 1359/2099 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10050 event pairs, 941 based on Foata normal form. 1/2056 useless extension candidates. Maximal degree in co-relation 4201. Up to 2029 conditions per place. [2024-06-27 20:10:57,224 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 32 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-27 20:10:57,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 171 flow [2024-06-27 20:10:57,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:10:57,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:10:57,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2024-06-27 20:10:57,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 20:10:57,235 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 75 transitions. [2024-06-27 20:10:57,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 171 flow [2024-06-27 20:10:57,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 20:10:57,241 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-27 20:10:57,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-27 20:10:57,245 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-27 20:10:57,245 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-27 20:10:57,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:57,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:57,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:57,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:10:57,246 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 20:10:57,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:57,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1653924427, now seen corresponding path program 1 times [2024-06-27 20:10:57,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:57,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906649245] [2024-06-27 20:10:57,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:57,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:57,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:57,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:57,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:57,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906649245] [2024-06-27 20:10:57,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906649245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:57,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:57,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:10:57,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919786191] [2024-06-27 20:10:57,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:57,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:10:57,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:57,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:10:57,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:10:57,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-27 20:10:57,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:57,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:57,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-27 20:10:57,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:58,003 INFO L124 PetriNetUnfolderBase]: 1353/2090 cut-off events. [2024-06-27 20:10:58,003 INFO L125 PetriNetUnfolderBase]: For 396/396 co-relation queries the response was YES. [2024-06-27 20:10:58,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4746 conditions, 2090 events. 1353/2090 cut-off events. For 396/396 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10005 event pairs, 795 based on Foata normal form. 3/2082 useless extension candidates. Maximal degree in co-relation 4734. Up to 2005 conditions per place. [2024-06-27 20:10:58,013 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 39 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-06-27 20:10:58,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 238 flow [2024-06-27 20:10:58,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:10:58,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:10:58,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-06-27 20:10:58,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-27 20:10:58,015 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 97 transitions. [2024-06-27 20:10:58,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 238 flow [2024-06-27 20:10:58,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:10:58,017 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-27 20:10:58,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-27 20:10:58,018 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-27 20:10:58,018 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-27 20:10:58,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:58,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:58,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:58,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:10:58,019 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 20:10:58,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:58,019 INFO L85 PathProgramCache]: Analyzing trace with hash -283436140, now seen corresponding path program 1 times [2024-06-27 20:10:58,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:58,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105812610] [2024-06-27 20:10:58,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:58,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:58,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:58,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:58,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:58,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105812610] [2024-06-27 20:10:58,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105812610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:58,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:58,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:10:58,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775137479] [2024-06-27 20:10:58,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:58,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:10:58,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:58,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:10:58,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:10:58,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 20:10:58,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:58,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:58,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 20:10:58,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:59,206 INFO L124 PetriNetUnfolderBase]: 1641/2510 cut-off events. [2024-06-27 20:10:59,206 INFO L125 PetriNetUnfolderBase]: For 1285/1285 co-relation queries the response was YES. [2024-06-27 20:10:59,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6293 conditions, 2510 events. 1641/2510 cut-off events. For 1285/1285 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11956 event pairs, 746 based on Foata normal form. 3/2500 useless extension candidates. Maximal degree in co-relation 6279. Up to 2393 conditions per place. [2024-06-27 20:10:59,217 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 54 selfloop transitions, 13 changer transitions 0/72 dead transitions. [2024-06-27 20:10:59,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 72 transitions, 372 flow [2024-06-27 20:10:59,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:10:59,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:10:59,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-27 20:10:59,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-27 20:10:59,219 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 6 states and 136 transitions. [2024-06-27 20:10:59,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 72 transitions, 372 flow [2024-06-27 20:10:59,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 72 transitions, 352 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 20:10:59,222 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 194 flow [2024-06-27 20:10:59,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=194, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2024-06-27 20:10:59,222 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-27 20:10:59,223 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 194 flow [2024-06-27 20:10:59,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:59,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:59,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:59,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:10:59,223 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 20:10:59,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:59,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1521759228, now seen corresponding path program 1 times [2024-06-27 20:10:59,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:59,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355476282] [2024-06-27 20:10:59,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:59,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:59,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:59,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:59,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355476282] [2024-06-27 20:10:59,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355476282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:59,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:59,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:10:59,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488762623] [2024-06-27 20:10:59,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:59,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:10:59,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:59,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:10:59,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:10:59,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 20:10:59,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 194 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 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 20:10:59,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:59,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 20:10:59,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:00,331 INFO L124 PetriNetUnfolderBase]: 1632/2495 cut-off events. [2024-06-27 20:11:00,331 INFO L125 PetriNetUnfolderBase]: For 2539/2539 co-relation queries the response was YES. [2024-06-27 20:11:00,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6972 conditions, 2495 events. 1632/2495 cut-off events. For 2539/2539 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11847 event pairs, 582 based on Foata normal form. 6/2488 useless extension candidates. Maximal degree in co-relation 6956. Up to 2348 conditions per place. [2024-06-27 20:11:00,344 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 58 selfloop transitions, 15 changer transitions 0/78 dead transitions. [2024-06-27 20:11:00,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 78 transitions, 432 flow [2024-06-27 20:11:00,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:11:00,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:11:00,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-27 20:11:00,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5331010452961672 [2024-06-27 20:11:00,346 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 194 flow. Second operand 7 states and 153 transitions. [2024-06-27 20:11:00,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 78 transitions, 432 flow [2024-06-27 20:11:00,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 78 transitions, 404 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 20:11:00,349 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 215 flow [2024-06-27 20:11:00,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=215, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2024-06-27 20:11:00,350 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2024-06-27 20:11:00,350 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 215 flow [2024-06-27 20:11:00,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 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 20:11:00,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:00,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:00,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:11:00,351 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 20:11:00,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:00,351 INFO L85 PathProgramCache]: Analyzing trace with hash 825508084, now seen corresponding path program 1 times [2024-06-27 20:11:00,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:00,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499324293] [2024-06-27 20:11:00,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:00,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:00,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:00,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:00,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:00,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499324293] [2024-06-27 20:11:00,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499324293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:00,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:00,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:11:00,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479284000] [2024-06-27 20:11:00,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:00,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:11:00,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:00,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:11:00,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:11:00,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:11:00,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 215 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 20:11:00,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:00,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:11:00,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:01,202 INFO L124 PetriNetUnfolderBase]: 1627/2500 cut-off events. [2024-06-27 20:11:01,202 INFO L125 PetriNetUnfolderBase]: For 3802/3802 co-relation queries the response was YES. [2024-06-27 20:11:01,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7408 conditions, 2500 events. 1627/2500 cut-off events. For 3802/3802 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 11864 event pairs, 689 based on Foata normal form. 2/2501 useless extension candidates. Maximal degree in co-relation 7390. Up to 2407 conditions per place. [2024-06-27 20:11:01,214 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 47 selfloop transitions, 8 changer transitions 0/59 dead transitions. [2024-06-27 20:11:01,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 59 transitions, 369 flow [2024-06-27 20:11:01,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:11:01,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:11:01,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-27 20:11:01,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44390243902439025 [2024-06-27 20:11:01,216 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 215 flow. Second operand 5 states and 91 transitions. [2024-06-27 20:11:01,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 59 transitions, 369 flow [2024-06-27 20:11:01,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 59 transitions, 330 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 20:11:01,219 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 222 flow [2024-06-27 20:11:01,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=222, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2024-06-27 20:11:01,220 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2024-06-27 20:11:01,220 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 222 flow [2024-06-27 20:11:01,220 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 20:11:01,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:01,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:01,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:11:01,221 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 20:11:01,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:01,221 INFO L85 PathProgramCache]: Analyzing trace with hash -214800678, now seen corresponding path program 1 times [2024-06-27 20:11:01,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:01,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923337832] [2024-06-27 20:11:01,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:01,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:01,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:01,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:01,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:01,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923337832] [2024-06-27 20:11:01,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923337832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:01,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:01,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:11:01,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154875992] [2024-06-27 20:11:01,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:01,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:11:01,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:01,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:11:01,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:11:01,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:11:01,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 222 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 20:11:01,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:01,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:11:01,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:02,310 INFO L124 PetriNetUnfolderBase]: 1883/2794 cut-off events. [2024-06-27 20:11:02,311 INFO L125 PetriNetUnfolderBase]: For 6041/6041 co-relation queries the response was YES. [2024-06-27 20:11:02,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8903 conditions, 2794 events. 1883/2794 cut-off events. For 6041/6041 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12580 event pairs, 763 based on Foata normal form. 6/2799 useless extension candidates. Maximal degree in co-relation 8883. Up to 2725 conditions per place. [2024-06-27 20:11:02,328 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 58 selfloop transitions, 17 changer transitions 0/78 dead transitions. [2024-06-27 20:11:02,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 78 transitions, 492 flow [2024-06-27 20:11:02,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:11:02,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:11:02,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-27 20:11:02,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-27 20:11:02,330 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 222 flow. Second operand 6 states and 110 transitions. [2024-06-27 20:11:02,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 78 transitions, 492 flow [2024-06-27 20:11:02,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 78 transitions, 470 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 20:11:02,334 INFO L231 Difference]: Finished difference. Result has 58 places, 59 transitions, 325 flow [2024-06-27 20:11:02,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=325, PETRI_PLACES=58, PETRI_TRANSITIONS=59} [2024-06-27 20:11:02,337 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-27 20:11:02,337 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 59 transitions, 325 flow [2024-06-27 20:11:02,337 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 20:11:02,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:02,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:02,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:11:02,338 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 20:11:02,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:02,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1001015545, now seen corresponding path program 1 times [2024-06-27 20:11:02,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:02,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174921796] [2024-06-27 20:11:02,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:02,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:02,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:02,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:02,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:02,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174921796] [2024-06-27 20:11:02,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174921796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:02,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:02,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:11:02,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590542102] [2024-06-27 20:11:02,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:02,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:11:02,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:02,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:11:02,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:11:02,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:11:02,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 59 transitions, 325 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 20:11:02,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:02,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:11:02,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:03,300 INFO L124 PetriNetUnfolderBase]: 1698/2614 cut-off events. [2024-06-27 20:11:03,300 INFO L125 PetriNetUnfolderBase]: For 8065/8085 co-relation queries the response was YES. [2024-06-27 20:11:03,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9208 conditions, 2614 events. 1698/2614 cut-off events. For 8065/8085 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12491 event pairs, 669 based on Foata normal form. 6/2604 useless extension candidates. Maximal degree in co-relation 9185. Up to 2456 conditions per place. [2024-06-27 20:11:03,321 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 62 selfloop transitions, 16 changer transitions 0/85 dead transitions. [2024-06-27 20:11:03,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 85 transitions, 603 flow [2024-06-27 20:11:03,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:11:03,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:11:03,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-27 20:11:03,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 20:11:03,322 INFO L175 Difference]: Start difference. First operand has 58 places, 59 transitions, 325 flow. Second operand 6 states and 114 transitions. [2024-06-27 20:11:03,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 85 transitions, 603 flow [2024-06-27 20:11:03,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 85 transitions, 587 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-27 20:11:03,329 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 403 flow [2024-06-27 20:11:03,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=403, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2024-06-27 20:11:03,330 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2024-06-27 20:11:03,330 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 403 flow [2024-06-27 20:11:03,330 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 20:11:03,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:03,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:03,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:11:03,331 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 20:11:03,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:03,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1218991803, now seen corresponding path program 2 times [2024-06-27 20:11:03,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:03,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714849003] [2024-06-27 20:11:03,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:03,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:03,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:03,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:03,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:03,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714849003] [2024-06-27 20:11:03,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714849003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:03,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:03,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:11:03,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832020685] [2024-06-27 20:11:03,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:03,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:11:03,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:03,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:11:03,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:11:03,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:11:03,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 403 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 20:11:03,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:03,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:11:03,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:04,303 INFO L124 PetriNetUnfolderBase]: 1693/2606 cut-off events. [2024-06-27 20:11:04,304 INFO L125 PetriNetUnfolderBase]: For 10161/10175 co-relation queries the response was YES. [2024-06-27 20:11:04,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9743 conditions, 2606 events. 1693/2606 cut-off events. For 10161/10175 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12454 event pairs, 665 based on Foata normal form. 2/2593 useless extension candidates. Maximal degree in co-relation 9717. Up to 2475 conditions per place. [2024-06-27 20:11:04,317 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 62 selfloop transitions, 11 changer transitions 0/80 dead transitions. [2024-06-27 20:11:04,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 80 transitions, 587 flow [2024-06-27 20:11:04,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:11:04,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:11:04,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-27 20:11:04,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349593495934959 [2024-06-27 20:11:04,320 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 403 flow. Second operand 6 states and 107 transitions. [2024-06-27 20:11:04,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 80 transitions, 587 flow [2024-06-27 20:11:04,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 80 transitions, 545 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-27 20:11:04,330 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 391 flow [2024-06-27 20:11:04,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=391, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2024-06-27 20:11:04,330 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-27 20:11:04,330 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 391 flow [2024-06-27 20:11:04,331 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 20:11:04,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:04,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:04,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:11:04,331 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 20:11:04,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:04,332 INFO L85 PathProgramCache]: Analyzing trace with hash -966829285, now seen corresponding path program 1 times [2024-06-27 20:11:04,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:04,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465009913] [2024-06-27 20:11:04,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:04,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:04,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:04,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:04,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:04,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465009913] [2024-06-27 20:11:04,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465009913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:04,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:04,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:11:04,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360881979] [2024-06-27 20:11:04,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:04,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:11:04,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:04,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:11:04,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:11:05,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:11:05,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 391 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:05,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:05,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:11:05,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:05,577 INFO L124 PetriNetUnfolderBase]: 1706/2624 cut-off events. [2024-06-27 20:11:05,577 INFO L125 PetriNetUnfolderBase]: For 11692/11706 co-relation queries the response was YES. [2024-06-27 20:11:05,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9937 conditions, 2624 events. 1706/2624 cut-off events. For 11692/11706 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12535 event pairs, 647 based on Foata normal form. 2/2610 useless extension candidates. Maximal degree in co-relation 9909. Up to 2473 conditions per place. [2024-06-27 20:11:05,589 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 72 selfloop transitions, 14 changer transitions 0/93 dead transitions. [2024-06-27 20:11:05,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 93 transitions, 655 flow [2024-06-27 20:11:05,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:11:05,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:11:05,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-27 20:11:05,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-27 20:11:05,591 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 391 flow. Second operand 7 states and 129 transitions. [2024-06-27 20:11:05,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 93 transitions, 655 flow [2024-06-27 20:11:05,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 93 transitions, 621 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 20:11:05,599 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 427 flow [2024-06-27 20:11:05,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=427, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2024-06-27 20:11:05,600 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 26 predicate places. [2024-06-27 20:11:05,601 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 427 flow [2024-06-27 20:11:05,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:05,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:05,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:05,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:11:05,601 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 20:11:05,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:05,602 INFO L85 PathProgramCache]: Analyzing trace with hash -276398641, now seen corresponding path program 2 times [2024-06-27 20:11:05,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:05,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942089848] [2024-06-27 20:11:05,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:05,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:05,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:06,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:06,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:06,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942089848] [2024-06-27 20:11:06,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942089848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:06,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:06,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:11:06,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055232624] [2024-06-27 20:11:06,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:06,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:11:06,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:06,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:11:06,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:11:06,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:11:06,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 427 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:06,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:06,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:11:06,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:06,712 INFO L124 PetriNetUnfolderBase]: 1717/2641 cut-off events. [2024-06-27 20:11:06,712 INFO L125 PetriNetUnfolderBase]: For 14484/14506 co-relation queries the response was YES. [2024-06-27 20:11:06,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10576 conditions, 2641 events. 1717/2641 cut-off events. For 14484/14506 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12596 event pairs, 651 based on Foata normal form. 6/2630 useless extension candidates. Maximal degree in co-relation 10548. Up to 2442 conditions per place. [2024-06-27 20:11:06,724 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 65 selfloop transitions, 26 changer transitions 0/98 dead transitions. [2024-06-27 20:11:06,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 98 transitions, 773 flow [2024-06-27 20:11:06,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:11:06,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:11:06,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-27 20:11:06,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45993031358885017 [2024-06-27 20:11:06,726 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 427 flow. Second operand 7 states and 132 transitions. [2024-06-27 20:11:06,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 98 transitions, 773 flow [2024-06-27 20:11:06,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 98 transitions, 727 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 20:11:06,733 INFO L231 Difference]: Finished difference. Result has 70 places, 74 transitions, 515 flow [2024-06-27 20:11:06,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=515, PETRI_PLACES=70, PETRI_TRANSITIONS=74} [2024-06-27 20:11:06,735 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2024-06-27 20:11:06,735 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 74 transitions, 515 flow [2024-06-27 20:11:06,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:06,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:06,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:06,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:11:06,736 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 20:11:06,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:06,736 INFO L85 PathProgramCache]: Analyzing trace with hash -442343717, now seen corresponding path program 1 times [2024-06-27 20:11:06,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:06,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205853449] [2024-06-27 20:11:06,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:06,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:06,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:07,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:07,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:07,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205853449] [2024-06-27 20:11:07,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205853449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:07,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:07,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:11:07,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431531070] [2024-06-27 20:11:07,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:07,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:11:07,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:07,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:11:07,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:11:07,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:11:07,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 74 transitions, 515 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 20:11:07,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:07,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:11:07,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:07,815 INFO L124 PetriNetUnfolderBase]: 1995/2956 cut-off events. [2024-06-27 20:11:07,816 INFO L125 PetriNetUnfolderBase]: For 21015/21015 co-relation queries the response was YES. [2024-06-27 20:11:07,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12657 conditions, 2956 events. 1995/2956 cut-off events. For 21015/21015 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 13432 event pairs, 682 based on Foata normal form. 6/2959 useless extension candidates. Maximal degree in co-relation 12628. Up to 2763 conditions per place. [2024-06-27 20:11:07,831 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 92 selfloop transitions, 28 changer transitions 0/123 dead transitions. [2024-06-27 20:11:07,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 123 transitions, 1049 flow [2024-06-27 20:11:07,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:11:07,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:11:07,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-27 20:11:07,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738675958188153 [2024-06-27 20:11:07,834 INFO L175 Difference]: Start difference. First operand has 70 places, 74 transitions, 515 flow. Second operand 7 states and 136 transitions. [2024-06-27 20:11:07,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 123 transitions, 1049 flow [2024-06-27 20:11:07,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 123 transitions, 1003 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 20:11:07,848 INFO L231 Difference]: Finished difference. Result has 77 places, 91 transitions, 694 flow [2024-06-27 20:11:07,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=694, PETRI_PLACES=77, PETRI_TRANSITIONS=91} [2024-06-27 20:11:07,849 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 35 predicate places. [2024-06-27 20:11:07,849 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 91 transitions, 694 flow [2024-06-27 20:11:07,849 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 20:11:07,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:07,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:07,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:11:07,850 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 20:11:07,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:07,850 INFO L85 PathProgramCache]: Analyzing trace with hash 865961465, now seen corresponding path program 2 times [2024-06-27 20:11:07,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:07,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891292115] [2024-06-27 20:11:07,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:07,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:07,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:08,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:08,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:08,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891292115] [2024-06-27 20:11:08,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891292115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:08,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:08,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:11:08,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024144488] [2024-06-27 20:11:08,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:08,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:11:08,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:08,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:11:08,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:11:08,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:11:08,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 91 transitions, 694 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 20:11:08,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:08,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:11:08,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:09,021 INFO L124 PetriNetUnfolderBase]: 2031/3006 cut-off events. [2024-06-27 20:11:09,022 INFO L125 PetriNetUnfolderBase]: For 26421/26421 co-relation queries the response was YES. [2024-06-27 20:11:09,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14318 conditions, 3006 events. 2031/3006 cut-off events. For 26421/26421 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13621 event pairs, 706 based on Foata normal form. 6/3011 useless extension candidates. Maximal degree in co-relation 14284. Up to 2868 conditions per place. [2024-06-27 20:11:09,041 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 99 selfloop transitions, 23 changer transitions 0/125 dead transitions. [2024-06-27 20:11:09,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 125 transitions, 1189 flow [2024-06-27 20:11:09,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:11:09,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:11:09,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-27 20:11:09,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-27 20:11:09,043 INFO L175 Difference]: Start difference. First operand has 77 places, 91 transitions, 694 flow. Second operand 7 states and 129 transitions. [2024-06-27 20:11:09,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 125 transitions, 1189 flow [2024-06-27 20:11:09,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 125 transitions, 1145 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-27 20:11:09,060 INFO L231 Difference]: Finished difference. Result has 84 places, 98 transitions, 795 flow [2024-06-27 20:11:09,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=795, PETRI_PLACES=84, PETRI_TRANSITIONS=98} [2024-06-27 20:11:09,061 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 42 predicate places. [2024-06-27 20:11:09,061 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 98 transitions, 795 flow [2024-06-27 20:11:09,061 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 20:11:09,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:09,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:09,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:11:09,062 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 20:11:09,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:09,062 INFO L85 PathProgramCache]: Analyzing trace with hash -264975047, now seen corresponding path program 3 times [2024-06-27 20:11:09,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:09,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670816062] [2024-06-27 20:11:09,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:09,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:09,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:09,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:09,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:09,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670816062] [2024-06-27 20:11:09,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670816062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:09,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:09,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:11:09,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935121712] [2024-06-27 20:11:09,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:09,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:11:09,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:09,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:11:09,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:11:09,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:11:09,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 98 transitions, 795 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 20:11:09,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:09,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:11:09,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:10,182 INFO L124 PetriNetUnfolderBase]: 2035/3012 cut-off events. [2024-06-27 20:11:10,182 INFO L125 PetriNetUnfolderBase]: For 30702/30702 co-relation queries the response was YES. [2024-06-27 20:11:10,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14903 conditions, 3012 events. 2035/3012 cut-off events. For 30702/30702 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13633 event pairs, 702 based on Foata normal form. 6/3017 useless extension candidates. Maximal degree in co-relation 14865. Up to 2937 conditions per place. [2024-06-27 20:11:10,197 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 102 selfloop transitions, 21 changer transitions 0/126 dead transitions. [2024-06-27 20:11:10,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 126 transitions, 1208 flow [2024-06-27 20:11:10,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:11:10,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:11:10,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 20:11:10,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355400696864111 [2024-06-27 20:11:10,199 INFO L175 Difference]: Start difference. First operand has 84 places, 98 transitions, 795 flow. Second operand 7 states and 125 transitions. [2024-06-27 20:11:10,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 126 transitions, 1208 flow [2024-06-27 20:11:10,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 126 transitions, 1163 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 20:11:10,216 INFO L231 Difference]: Finished difference. Result has 89 places, 104 transitions, 880 flow [2024-06-27 20:11:10,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=751, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=880, PETRI_PLACES=89, PETRI_TRANSITIONS=104} [2024-06-27 20:11:10,217 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-27 20:11:10,217 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 104 transitions, 880 flow [2024-06-27 20:11:10,217 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 20:11:10,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:10,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:10,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:11:10,217 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:10,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:10,218 INFO L85 PathProgramCache]: Analyzing trace with hash -265212383, now seen corresponding path program 3 times [2024-06-27 20:11:10,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:10,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554726837] [2024-06-27 20:11:10,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:10,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:10,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:10,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:10,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:10,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554726837] [2024-06-27 20:11:10,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554726837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:10,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:10,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:11:10,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805919844] [2024-06-27 20:11:10,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:10,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:11:10,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:10,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:11:10,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:11:10,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:11:10,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 104 transitions, 880 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:10,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:10,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:11:10,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:11,248 INFO L124 PetriNetUnfolderBase]: 1861/2835 cut-off events. [2024-06-27 20:11:11,264 INFO L125 PetriNetUnfolderBase]: For 29788/29816 co-relation queries the response was YES. [2024-06-27 20:11:11,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14137 conditions, 2835 events. 1861/2835 cut-off events. For 29788/29816 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13375 event pairs, 612 based on Foata normal form. 2/2811 useless extension candidates. Maximal degree in co-relation 14097. Up to 2674 conditions per place. [2024-06-27 20:11:11,288 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 94 selfloop transitions, 14 changer transitions 0/123 dead transitions. [2024-06-27 20:11:11,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 123 transitions, 1144 flow [2024-06-27 20:11:11,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:11:11,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:11:11,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 20:11:11,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:11:11,299 INFO L175 Difference]: Start difference. First operand has 89 places, 104 transitions, 880 flow. Second operand 7 states and 123 transitions. [2024-06-27 20:11:11,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 123 transitions, 1144 flow [2024-06-27 20:11:11,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 123 transitions, 1071 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 20:11:11,318 INFO L231 Difference]: Finished difference. Result has 92 places, 104 transitions, 843 flow [2024-06-27 20:11:11,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=843, PETRI_PLACES=92, PETRI_TRANSITIONS=104} [2024-06-27 20:11:11,319 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-06-27 20:11:11,319 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 104 transitions, 843 flow [2024-06-27 20:11:11,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:11,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:11,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:11,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:11:11,320 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 20:11:11,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:11,320 INFO L85 PathProgramCache]: Analyzing trace with hash -269723287, now seen corresponding path program 1 times [2024-06-27 20:11:11,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:11,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314172208] [2024-06-27 20:11:11,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:11,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:11,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:12,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:12,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:12,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314172208] [2024-06-27 20:11:12,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314172208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:12,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:12,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:12,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128478681] [2024-06-27 20:11:12,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:12,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:12,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:12,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:12,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:12,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:11:12,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 104 transitions, 843 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:12,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:12,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:11:12,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:13,050 INFO L124 PetriNetUnfolderBase]: 2033/3010 cut-off events. [2024-06-27 20:11:13,050 INFO L125 PetriNetUnfolderBase]: For 36837/36837 co-relation queries the response was YES. [2024-06-27 20:11:13,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15411 conditions, 3010 events. 2033/3010 cut-off events. For 36837/36837 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13662 event pairs, 679 based on Foata normal form. 6/3015 useless extension candidates. Maximal degree in co-relation 15370. Up to 2915 conditions per place. [2024-06-27 20:11:13,072 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 101 selfloop transitions, 25 changer transitions 0/129 dead transitions. [2024-06-27 20:11:13,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 129 transitions, 1245 flow [2024-06-27 20:11:13,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:11:13,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:11:13,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 20:11:13,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 20:11:13,074 INFO L175 Difference]: Start difference. First operand has 92 places, 104 transitions, 843 flow. Second operand 7 states and 126 transitions. [2024-06-27 20:11:13,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 129 transitions, 1245 flow [2024-06-27 20:11:13,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 129 transitions, 1201 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 20:11:13,092 INFO L231 Difference]: Finished difference. Result has 93 places, 107 transitions, 903 flow [2024-06-27 20:11:13,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=799, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=903, PETRI_PLACES=93, PETRI_TRANSITIONS=107} [2024-06-27 20:11:13,093 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 51 predicate places. [2024-06-27 20:11:13,093 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 107 transitions, 903 flow [2024-06-27 20:11:13,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:13,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:13,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:13,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:11:13,094 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:13,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:13,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1426632991, now seen corresponding path program 1 times [2024-06-27 20:11:13,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:13,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201887997] [2024-06-27 20:11:13,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:13,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:13,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:13,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:13,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:13,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201887997] [2024-06-27 20:11:13,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201887997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:13,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:13,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:11:13,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671131431] [2024-06-27 20:11:13,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:13,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:11:13,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:13,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:11:13,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:11:13,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:11:13,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 107 transitions, 903 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 20:11:13,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:13,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:11:13,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:13,925 INFO L124 PetriNetUnfolderBase]: 1903/2879 cut-off events. [2024-06-27 20:11:13,925 INFO L125 PetriNetUnfolderBase]: For 40032/40032 co-relation queries the response was YES. [2024-06-27 20:11:13,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15323 conditions, 2879 events. 1903/2879 cut-off events. For 40032/40032 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13469 event pairs, 703 based on Foata normal form. 1/2879 useless extension candidates. Maximal degree in co-relation 15281. Up to 2769 conditions per place. [2024-06-27 20:11:13,942 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 94 selfloop transitions, 8 changer transitions 0/115 dead transitions. [2024-06-27 20:11:13,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 115 transitions, 1127 flow [2024-06-27 20:11:13,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:11:13,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:11:13,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-06-27 20:11:13,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424390243902439 [2024-06-27 20:11:13,943 INFO L175 Difference]: Start difference. First operand has 93 places, 107 transitions, 903 flow. Second operand 5 states and 87 transitions. [2024-06-27 20:11:13,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 115 transitions, 1127 flow [2024-06-27 20:11:13,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 115 transitions, 1039 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 20:11:13,966 INFO L231 Difference]: Finished difference. Result has 93 places, 107 transitions, 837 flow [2024-06-27 20:11:13,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=837, PETRI_PLACES=93, PETRI_TRANSITIONS=107} [2024-06-27 20:11:13,967 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 51 predicate places. [2024-06-27 20:11:13,967 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 107 transitions, 837 flow [2024-06-27 20:11:13,967 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 20:11:13,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:13,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:13,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:11:13,967 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 20:11:13,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:13,968 INFO L85 PathProgramCache]: Analyzing trace with hash -831566846, now seen corresponding path program 1 times [2024-06-27 20:11:13,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:13,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616960292] [2024-06-27 20:11:13,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:13,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:13,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:14,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:14,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:14,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616960292] [2024-06-27 20:11:14,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616960292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:14,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:14,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:14,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371837708] [2024-06-27 20:11:14,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:14,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:14,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:14,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:14,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:14,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:11:14,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 107 transitions, 837 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 20:11:14,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:14,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:11:14,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:15,510 INFO L124 PetriNetUnfolderBase]: 1889/2870 cut-off events. [2024-06-27 20:11:15,510 INFO L125 PetriNetUnfolderBase]: For 42902/42918 co-relation queries the response was YES. [2024-06-27 20:11:15,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15296 conditions, 2870 events. 1889/2870 cut-off events. For 42902/42918 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13517 event pairs, 618 based on Foata normal form. 7/2865 useless extension candidates. Maximal degree in co-relation 15253. Up to 2660 conditions per place. [2024-06-27 20:11:15,525 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 110 selfloop transitions, 20 changer transitions 0/146 dead transitions. [2024-06-27 20:11:15,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 146 transitions, 1237 flow [2024-06-27 20:11:15,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:11:15,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:11:15,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:11:15,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:11:15,527 INFO L175 Difference]: Start difference. First operand has 93 places, 107 transitions, 837 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:11:15,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 146 transitions, 1237 flow [2024-06-27 20:11:15,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 146 transitions, 1215 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 20:11:15,547 INFO L231 Difference]: Finished difference. Result has 98 places, 110 transitions, 918 flow [2024-06-27 20:11:15,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=918, PETRI_PLACES=98, PETRI_TRANSITIONS=110} [2024-06-27 20:11:15,547 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2024-06-27 20:11:15,547 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 110 transitions, 918 flow [2024-06-27 20:11:15,547 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 20:11:15,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:15,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:15,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:11:15,548 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 20:11:15,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:15,548 INFO L85 PathProgramCache]: Analyzing trace with hash 21434265, now seen corresponding path program 1 times [2024-06-27 20:11:15,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:15,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935020545] [2024-06-27 20:11:15,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:15,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:15,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:16,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:16,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:16,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935020545] [2024-06-27 20:11:16,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935020545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:16,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:16,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:16,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119301936] [2024-06-27 20:11:16,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:16,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:16,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:16,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:16,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:16,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:11:16,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 110 transitions, 918 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:16,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:16,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:11:16,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:16,845 INFO L124 PetriNetUnfolderBase]: 2101/3107 cut-off events. [2024-06-27 20:11:16,845 INFO L125 PetriNetUnfolderBase]: For 50608/50608 co-relation queries the response was YES. [2024-06-27 20:11:16,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17223 conditions, 3107 events. 2101/3107 cut-off events. For 50608/50608 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 14128 event pairs, 665 based on Foata normal form. 6/3112 useless extension candidates. Maximal degree in co-relation 17180. Up to 2996 conditions per place. [2024-06-27 20:11:16,860 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 125 selfloop transitions, 27 changer transitions 0/155 dead transitions. [2024-06-27 20:11:16,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 155 transitions, 1534 flow [2024-06-27 20:11:16,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:11:16,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:11:16,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 20:11:16,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-27 20:11:16,863 INFO L175 Difference]: Start difference. First operand has 98 places, 110 transitions, 918 flow. Second operand 8 states and 149 transitions. [2024-06-27 20:11:16,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 155 transitions, 1534 flow [2024-06-27 20:11:16,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 155 transitions, 1457 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 20:11:16,888 INFO L231 Difference]: Finished difference. Result has 101 places, 121 transitions, 1055 flow [2024-06-27 20:11:16,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=841, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1055, PETRI_PLACES=101, PETRI_TRANSITIONS=121} [2024-06-27 20:11:16,889 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-06-27 20:11:16,889 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 121 transitions, 1055 flow [2024-06-27 20:11:16,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:16,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:16,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:16,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:11:16,890 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 20:11:16,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:16,890 INFO L85 PathProgramCache]: Analyzing trace with hash -827757411, now seen corresponding path program 2 times [2024-06-27 20:11:16,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:16,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878402992] [2024-06-27 20:11:16,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:16,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:16,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:17,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:17,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:17,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878402992] [2024-06-27 20:11:17,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878402992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:17,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:17,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:17,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131130601] [2024-06-27 20:11:17,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:17,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:17,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:17,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:17,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:17,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:11:17,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 121 transitions, 1055 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:17,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:17,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:11:17,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:18,222 INFO L124 PetriNetUnfolderBase]: 2217/3274 cut-off events. [2024-06-27 20:11:18,223 INFO L125 PetriNetUnfolderBase]: For 61300/61303 co-relation queries the response was YES. [2024-06-27 20:11:18,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19329 conditions, 3274 events. 2217/3274 cut-off events. For 61300/61303 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 14998 event pairs, 657 based on Foata normal form. 8/3279 useless extension candidates. Maximal degree in co-relation 19283. Up to 2796 conditions per place. [2024-06-27 20:11:18,243 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 114 selfloop transitions, 54 changer transitions 0/171 dead transitions. [2024-06-27 20:11:18,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 171 transitions, 1917 flow [2024-06-27 20:11:18,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:11:18,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:11:18,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 20:11:18,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4817073170731707 [2024-06-27 20:11:18,246 INFO L175 Difference]: Start difference. First operand has 101 places, 121 transitions, 1055 flow. Second operand 8 states and 158 transitions. [2024-06-27 20:11:18,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 171 transitions, 1917 flow [2024-06-27 20:11:18,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 171 transitions, 1799 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-27 20:11:18,282 INFO L231 Difference]: Finished difference. Result has 106 places, 132 transitions, 1211 flow [2024-06-27 20:11:18,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=937, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1211, PETRI_PLACES=106, PETRI_TRANSITIONS=132} [2024-06-27 20:11:18,283 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 64 predicate places. [2024-06-27 20:11:18,283 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 132 transitions, 1211 flow [2024-06-27 20:11:18,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:18,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:18,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:18,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:11:18,284 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 20:11:18,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:18,284 INFO L85 PathProgramCache]: Analyzing trace with hash 21578260, now seen corresponding path program 2 times [2024-06-27 20:11:18,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:18,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263583281] [2024-06-27 20:11:18,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:18,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:18,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:19,030 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 20:11:19,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:19,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263583281] [2024-06-27 20:11:19,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263583281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:19,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:19,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:19,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008025083] [2024-06-27 20:11:19,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:19,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:19,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:19,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:19,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:19,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:11:19,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 132 transitions, 1211 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 20:11:19,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:19,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:11:19,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:19,529 INFO L124 PetriNetUnfolderBase]: 2099/3160 cut-off events. [2024-06-27 20:11:19,529 INFO L125 PetriNetUnfolderBase]: For 68140/68167 co-relation queries the response was YES. [2024-06-27 20:11:19,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19603 conditions, 3160 events. 2099/3160 cut-off events. For 68140/68167 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 14897 event pairs, 638 based on Foata normal form. 14/3161 useless extension candidates. Maximal degree in co-relation 19555. Up to 2897 conditions per place. [2024-06-27 20:11:19,550 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 110 selfloop transitions, 29 changer transitions 0/161 dead transitions. [2024-06-27 20:11:19,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 161 transitions, 1617 flow [2024-06-27 20:11:19,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:11:19,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:11:19,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 20:11:19,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-27 20:11:19,552 INFO L175 Difference]: Start difference. First operand has 106 places, 132 transitions, 1211 flow. Second operand 8 states and 146 transitions. [2024-06-27 20:11:19,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 161 transitions, 1617 flow [2024-06-27 20:11:19,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 161 transitions, 1502 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-27 20:11:19,591 INFO L231 Difference]: Finished difference. Result has 111 places, 135 transitions, 1230 flow [2024-06-27 20:11:19,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1096, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1230, PETRI_PLACES=111, PETRI_TRANSITIONS=135} [2024-06-27 20:11:19,591 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 69 predicate places. [2024-06-27 20:11:19,592 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 135 transitions, 1230 flow [2024-06-27 20:11:19,592 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 20:11:19,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:19,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:19,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:11:19,593 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:19,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:19,593 INFO L85 PathProgramCache]: Analyzing trace with hash 96789581, now seen corresponding path program 3 times [2024-06-27 20:11:19,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:19,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437615107] [2024-06-27 20:11:19,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:19,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:19,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:20,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:20,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:20,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437615107] [2024-06-27 20:11:20,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437615107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:20,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:20,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:20,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857716489] [2024-06-27 20:11:20,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:20,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:20,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:20,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:20,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:20,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:11:20,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 135 transitions, 1230 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:20,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:20,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:11:20,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:20,818 INFO L124 PetriNetUnfolderBase]: 2232/3296 cut-off events. [2024-06-27 20:11:20,819 INFO L125 PetriNetUnfolderBase]: For 74172/74175 co-relation queries the response was YES. [2024-06-27 20:11:20,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20427 conditions, 3296 events. 2232/3296 cut-off events. For 74172/74175 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 15100 event pairs, 651 based on Foata normal form. 8/3301 useless extension candidates. Maximal degree in co-relation 20377. Up to 2821 conditions per place. [2024-06-27 20:11:20,840 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 110 selfloop transitions, 62 changer transitions 0/175 dead transitions. [2024-06-27 20:11:20,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 175 transitions, 1941 flow [2024-06-27 20:11:20,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:11:20,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:11:20,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 20:11:20,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-27 20:11:20,842 INFO L175 Difference]: Start difference. First operand has 111 places, 135 transitions, 1230 flow. Second operand 8 states and 156 transitions. [2024-06-27 20:11:20,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 175 transitions, 1941 flow [2024-06-27 20:11:20,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 175 transitions, 1831 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 20:11:20,891 INFO L231 Difference]: Finished difference. Result has 113 places, 139 transitions, 1314 flow [2024-06-27 20:11:20,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1120, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1314, PETRI_PLACES=113, PETRI_TRANSITIONS=139} [2024-06-27 20:11:20,891 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-27 20:11:20,892 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 139 transitions, 1314 flow [2024-06-27 20:11:20,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:20,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:20,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:20,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 20:11:20,892 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 20:11:20,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:20,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1082621924, now seen corresponding path program 1 times [2024-06-27 20:11:20,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:20,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630434177] [2024-06-27 20:11:20,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:20,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:20,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:21,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:21,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:21,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630434177] [2024-06-27 20:11:21,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630434177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:21,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:21,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:21,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808056029] [2024-06-27 20:11:21,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:21,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:21,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:21,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:21,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:21,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:11:21,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 139 transitions, 1314 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:21,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:21,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:11:21,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:22,469 INFO L124 PetriNetUnfolderBase]: 2234/3297 cut-off events. [2024-06-27 20:11:22,469 INFO L125 PetriNetUnfolderBase]: For 79564/79564 co-relation queries the response was YES. [2024-06-27 20:11:22,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20962 conditions, 3297 events. 2234/3297 cut-off events. For 79564/79564 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 15099 event pairs, 672 based on Foata normal form. 3/3299 useless extension candidates. Maximal degree in co-relation 20911. Up to 3191 conditions per place. [2024-06-27 20:11:22,490 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 131 selfloop transitions, 30 changer transitions 0/164 dead transitions. [2024-06-27 20:11:22,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 164 transitions, 1794 flow [2024-06-27 20:11:22,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:11:22,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:11:22,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 20:11:22,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 20:11:22,491 INFO L175 Difference]: Start difference. First operand has 113 places, 139 transitions, 1314 flow. Second operand 7 states and 126 transitions. [2024-06-27 20:11:22,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 164 transitions, 1794 flow [2024-06-27 20:11:22,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 164 transitions, 1657 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 20:11:22,537 INFO L231 Difference]: Finished difference. Result has 115 places, 143 transitions, 1321 flow [2024-06-27 20:11:22,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1177, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1321, PETRI_PLACES=115, PETRI_TRANSITIONS=143} [2024-06-27 20:11:22,538 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 73 predicate places. [2024-06-27 20:11:22,538 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 143 transitions, 1321 flow [2024-06-27 20:11:22,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:22,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:22,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:22,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 20:11:22,539 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 20:11:22,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:22,539 INFO L85 PathProgramCache]: Analyzing trace with hash 228237435, now seen corresponding path program 4 times [2024-06-27 20:11:22,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:22,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779554625] [2024-06-27 20:11:22,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:22,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:22,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:23,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:23,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:23,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779554625] [2024-06-27 20:11:23,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779554625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:23,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:23,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:23,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646359328] [2024-06-27 20:11:23,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:23,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:23,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:23,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:23,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:23,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:11:23,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 143 transitions, 1321 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:23,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:23,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:11:23,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:23,795 INFO L124 PetriNetUnfolderBase]: 2270/3349 cut-off events. [2024-06-27 20:11:23,795 INFO L125 PetriNetUnfolderBase]: For 86351/86351 co-relation queries the response was YES. [2024-06-27 20:11:23,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21671 conditions, 3349 events. 2270/3349 cut-off events. For 86351/86351 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 15385 event pairs, 669 based on Foata normal form. 6/3354 useless extension candidates. Maximal degree in co-relation 21619. Up to 3242 conditions per place. [2024-06-27 20:11:23,819 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 145 selfloop transitions, 25 changer transitions 0/173 dead transitions. [2024-06-27 20:11:23,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 173 transitions, 1843 flow [2024-06-27 20:11:23,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:11:23,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:11:23,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 20:11:23,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-27 20:11:23,820 INFO L175 Difference]: Start difference. First operand has 115 places, 143 transitions, 1321 flow. Second operand 8 states and 141 transitions. [2024-06-27 20:11:23,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 173 transitions, 1843 flow [2024-06-27 20:11:23,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 173 transitions, 1749 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 20:11:23,872 INFO L231 Difference]: Finished difference. Result has 118 places, 147 transitions, 1364 flow [2024-06-27 20:11:23,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1227, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1364, PETRI_PLACES=118, PETRI_TRANSITIONS=147} [2024-06-27 20:11:23,873 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 76 predicate places. [2024-06-27 20:11:23,873 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 147 transitions, 1364 flow [2024-06-27 20:11:23,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:23,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:23,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:23,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 20:11:23,874 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 20:11:23,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:23,874 INFO L85 PathProgramCache]: Analyzing trace with hash 368352413, now seen corresponding path program 5 times [2024-06-27 20:11:23,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:23,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887455769] [2024-06-27 20:11:23,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:23,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:23,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:24,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:24,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:24,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887455769] [2024-06-27 20:11:24,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887455769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:24,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:24,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:24,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46376277] [2024-06-27 20:11:24,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:24,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:24,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:24,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:24,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:24,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:11:24,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 147 transitions, 1364 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:24,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:24,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:11:24,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:25,024 INFO L124 PetriNetUnfolderBase]: 2306/3401 cut-off events. [2024-06-27 20:11:25,024 INFO L125 PetriNetUnfolderBase]: For 93859/93859 co-relation queries the response was YES. [2024-06-27 20:11:25,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22389 conditions, 3401 events. 2306/3401 cut-off events. For 93859/93859 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 15632 event pairs, 668 based on Foata normal form. 6/3406 useless extension candidates. Maximal degree in co-relation 22336. Up to 3130 conditions per place. [2024-06-27 20:11:25,048 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 143 selfloop transitions, 37 changer transitions 0/183 dead transitions. [2024-06-27 20:11:25,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 183 transitions, 2128 flow [2024-06-27 20:11:25,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:11:25,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:11:25,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 20:11:25,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-27 20:11:25,050 INFO L175 Difference]: Start difference. First operand has 118 places, 147 transitions, 1364 flow. Second operand 8 states and 147 transitions. [2024-06-27 20:11:25,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 183 transitions, 2128 flow [2024-06-27 20:11:25,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 183 transitions, 2027 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 20:11:25,110 INFO L231 Difference]: Finished difference. Result has 121 places, 152 transitions, 1467 flow [2024-06-27 20:11:25,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1263, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1467, PETRI_PLACES=121, PETRI_TRANSITIONS=152} [2024-06-27 20:11:25,110 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2024-06-27 20:11:25,111 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 152 transitions, 1467 flow [2024-06-27 20:11:25,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:25,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:25,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:25,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 20:11:25,111 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:25,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:25,112 INFO L85 PathProgramCache]: Analyzing trace with hash -683867036, now seen corresponding path program 3 times [2024-06-27 20:11:25,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:25,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190327103] [2024-06-27 20:11:25,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:25,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:25,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:25,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:25,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:25,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190327103] [2024-06-27 20:11:25,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190327103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:25,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:25,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:25,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776271869] [2024-06-27 20:11:25,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:25,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:25,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:25,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:25,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:25,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:11:26,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 152 transitions, 1467 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 20:11:26,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:26,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:11:26,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:26,552 INFO L124 PetriNetUnfolderBase]: 2161/3254 cut-off events. [2024-06-27 20:11:26,553 INFO L125 PetriNetUnfolderBase]: For 98545/98574 co-relation queries the response was YES. [2024-06-27 20:11:26,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21907 conditions, 3254 events. 2161/3254 cut-off events. For 98545/98574 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 15444 event pairs, 623 based on Foata normal form. 7/3249 useless extension candidates. Maximal degree in co-relation 21852. Up to 3034 conditions per place. [2024-06-27 20:11:26,577 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 135 selfloop transitions, 17 changer transitions 0/178 dead transitions. [2024-06-27 20:11:26,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 178 transitions, 1907 flow [2024-06-27 20:11:26,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:11:26,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:11:26,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 20:11:26,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-27 20:11:26,579 INFO L175 Difference]: Start difference. First operand has 121 places, 152 transitions, 1467 flow. Second operand 8 states and 139 transitions. [2024-06-27 20:11:26,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 178 transitions, 1907 flow [2024-06-27 20:11:26,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 178 transitions, 1723 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-27 20:11:26,646 INFO L231 Difference]: Finished difference. Result has 122 places, 155 transitions, 1409 flow [2024-06-27 20:11:26,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1283, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1409, PETRI_PLACES=122, PETRI_TRANSITIONS=155} [2024-06-27 20:11:26,647 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 80 predicate places. [2024-06-27 20:11:26,647 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 155 transitions, 1409 flow [2024-06-27 20:11:26,647 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 20:11:26,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:26,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:26,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 20:11:26,648 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:26,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:26,648 INFO L85 PathProgramCache]: Analyzing trace with hash -683861301, now seen corresponding path program 6 times [2024-06-27 20:11:26,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:26,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943332315] [2024-06-27 20:11:26,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:26,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:26,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:27,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:27,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:27,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943332315] [2024-06-27 20:11:27,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943332315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:27,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:27,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:27,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544492779] [2024-06-27 20:11:27,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:27,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:27,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:27,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:27,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:27,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:11:27,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 155 transitions, 1409 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:27,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:27,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:11:27,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:27,895 INFO L124 PetriNetUnfolderBase]: 2305/3400 cut-off events. [2024-06-27 20:11:27,895 INFO L125 PetriNetUnfolderBase]: For 107089/107089 co-relation queries the response was YES. [2024-06-27 20:11:27,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22780 conditions, 3400 events. 2305/3400 cut-off events. For 107089/107089 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 15603 event pairs, 673 based on Foata normal form. 6/3405 useless extension candidates. Maximal degree in co-relation 22725. Up to 3132 conditions per place. [2024-06-27 20:11:27,918 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 143 selfloop transitions, 41 changer transitions 0/187 dead transitions. [2024-06-27 20:11:27,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 187 transitions, 2026 flow [2024-06-27 20:11:27,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:11:27,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:11:27,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 20:11:27,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-27 20:11:27,920 INFO L175 Difference]: Start difference. First operand has 122 places, 155 transitions, 1409 flow. Second operand 8 states and 146 transitions. [2024-06-27 20:11:27,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 187 transitions, 2026 flow [2024-06-27 20:11:27,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 187 transitions, 1924 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-27 20:11:27,980 INFO L231 Difference]: Finished difference. Result has 124 places, 159 transitions, 1475 flow [2024-06-27 20:11:27,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1307, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1475, PETRI_PLACES=124, PETRI_TRANSITIONS=159} [2024-06-27 20:11:27,981 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 82 predicate places. [2024-06-27 20:11:27,981 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 159 transitions, 1475 flow [2024-06-27 20:11:27,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:27,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:27,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:27,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 20:11:27,982 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 20:11:27,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:27,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1275947971, now seen corresponding path program 1 times [2024-06-27 20:11:27,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:27,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739158570] [2024-06-27 20:11:27,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:27,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:27,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:28,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:28,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:28,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739158570] [2024-06-27 20:11:28,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739158570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:28,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:28,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:11:28,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761161790] [2024-06-27 20:11:28,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:28,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:11:28,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:28,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:11:28,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:11:28,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:11:28,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 159 transitions, 1475 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 20:11:28,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:28,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:11:28,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:29,057 INFO L124 PetriNetUnfolderBase]: 2142/3210 cut-off events. [2024-06-27 20:11:29,057 INFO L125 PetriNetUnfolderBase]: For 112312/112333 co-relation queries the response was YES. [2024-06-27 20:11:29,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22204 conditions, 3210 events. 2142/3210 cut-off events. For 112312/112333 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 14964 event pairs, 661 based on Foata normal form. 8/3191 useless extension candidates. Maximal degree in co-relation 22148. Up to 3083 conditions per place. [2024-06-27 20:11:29,080 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 148 selfloop transitions, 11 changer transitions 0/173 dead transitions. [2024-06-27 20:11:29,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 173 transitions, 1847 flow [2024-06-27 20:11:29,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:11:29,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:11:29,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-27 20:11:29,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 20:11:29,081 INFO L175 Difference]: Start difference. First operand has 124 places, 159 transitions, 1475 flow. Second operand 6 states and 102 transitions. [2024-06-27 20:11:29,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 173 transitions, 1847 flow [2024-06-27 20:11:29,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 173 transitions, 1733 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 20:11:29,136 INFO L231 Difference]: Finished difference. Result has 125 places, 162 transitions, 1423 flow [2024-06-27 20:11:29,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1361, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1423, PETRI_PLACES=125, PETRI_TRANSITIONS=162} [2024-06-27 20:11:29,136 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-27 20:11:29,136 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 162 transitions, 1423 flow [2024-06-27 20:11:29,137 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 20:11:29,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:29,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:29,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 20:11:29,137 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:29,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:29,138 INFO L85 PathProgramCache]: Analyzing trace with hash -8827330, now seen corresponding path program 1 times [2024-06-27 20:11:29,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:29,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775876197] [2024-06-27 20:11:29,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:29,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:29,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:29,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:29,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775876197] [2024-06-27 20:11:29,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775876197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:29,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:29,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:11:29,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041855996] [2024-06-27 20:11:29,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:29,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:11:29,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:29,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:11:29,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:11:30,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:11:30,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 162 transitions, 1423 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:30,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:30,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:11:30,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:30,747 INFO L124 PetriNetUnfolderBase]: 2194/3308 cut-off events. [2024-06-27 20:11:30,747 INFO L125 PetriNetUnfolderBase]: For 119100/119133 co-relation queries the response was YES. [2024-06-27 20:11:30,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23074 conditions, 3308 events. 2194/3308 cut-off events. For 119100/119133 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 15856 event pairs, 464 based on Foata normal form. 9/3305 useless extension candidates. Maximal degree in co-relation 23017. Up to 2973 conditions per place. [2024-06-27 20:11:30,770 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 158 selfloop transitions, 25 changer transitions 0/210 dead transitions. [2024-06-27 20:11:30,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 210 transitions, 2155 flow [2024-06-27 20:11:30,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:11:30,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:11:30,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-27 20:11:30,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44878048780487806 [2024-06-27 20:11:30,772 INFO L175 Difference]: Start difference. First operand has 125 places, 162 transitions, 1423 flow. Second operand 10 states and 184 transitions. [2024-06-27 20:11:30,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 210 transitions, 2155 flow [2024-06-27 20:11:30,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 210 transitions, 2113 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 20:11:30,832 INFO L231 Difference]: Finished difference. Result has 131 places, 166 transitions, 1594 flow [2024-06-27 20:11:30,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1381, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1594, PETRI_PLACES=131, PETRI_TRANSITIONS=166} [2024-06-27 20:11:30,833 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 89 predicate places. [2024-06-27 20:11:30,833 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 166 transitions, 1594 flow [2024-06-27 20:11:30,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:30,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:30,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:30,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 20:11:30,833 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 20:11:30,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:30,834 INFO L85 PathProgramCache]: Analyzing trace with hash 941014812, now seen corresponding path program 2 times [2024-06-27 20:11:30,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:30,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475528063] [2024-06-27 20:11:30,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:30,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:30,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:31,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:31,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:31,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475528063] [2024-06-27 20:11:31,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475528063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:31,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:31,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:11:31,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257646823] [2024-06-27 20:11:31,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:31,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:11:31,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:31,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:11:31,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:11:31,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:11:31,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 166 transitions, 1594 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:31,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:31,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:11:31,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:32,523 INFO L124 PetriNetUnfolderBase]: 2186/3296 cut-off events. [2024-06-27 20:11:32,523 INFO L125 PetriNetUnfolderBase]: For 126205/126238 co-relation queries the response was YES. [2024-06-27 20:11:32,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23298 conditions, 3296 events. 2186/3296 cut-off events. For 126205/126238 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 15737 event pairs, 585 based on Foata normal form. 9/3293 useless extension candidates. Maximal degree in co-relation 23240. Up to 3020 conditions per place. [2024-06-27 20:11:32,548 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 158 selfloop transitions, 22 changer transitions 0/207 dead transitions. [2024-06-27 20:11:32,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 207 transitions, 2058 flow [2024-06-27 20:11:32,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:11:32,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:11:32,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-27 20:11:32,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 20:11:32,550 INFO L175 Difference]: Start difference. First operand has 131 places, 166 transitions, 1594 flow. Second operand 10 states and 180 transitions. [2024-06-27 20:11:32,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 207 transitions, 2058 flow [2024-06-27 20:11:32,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 207 transitions, 1891 flow, removed 71 selfloop flow, removed 6 redundant places. [2024-06-27 20:11:32,623 INFO L231 Difference]: Finished difference. Result has 135 places, 166 transitions, 1478 flow [2024-06-27 20:11:32,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1427, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1478, PETRI_PLACES=135, PETRI_TRANSITIONS=166} [2024-06-27 20:11:32,624 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2024-06-27 20:11:32,624 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 166 transitions, 1478 flow [2024-06-27 20:11:32,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:32,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:32,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:32,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 20:11:32,625 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 20:11:32,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:32,625 INFO L85 PathProgramCache]: Analyzing trace with hash -8766756, now seen corresponding path program 1 times [2024-06-27 20:11:32,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:32,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247688746] [2024-06-27 20:11:32,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:32,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:32,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:33,489 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 20:11:33,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:33,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247688746] [2024-06-27 20:11:33,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247688746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:33,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:33,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:11:33,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695359065] [2024-06-27 20:11:33,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:33,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:11:33,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:33,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:11:33,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:11:33,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:11:33,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 166 transitions, 1478 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 20:11:33,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:33,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:11:33,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:34,359 INFO L124 PetriNetUnfolderBase]: 2390/3527 cut-off events. [2024-06-27 20:11:34,359 INFO L125 PetriNetUnfolderBase]: For 137322/137322 co-relation queries the response was YES. [2024-06-27 20:11:34,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24830 conditions, 3527 events. 2390/3527 cut-off events. For 137322/137322 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 16401 event pairs, 627 based on Foata normal form. 6/3532 useless extension candidates. Maximal degree in co-relation 24770. Up to 3311 conditions per place. [2024-06-27 20:11:34,383 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 185 selfloop transitions, 42 changer transitions 0/230 dead transitions. [2024-06-27 20:11:34,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 230 transitions, 2544 flow [2024-06-27 20:11:34,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:11:34,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:11:34,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 205 transitions. [2024-06-27 20:11:34,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 20:11:34,385 INFO L175 Difference]: Start difference. First operand has 135 places, 166 transitions, 1478 flow. Second operand 11 states and 205 transitions. [2024-06-27 20:11:34,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 230 transitions, 2544 flow [2024-06-27 20:11:34,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 230 transitions, 2495 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-27 20:11:34,460 INFO L231 Difference]: Finished difference. Result has 139 places, 177 transitions, 1738 flow [2024-06-27 20:11:34,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1429, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1738, PETRI_PLACES=139, PETRI_TRANSITIONS=177} [2024-06-27 20:11:34,461 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 97 predicate places. [2024-06-27 20:11:34,461 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 177 transitions, 1738 flow [2024-06-27 20:11:34,461 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 20:11:34,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:34,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:34,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 20:11:34,462 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:34,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:34,462 INFO L85 PathProgramCache]: Analyzing trace with hash 109325574, now seen corresponding path program 2 times [2024-06-27 20:11:34,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:34,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013174254] [2024-06-27 20:11:34,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:34,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:34,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:35,389 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 20:11:35,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:35,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013174254] [2024-06-27 20:11:35,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013174254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:35,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:35,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:11:35,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071494426] [2024-06-27 20:11:35,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:35,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:11:35,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:35,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:11:35,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:11:35,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:11:35,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 177 transitions, 1738 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 20:11:35,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:35,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:11:35,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:36,166 INFO L124 PetriNetUnfolderBase]: 2426/3581 cut-off events. [2024-06-27 20:11:36,166 INFO L125 PetriNetUnfolderBase]: For 151699/151702 co-relation queries the response was YES. [2024-06-27 20:11:36,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26270 conditions, 3581 events. 2426/3581 cut-off events. For 151699/151702 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 16736 event pairs, 565 based on Foata normal form. 8/3586 useless extension candidates. Maximal degree in co-relation 26207. Up to 2969 conditions per place. [2024-06-27 20:11:36,194 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 147 selfloop transitions, 81 changer transitions 0/231 dead transitions. [2024-06-27 20:11:36,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 231 transitions, 2854 flow [2024-06-27 20:11:36,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:11:36,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:11:36,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-27 20:11:36,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658536585365854 [2024-06-27 20:11:36,196 INFO L175 Difference]: Start difference. First operand has 139 places, 177 transitions, 1738 flow. Second operand 10 states and 191 transitions. [2024-06-27 20:11:36,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 231 transitions, 2854 flow [2024-06-27 20:11:36,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 231 transitions, 2703 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-27 20:11:36,309 INFO L231 Difference]: Finished difference. Result has 144 places, 184 transitions, 1933 flow [2024-06-27 20:11:36,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1587, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1933, PETRI_PLACES=144, PETRI_TRANSITIONS=184} [2024-06-27 20:11:36,310 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-27 20:11:36,310 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 184 transitions, 1933 flow [2024-06-27 20:11:36,310 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 20:11:36,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:36,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:36,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 20:11:36,311 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 20:11:36,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:36,311 INFO L85 PathProgramCache]: Analyzing trace with hash 668927630, now seen corresponding path program 3 times [2024-06-27 20:11:36,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:36,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972885915] [2024-06-27 20:11:36,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:36,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:36,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:37,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:37,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:37,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972885915] [2024-06-27 20:11:37,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972885915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:37,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:37,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:11:37,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444869431] [2024-06-27 20:11:37,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:37,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:11:37,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:37,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:11:37,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:11:37,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:11:37,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 184 transitions, 1933 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:37,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:37,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:11:37,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:37,997 INFO L124 PetriNetUnfolderBase]: 2320/3482 cut-off events. [2024-06-27 20:11:37,997 INFO L125 PetriNetUnfolderBase]: For 161065/161106 co-relation queries the response was YES. [2024-06-27 20:11:38,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26895 conditions, 3482 events. 2320/3482 cut-off events. For 161065/161106 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 16725 event pairs, 580 based on Foata normal form. 14/3483 useless extension candidates. Maximal degree in co-relation 26829. Up to 3162 conditions per place. [2024-06-27 20:11:38,026 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 154 selfloop transitions, 31 changer transitions 0/217 dead transitions. [2024-06-27 20:11:38,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 217 transitions, 2467 flow [2024-06-27 20:11:38,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:11:38,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:11:38,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 20:11:38,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 20:11:38,035 INFO L175 Difference]: Start difference. First operand has 144 places, 184 transitions, 1933 flow. Second operand 9 states and 162 transitions. [2024-06-27 20:11:38,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 217 transitions, 2467 flow [2024-06-27 20:11:38,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 217 transitions, 2323 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-27 20:11:38,146 INFO L231 Difference]: Finished difference. Result has 148 places, 186 transitions, 1948 flow [2024-06-27 20:11:38,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1789, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1948, PETRI_PLACES=148, PETRI_TRANSITIONS=186} [2024-06-27 20:11:38,147 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2024-06-27 20:11:38,147 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 186 transitions, 1948 flow [2024-06-27 20:11:38,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:38,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:38,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:38,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 20:11:38,148 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 20:11:38,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:38,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1294666376, now seen corresponding path program 3 times [2024-06-27 20:11:38,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:38,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522408311] [2024-06-27 20:11:38,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:38,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:38,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:38,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:38,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:38,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522408311] [2024-06-27 20:11:38,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522408311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:38,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:38,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:11:38,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613422454] [2024-06-27 20:11:38,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:38,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:11:38,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:38,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:11:38,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:11:39,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:11:39,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 186 transitions, 1948 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 20:11:39,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:39,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:11:39,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:39,763 INFO L124 PetriNetUnfolderBase]: 2535/3739 cut-off events. [2024-06-27 20:11:39,763 INFO L125 PetriNetUnfolderBase]: For 180868/180871 co-relation queries the response was YES. [2024-06-27 20:11:39,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29310 conditions, 3739 events. 2535/3739 cut-off events. For 180868/180871 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 17662 event pairs, 571 based on Foata normal form. 8/3744 useless extension candidates. Maximal degree in co-relation 29242. Up to 3085 conditions per place. [2024-06-27 20:11:39,795 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 158 selfloop transitions, 80 changer transitions 0/241 dead transitions. [2024-06-27 20:11:39,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 241 transitions, 3160 flow [2024-06-27 20:11:39,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:11:39,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:11:39,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-27 20:11:39,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47073170731707314 [2024-06-27 20:11:39,797 INFO L175 Difference]: Start difference. First operand has 148 places, 186 transitions, 1948 flow. Second operand 10 states and 193 transitions. [2024-06-27 20:11:39,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 241 transitions, 3160 flow [2024-06-27 20:11:39,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 241 transitions, 3019 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-27 20:11:40,000 INFO L231 Difference]: Finished difference. Result has 152 places, 194 transitions, 2181 flow [2024-06-27 20:11:40,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1807, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2181, PETRI_PLACES=152, PETRI_TRANSITIONS=194} [2024-06-27 20:11:40,000 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-27 20:11:40,000 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 194 transitions, 2181 flow [2024-06-27 20:11:40,001 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 20:11:40,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:40,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:40,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 20:11:40,001 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 20:11:40,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:40,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1294488746, now seen corresponding path program 4 times [2024-06-27 20:11:40,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:40,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153035218] [2024-06-27 20:11:40,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:40,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:40,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:40,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:40,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:40,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153035218] [2024-06-27 20:11:40,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153035218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:40,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:40,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:11:40,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977155782] [2024-06-27 20:11:40,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:40,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:11:40,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:40,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:11:40,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:11:40,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:11:40,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 194 transitions, 2181 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 20:11:40,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:40,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:11:40,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:41,664 INFO L124 PetriNetUnfolderBase]: 2539/3745 cut-off events. [2024-06-27 20:11:41,664 INFO L125 PetriNetUnfolderBase]: For 190023/190026 co-relation queries the response was YES. [2024-06-27 20:11:41,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30310 conditions, 3745 events. 2539/3745 cut-off events. For 190023/190026 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 17658 event pairs, 563 based on Foata normal form. 8/3750 useless extension candidates. Maximal degree in co-relation 30240. Up to 3195 conditions per place. [2024-06-27 20:11:41,702 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 158 selfloop transitions, 75 changer transitions 0/236 dead transitions. [2024-06-27 20:11:41,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 236 transitions, 3058 flow [2024-06-27 20:11:41,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:11:41,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:11:41,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 20:11:41,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-27 20:11:41,704 INFO L175 Difference]: Start difference. First operand has 152 places, 194 transitions, 2181 flow. Second operand 9 states and 172 transitions. [2024-06-27 20:11:41,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 236 transitions, 3058 flow [2024-06-27 20:11:41,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 236 transitions, 2834 flow, removed 71 selfloop flow, removed 6 redundant places. [2024-06-27 20:11:41,861 INFO L231 Difference]: Finished difference. Result has 155 places, 198 transitions, 2235 flow [2024-06-27 20:11:41,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1979, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2235, PETRI_PLACES=155, PETRI_TRANSITIONS=198} [2024-06-27 20:11:41,861 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 113 predicate places. [2024-06-27 20:11:41,861 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 198 transitions, 2235 flow [2024-06-27 20:11:41,862 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 20:11:41,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:41,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:41,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 20:11:41,862 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 20:11:41,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:41,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1294481802, now seen corresponding path program 1 times [2024-06-27 20:11:41,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:41,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033045001] [2024-06-27 20:11:41,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:41,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:41,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:42,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:42,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:42,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033045001] [2024-06-27 20:11:42,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033045001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:42,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:42,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:11:42,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362324396] [2024-06-27 20:11:42,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:42,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:11:42,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:42,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:11:42,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:11:42,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:11:42,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 198 transitions, 2235 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 20:11:42,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:42,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:11:42,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:43,372 INFO L124 PetriNetUnfolderBase]: 2567/3789 cut-off events. [2024-06-27 20:11:43,372 INFO L125 PetriNetUnfolderBase]: For 200547/200550 co-relation queries the response was YES. [2024-06-27 20:11:43,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30970 conditions, 3789 events. 2567/3789 cut-off events. For 200547/200550 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 17922 event pairs, 577 based on Foata normal form. 8/3794 useless extension candidates. Maximal degree in co-relation 30898. Up to 3554 conditions per place. [2024-06-27 20:11:43,405 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 191 selfloop transitions, 40 changer transitions 0/234 dead transitions. [2024-06-27 20:11:43,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 234 transitions, 3073 flow [2024-06-27 20:11:43,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:11:43,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:11:43,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:11:43,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-27 20:11:43,407 INFO L175 Difference]: Start difference. First operand has 155 places, 198 transitions, 2235 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:11:43,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 234 transitions, 3073 flow [2024-06-27 20:11:43,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 234 transitions, 2856 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-27 20:11:43,545 INFO L231 Difference]: Finished difference. Result has 156 places, 201 transitions, 2198 flow [2024-06-27 20:11:43,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2018, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2198, PETRI_PLACES=156, PETRI_TRANSITIONS=201} [2024-06-27 20:11:43,546 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 114 predicate places. [2024-06-27 20:11:43,546 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 201 transitions, 2198 flow [2024-06-27 20:11:43,546 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 20:11:43,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:43,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:43,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 20:11:43,547 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 20:11:43,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:43,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1398204194, now seen corresponding path program 1 times [2024-06-27 20:11:43,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:43,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105035828] [2024-06-27 20:11:43,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:43,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:43,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:43,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:43,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:43,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105035828] [2024-06-27 20:11:43,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105035828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:43,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:43,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:11:43,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036892357] [2024-06-27 20:11:43,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:43,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:11:43,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:43,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:11:43,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:11:44,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:11:44,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 201 transitions, 2198 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 20:11:44,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:44,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:11:44,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:44,598 INFO L124 PetriNetUnfolderBase]: 2416/3615 cut-off events. [2024-06-27 20:11:44,599 INFO L125 PetriNetUnfolderBase]: For 204227/204254 co-relation queries the response was YES. [2024-06-27 20:11:44,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30102 conditions, 3615 events. 2416/3615 cut-off events. For 204227/204254 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 17552 event pairs, 618 based on Foata normal form. 4/3579 useless extension candidates. Maximal degree in co-relation 30029. Up to 3460 conditions per place. [2024-06-27 20:11:44,630 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 185 selfloop transitions, 22 changer transitions 0/222 dead transitions. [2024-06-27 20:11:44,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 222 transitions, 2801 flow [2024-06-27 20:11:44,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:11:44,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:11:44,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-27 20:11:44,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44308943089430897 [2024-06-27 20:11:44,632 INFO L175 Difference]: Start difference. First operand has 156 places, 201 transitions, 2198 flow. Second operand 6 states and 109 transitions. [2024-06-27 20:11:44,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 222 transitions, 2801 flow [2024-06-27 20:11:44,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 222 transitions, 2635 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-27 20:11:44,773 INFO L231 Difference]: Finished difference. Result has 156 places, 206 transitions, 2164 flow [2024-06-27 20:11:44,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2036, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2164, PETRI_PLACES=156, PETRI_TRANSITIONS=206} [2024-06-27 20:11:44,773 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 114 predicate places. [2024-06-27 20:11:44,774 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 206 transitions, 2164 flow [2024-06-27 20:11:44,774 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 20:11:44,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:44,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:44,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 20:11:44,774 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:44,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:44,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1465980196, now seen corresponding path program 5 times [2024-06-27 20:11:44,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:44,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337489886] [2024-06-27 20:11:44,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:44,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:44,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:45,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:45,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:45,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337489886] [2024-06-27 20:11:45,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337489886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:45,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:45,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:11:45,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234820523] [2024-06-27 20:11:45,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:45,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:11:45,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:45,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:11:45,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:11:45,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:11:45,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 206 transitions, 2164 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 20:11:45,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:45,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:11:45,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:46,381 INFO L124 PetriNetUnfolderBase]: 2637/3887 cut-off events. [2024-06-27 20:11:46,381 INFO L125 PetriNetUnfolderBase]: For 219371/219371 co-relation queries the response was YES. [2024-06-27 20:11:46,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31925 conditions, 3887 events. 2637/3887 cut-off events. For 219371/219371 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 18408 event pairs, 621 based on Foata normal form. 6/3892 useless extension candidates. Maximal degree in co-relation 31851. Up to 3487 conditions per place. [2024-06-27 20:11:46,413 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 203 selfloop transitions, 50 changer transitions 0/256 dead transitions. [2024-06-27 20:11:46,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 256 transitions, 3396 flow [2024-06-27 20:11:46,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:11:46,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:11:46,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-27 20:11:46,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44634146341463415 [2024-06-27 20:11:46,415 INFO L175 Difference]: Start difference. First operand has 156 places, 206 transitions, 2164 flow. Second operand 10 states and 183 transitions. [2024-06-27 20:11:46,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 256 transitions, 3396 flow [2024-06-27 20:11:46,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 256 transitions, 3347 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 20:11:46,561 INFO L231 Difference]: Finished difference. Result has 164 places, 214 transitions, 2449 flow [2024-06-27 20:11:46,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2115, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2449, PETRI_PLACES=164, PETRI_TRANSITIONS=214} [2024-06-27 20:11:46,561 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2024-06-27 20:11:46,561 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 214 transitions, 2449 flow [2024-06-27 20:11:46,562 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 20:11:46,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:46,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:46,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 20:11:46,562 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 20:11:46,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:46,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1742651472, now seen corresponding path program 4 times [2024-06-27 20:11:46,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:46,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081198715] [2024-06-27 20:11:46,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:46,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:46,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:47,389 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 20:11:47,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:47,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081198715] [2024-06-27 20:11:47,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081198715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:47,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:47,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:11:47,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751659937] [2024-06-27 20:11:47,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:47,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:11:47,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:47,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:11:47,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:11:47,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:11:47,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 214 transitions, 2449 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:47,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:47,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:11:47,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:48,213 INFO L124 PetriNetUnfolderBase]: 2497/3742 cut-off events. [2024-06-27 20:11:48,213 INFO L125 PetriNetUnfolderBase]: For 226599/226637 co-relation queries the response was YES. [2024-06-27 20:11:48,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31686 conditions, 3742 events. 2497/3742 cut-off events. For 226599/226637 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 18176 event pairs, 599 based on Foata normal form. 6/3736 useless extension candidates. Maximal degree in co-relation 31610. Up to 3449 conditions per place. [2024-06-27 20:11:48,246 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 185 selfloop transitions, 19 changer transitions 0/244 dead transitions. [2024-06-27 20:11:48,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 244 transitions, 3029 flow [2024-06-27 20:11:48,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:11:48,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:11:48,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 20:11:48,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-27 20:11:48,249 INFO L175 Difference]: Start difference. First operand has 164 places, 214 transitions, 2449 flow. Second operand 9 states and 155 transitions. [2024-06-27 20:11:48,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 244 transitions, 3029 flow [2024-06-27 20:11:48,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 244 transitions, 2826 flow, removed 75 selfloop flow, removed 6 redundant places. [2024-06-27 20:11:48,406 INFO L231 Difference]: Finished difference. Result has 167 places, 216 transitions, 2397 flow [2024-06-27 20:11:48,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2246, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2397, PETRI_PLACES=167, PETRI_TRANSITIONS=216} [2024-06-27 20:11:48,406 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 125 predicate places. [2024-06-27 20:11:48,406 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 216 transitions, 2397 flow [2024-06-27 20:11:48,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:48,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:48,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:48,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 20:11:48,407 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 20:11:48,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:48,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1465795622, now seen corresponding path program 2 times [2024-06-27 20:11:48,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:48,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906308977] [2024-06-27 20:11:48,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:48,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:48,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:49,218 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 20:11:49,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:49,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906308977] [2024-06-27 20:11:49,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906308977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:49,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:49,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:11:49,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950449872] [2024-06-27 20:11:49,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:49,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:11:49,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:49,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:11:49,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:11:49,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:11:49,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 216 transitions, 2397 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 20:11:49,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:49,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:11:49,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:49,994 INFO L124 PetriNetUnfolderBase]: 2657/3919 cut-off events. [2024-06-27 20:11:49,994 INFO L125 PetriNetUnfolderBase]: For 244581/244581 co-relation queries the response was YES. [2024-06-27 20:11:50,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32987 conditions, 3919 events. 2657/3919 cut-off events. For 244581/244581 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 18659 event pairs, 629 based on Foata normal form. 6/3924 useless extension candidates. Maximal degree in co-relation 32909. Up to 3760 conditions per place. [2024-06-27 20:11:50,031 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 214 selfloop transitions, 30 changer transitions 0/247 dead transitions. [2024-06-27 20:11:50,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 247 transitions, 3207 flow [2024-06-27 20:11:50,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:11:50,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:11:50,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 20:11:50,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-27 20:11:50,032 INFO L175 Difference]: Start difference. First operand has 167 places, 216 transitions, 2397 flow. Second operand 8 states and 143 transitions. [2024-06-27 20:11:50,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 247 transitions, 3207 flow [2024-06-27 20:11:50,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 247 transitions, 3074 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-27 20:11:50,211 INFO L231 Difference]: Finished difference. Result has 168 places, 219 transitions, 2436 flow [2024-06-27 20:11:50,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2264, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2436, PETRI_PLACES=168, PETRI_TRANSITIONS=219} [2024-06-27 20:11:50,213 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 126 predicate places. [2024-06-27 20:11:50,213 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 219 transitions, 2436 flow [2024-06-27 20:11:50,213 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 20:11:50,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:50,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:50,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 20:11:50,213 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 20:11:50,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:50,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1465802566, now seen corresponding path program 6 times [2024-06-27 20:11:50,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:50,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080359412] [2024-06-27 20:11:50,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:50,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:50,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:51,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:51,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:51,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080359412] [2024-06-27 20:11:51,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080359412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:51,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:51,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:11:51,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971410353] [2024-06-27 20:11:51,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:51,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:11:51,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:51,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:11:51,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:11:51,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:11:51,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 219 transitions, 2436 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 20:11:51,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:51,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:11:51,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:51,850 INFO L124 PetriNetUnfolderBase]: 2693/3971 cut-off events. [2024-06-27 20:11:51,850 INFO L125 PetriNetUnfolderBase]: For 253894/253894 co-relation queries the response was YES. [2024-06-27 20:11:51,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33730 conditions, 3971 events. 2693/3971 cut-off events. For 253894/253894 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 18956 event pairs, 627 based on Foata normal form. 6/3976 useless extension candidates. Maximal degree in co-relation 33651. Up to 3669 conditions per place. [2024-06-27 20:11:51,886 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 208 selfloop transitions, 45 changer transitions 0/256 dead transitions. [2024-06-27 20:11:51,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 256 transitions, 3287 flow [2024-06-27 20:11:51,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:11:51,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:11:51,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 20:11:51,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-27 20:11:51,888 INFO L175 Difference]: Start difference. First operand has 168 places, 219 transitions, 2436 flow. Second operand 9 states and 163 transitions. [2024-06-27 20:11:51,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 256 transitions, 3287 flow [2024-06-27 20:11:52,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 256 transitions, 3139 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-27 20:11:52,085 INFO L231 Difference]: Finished difference. Result has 171 places, 223 transitions, 2496 flow [2024-06-27 20:11:52,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2288, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2496, PETRI_PLACES=171, PETRI_TRANSITIONS=223} [2024-06-27 20:11:52,085 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 129 predicate places. [2024-06-27 20:11:52,086 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 223 transitions, 2496 flow [2024-06-27 20:11:52,086 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 20:11:52,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:52,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:52,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 20:11:52,086 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:52,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:52,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1506291414, now seen corresponding path program 3 times [2024-06-27 20:11:52,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:52,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463041483] [2024-06-27 20:11:52,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:52,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:52,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:53,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:53,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:53,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463041483] [2024-06-27 20:11:53,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463041483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:53,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:53,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:11:53,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960812775] [2024-06-27 20:11:53,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:53,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:11:53,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:53,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:11:53,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:11:53,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:11:53,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 223 transitions, 2496 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 20:11:53,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:53,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:11:53,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:53,882 INFO L124 PetriNetUnfolderBase]: 2721/4015 cut-off events. [2024-06-27 20:11:53,883 INFO L125 PetriNetUnfolderBase]: For 264698/264698 co-relation queries the response was YES. [2024-06-27 20:11:53,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34367 conditions, 4015 events. 2721/4015 cut-off events. For 264698/264698 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 19171 event pairs, 652 based on Foata normal form. 6/4020 useless extension candidates. Maximal degree in co-relation 34287. Up to 3875 conditions per place. [2024-06-27 20:11:53,925 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 216 selfloop transitions, 33 changer transitions 0/252 dead transitions. [2024-06-27 20:11:53,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 252 transitions, 3246 flow [2024-06-27 20:11:53,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:11:53,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:11:53,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 20:11:53,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-27 20:11:53,927 INFO L175 Difference]: Start difference. First operand has 171 places, 223 transitions, 2496 flow. Second operand 8 states and 142 transitions. [2024-06-27 20:11:53,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 252 transitions, 3246 flow [2024-06-27 20:11:54,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 252 transitions, 3077 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-27 20:11:54,133 INFO L231 Difference]: Finished difference. Result has 172 places, 226 transitions, 2514 flow [2024-06-27 20:11:54,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2327, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2514, PETRI_PLACES=172, PETRI_TRANSITIONS=226} [2024-06-27 20:11:54,138 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-27 20:11:54,138 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 226 transitions, 2514 flow [2024-06-27 20:11:54,138 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 20:11:54,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:54,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:54,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 20:11:54,139 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:54,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:54,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1270065710, now seen corresponding path program 7 times [2024-06-27 20:11:54,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:54,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746464232] [2024-06-27 20:11:54,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:54,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:54,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:54,919 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 20:11:54,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:54,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746464232] [2024-06-27 20:11:54,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746464232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:54,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:54,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:11:54,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889849370] [2024-06-27 20:11:54,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:54,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:11:54,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:54,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:11:54,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:11:55,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:11:55,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 226 transitions, 2514 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 20:11:55,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:55,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:11:55,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:55,829 INFO L124 PetriNetUnfolderBase]: 2738/4040 cut-off events. [2024-06-27 20:11:55,829 INFO L125 PetriNetUnfolderBase]: For 276774/276774 co-relation queries the response was YES. [2024-06-27 20:11:55,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34526 conditions, 4040 events. 2738/4040 cut-off events. For 276774/276774 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 19347 event pairs, 632 based on Foata normal form. 9/4048 useless extension candidates. Maximal degree in co-relation 34445. Up to 3835 conditions per place. [2024-06-27 20:11:55,869 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 222 selfloop transitions, 45 changer transitions 0/270 dead transitions. [2024-06-27 20:11:55,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 270 transitions, 3660 flow [2024-06-27 20:11:55,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:11:55,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:11:55,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 20:11:55,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 20:11:55,870 INFO L175 Difference]: Start difference. First operand has 172 places, 226 transitions, 2514 flow. Second operand 9 states and 162 transitions. [2024-06-27 20:11:55,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 270 transitions, 3660 flow [2024-06-27 20:11:56,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 270 transitions, 3499 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-27 20:11:56,113 INFO L231 Difference]: Finished difference. Result has 176 places, 237 transitions, 2772 flow [2024-06-27 20:11:56,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2353, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2772, PETRI_PLACES=176, PETRI_TRANSITIONS=237} [2024-06-27 20:11:56,114 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 134 predicate places. [2024-06-27 20:11:56,114 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 237 transitions, 2772 flow [2024-06-27 20:11:56,114 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 20:11:56,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:56,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:56,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 20:11:56,115 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:56,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:56,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1237664080, now seen corresponding path program 1 times [2024-06-27 20:11:56,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:56,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388490010] [2024-06-27 20:11:56,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:56,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:56,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:57,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:57,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:57,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388490010] [2024-06-27 20:11:57,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388490010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:57,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:57,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:11:57,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935402599] [2024-06-27 20:11:57,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:57,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:11:57,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:57,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:11:57,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:11:57,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:11:57,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 237 transitions, 2772 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 20:11:57,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:57,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:11:57,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:57,988 INFO L124 PetriNetUnfolderBase]: 2729/4027 cut-off events. [2024-06-27 20:11:57,988 INFO L125 PetriNetUnfolderBase]: For 278555/278555 co-relation queries the response was YES. [2024-06-27 20:11:58,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34809 conditions, 4027 events. 2729/4027 cut-off events. For 278555/278555 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 19271 event pairs, 634 based on Foata normal form. 3/4029 useless extension candidates. Maximal degree in co-relation 34726. Up to 3874 conditions per place. [2024-06-27 20:11:58,023 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 222 selfloop transitions, 38 changer transitions 0/263 dead transitions. [2024-06-27 20:11:58,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 263 transitions, 3444 flow [2024-06-27 20:11:58,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:11:58,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:11:58,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 20:11:58,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-27 20:11:58,024 INFO L175 Difference]: Start difference. First operand has 176 places, 237 transitions, 2772 flow. Second operand 8 states and 143 transitions. [2024-06-27 20:11:58,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 263 transitions, 3444 flow [2024-06-27 20:11:58,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 263 transitions, 3173 flow, removed 116 selfloop flow, removed 5 redundant places. [2024-06-27 20:11:58,280 INFO L231 Difference]: Finished difference. Result has 179 places, 237 transitions, 2591 flow [2024-06-27 20:11:58,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2501, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2591, PETRI_PLACES=179, PETRI_TRANSITIONS=237} [2024-06-27 20:11:58,281 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 137 predicate places. [2024-06-27 20:11:58,281 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 237 transitions, 2591 flow [2024-06-27 20:11:58,282 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 20:11:58,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:58,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:58,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 20:11:58,282 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:58,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:58,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1229323592, now seen corresponding path program 4 times [2024-06-27 20:11:58,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:58,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17050152] [2024-06-27 20:11:58,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:58,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:58,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:59,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:59,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:59,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17050152] [2024-06-27 20:11:59,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17050152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:59,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:59,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:11:59,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914920346] [2024-06-27 20:11:59,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:59,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:11:59,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:59,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:11:59,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:11:59,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:11:59,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 237 transitions, 2591 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 20:11:59,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:59,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:11:59,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:59,998 INFO L124 PetriNetUnfolderBase]: 2732/4032 cut-off events. [2024-06-27 20:11:59,999 INFO L125 PetriNetUnfolderBase]: For 286100/286100 co-relation queries the response was YES. [2024-06-27 20:12:00,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34529 conditions, 4032 events. 2732/4032 cut-off events. For 286100/286100 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 19271 event pairs, 629 based on Foata normal form. 6/4037 useless extension candidates. Maximal degree in co-relation 34444. Up to 3905 conditions per place. [2024-06-27 20:12:00,045 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 235 selfloop transitions, 28 changer transitions 0/266 dead transitions. [2024-06-27 20:12:00,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 266 transitions, 3383 flow [2024-06-27 20:12:00,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:12:00,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:12:00,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 20:12:00,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-27 20:12:00,046 INFO L175 Difference]: Start difference. First operand has 179 places, 237 transitions, 2591 flow. Second operand 8 states and 141 transitions. [2024-06-27 20:12:00,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 266 transitions, 3383 flow [2024-06-27 20:12:00,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 266 transitions, 3301 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 20:12:00,281 INFO L231 Difference]: Finished difference. Result has 180 places, 240 transitions, 2695 flow [2024-06-27 20:12:00,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2509, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2695, PETRI_PLACES=180, PETRI_TRANSITIONS=240} [2024-06-27 20:12:00,282 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 138 predicate places. [2024-06-27 20:12:00,282 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 240 transitions, 2695 flow [2024-06-27 20:12:00,282 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 20:12:00,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:00,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:00,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 20:12:00,283 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 20:12:00,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:00,283 INFO L85 PathProgramCache]: Analyzing trace with hash -899549354, now seen corresponding path program 2 times [2024-06-27 20:12:00,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:00,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793946451] [2024-06-27 20:12:00,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:00,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:00,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:00,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:00,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:00,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793946451] [2024-06-27 20:12:00,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793946451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:00,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:00,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:12:00,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823523317] [2024-06-27 20:12:00,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:00,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:12:00,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:00,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:12:00,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:12:00,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:12:00,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 240 transitions, 2695 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 20:12:00,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:00,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:12:00,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:01,353 INFO L124 PetriNetUnfolderBase]: 2554/3828 cut-off events. [2024-06-27 20:12:01,353 INFO L125 PetriNetUnfolderBase]: For 290447/290468 co-relation queries the response was YES. [2024-06-27 20:12:01,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33555 conditions, 3828 events. 2554/3828 cut-off events. For 290447/290468 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 18854 event pairs, 632 based on Foata normal form. 6/3807 useless extension candidates. Maximal degree in co-relation 33469. Up to 3672 conditions per place. [2024-06-27 20:12:01,452 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 218 selfloop transitions, 13 changer transitions 0/249 dead transitions. [2024-06-27 20:12:01,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 249 transitions, 3179 flow [2024-06-27 20:12:01,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:12:01,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:12:01,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-27 20:12:01,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-27 20:12:01,455 INFO L175 Difference]: Start difference. First operand has 180 places, 240 transitions, 2695 flow. Second operand 6 states and 100 transitions. [2024-06-27 20:12:01,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 249 transitions, 3179 flow [2024-06-27 20:12:01,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 249 transitions, 3001 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-06-27 20:12:01,688 INFO L231 Difference]: Finished difference. Result has 180 places, 240 transitions, 2551 flow [2024-06-27 20:12:01,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2517, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2551, PETRI_PLACES=180, PETRI_TRANSITIONS=240} [2024-06-27 20:12:01,689 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 138 predicate places. [2024-06-27 20:12:01,689 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 240 transitions, 2551 flow [2024-06-27 20:12:01,689 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 20:12:01,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:01,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:01,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 20:12:01,690 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 20:12:01,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:01,690 INFO L85 PathProgramCache]: Analyzing trace with hash 204099370, now seen corresponding path program 1 times [2024-06-27 20:12:01,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:01,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871268915] [2024-06-27 20:12:01,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:01,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:01,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:02,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:02,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:02,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871268915] [2024-06-27 20:12:02,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871268915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:02,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:02,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:12:02,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182770704] [2024-06-27 20:12:02,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:02,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:12:02,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:02,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:12:02,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:12:02,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:12:02,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 240 transitions, 2551 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 20:12:02,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:02,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:12:02,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:02,870 INFO L124 PetriNetUnfolderBase]: 2725/4023 cut-off events. [2024-06-27 20:12:02,871 INFO L125 PetriNetUnfolderBase]: For 294704/294704 co-relation queries the response was YES. [2024-06-27 20:12:02,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34532 conditions, 4023 events. 2725/4023 cut-off events. For 294704/294704 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 19148 event pairs, 654 based on Foata normal form. 3/4025 useless extension candidates. Maximal degree in co-relation 34445. Up to 3956 conditions per place. [2024-06-27 20:12:02,913 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 229 selfloop transitions, 24 changer transitions 0/256 dead transitions. [2024-06-27 20:12:02,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 256 transitions, 3221 flow [2024-06-27 20:12:02,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:12:02,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:12:02,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-27 20:12:02,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-27 20:12:02,915 INFO L175 Difference]: Start difference. First operand has 180 places, 240 transitions, 2551 flow. Second operand 6 states and 105 transitions. [2024-06-27 20:12:02,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 256 transitions, 3221 flow [2024-06-27 20:12:03,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 256 transitions, 3177 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 20:12:03,164 INFO L231 Difference]: Finished difference. Result has 181 places, 243 transitions, 2610 flow [2024-06-27 20:12:03,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2507, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2610, PETRI_PLACES=181, PETRI_TRANSITIONS=243} [2024-06-27 20:12:03,165 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 139 predicate places. [2024-06-27 20:12:03,165 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 243 transitions, 2610 flow [2024-06-27 20:12:03,165 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 20:12:03,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:03,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:03,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 20:12:03,166 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 20:12:03,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:03,166 INFO L85 PathProgramCache]: Analyzing trace with hash -899370422, now seen corresponding path program 2 times [2024-06-27 20:12:03,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:03,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218503036] [2024-06-27 20:12:03,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:03,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:03,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:03,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:03,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:03,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218503036] [2024-06-27 20:12:03,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218503036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:03,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:03,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:12:03,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711346077] [2024-06-27 20:12:03,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:03,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:12:03,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:03,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:12:03,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:12:03,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:12:03,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 243 transitions, 2610 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 20:12:03,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:03,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:12:03,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:04,400 INFO L124 PetriNetUnfolderBase]: 2691/3973 cut-off events. [2024-06-27 20:12:04,400 INFO L125 PetriNetUnfolderBase]: For 302038/302041 co-relation queries the response was YES. [2024-06-27 20:12:04,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34424 conditions, 3973 events. 2691/3973 cut-off events. For 302038/302041 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 18900 event pairs, 664 based on Foata normal form. 1/3971 useless extension candidates. Maximal degree in co-relation 34336. Up to 3907 conditions per place. [2024-06-27 20:12:04,439 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 224 selfloop transitions, 25 changer transitions 0/252 dead transitions. [2024-06-27 20:12:04,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 252 transitions, 3130 flow [2024-06-27 20:12:04,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:12:04,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:12:04,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-27 20:12:04,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 20:12:04,440 INFO L175 Difference]: Start difference. First operand has 181 places, 243 transitions, 2610 flow. Second operand 6 states and 102 transitions. [2024-06-27 20:12:04,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 252 transitions, 3130 flow [2024-06-27 20:12:04,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 252 transitions, 3082 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 20:12:04,653 INFO L231 Difference]: Finished difference. Result has 183 places, 243 transitions, 2618 flow [2024-06-27 20:12:04,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2562, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2618, PETRI_PLACES=183, PETRI_TRANSITIONS=243} [2024-06-27 20:12:04,654 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-27 20:12:04,654 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 243 transitions, 2618 flow [2024-06-27 20:12:04,654 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 20:12:04,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:04,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:04,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 20:12:04,655 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:04,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:04,655 INFO L85 PathProgramCache]: Analyzing trace with hash -273645536, now seen corresponding path program 1 times [2024-06-27 20:12:04,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:04,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353814277] [2024-06-27 20:12:04,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:04,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:04,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:05,428 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 20:12:05,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:05,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353814277] [2024-06-27 20:12:05,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353814277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:05,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:05,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:12:05,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134386753] [2024-06-27 20:12:05,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:05,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:12:05,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:05,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:12:05,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:12:05,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:12:05,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 243 transitions, 2618 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:05,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:05,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:12:05,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:06,491 INFO L124 PetriNetUnfolderBase]: 3067/4567 cut-off events. [2024-06-27 20:12:06,491 INFO L125 PetriNetUnfolderBase]: For 400246/400246 co-relation queries the response was YES. [2024-06-27 20:12:06,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42269 conditions, 4567 events. 3067/4567 cut-off events. For 400246/400246 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 22867 event pairs, 614 based on Foata normal form. 24/4590 useless extension candidates. Maximal degree in co-relation 42180. Up to 3682 conditions per place. [2024-06-27 20:12:06,542 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 266 selfloop transitions, 47 changer transitions 0/316 dead transitions. [2024-06-27 20:12:06,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 316 transitions, 4290 flow [2024-06-27 20:12:06,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:12:06,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:12:06,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-27 20:12:06,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47671840354767187 [2024-06-27 20:12:06,544 INFO L175 Difference]: Start difference. First operand has 183 places, 243 transitions, 2618 flow. Second operand 11 states and 215 transitions. [2024-06-27 20:12:06,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 316 transitions, 4290 flow [2024-06-27 20:12:06,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 316 transitions, 4224 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 20:12:06,837 INFO L231 Difference]: Finished difference. Result has 191 places, 249 transitions, 2906 flow [2024-06-27 20:12:06,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2552, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2906, PETRI_PLACES=191, PETRI_TRANSITIONS=249} [2024-06-27 20:12:06,837 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 149 predicate places. [2024-06-27 20:12:06,838 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 249 transitions, 2906 flow [2024-06-27 20:12:06,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:06,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:06,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:06,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 20:12:06,838 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:06,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:06,839 INFO L85 PathProgramCache]: Analyzing trace with hash -271767866, now seen corresponding path program 2 times [2024-06-27 20:12:06,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:06,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368141784] [2024-06-27 20:12:06,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:06,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:06,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:07,607 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 20:12:07,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:07,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368141784] [2024-06-27 20:12:07,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368141784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:07,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:07,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:12:07,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56060677] [2024-06-27 20:12:07,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:07,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:12:07,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:07,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:12:07,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:12:07,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:12:07,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 249 transitions, 2906 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:07,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:07,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:12:07,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:08,780 INFO L124 PetriNetUnfolderBase]: 3262/4872 cut-off events. [2024-06-27 20:12:08,780 INFO L125 PetriNetUnfolderBase]: For 450528/450528 co-relation queries the response was YES. [2024-06-27 20:12:08,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45915 conditions, 4872 events. 3262/4872 cut-off events. For 450528/450528 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 24760 event pairs, 827 based on Foata normal form. 30/4901 useless extension candidates. Maximal degree in co-relation 45823. Up to 4430 conditions per place. [2024-06-27 20:12:08,831 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 262 selfloop transitions, 53 changer transitions 0/318 dead transitions. [2024-06-27 20:12:08,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 318 transitions, 4227 flow [2024-06-27 20:12:08,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:12:08,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:12:08,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-27 20:12:08,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4611973392461197 [2024-06-27 20:12:08,832 INFO L175 Difference]: Start difference. First operand has 191 places, 249 transitions, 2906 flow. Second operand 11 states and 208 transitions. [2024-06-27 20:12:08,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 318 transitions, 4227 flow [2024-06-27 20:12:09,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 318 transitions, 4055 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-27 20:12:09,238 INFO L231 Difference]: Finished difference. Result has 198 places, 261 transitions, 3089 flow [2024-06-27 20:12:09,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2741, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3089, PETRI_PLACES=198, PETRI_TRANSITIONS=261} [2024-06-27 20:12:09,238 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 156 predicate places. [2024-06-27 20:12:09,238 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 261 transitions, 3089 flow [2024-06-27 20:12:09,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:09,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:09,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:09,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 20:12:09,239 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:09,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:09,239 INFO L85 PathProgramCache]: Analyzing trace with hash -271771586, now seen corresponding path program 3 times [2024-06-27 20:12:09,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:09,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760007638] [2024-06-27 20:12:09,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:09,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:09,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:10,105 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 20:12:10,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:10,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760007638] [2024-06-27 20:12:10,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760007638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:10,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:10,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:12:10,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224628350] [2024-06-27 20:12:10,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:10,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:12:10,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:10,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:12:10,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:12:10,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:12:10,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 261 transitions, 3089 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:10,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:10,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:12:10,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:11,371 INFO L124 PetriNetUnfolderBase]: 3358/5032 cut-off events. [2024-06-27 20:12:11,371 INFO L125 PetriNetUnfolderBase]: For 469311/469311 co-relation queries the response was YES. [2024-06-27 20:12:11,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47459 conditions, 5032 events. 3358/5032 cut-off events. For 469311/469311 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 25944 event pairs, 804 based on Foata normal form. 24/5055 useless extension candidates. Maximal degree in co-relation 47363. Up to 4033 conditions per place. [2024-06-27 20:12:11,429 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 270 selfloop transitions, 54 changer transitions 0/327 dead transitions. [2024-06-27 20:12:11,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 327 transitions, 4705 flow [2024-06-27 20:12:11,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:12:11,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:12:11,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-27 20:12:11,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656319290465632 [2024-06-27 20:12:11,433 INFO L175 Difference]: Start difference. First operand has 198 places, 261 transitions, 3089 flow. Second operand 11 states and 210 transitions. [2024-06-27 20:12:11,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 327 transitions, 4705 flow [2024-06-27 20:12:11,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 327 transitions, 4562 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-27 20:12:11,925 INFO L231 Difference]: Finished difference. Result has 204 places, 265 transitions, 3277 flow [2024-06-27 20:12:11,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2946, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3277, PETRI_PLACES=204, PETRI_TRANSITIONS=265} [2024-06-27 20:12:11,926 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-06-27 20:12:11,926 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 265 transitions, 3277 flow [2024-06-27 20:12:11,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:11,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:11,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:11,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 20:12:11,932 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:11,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:11,932 INFO L85 PathProgramCache]: Analyzing trace with hash -758859294, now seen corresponding path program 1 times [2024-06-27 20:12:11,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:11,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864589322] [2024-06-27 20:12:11,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:11,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:11,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:12,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:12,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:12,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864589322] [2024-06-27 20:12:12,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864589322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:12,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:12,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:12:12,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167048600] [2024-06-27 20:12:12,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:12,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:12:12,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:12,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:12:12,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:12:12,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:12:12,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 265 transitions, 3277 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:12,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:12,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:12:12,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:13,915 INFO L124 PetriNetUnfolderBase]: 3361/5037 cut-off events. [2024-06-27 20:12:13,915 INFO L125 PetriNetUnfolderBase]: For 454306/454306 co-relation queries the response was YES. [2024-06-27 20:12:13,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47291 conditions, 5037 events. 3361/5037 cut-off events. For 454306/454306 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 26044 event pairs, 863 based on Foata normal form. 6/5042 useless extension candidates. Maximal degree in co-relation 47193. Up to 4898 conditions per place. [2024-06-27 20:12:13,970 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 267 selfloop transitions, 35 changer transitions 0/305 dead transitions. [2024-06-27 20:12:13,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 305 transitions, 4209 flow [2024-06-27 20:12:13,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:12:13,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:12:13,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 20:12:13,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-27 20:12:13,989 INFO L175 Difference]: Start difference. First operand has 204 places, 265 transitions, 3277 flow. Second operand 9 states and 163 transitions. [2024-06-27 20:12:13,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 305 transitions, 4209 flow [2024-06-27 20:12:14,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 305 transitions, 4037 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-27 20:12:14,570 INFO L231 Difference]: Finished difference. Result has 206 places, 268 transitions, 3321 flow [2024-06-27 20:12:14,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3105, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3321, PETRI_PLACES=206, PETRI_TRANSITIONS=268} [2024-06-27 20:12:14,570 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 164 predicate places. [2024-06-27 20:12:14,571 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 268 transitions, 3321 flow [2024-06-27 20:12:14,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:14,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:14,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:14,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 20:12:14,571 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:14,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:14,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1618478572, now seen corresponding path program 4 times [2024-06-27 20:12:14,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:14,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277501400] [2024-06-27 20:12:14,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:14,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:14,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:15,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:15,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:15,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277501400] [2024-06-27 20:12:15,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277501400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:15,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:15,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:12:15,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668653040] [2024-06-27 20:12:15,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:15,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:12:15,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:15,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:12:15,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:12:15,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:12:15,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 268 transitions, 3321 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:15,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:15,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:12:15,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:16,681 INFO L124 PetriNetUnfolderBase]: 3374/5060 cut-off events. [2024-06-27 20:12:16,682 INFO L125 PetriNetUnfolderBase]: For 472842/472842 co-relation queries the response was YES. [2024-06-27 20:12:16,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46423 conditions, 5060 events. 3374/5060 cut-off events. For 472842/472842 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 26169 event pairs, 834 based on Foata normal form. 30/5089 useless extension candidates. Maximal degree in co-relation 46323. Up to 4652 conditions per place. [2024-06-27 20:12:16,735 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 274 selfloop transitions, 46 changer transitions 0/323 dead transitions. [2024-06-27 20:12:16,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 323 transitions, 4466 flow [2024-06-27 20:12:16,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:12:16,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:12:16,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 203 transitions. [2024-06-27 20:12:16,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4501108647450111 [2024-06-27 20:12:16,737 INFO L175 Difference]: Start difference. First operand has 206 places, 268 transitions, 3321 flow. Second operand 11 states and 203 transitions. [2024-06-27 20:12:16,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 323 transitions, 4466 flow [2024-06-27 20:12:17,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 323 transitions, 4280 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-27 20:12:17,193 INFO L231 Difference]: Finished difference. Result has 210 places, 270 transitions, 3366 flow [2024-06-27 20:12:17,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3135, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3366, PETRI_PLACES=210, PETRI_TRANSITIONS=270} [2024-06-27 20:12:17,193 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-27 20:12:17,193 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 270 transitions, 3366 flow [2024-06-27 20:12:17,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:17,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:17,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:17,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 20:12:17,194 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:17,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:17,194 INFO L85 PathProgramCache]: Analyzing trace with hash -906020802, now seen corresponding path program 5 times [2024-06-27 20:12:17,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:17,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037477395] [2024-06-27 20:12:17,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:17,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:17,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:17,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:17,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:17,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037477395] [2024-06-27 20:12:17,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037477395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:17,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:17,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:12:17,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588776166] [2024-06-27 20:12:17,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:17,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:12:17,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:17,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:12:17,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:12:18,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:12:18,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 270 transitions, 3366 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:18,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:18,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:12:18,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:19,226 INFO L124 PetriNetUnfolderBase]: 3691/5569 cut-off events. [2024-06-27 20:12:19,227 INFO L125 PetriNetUnfolderBase]: For 553537/553540 co-relation queries the response was YES. [2024-06-27 20:12:19,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53538 conditions, 5569 events. 3691/5569 cut-off events. For 553537/553540 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 29781 event pairs, 845 based on Foata normal form. 26/5592 useless extension candidates. Maximal degree in co-relation 53437. Up to 4344 conditions per place. [2024-06-27 20:12:19,286 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 238 selfloop transitions, 88 changer transitions 0/329 dead transitions. [2024-06-27 20:12:19,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 329 transitions, 5114 flow [2024-06-27 20:12:19,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:12:19,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:12:19,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-27 20:12:19,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48292682926829267 [2024-06-27 20:12:19,296 INFO L175 Difference]: Start difference. First operand has 210 places, 270 transitions, 3366 flow. Second operand 10 states and 198 transitions. [2024-06-27 20:12:19,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 329 transitions, 5114 flow [2024-06-27 20:12:19,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 329 transitions, 4895 flow, removed 43 selfloop flow, removed 12 redundant places. [2024-06-27 20:12:19,943 INFO L231 Difference]: Finished difference. Result has 209 places, 274 transitions, 3547 flow [2024-06-27 20:12:19,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3147, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3547, PETRI_PLACES=209, PETRI_TRANSITIONS=274} [2024-06-27 20:12:19,944 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 167 predicate places. [2024-06-27 20:12:19,944 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 274 transitions, 3547 flow [2024-06-27 20:12:19,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:19,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:19,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:19,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 20:12:19,945 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:19,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:19,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1479950422, now seen corresponding path program 6 times [2024-06-27 20:12:19,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:19,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299084602] [2024-06-27 20:12:19,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:19,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:19,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:20,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:20,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:20,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299084602] [2024-06-27 20:12:20,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299084602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:20,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:20,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:12:20,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063024046] [2024-06-27 20:12:20,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:20,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:12:20,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:20,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:12:20,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:12:20,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:12:20,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 274 transitions, 3547 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:20,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:20,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:12:20,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:22,235 INFO L124 PetriNetUnfolderBase]: 3843/5817 cut-off events. [2024-06-27 20:12:22,236 INFO L125 PetriNetUnfolderBase]: For 598382/598385 co-relation queries the response was YES. [2024-06-27 20:12:22,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56149 conditions, 5817 events. 3843/5817 cut-off events. For 598382/598385 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 31543 event pairs, 892 based on Foata normal form. 38/5852 useless extension candidates. Maximal degree in co-relation 56048. Up to 4924 conditions per place. [2024-06-27 20:12:22,301 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 235 selfloop transitions, 92 changer transitions 0/330 dead transitions. [2024-06-27 20:12:22,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 330 transitions, 4938 flow [2024-06-27 20:12:22,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:12:22,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:12:22,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 211 transitions. [2024-06-27 20:12:22,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4678492239467849 [2024-06-27 20:12:22,302 INFO L175 Difference]: Start difference. First operand has 209 places, 274 transitions, 3547 flow. Second operand 11 states and 211 transitions. [2024-06-27 20:12:22,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 330 transitions, 4938 flow [2024-06-27 20:12:22,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 330 transitions, 4713 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-27 20:12:22,965 INFO L231 Difference]: Finished difference. Result has 214 places, 276 transitions, 3644 flow [2024-06-27 20:12:22,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3324, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3644, PETRI_PLACES=214, PETRI_TRANSITIONS=276} [2024-06-27 20:12:22,966 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-27 20:12:22,966 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 276 transitions, 3644 flow [2024-06-27 20:12:22,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:22,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:22,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:22,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 20:12:22,966 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:22,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:22,967 INFO L85 PathProgramCache]: Analyzing trace with hash -900302790, now seen corresponding path program 2 times [2024-06-27 20:12:22,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:22,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857164002] [2024-06-27 20:12:22,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:22,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:22,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:23,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:23,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:23,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857164002] [2024-06-27 20:12:23,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857164002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:23,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:23,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:12:23,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572444460] [2024-06-27 20:12:23,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:23,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:12:23,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:23,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:12:23,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:12:24,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:12:24,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 276 transitions, 3644 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:24,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:24,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:12:24,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:25,271 INFO L124 PetriNetUnfolderBase]: 3846/5822 cut-off events. [2024-06-27 20:12:25,271 INFO L125 PetriNetUnfolderBase]: For 556868/556871 co-relation queries the response was YES. [2024-06-27 20:12:25,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56034 conditions, 5822 events. 3846/5822 cut-off events. For 556868/556871 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 31630 event pairs, 880 based on Foata normal form. 8/5827 useless extension candidates. Maximal degree in co-relation 55931. Up to 5282 conditions per place. [2024-06-27 20:12:25,339 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 232 selfloop transitions, 81 changer transitions 0/316 dead transitions. [2024-06-27 20:12:25,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 316 transitions, 4723 flow [2024-06-27 20:12:25,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:12:25,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:12:25,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 20:12:25,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-27 20:12:25,341 INFO L175 Difference]: Start difference. First operand has 214 places, 276 transitions, 3644 flow. Second operand 9 states and 170 transitions. [2024-06-27 20:12:25,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 316 transitions, 4723 flow [2024-06-27 20:12:26,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 316 transitions, 4470 flow, removed 38 selfloop flow, removed 9 redundant places. [2024-06-27 20:12:26,123 INFO L231 Difference]: Finished difference. Result has 214 places, 279 transitions, 3706 flow [2024-06-27 20:12:26,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3391, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3706, PETRI_PLACES=214, PETRI_TRANSITIONS=279} [2024-06-27 20:12:26,124 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-27 20:12:26,124 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 279 transitions, 3706 flow [2024-06-27 20:12:26,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:26,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:26,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:26,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 20:12:26,124 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:26,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:26,125 INFO L85 PathProgramCache]: Analyzing trace with hash -900510552, now seen corresponding path program 7 times [2024-06-27 20:12:26,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:26,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559570112] [2024-06-27 20:12:26,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:26,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:26,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:26,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:26,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:26,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559570112] [2024-06-27 20:12:26,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559570112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:26,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:26,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:12:26,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454955031] [2024-06-27 20:12:26,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:26,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:12:26,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:26,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:12:26,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:12:27,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:12:27,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 279 transitions, 3706 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:27,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:27,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:12:27,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:28,225 INFO L124 PetriNetUnfolderBase]: 3859/5845 cut-off events. [2024-06-27 20:12:28,225 INFO L125 PetriNetUnfolderBase]: For 572957/572960 co-relation queries the response was YES. [2024-06-27 20:12:28,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54683 conditions, 5845 events. 3859/5845 cut-off events. For 572957/572960 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 31725 event pairs, 879 based on Foata normal form. 32/5874 useless extension candidates. Maximal degree in co-relation 54579. Up to 5077 conditions per place. [2024-06-27 20:12:28,296 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 238 selfloop transitions, 86 changer transitions 0/327 dead transitions. [2024-06-27 20:12:28,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 327 transitions, 4861 flow [2024-06-27 20:12:28,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:12:28,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:12:28,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-27 20:12:28,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658536585365854 [2024-06-27 20:12:28,298 INFO L175 Difference]: Start difference. First operand has 214 places, 279 transitions, 3706 flow. Second operand 10 states and 191 transitions. [2024-06-27 20:12:28,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 327 transitions, 4861 flow [2024-06-27 20:12:28,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 327 transitions, 4573 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-27 20:12:28,958 INFO L231 Difference]: Finished difference. Result has 217 places, 281 transitions, 3734 flow [2024-06-27 20:12:28,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3418, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3734, PETRI_PLACES=217, PETRI_TRANSITIONS=281} [2024-06-27 20:12:28,959 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 175 predicate places. [2024-06-27 20:12:28,959 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 281 transitions, 3734 flow [2024-06-27 20:12:28,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:28,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:28,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:28,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 20:12:28,959 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:28,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:28,960 INFO L85 PathProgramCache]: Analyzing trace with hash -900295350, now seen corresponding path program 3 times [2024-06-27 20:12:28,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:28,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991743346] [2024-06-27 20:12:28,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:28,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:28,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:29,766 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 20:12:29,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:29,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991743346] [2024-06-27 20:12:29,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991743346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:29,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:29,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:12:29,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581460710] [2024-06-27 20:12:29,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:29,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:12:29,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:29,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:12:29,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:12:29,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:12:29,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 281 transitions, 3734 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:29,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:29,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:12:29,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:30,997 INFO L124 PetriNetUnfolderBase]: 3887/5889 cut-off events. [2024-06-27 20:12:30,997 INFO L125 PetriNetUnfolderBase]: For 561352/561355 co-relation queries the response was YES. [2024-06-27 20:12:31,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55310 conditions, 5889 events. 3887/5889 cut-off events. For 561352/561355 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 32048 event pairs, 844 based on Foata normal form. 8/5894 useless extension candidates. Maximal degree in co-relation 55205. Up to 5237 conditions per place. [2024-06-27 20:12:31,064 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 229 selfloop transitions, 92 changer transitions 0/324 dead transitions. [2024-06-27 20:12:31,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 324 transitions, 4905 flow [2024-06-27 20:12:31,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:12:31,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:12:31,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 20:12:31,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-27 20:12:31,066 INFO L175 Difference]: Start difference. First operand has 217 places, 281 transitions, 3734 flow. Second operand 9 states and 170 transitions. [2024-06-27 20:12:31,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 324 transitions, 4905 flow [2024-06-27 20:12:31,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 324 transitions, 4652 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-27 20:12:31,788 INFO L231 Difference]: Finished difference. Result has 219 places, 287 transitions, 3908 flow [2024-06-27 20:12:31,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3481, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3908, PETRI_PLACES=219, PETRI_TRANSITIONS=287} [2024-06-27 20:12:31,789 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 177 predicate places. [2024-06-27 20:12:31,789 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 287 transitions, 3908 flow [2024-06-27 20:12:31,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:31,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:31,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:31,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 20:12:31,789 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 20:12:31,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:31,790 INFO L85 PathProgramCache]: Analyzing trace with hash -600663492, now seen corresponding path program 1 times [2024-06-27 20:12:31,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:31,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493215777] [2024-06-27 20:12:31,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:31,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:31,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:32,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:32,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:32,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493215777] [2024-06-27 20:12:32,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493215777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:32,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:32,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:12:32,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047458179] [2024-06-27 20:12:32,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:32,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:12:32,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:32,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:12:32,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:12:32,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:12:32,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 287 transitions, 3908 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 20:12:32,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:32,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:12:32,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:33,346 INFO L124 PetriNetUnfolderBase]: 3761/5754 cut-off events. [2024-06-27 20:12:33,346 INFO L125 PetriNetUnfolderBase]: For 569969/569989 co-relation queries the response was YES. [2024-06-27 20:12:33,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54606 conditions, 5754 events. 3761/5754 cut-off events. For 569969/569989 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 31978 event pairs, 959 based on Foata normal form. 11/5727 useless extension candidates. Maximal degree in co-relation 54499. Up to 5517 conditions per place. [2024-06-27 20:12:33,410 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 271 selfloop transitions, 28 changer transitions 0/317 dead transitions. [2024-06-27 20:12:33,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 317 transitions, 4768 flow [2024-06-27 20:12:33,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:12:33,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:12:33,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-27 20:12:33,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445993031358885 [2024-06-27 20:12:33,412 INFO L175 Difference]: Start difference. First operand has 219 places, 287 transitions, 3908 flow. Second operand 7 states and 128 transitions. [2024-06-27 20:12:33,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 317 transitions, 4768 flow [2024-06-27 20:12:34,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 317 transitions, 4480 flow, removed 94 selfloop flow, removed 5 redundant places. [2024-06-27 20:12:34,075 INFO L231 Difference]: Finished difference. Result has 222 places, 296 transitions, 3801 flow [2024-06-27 20:12:34,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3620, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3801, PETRI_PLACES=222, PETRI_TRANSITIONS=296} [2024-06-27 20:12:34,075 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-27 20:12:34,075 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 296 transitions, 3801 flow [2024-06-27 20:12:34,076 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 20:12:34,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:34,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:34,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 20:12:34,076 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:34,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:34,078 INFO L85 PathProgramCache]: Analyzing trace with hash 549600490, now seen corresponding path program 4 times [2024-06-27 20:12:34,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:34,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311273987] [2024-06-27 20:12:34,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:34,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:34,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:35,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:35,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:35,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311273987] [2024-06-27 20:12:35,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311273987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:35,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:35,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:12:35,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029578907] [2024-06-27 20:12:35,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:35,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:12:35,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:35,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:12:35,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:12:35,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:12:35,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 296 transitions, 3801 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:35,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:35,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:12:35,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:36,293 INFO L124 PetriNetUnfolderBase]: 3974/6012 cut-off events. [2024-06-27 20:12:36,293 INFO L125 PetriNetUnfolderBase]: For 585526/585526 co-relation queries the response was YES. [2024-06-27 20:12:36,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56603 conditions, 6012 events. 3974/6012 cut-off events. For 585526/585526 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 32731 event pairs, 985 based on Foata normal form. 6/6017 useless extension candidates. Maximal degree in co-relation 56493. Up to 5838 conditions per place. [2024-06-27 20:12:36,372 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 282 selfloop transitions, 44 changer transitions 0/329 dead transitions. [2024-06-27 20:12:36,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 329 transitions, 4683 flow [2024-06-27 20:12:36,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:12:36,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:12:36,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 20:12:36,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-27 20:12:36,373 INFO L175 Difference]: Start difference. First operand has 222 places, 296 transitions, 3801 flow. Second operand 9 states and 158 transitions. [2024-06-27 20:12:36,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 329 transitions, 4683 flow [2024-06-27 20:12:37,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 329 transitions, 4614 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-27 20:12:37,044 INFO L231 Difference]: Finished difference. Result has 228 places, 299 transitions, 3987 flow [2024-06-27 20:12:37,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3732, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3987, PETRI_PLACES=228, PETRI_TRANSITIONS=299} [2024-06-27 20:12:37,044 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-27 20:12:37,045 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 299 transitions, 3987 flow [2024-06-27 20:12:37,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:37,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:37,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:37,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 20:12:37,045 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:37,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:37,046 INFO L85 PathProgramCache]: Analyzing trace with hash 549607930, now seen corresponding path program 5 times [2024-06-27 20:12:37,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:37,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008320620] [2024-06-27 20:12:37,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:37,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:37,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:38,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:38,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:38,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008320620] [2024-06-27 20:12:38,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008320620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:38,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:38,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:12:38,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278392225] [2024-06-27 20:12:38,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:38,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:12:38,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:38,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:12:38,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:12:38,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:12:38,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 299 transitions, 3987 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:38,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:38,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:12:38,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:39,441 INFO L124 PetriNetUnfolderBase]: 3999/6051 cut-off events. [2024-06-27 20:12:39,441 INFO L125 PetriNetUnfolderBase]: For 607872/607872 co-relation queries the response was YES. [2024-06-27 20:12:39,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57356 conditions, 6051 events. 3999/6051 cut-off events. For 607872/607872 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 32968 event pairs, 1011 based on Foata normal form. 6/6056 useless extension candidates. Maximal degree in co-relation 57244. Up to 5815 conditions per place. [2024-06-27 20:12:39,511 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 281 selfloop transitions, 48 changer transitions 0/332 dead transitions. [2024-06-27 20:12:39,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 332 transitions, 4879 flow [2024-06-27 20:12:39,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:12:39,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:12:39,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 20:12:39,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-27 20:12:39,513 INFO L175 Difference]: Start difference. First operand has 228 places, 299 transitions, 3987 flow. Second operand 9 states and 159 transitions. [2024-06-27 20:12:39,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 332 transitions, 4879 flow [2024-06-27 20:12:40,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 332 transitions, 4650 flow, removed 73 selfloop flow, removed 7 redundant places. [2024-06-27 20:12:40,224 INFO L231 Difference]: Finished difference. Result has 230 places, 302 transitions, 4026 flow [2024-06-27 20:12:40,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3758, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4026, PETRI_PLACES=230, PETRI_TRANSITIONS=302} [2024-06-27 20:12:40,225 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-27 20:12:40,225 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 302 transitions, 4026 flow [2024-06-27 20:12:40,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:40,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:40,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:40,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 20:12:40,225 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:40,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:40,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1804970042, now seen corresponding path program 6 times [2024-06-27 20:12:40,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:40,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777795062] [2024-06-27 20:12:40,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:40,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:40,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:41,030 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 20:12:41,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:41,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777795062] [2024-06-27 20:12:41,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777795062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:41,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:41,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:12:41,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437054006] [2024-06-27 20:12:41,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:41,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:12:41,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:41,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:12:41,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:12:41,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:12:41,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 302 transitions, 4026 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:41,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:41,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:12:41,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:42,349 INFO L124 PetriNetUnfolderBase]: 4027/6095 cut-off events. [2024-06-27 20:12:42,349 INFO L125 PetriNetUnfolderBase]: For 627481/627481 co-relation queries the response was YES. [2024-06-27 20:12:42,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58118 conditions, 6095 events. 4027/6095 cut-off events. For 627481/627481 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 33287 event pairs, 987 based on Foata normal form. 6/6100 useless extension candidates. Maximal degree in co-relation 58005. Up to 5806 conditions per place. [2024-06-27 20:12:42,425 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 288 selfloop transitions, 46 changer transitions 0/337 dead transitions. [2024-06-27 20:12:42,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 337 transitions, 5062 flow [2024-06-27 20:12:42,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:12:42,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:12:42,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 20:12:42,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-27 20:12:42,427 INFO L175 Difference]: Start difference. First operand has 230 places, 302 transitions, 4026 flow. Second operand 9 states and 161 transitions. [2024-06-27 20:12:42,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 337 transitions, 5062 flow [2024-06-27 20:12:43,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 337 transitions, 4818 flow, removed 76 selfloop flow, removed 7 redundant places. [2024-06-27 20:12:43,257 INFO L231 Difference]: Finished difference. Result has 232 places, 305 transitions, 4052 flow [2024-06-27 20:12:43,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3782, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4052, PETRI_PLACES=232, PETRI_TRANSITIONS=305} [2024-06-27 20:12:43,265 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-27 20:12:43,265 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 305 transitions, 4052 flow [2024-06-27 20:12:43,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:43,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:43,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:43,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 20:12:43,266 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:43,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:43,267 INFO L85 PathProgramCache]: Analyzing trace with hash 558804700, now seen corresponding path program 7 times [2024-06-27 20:12:43,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:43,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709066526] [2024-06-27 20:12:43,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:43,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:43,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:44,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:44,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:44,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709066526] [2024-06-27 20:12:44,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709066526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:44,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:44,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:12:44,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997298502] [2024-06-27 20:12:44,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:44,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:12:44,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:44,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:12:44,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:12:44,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:12:44,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 305 transitions, 4052 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:44,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:44,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:12:44,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:45,521 INFO L124 PetriNetUnfolderBase]: 4052/6134 cut-off events. [2024-06-27 20:12:45,521 INFO L125 PetriNetUnfolderBase]: For 648999/648999 co-relation queries the response was YES. [2024-06-27 20:12:45,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58844 conditions, 6134 events. 4052/6134 cut-off events. For 648999/648999 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 33393 event pairs, 978 based on Foata normal form. 6/6139 useless extension candidates. Maximal degree in co-relation 58730. Up to 5984 conditions per place. [2024-06-27 20:12:45,594 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 301 selfloop transitions, 34 changer transitions 0/338 dead transitions. [2024-06-27 20:12:45,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 338 transitions, 4966 flow [2024-06-27 20:12:45,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:12:45,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:12:45,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 20:12:45,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-27 20:12:45,596 INFO L175 Difference]: Start difference. First operand has 232 places, 305 transitions, 4052 flow. Second operand 9 states and 156 transitions. [2024-06-27 20:12:45,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 338 transitions, 4966 flow [2024-06-27 20:12:46,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 338 transitions, 4720 flow, removed 79 selfloop flow, removed 7 redundant places. [2024-06-27 20:12:46,516 INFO L231 Difference]: Finished difference. Result has 234 places, 308 transitions, 4058 flow [2024-06-27 20:12:46,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3806, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4058, PETRI_PLACES=234, PETRI_TRANSITIONS=308} [2024-06-27 20:12:46,516 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-27 20:12:46,516 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 308 transitions, 4058 flow [2024-06-27 20:12:46,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:46,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:46,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:46,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 20:12:46,517 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:46,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:46,517 INFO L85 PathProgramCache]: Analyzing trace with hash 279763338, now seen corresponding path program 8 times [2024-06-27 20:12:46,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:46,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181139641] [2024-06-27 20:12:46,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:46,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:46,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:47,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:47,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:47,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181139641] [2024-06-27 20:12:47,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181139641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:47,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:47,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:12:47,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771304898] [2024-06-27 20:12:47,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:47,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:12:47,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:47,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:12:47,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:12:47,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:12:47,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 308 transitions, 4058 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:47,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:47,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:12:47,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:48,867 INFO L124 PetriNetUnfolderBase]: 4188/6354 cut-off events. [2024-06-27 20:12:48,868 INFO L125 PetriNetUnfolderBase]: For 737099/737099 co-relation queries the response was YES. [2024-06-27 20:12:48,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60961 conditions, 6354 events. 4188/6354 cut-off events. For 737099/737099 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 35124 event pairs, 1007 based on Foata normal form. 30/6383 useless extension candidates. Maximal degree in co-relation 60846. Up to 6021 conditions per place. [2024-06-27 20:12:48,945 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 310 selfloop transitions, 35 changer transitions 0/348 dead transitions. [2024-06-27 20:12:48,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 348 transitions, 5037 flow [2024-06-27 20:12:48,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:12:48,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:12:48,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 20:12:48,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-27 20:12:48,946 INFO L175 Difference]: Start difference. First operand has 234 places, 308 transitions, 4058 flow. Second operand 9 states and 161 transitions. [2024-06-27 20:12:48,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 348 transitions, 5037 flow [2024-06-27 20:12:49,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 348 transitions, 4809 flow, removed 82 selfloop flow, removed 7 redundant places. [2024-06-27 20:12:49,885 INFO L231 Difference]: Finished difference. Result has 237 places, 313 transitions, 4090 flow [2024-06-27 20:12:49,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3830, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4090, PETRI_PLACES=237, PETRI_TRANSITIONS=313} [2024-06-27 20:12:49,886 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-27 20:12:49,886 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 313 transitions, 4090 flow [2024-06-27 20:12:49,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:49,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:49,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:49,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 20:12:49,887 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:49,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:49,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1818106362, now seen corresponding path program 8 times [2024-06-27 20:12:49,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:49,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230877354] [2024-06-27 20:12:49,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:49,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:49,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:50,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:50,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:50,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230877354] [2024-06-27 20:12:50,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230877354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:50,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:50,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:12:50,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445311965] [2024-06-27 20:12:50,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:50,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:12:50,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:50,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:12:50,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:12:50,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:12:50,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 313 transitions, 4090 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:50,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:50,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:12:50,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:52,106 INFO L124 PetriNetUnfolderBase]: 4229/6430 cut-off events. [2024-06-27 20:12:52,107 INFO L125 PetriNetUnfolderBase]: For 721481/721481 co-relation queries the response was YES. [2024-06-27 20:12:52,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62085 conditions, 6430 events. 4229/6430 cut-off events. For 721481/721481 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 35879 event pairs, 1809 based on Foata normal form. 6/6435 useless extension candidates. Maximal degree in co-relation 61968. Up to 6034 conditions per place. [2024-06-27 20:12:52,179 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 295 selfloop transitions, 56 changer transitions 0/354 dead transitions. [2024-06-27 20:12:52,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 354 transitions, 5621 flow [2024-06-27 20:12:52,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:12:52,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:12:52,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-27 20:12:52,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4195121951219512 [2024-06-27 20:12:52,181 INFO L175 Difference]: Start difference. First operand has 237 places, 313 transitions, 4090 flow. Second operand 10 states and 172 transitions. [2024-06-27 20:12:52,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 354 transitions, 5621 flow [2024-06-27 20:12:53,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 354 transitions, 5454 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-27 20:12:53,122 INFO L231 Difference]: Finished difference. Result has 242 places, 321 transitions, 4435 flow [2024-06-27 20:12:53,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3925, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4435, PETRI_PLACES=242, PETRI_TRANSITIONS=321} [2024-06-27 20:12:53,123 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-27 20:12:53,124 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 321 transitions, 4435 flow [2024-06-27 20:12:53,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:53,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:53,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:53,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 20:12:53,124 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:53,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:53,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1804762280, now seen corresponding path program 9 times [2024-06-27 20:12:53,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:53,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256722564] [2024-06-27 20:12:53,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:53,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:53,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:53,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:53,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:53,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256722564] [2024-06-27 20:12:53,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256722564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:53,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:53,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:12:53,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224297362] [2024-06-27 20:12:53,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:53,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:12:53,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:53,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:12:53,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:12:54,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:12:54,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 321 transitions, 4435 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:54,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:54,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:12:54,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:55,453 INFO L124 PetriNetUnfolderBase]: 4353/6634 cut-off events. [2024-06-27 20:12:55,453 INFO L125 PetriNetUnfolderBase]: For 802607/802607 co-relation queries the response was YES. [2024-06-27 20:12:55,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64188 conditions, 6634 events. 4353/6634 cut-off events. For 802607/802607 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 37350 event pairs, 1821 based on Foata normal form. 30/6663 useless extension candidates. Maximal degree in co-relation 64069. Up to 6092 conditions per place. [2024-06-27 20:12:55,534 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 299 selfloop transitions, 62 changer transitions 0/364 dead transitions. [2024-06-27 20:12:55,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 364 transitions, 5599 flow [2024-06-27 20:12:55,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:12:55,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:12:55,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-27 20:12:55,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44390243902439025 [2024-06-27 20:12:55,536 INFO L175 Difference]: Start difference. First operand has 242 places, 321 transitions, 4435 flow. Second operand 10 states and 182 transitions. [2024-06-27 20:12:55,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 364 transitions, 5599 flow [2024-06-27 20:12:56,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 364 transitions, 5339 flow, removed 105 selfloop flow, removed 4 redundant places. [2024-06-27 20:12:56,575 INFO L231 Difference]: Finished difference. Result has 248 places, 323 transitions, 4467 flow [2024-06-27 20:12:56,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4175, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4467, PETRI_PLACES=248, PETRI_TRANSITIONS=323} [2024-06-27 20:12:56,575 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-27 20:12:56,576 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 323 transitions, 4467 flow [2024-06-27 20:12:56,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:56,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:56,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:56,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 20:12:56,576 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:56,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:56,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1799405852, now seen corresponding path program 9 times [2024-06-27 20:12:56,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:56,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264488565] [2024-06-27 20:12:56,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:56,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:56,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:57,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:57,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:57,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264488565] [2024-06-27 20:12:57,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264488565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:57,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:57,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:12:57,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51180600] [2024-06-27 20:12:57,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:57,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:12:57,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:57,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:12:57,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:12:57,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:12:57,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 323 transitions, 4467 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:57,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:57,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:12:57,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:58,900 INFO L124 PetriNetUnfolderBase]: 4343/6620 cut-off events. [2024-06-27 20:12:58,900 INFO L125 PetriNetUnfolderBase]: For 752748/752748 co-relation queries the response was YES. [2024-06-27 20:12:58,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63690 conditions, 6620 events. 4343/6620 cut-off events. For 752748/752748 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 37319 event pairs, 1820 based on Foata normal form. 6/6625 useless extension candidates. Maximal degree in co-relation 63568. Up to 6318 conditions per place. [2024-06-27 20:12:58,982 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 306 selfloop transitions, 46 changer transitions 0/355 dead transitions. [2024-06-27 20:12:58,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 355 transitions, 5515 flow [2024-06-27 20:12:58,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:12:58,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:12:58,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 20:12:58,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-27 20:12:58,984 INFO L175 Difference]: Start difference. First operand has 248 places, 323 transitions, 4467 flow. Second operand 9 states and 161 transitions. [2024-06-27 20:12:58,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 355 transitions, 5515 flow [2024-06-27 20:13:00,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 355 transitions, 5124 flow, removed 127 selfloop flow, removed 8 redundant places. [2024-06-27 20:13:00,050 INFO L231 Difference]: Finished difference. Result has 249 places, 323 transitions, 4176 flow [2024-06-27 20:13:00,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4076, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4176, PETRI_PLACES=249, PETRI_TRANSITIONS=323} [2024-06-27 20:13:00,051 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-27 20:13:00,051 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 323 transitions, 4176 flow [2024-06-27 20:13:00,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:00,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:00,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:00,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 20:13:00,052 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:00,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:00,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1812528780, now seen corresponding path program 10 times [2024-06-27 20:13:00,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:00,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241214407] [2024-06-27 20:13:00,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:00,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:00,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:00,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:00,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:00,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241214407] [2024-06-27 20:13:00,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241214407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:00,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:00,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:13:00,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883080821] [2024-06-27 20:13:00,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:00,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:13:00,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:00,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:13:00,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:13:00,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:13:00,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 323 transitions, 4176 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:00,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:00,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:13:00,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:02,337 INFO L124 PetriNetUnfolderBase]: 4503/6876 cut-off events. [2024-06-27 20:13:02,337 INFO L125 PetriNetUnfolderBase]: For 817415/817415 co-relation queries the response was YES. [2024-06-27 20:13:02,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64916 conditions, 6876 events. 4503/6876 cut-off events. For 817415/817415 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 39140 event pairs, 1834 based on Foata normal form. 30/6905 useless extension candidates. Maximal degree in co-relation 64793. Up to 6334 conditions per place. [2024-06-27 20:13:02,424 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 305 selfloop transitions, 65 changer transitions 0/373 dead transitions. [2024-06-27 20:13:02,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 373 transitions, 5549 flow [2024-06-27 20:13:02,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:13:02,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:13:02,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-27 20:13:02,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44390243902439025 [2024-06-27 20:13:02,425 INFO L175 Difference]: Start difference. First operand has 249 places, 323 transitions, 4176 flow. Second operand 10 states and 182 transitions. [2024-06-27 20:13:02,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 373 transitions, 5549 flow [2024-06-27 20:13:03,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 373 transitions, 5439 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 20:13:03,265 INFO L231 Difference]: Finished difference. Result has 253 places, 332 transitions, 4470 flow [2024-06-27 20:13:03,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4066, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4470, PETRI_PLACES=253, PETRI_TRANSITIONS=332} [2024-06-27 20:13:03,266 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-27 20:13:03,266 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 332 transitions, 4470 flow [2024-06-27 20:13:03,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:03,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:03,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:03,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 20:13:03,267 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:03,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:03,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1799252030, now seen corresponding path program 11 times [2024-06-27 20:13:03,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:03,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054539817] [2024-06-27 20:13:03,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:03,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:03,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:04,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:04,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:04,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054539817] [2024-06-27 20:13:04,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054539817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:04,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:04,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:13:04,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855197864] [2024-06-27 20:13:04,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:04,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:13:04,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:04,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:13:04,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:13:04,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:13:04,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 332 transitions, 4470 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:04,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:04,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:13:04,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:05,779 INFO L124 PetriNetUnfolderBase]: 4744/7267 cut-off events. [2024-06-27 20:13:05,780 INFO L125 PetriNetUnfolderBase]: For 938853/938853 co-relation queries the response was YES. [2024-06-27 20:13:06,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72351 conditions, 7267 events. 4744/7267 cut-off events. For 938853/938853 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 41998 event pairs, 1854 based on Foata normal form. 24/7290 useless extension candidates. Maximal degree in co-relation 72225. Up to 5636 conditions per place. [2024-06-27 20:13:06,115 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 316 selfloop transitions, 67 changer transitions 0/386 dead transitions. [2024-06-27 20:13:06,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 386 transitions, 6474 flow [2024-06-27 20:13:06,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:13:06,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:13:06,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-27 20:13:06,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-27 20:13:06,117 INFO L175 Difference]: Start difference. First operand has 253 places, 332 transitions, 4470 flow. Second operand 10 states and 188 transitions. [2024-06-27 20:13:06,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 386 transitions, 6474 flow [2024-06-27 20:13:07,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 386 transitions, 6266 flow, removed 67 selfloop flow, removed 5 redundant places. [2024-06-27 20:13:07,047 INFO L231 Difference]: Finished difference. Result has 259 places, 336 transitions, 4697 flow [2024-06-27 20:13:07,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4262, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4697, PETRI_PLACES=259, PETRI_TRANSITIONS=336} [2024-06-27 20:13:07,048 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-27 20:13:07,048 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 336 transitions, 4697 flow [2024-06-27 20:13:07,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:07,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:07,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:07,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 20:13:07,049 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:07,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:07,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1812384630, now seen corresponding path program 12 times [2024-06-27 20:13:07,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:07,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716176800] [2024-06-27 20:13:07,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:07,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:07,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:07,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:07,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:07,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716176800] [2024-06-27 20:13:07,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716176800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:07,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:07,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:13:07,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288555174] [2024-06-27 20:13:07,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:07,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:13:07,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:07,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:13:07,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:13:07,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:13:07,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 336 transitions, 4697 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:07,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:07,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:13:07,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:09,678 INFO L124 PetriNetUnfolderBase]: 4818/7393 cut-off events. [2024-06-27 20:13:09,679 INFO L125 PetriNetUnfolderBase]: For 958649/958649 co-relation queries the response was YES. [2024-06-27 20:13:09,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73101 conditions, 7393 events. 4818/7393 cut-off events. For 958649/958649 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 43047 event pairs, 1927 based on Foata normal form. 30/7422 useless extension candidates. Maximal degree in co-relation 72973. Up to 6696 conditions per place. [2024-06-27 20:13:09,773 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 297 selfloop transitions, 83 changer transitions 0/383 dead transitions. [2024-06-27 20:13:09,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 383 transitions, 6274 flow [2024-06-27 20:13:09,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:13:09,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:13:09,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-27 20:13:09,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44878048780487806 [2024-06-27 20:13:09,774 INFO L175 Difference]: Start difference. First operand has 259 places, 336 transitions, 4697 flow. Second operand 10 states and 184 transitions. [2024-06-27 20:13:09,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 383 transitions, 6274 flow [2024-06-27 20:13:10,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 383 transitions, 6030 flow, removed 86 selfloop flow, removed 6 redundant places. [2024-06-27 20:13:10,876 INFO L231 Difference]: Finished difference. Result has 264 places, 341 transitions, 4929 flow [2024-06-27 20:13:10,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4457, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4929, PETRI_PLACES=264, PETRI_TRANSITIONS=341} [2024-06-27 20:13:10,877 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 222 predicate places. [2024-06-27 20:13:10,877 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 341 transitions, 4929 flow [2024-06-27 20:13:10,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:10,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:10,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:10,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 20:13:10,877 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 20:13:10,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:10,878 INFO L85 PathProgramCache]: Analyzing trace with hash -2116224408, now seen corresponding path program 2 times [2024-06-27 20:13:10,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:10,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822162416] [2024-06-27 20:13:10,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:10,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:10,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:11,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:11,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:11,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822162416] [2024-06-27 20:13:11,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822162416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:11,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:11,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:13:11,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448786574] [2024-06-27 20:13:11,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:11,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:13:11,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:11,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:13:11,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:13:11,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:13:11,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 341 transitions, 4929 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 20:13:11,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:11,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:13:11,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:12,993 INFO L124 PetriNetUnfolderBase]: 4603/7128 cut-off events. [2024-06-27 20:13:12,994 INFO L125 PetriNetUnfolderBase]: For 911565/911605 co-relation queries the response was YES. [2024-06-27 20:13:13,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71756 conditions, 7128 events. 4603/7128 cut-off events. For 911565/911605 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 42476 event pairs, 1926 based on Foata normal form. 15/7076 useless extension candidates. Maximal degree in co-relation 71625. Up to 6925 conditions per place. [2024-06-27 20:13:13,109 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 317 selfloop transitions, 22 changer transitions 0/358 dead transitions. [2024-06-27 20:13:13,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 358 transitions, 5825 flow [2024-06-27 20:13:13,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:13:13,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:13:13,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 20:13:13,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-27 20:13:13,111 INFO L175 Difference]: Start difference. First operand has 264 places, 341 transitions, 4929 flow. Second operand 7 states and 120 transitions. [2024-06-27 20:13:13,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 358 transitions, 5825 flow [2024-06-27 20:13:14,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 358 transitions, 5512 flow, removed 85 selfloop flow, removed 8 redundant places. [2024-06-27 20:13:14,594 INFO L231 Difference]: Finished difference. Result has 263 places, 344 transitions, 4711 flow [2024-06-27 20:13:14,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4616, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4711, PETRI_PLACES=263, PETRI_TRANSITIONS=344} [2024-06-27 20:13:14,594 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-27 20:13:14,595 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 344 transitions, 4711 flow [2024-06-27 20:13:14,595 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 20:13:14,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:14,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:14,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 20:13:14,595 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 20:13:14,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:14,596 INFO L85 PathProgramCache]: Analyzing trace with hash -39976514, now seen corresponding path program 3 times [2024-06-27 20:13:14,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:14,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957771024] [2024-06-27 20:13:14,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:14,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:14,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:15,090 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 20:13:15,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:15,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957771024] [2024-06-27 20:13:15,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957771024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:15,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:15,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:13:15,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033327] [2024-06-27 20:13:15,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:15,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:13:15,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:15,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:13:15,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:13:15,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:13:15,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 344 transitions, 4711 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 20:13:15,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:15,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:13:15,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:16,594 INFO L124 PetriNetUnfolderBase]: 4586/7105 cut-off events. [2024-06-27 20:13:16,594 INFO L125 PetriNetUnfolderBase]: For 877253/877293 co-relation queries the response was YES. [2024-06-27 20:13:16,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69603 conditions, 7105 events. 4586/7105 cut-off events. For 877253/877293 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 42355 event pairs, 1927 based on Foata normal form. 13/7053 useless extension candidates. Maximal degree in co-relation 69472. Up to 6935 conditions per place. [2024-06-27 20:13:16,686 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 321 selfloop transitions, 15 changer transitions 0/355 dead transitions. [2024-06-27 20:13:16,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 355 transitions, 5411 flow [2024-06-27 20:13:16,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:13:16,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:13:16,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-27 20:13:16,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40069686411149824 [2024-06-27 20:13:16,687 INFO L175 Difference]: Start difference. First operand has 263 places, 344 transitions, 4711 flow. Second operand 7 states and 115 transitions. [2024-06-27 20:13:16,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 355 transitions, 5411 flow [2024-06-27 20:13:17,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 355 transitions, 5307 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-27 20:13:17,896 INFO L231 Difference]: Finished difference. Result has 265 places, 344 transitions, 4643 flow [2024-06-27 20:13:17,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4607, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4643, PETRI_PLACES=265, PETRI_TRANSITIONS=344} [2024-06-27 20:13:17,896 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-27 20:13:17,896 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 344 transitions, 4643 flow [2024-06-27 20:13:17,897 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 20:13:17,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:17,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:17,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 20:13:17,897 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 20:13:17,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:17,897 INFO L85 PathProgramCache]: Analyzing trace with hash -46636802, now seen corresponding path program 1 times [2024-06-27 20:13:17,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:17,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367188134] [2024-06-27 20:13:17,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:17,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:17,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:18,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:18,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:18,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367188134] [2024-06-27 20:13:18,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367188134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:18,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:18,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:13:18,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488326006] [2024-06-27 20:13:18,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:18,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:13:18,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:18,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:13:18,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:13:18,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:13:18,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 344 transitions, 4643 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 20:13:18,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:18,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:13:18,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:20,095 INFO L124 PetriNetUnfolderBase]: 4875/7474 cut-off events. [2024-06-27 20:13:20,095 INFO L125 PetriNetUnfolderBase]: For 894824/894824 co-relation queries the response was YES. [2024-06-27 20:13:20,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71876 conditions, 7474 events. 4875/7474 cut-off events. For 894824/894824 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 43627 event pairs, 2002 based on Foata normal form. 9/7482 useless extension candidates. Maximal degree in co-relation 71745. Up to 7283 conditions per place. [2024-06-27 20:13:20,182 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 336 selfloop transitions, 33 changer transitions 0/372 dead transitions. [2024-06-27 20:13:20,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 372 transitions, 5753 flow [2024-06-27 20:13:20,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:13:20,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:13:20,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 20:13:20,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-27 20:13:20,183 INFO L175 Difference]: Start difference. First operand has 265 places, 344 transitions, 4643 flow. Second operand 7 states and 127 transitions. [2024-06-27 20:13:20,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 372 transitions, 5753 flow [2024-06-27 20:13:21,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 372 transitions, 5695 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 20:13:21,483 INFO L231 Difference]: Finished difference. Result has 265 places, 351 transitions, 4795 flow [2024-06-27 20:13:21,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4585, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4795, PETRI_PLACES=265, PETRI_TRANSITIONS=351} [2024-06-27 20:13:21,484 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-27 20:13:21,484 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 351 transitions, 4795 flow [2024-06-27 20:13:21,484 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 20:13:21,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:21,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:21,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 20:13:21,485 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 20:13:21,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:21,485 INFO L85 PathProgramCache]: Analyzing trace with hash -2120508546, now seen corresponding path program 2 times [2024-06-27 20:13:21,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:21,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214502640] [2024-06-27 20:13:21,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:21,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:21,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:22,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:22,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:22,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214502640] [2024-06-27 20:13:22,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214502640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:22,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:22,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:13:22,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525027527] [2024-06-27 20:13:22,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:22,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:13:22,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:22,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:13:22,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:13:22,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:13:22,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 351 transitions, 4795 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 20:13:22,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:22,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:13:22,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:23,682 INFO L124 PetriNetUnfolderBase]: 4890/7497 cut-off events. [2024-06-27 20:13:23,682 INFO L125 PetriNetUnfolderBase]: For 907931/907934 co-relation queries the response was YES. [2024-06-27 20:13:23,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73037 conditions, 7497 events. 4890/7497 cut-off events. For 907931/907934 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 43760 event pairs, 2016 based on Foata normal form. 3/7497 useless extension candidates. Maximal degree in co-relation 72906. Up to 7291 conditions per place. [2024-06-27 20:13:23,781 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 336 selfloop transitions, 39 changer transitions 0/378 dead transitions. [2024-06-27 20:13:23,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 378 transitions, 6035 flow [2024-06-27 20:13:23,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:13:23,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:13:23,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 20:13:23,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-27 20:13:23,782 INFO L175 Difference]: Start difference. First operand has 265 places, 351 transitions, 4795 flow. Second operand 7 states and 127 transitions. [2024-06-27 20:13:23,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 378 transitions, 6035 flow [2024-06-27 20:13:25,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 378 transitions, 5923 flow, removed 45 selfloop flow, removed 3 redundant places. [2024-06-27 20:13:25,193 INFO L231 Difference]: Finished difference. Result has 269 places, 357 transitions, 4913 flow [2024-06-27 20:13:25,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4687, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4913, PETRI_PLACES=269, PETRI_TRANSITIONS=357} [2024-06-27 20:13:25,195 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-27 20:13:25,195 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 357 transitions, 4913 flow [2024-06-27 20:13:25,195 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 20:13:25,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:25,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:25,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 20:13:25,196 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 20:13:25,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:25,201 INFO L85 PathProgramCache]: Analyzing trace with hash -39970562, now seen corresponding path program 3 times [2024-06-27 20:13:25,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:25,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922343363] [2024-06-27 20:13:25,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:25,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:25,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:25,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:25,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:25,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922343363] [2024-06-27 20:13:25,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922343363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:25,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:25,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:13:25,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073521537] [2024-06-27 20:13:25,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:25,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:13:25,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:25,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:13:25,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:13:25,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:13:25,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 357 transitions, 4913 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 20:13:25,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:25,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:13:25,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:27,332 INFO L124 PetriNetUnfolderBase]: 4881/7485 cut-off events. [2024-06-27 20:13:27,332 INFO L125 PetriNetUnfolderBase]: For 921496/921499 co-relation queries the response was YES. [2024-06-27 20:13:27,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72924 conditions, 7485 events. 4881/7485 cut-off events. For 921496/921499 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 43708 event pairs, 2018 based on Foata normal form. 3/7485 useless extension candidates. Maximal degree in co-relation 72791. Up to 7287 conditions per place. [2024-06-27 20:13:27,445 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 331 selfloop transitions, 41 changer transitions 0/375 dead transitions. [2024-06-27 20:13:27,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 375 transitions, 5853 flow [2024-06-27 20:13:27,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:13:27,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:13:27,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 20:13:27,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355400696864111 [2024-06-27 20:13:27,446 INFO L175 Difference]: Start difference. First operand has 269 places, 357 transitions, 4913 flow. Second operand 7 states and 125 transitions. [2024-06-27 20:13:27,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 375 transitions, 5853 flow [2024-06-27 20:13:28,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 375 transitions, 5714 flow, removed 59 selfloop flow, removed 2 redundant places. [2024-06-27 20:13:28,896 INFO L231 Difference]: Finished difference. Result has 274 places, 357 transitions, 4863 flow [2024-06-27 20:13:28,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4774, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4863, PETRI_PLACES=274, PETRI_TRANSITIONS=357} [2024-06-27 20:13:28,897 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 232 predicate places. [2024-06-27 20:13:28,897 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 357 transitions, 4863 flow [2024-06-27 20:13:28,897 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 20:13:28,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:28,897 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 20:13:28,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 20:13:28,898 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 20:13:28,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:28,898 INFO L85 PathProgramCache]: Analyzing trace with hash -38114383, now seen corresponding path program 1 times [2024-06-27 20:13:28,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:28,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549654971] [2024-06-27 20:13:28,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:28,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:28,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:29,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:29,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:29,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549654971] [2024-06-27 20:13:29,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549654971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:29,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:29,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:13:29,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220874031] [2024-06-27 20:13:29,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:29,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:13:29,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:29,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:13:29,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:13:29,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:13:29,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 357 transitions, 4863 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 20:13:29,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:29,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:13:29,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:31,063 INFO L124 PetriNetUnfolderBase]: 4915/7524 cut-off events. [2024-06-27 20:13:31,063 INFO L125 PetriNetUnfolderBase]: For 930181/930187 co-relation queries the response was YES. [2024-06-27 20:13:31,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73329 conditions, 7524 events. 4915/7524 cut-off events. For 930181/930187 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 43837 event pairs, 1235 based on Foata normal form. 7/7530 useless extension candidates. Maximal degree in co-relation 73193. Up to 7437 conditions per place. [2024-06-27 20:13:31,192 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 361 selfloop transitions, 37 changer transitions 0/401 dead transitions. [2024-06-27 20:13:31,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 401 transitions, 5894 flow [2024-06-27 20:13:31,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:13:31,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:13:31,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-27 20:13:31,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40487804878048783 [2024-06-27 20:13:31,193 INFO L175 Difference]: Start difference. First operand has 274 places, 357 transitions, 4863 flow. Second operand 10 states and 166 transitions. [2024-06-27 20:13:31,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 401 transitions, 5894 flow [2024-06-27 20:13:32,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 401 transitions, 5789 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 20:13:32,717 INFO L231 Difference]: Finished difference. Result has 280 places, 371 transitions, 5031 flow [2024-06-27 20:13:32,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4758, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5031, PETRI_PLACES=280, PETRI_TRANSITIONS=371} [2024-06-27 20:13:32,718 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 238 predicate places. [2024-06-27 20:13:32,718 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 371 transitions, 5031 flow [2024-06-27 20:13:32,718 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 20:13:32,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:32,718 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 20:13:32,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 20:13:32,719 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 20:13:32,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:32,719 INFO L85 PathProgramCache]: Analyzing trace with hash 828329501, now seen corresponding path program 2 times [2024-06-27 20:13:32,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:32,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494874924] [2024-06-27 20:13:32,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:32,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:32,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:33,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:33,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:33,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494874924] [2024-06-27 20:13:33,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494874924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:33,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:33,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:13:33,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207110655] [2024-06-27 20:13:33,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:33,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:13:33,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:33,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:13:33,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:13:33,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:13:33,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 371 transitions, 5031 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 20:13:33,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:33,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:13:33,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:35,321 INFO L124 PetriNetUnfolderBase]: 5003/7661 cut-off events. [2024-06-27 20:13:35,321 INFO L125 PetriNetUnfolderBase]: For 954678/954686 co-relation queries the response was YES. [2024-06-27 20:13:35,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75017 conditions, 7661 events. 5003/7661 cut-off events. For 954678/954686 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 44669 event pairs, 1522 based on Foata normal form. 9/7669 useless extension candidates. Maximal degree in co-relation 74878. Up to 7520 conditions per place. [2024-06-27 20:13:35,451 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 370 selfloop transitions, 65 changer transitions 0/438 dead transitions. [2024-06-27 20:13:35,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 438 transitions, 6693 flow [2024-06-27 20:13:35,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:13:35,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:13:35,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-27 20:13:35,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121951219512195 [2024-06-27 20:13:35,453 INFO L175 Difference]: Start difference. First operand has 280 places, 371 transitions, 5031 flow. Second operand 10 states and 169 transitions. [2024-06-27 20:13:35,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 438 transitions, 6693 flow [2024-06-27 20:13:36,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 438 transitions, 6549 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 20:13:36,735 INFO L231 Difference]: Finished difference. Result has 289 places, 409 transitions, 5675 flow [2024-06-27 20:13:36,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4948, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5675, PETRI_PLACES=289, PETRI_TRANSITIONS=409} [2024-06-27 20:13:36,736 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-27 20:13:36,736 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 409 transitions, 5675 flow [2024-06-27 20:13:36,736 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 20:13:36,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:36,736 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 20:13:36,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 20:13:36,736 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 20:13:36,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:36,737 INFO L85 PathProgramCache]: Analyzing trace with hash 2118559481, now seen corresponding path program 3 times [2024-06-27 20:13:36,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:36,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959845883] [2024-06-27 20:13:36,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:36,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:36,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:37,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:37,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:37,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959845883] [2024-06-27 20:13:37,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959845883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:37,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:37,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:13:37,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984639947] [2024-06-27 20:13:37,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:37,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:13:37,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:37,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:13:37,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:13:37,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:13:37,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 409 transitions, 5675 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:37,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:37,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:13:37,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:38,860 INFO L124 PetriNetUnfolderBase]: 5032/7706 cut-off events. [2024-06-27 20:13:38,860 INFO L125 PetriNetUnfolderBase]: For 976049/976053 co-relation queries the response was YES. [2024-06-27 20:13:38,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76071 conditions, 7706 events. 5032/7706 cut-off events. For 976049/976053 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 44965 event pairs, 1636 based on Foata normal form. 5/7710 useless extension candidates. Maximal degree in co-relation 75927. Up to 7510 conditions per place. [2024-06-27 20:13:38,962 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 364 selfloop transitions, 80 changer transitions 0/447 dead transitions. [2024-06-27 20:13:38,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 447 transitions, 7000 flow [2024-06-27 20:13:38,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:13:38,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:13:38,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 20:13:38,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-27 20:13:38,964 INFO L175 Difference]: Start difference. First operand has 289 places, 409 transitions, 5675 flow. Second operand 8 states and 142 transitions. [2024-06-27 20:13:38,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 447 transitions, 7000 flow [2024-06-27 20:13:40,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 447 transitions, 6945 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-27 20:13:40,723 INFO L231 Difference]: Finished difference. Result has 297 places, 423 transitions, 6074 flow [2024-06-27 20:13:40,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5642, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6074, PETRI_PLACES=297, PETRI_TRANSITIONS=423} [2024-06-27 20:13:40,723 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 255 predicate places. [2024-06-27 20:13:40,723 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 423 transitions, 6074 flow [2024-06-27 20:13:40,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:40,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:40,724 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 20:13:40,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 20:13:40,724 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 20:13:40,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:40,724 INFO L85 PathProgramCache]: Analyzing trace with hash 191985655, now seen corresponding path program 1 times [2024-06-27 20:13:40,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:40,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229676816] [2024-06-27 20:13:40,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:40,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:40,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:41,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:41,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:41,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229676816] [2024-06-27 20:13:41,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229676816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:41,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:41,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:13:41,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491765195] [2024-06-27 20:13:41,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:41,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:13:41,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:41,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:13:41,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:13:41,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:13:41,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 423 transitions, 6074 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 20:13:41,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:41,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:13:41,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:43,110 INFO L124 PetriNetUnfolderBase]: 5234/8001 cut-off events. [2024-06-27 20:13:43,111 INFO L125 PetriNetUnfolderBase]: For 1026873/1026880 co-relation queries the response was YES. [2024-06-27 20:13:43,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79525 conditions, 8001 events. 5234/8001 cut-off events. For 1026873/1026880 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 46785 event pairs, 1558 based on Foata normal form. 9/8007 useless extension candidates. Maximal degree in co-relation 79377. Up to 7682 conditions per place. [2024-06-27 20:13:43,237 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 434 selfloop transitions, 68 changer transitions 0/505 dead transitions. [2024-06-27 20:13:43,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 505 transitions, 8307 flow [2024-06-27 20:13:43,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:13:43,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:13:43,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:13:43,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-27 20:13:43,239 INFO L175 Difference]: Start difference. First operand has 297 places, 423 transitions, 6074 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:13:43,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 505 transitions, 8307 flow [2024-06-27 20:13:45,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 505 transitions, 8198 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 20:13:45,076 INFO L231 Difference]: Finished difference. Result has 304 places, 463 transitions, 6741 flow [2024-06-27 20:13:45,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5965, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6741, PETRI_PLACES=304, PETRI_TRANSITIONS=463} [2024-06-27 20:13:45,076 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-27 20:13:45,076 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 463 transitions, 6741 flow [2024-06-27 20:13:45,077 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 20:13:45,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:45,077 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 20:13:45,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 20:13:45,077 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:45,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:45,077 INFO L85 PathProgramCache]: Analyzing trace with hash -398025023, now seen corresponding path program 1 times [2024-06-27 20:13:45,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:45,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691252571] [2024-06-27 20:13:45,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:45,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:45,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:46,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:46,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:46,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691252571] [2024-06-27 20:13:46,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691252571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:46,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:46,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:13:46,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729526938] [2024-06-27 20:13:46,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:46,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:13:46,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:46,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:13:46,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:13:46,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:13:46,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 463 transitions, 6741 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:46,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:46,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:13:46,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:48,555 INFO L124 PetriNetUnfolderBase]: 5934/9049 cut-off events. [2024-06-27 20:13:48,555 INFO L125 PetriNetUnfolderBase]: For 1191249/1191264 co-relation queries the response was YES. [2024-06-27 20:13:48,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90659 conditions, 9049 events. 5934/9049 cut-off events. For 1191249/1191264 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 53799 event pairs, 1398 based on Foata normal form. 30/9076 useless extension candidates. Maximal degree in co-relation 90507. Up to 7617 conditions per place. [2024-06-27 20:13:48,689 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 421 selfloop transitions, 211 changer transitions 0/635 dead transitions. [2024-06-27 20:13:48,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 635 transitions, 10426 flow [2024-06-27 20:13:48,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:13:48,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:13:48,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-27 20:13:48,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656319290465632 [2024-06-27 20:13:48,691 INFO L175 Difference]: Start difference. First operand has 304 places, 463 transitions, 6741 flow. Second operand 11 states and 210 transitions. [2024-06-27 20:13:48,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 635 transitions, 10426 flow [2024-06-27 20:13:50,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 635 transitions, 10372 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 20:13:50,743 INFO L231 Difference]: Finished difference. Result has 317 places, 551 transitions, 8683 flow [2024-06-27 20:13:50,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6687, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8683, PETRI_PLACES=317, PETRI_TRANSITIONS=551} [2024-06-27 20:13:50,748 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 275 predicate places. [2024-06-27 20:13:50,748 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 551 transitions, 8683 flow [2024-06-27 20:13:50,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:50,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:50,748 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 20:13:50,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 20:13:50,749 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 20:13:50,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:50,749 INFO L85 PathProgramCache]: Analyzing trace with hash 208280185, now seen corresponding path program 2 times [2024-06-27 20:13:50,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:50,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073263406] [2024-06-27 20:13:50,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:50,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:50,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:51,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:51,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:51,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073263406] [2024-06-27 20:13:51,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073263406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:51,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:51,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:13:51,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496798367] [2024-06-27 20:13:51,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:51,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:13:51,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:51,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:13:51,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:13:51,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:13:51,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 551 transitions, 8683 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 20:13:51,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:51,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:13:51,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:53,480 INFO L124 PetriNetUnfolderBase]: 5907/8999 cut-off events. [2024-06-27 20:13:53,480 INFO L125 PetriNetUnfolderBase]: For 1158059/1158066 co-relation queries the response was YES. [2024-06-27 20:13:53,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92810 conditions, 8999 events. 5907/8999 cut-off events. For 1158059/1158066 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 53364 event pairs, 1610 based on Foata normal form. 7/9003 useless extension candidates. Maximal degree in co-relation 92652. Up to 8674 conditions per place. [2024-06-27 20:13:53,621 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 507 selfloop transitions, 76 changer transitions 0/586 dead transitions. [2024-06-27 20:13:53,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 586 transitions, 10380 flow [2024-06-27 20:13:53,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:13:53,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:13:53,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 20:13:53,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 20:13:53,623 INFO L175 Difference]: Start difference. First operand has 317 places, 551 transitions, 8683 flow. Second operand 8 states and 144 transitions. [2024-06-27 20:13:53,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 586 transitions, 10380 flow [2024-06-27 20:13:56,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 586 transitions, 10027 flow, removed 82 selfloop flow, removed 3 redundant places. [2024-06-27 20:13:56,051 INFO L231 Difference]: Finished difference. Result has 324 places, 559 transitions, 8643 flow [2024-06-27 20:13:56,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8334, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8643, PETRI_PLACES=324, PETRI_TRANSITIONS=559} [2024-06-27 20:13:56,052 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 282 predicate places. [2024-06-27 20:13:56,052 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 559 transitions, 8643 flow [2024-06-27 20:13:56,052 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 20:13:56,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:56,053 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 20:13:56,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 20:13:56,053 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 20:13:56,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:56,053 INFO L85 PathProgramCache]: Analyzing trace with hash 357660221, now seen corresponding path program 4 times [2024-06-27 20:13:56,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:56,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053505362] [2024-06-27 20:13:56,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:56,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:56,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:56,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:56,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:56,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053505362] [2024-06-27 20:13:56,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053505362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:56,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:56,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:13:56,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315658137] [2024-06-27 20:13:56,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:56,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:13:56,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:56,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:13:56,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:13:56,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:13:56,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 559 transitions, 8643 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 20:13:56,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:56,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:13:56,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:58,920 INFO L124 PetriNetUnfolderBase]: 5904/8995 cut-off events. [2024-06-27 20:13:58,920 INFO L125 PetriNetUnfolderBase]: For 1170042/1170054 co-relation queries the response was YES. [2024-06-27 20:13:59,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91470 conditions, 8995 events. 5904/8995 cut-off events. For 1170042/1170054 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 53405 event pairs, 1636 based on Foata normal form. 13/9007 useless extension candidates. Maximal degree in co-relation 91309. Up to 8860 conditions per place. [2024-06-27 20:13:59,072 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 521 selfloop transitions, 54 changer transitions 0/578 dead transitions. [2024-06-27 20:13:59,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 578 transitions, 9859 flow [2024-06-27 20:13:59,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:13:59,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:13:59,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-27 20:13:59,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-27 20:13:59,074 INFO L175 Difference]: Start difference. First operand has 324 places, 559 transitions, 8643 flow. Second operand 9 states and 146 transitions. [2024-06-27 20:13:59,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 578 transitions, 9859 flow [2024-06-27 20:14:01,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 578 transitions, 9714 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-27 20:14:01,557 INFO L231 Difference]: Finished difference. Result has 329 places, 559 transitions, 8612 flow [2024-06-27 20:14:01,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8498, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8612, PETRI_PLACES=329, PETRI_TRANSITIONS=559} [2024-06-27 20:14:01,558 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 287 predicate places. [2024-06-27 20:14:01,558 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 559 transitions, 8612 flow [2024-06-27 20:14:01,558 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 20:14:01,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:01,558 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 20:14:01,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 20:14:01,559 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 20:14:01,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:01,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1623393407, now seen corresponding path program 5 times [2024-06-27 20:14:01,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:01,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192948665] [2024-06-27 20:14:01,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:01,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:01,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:02,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:02,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:02,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192948665] [2024-06-27 20:14:02,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192948665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:02,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:02,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:14:02,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900958703] [2024-06-27 20:14:02,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:02,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:14:02,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:02,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:14:02,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:14:02,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:14:02,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 559 transitions, 8612 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 20:14:02,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:02,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:14:02,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:04,709 INFO L124 PetriNetUnfolderBase]: 5914/9008 cut-off events. [2024-06-27 20:14:04,709 INFO L125 PetriNetUnfolderBase]: For 1194703/1194715 co-relation queries the response was YES. [2024-06-27 20:14:04,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91706 conditions, 9008 events. 5914/9008 cut-off events. For 1194703/1194715 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 53476 event pairs, 1743 based on Foata normal form. 13/9020 useless extension candidates. Maximal degree in co-relation 91544. Up to 8792 conditions per place. [2024-06-27 20:14:04,854 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 494 selfloop transitions, 95 changer transitions 0/592 dead transitions. [2024-06-27 20:14:04,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 592 transitions, 10181 flow [2024-06-27 20:14:04,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:14:04,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:14:04,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 20:14:04,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-27 20:14:04,855 INFO L175 Difference]: Start difference. First operand has 329 places, 559 transitions, 8612 flow. Second operand 9 states and 154 transitions. [2024-06-27 20:14:04,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 592 transitions, 10181 flow [2024-06-27 20:14:07,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 592 transitions, 10102 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 20:14:07,662 INFO L231 Difference]: Finished difference. Result has 334 places, 565 transitions, 8880 flow [2024-06-27 20:14:07,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8539, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8880, PETRI_PLACES=334, PETRI_TRANSITIONS=565} [2024-06-27 20:14:07,663 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 292 predicate places. [2024-06-27 20:14:07,663 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 565 transitions, 8880 flow [2024-06-27 20:14:07,663 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 20:14:07,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:07,663 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 20:14:07,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 20:14:07,664 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 20:14:07,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:07,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1446419103, now seen corresponding path program 3 times [2024-06-27 20:14:07,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:07,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135544457] [2024-06-27 20:14:07,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:07,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:07,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:08,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:08,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:08,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135544457] [2024-06-27 20:14:08,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135544457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:08,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:08,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:14:08,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970019595] [2024-06-27 20:14:08,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:08,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:14:08,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:08,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:14:08,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:14:08,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:14:08,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 565 transitions, 8880 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 20:14:08,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:08,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:14:08,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:10,612 INFO L124 PetriNetUnfolderBase]: 5893/8985 cut-off events. [2024-06-27 20:14:10,612 INFO L125 PetriNetUnfolderBase]: For 1220744/1220753 co-relation queries the response was YES. [2024-06-27 20:14:10,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91484 conditions, 8985 events. 5893/8985 cut-off events. For 1220744/1220753 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 53420 event pairs, 1644 based on Foata normal form. 15/8997 useless extension candidates. Maximal degree in co-relation 91321. Up to 8592 conditions per place. [2024-06-27 20:14:10,746 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 495 selfloop transitions, 97 changer transitions 0/595 dead transitions. [2024-06-27 20:14:10,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 595 transitions, 10576 flow [2024-06-27 20:14:10,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:14:10,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:14:10,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 20:14:10,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-27 20:14:10,749 INFO L175 Difference]: Start difference. First operand has 334 places, 565 transitions, 8880 flow. Second operand 7 states and 130 transitions. [2024-06-27 20:14:10,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 595 transitions, 10576 flow [2024-06-27 20:14:13,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 595 transitions, 10411 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 20:14:13,217 INFO L231 Difference]: Finished difference. Result has 336 places, 568 transitions, 8988 flow [2024-06-27 20:14:13,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8719, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8988, PETRI_PLACES=336, PETRI_TRANSITIONS=568} [2024-06-27 20:14:13,217 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 294 predicate places. [2024-06-27 20:14:13,217 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 568 transitions, 8988 flow [2024-06-27 20:14:13,218 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 20:14:13,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:13,218 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 20:14:13,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 20:14:13,218 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 20:14:13,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:13,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1440705183, now seen corresponding path program 4 times [2024-06-27 20:14:13,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:13,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48443694] [2024-06-27 20:14:13,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:13,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:13,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:13,726 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 20:14:13,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:13,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48443694] [2024-06-27 20:14:13,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48443694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:13,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:13,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:14:13,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478606808] [2024-06-27 20:14:13,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:13,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:14:13,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:13,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:14:13,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:14:13,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:14:13,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 568 transitions, 8988 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 20:14:13,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:13,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:14:13,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:15,758 INFO L124 PetriNetUnfolderBase]: 5922/9021 cut-off events. [2024-06-27 20:14:15,759 INFO L125 PetriNetUnfolderBase]: For 1214952/1214961 co-relation queries the response was YES. [2024-06-27 20:14:15,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92420 conditions, 9021 events. 5922/9021 cut-off events. For 1214952/1214961 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 53529 event pairs, 1615 based on Foata normal form. 9/9027 useless extension candidates. Maximal degree in co-relation 92256. Up to 8617 conditions per place. [2024-06-27 20:14:15,909 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 481 selfloop transitions, 114 changer transitions 0/598 dead transitions. [2024-06-27 20:14:15,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 598 transitions, 10799 flow [2024-06-27 20:14:15,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:14:15,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:14:15,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 20:14:15,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355400696864111 [2024-06-27 20:14:15,910 INFO L175 Difference]: Start difference. First operand has 336 places, 568 transitions, 8988 flow. Second operand 7 states and 125 transitions. [2024-06-27 20:14:15,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 598 transitions, 10799 flow [2024-06-27 20:14:18,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 598 transitions, 10620 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 20:14:18,591 INFO L231 Difference]: Finished difference. Result has 340 places, 578 transitions, 9312 flow [2024-06-27 20:14:18,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8829, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9312, PETRI_PLACES=340, PETRI_TRANSITIONS=578} [2024-06-27 20:14:18,591 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-27 20:14:18,591 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 578 transitions, 9312 flow [2024-06-27 20:14:18,592 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 20:14:18,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:18,592 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 20:14:18,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 20:14:18,593 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:14:18,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:18,593 INFO L85 PathProgramCache]: Analyzing trace with hash -2139350535, now seen corresponding path program 2 times [2024-06-27 20:14:18,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:18,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442147944] [2024-06-27 20:14:18,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:18,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:18,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:19,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:19,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:19,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442147944] [2024-06-27 20:14:19,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442147944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:19,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:19,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:14:19,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898857889] [2024-06-27 20:14:19,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:19,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:14:19,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:19,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:14:19,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:14:19,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:14:19,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 578 transitions, 9312 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:19,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:19,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:14:19,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:22,012 INFO L124 PetriNetUnfolderBase]: 5990/9136 cut-off events. [2024-06-27 20:14:22,012 INFO L125 PetriNetUnfolderBase]: For 1292193/1292208 co-relation queries the response was YES. [2024-06-27 20:14:22,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94233 conditions, 9136 events. 5990/9136 cut-off events. For 1292193/1292208 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 54483 event pairs, 1397 based on Foata normal form. 32/9165 useless extension candidates. Maximal degree in co-relation 94067. Up to 7525 conditions per place. [2024-06-27 20:14:22,157 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 398 selfloop transitions, 228 changer transitions 0/629 dead transitions. [2024-06-27 20:14:22,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 629 transitions, 11327 flow [2024-06-27 20:14:22,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:14:22,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:14:22,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-27 20:14:22,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560975609756098 [2024-06-27 20:14:22,159 INFO L175 Difference]: Start difference. First operand has 340 places, 578 transitions, 9312 flow. Second operand 10 states and 187 transitions. [2024-06-27 20:14:22,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 629 transitions, 11327 flow [2024-06-27 20:14:24,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 629 transitions, 11184 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 20:14:24,877 INFO L231 Difference]: Finished difference. Result has 345 places, 580 transitions, 9819 flow [2024-06-27 20:14:24,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9173, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9819, PETRI_PLACES=345, PETRI_TRANSITIONS=580} [2024-06-27 20:14:24,879 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 303 predicate places. [2024-06-27 20:14:24,879 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 580 transitions, 9819 flow [2024-06-27 20:14:24,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:24,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:24,880 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 20:14:24,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 20:14:24,880 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 20:14:24,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:24,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1440709151, now seen corresponding path program 6 times [2024-06-27 20:14:24,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:24,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341218767] [2024-06-27 20:14:24,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:24,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:24,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:25,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:25,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:25,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341218767] [2024-06-27 20:14:25,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341218767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:25,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:25,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:14:25,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027588395] [2024-06-27 20:14:25,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:25,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:14:25,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:25,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:14:25,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:14:25,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:14:25,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 580 transitions, 9819 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 20:14:25,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:25,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:14:25,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:28,236 INFO L124 PetriNetUnfolderBase]: 5995/9143 cut-off events. [2024-06-27 20:14:28,236 INFO L125 PetriNetUnfolderBase]: For 1250655/1250667 co-relation queries the response was YES. [2024-06-27 20:14:28,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95338 conditions, 9143 events. 5995/9143 cut-off events. For 1250655/1250667 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 54528 event pairs, 1659 based on Foata normal form. 13/9155 useless extension candidates. Maximal degree in co-relation 95173. Up to 9004 conditions per place. [2024-06-27 20:14:28,367 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 536 selfloop transitions, 59 changer transitions 0/598 dead transitions. [2024-06-27 20:14:28,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 598 transitions, 11124 flow [2024-06-27 20:14:28,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:14:28,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:14:28,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 20:14:28,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-27 20:14:28,369 INFO L175 Difference]: Start difference. First operand has 345 places, 580 transitions, 9819 flow. Second operand 8 states and 129 transitions. [2024-06-27 20:14:28,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 598 transitions, 11124 flow [2024-06-27 20:14:31,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 598 transitions, 10518 flow, removed 78 selfloop flow, removed 8 redundant places. [2024-06-27 20:14:31,072 INFO L231 Difference]: Finished difference. Result has 345 places, 583 transitions, 9408 flow [2024-06-27 20:14:31,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9213, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9408, PETRI_PLACES=345, PETRI_TRANSITIONS=583} [2024-06-27 20:14:31,073 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 303 predicate places. [2024-06-27 20:14:31,073 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 583 transitions, 9408 flow [2024-06-27 20:14:31,073 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 20:14:31,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:31,074 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 20:14:31,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 20:14:31,074 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 20:14:31,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:31,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1852020383, now seen corresponding path program 5 times [2024-06-27 20:14:31,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:31,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052519329] [2024-06-27 20:14:31,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:31,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:31,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:31,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:31,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:31,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052519329] [2024-06-27 20:14:31,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052519329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:31,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:31,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:14:31,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756541958] [2024-06-27 20:14:31,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:31,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:14:31,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:31,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:14:31,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:14:31,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:14:31,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 583 transitions, 9408 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 20:14:31,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:31,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:14:31,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:34,120 INFO L124 PetriNetUnfolderBase]: 5966/9111 cut-off events. [2024-06-27 20:14:34,120 INFO L125 PetriNetUnfolderBase]: For 1216637/1216637 co-relation queries the response was YES. [2024-06-27 20:14:34,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92066 conditions, 9111 events. 5966/9111 cut-off events. For 1216637/1216637 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 54369 event pairs, 2134 based on Foata normal form. 7/9117 useless extension candidates. Maximal degree in co-relation 91900. Up to 8881 conditions per place. [2024-06-27 20:14:34,247 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 542 selfloop transitions, 59 changer transitions 0/604 dead transitions. [2024-06-27 20:14:34,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 604 transitions, 10874 flow [2024-06-27 20:14:34,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:14:34,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:14:34,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 20:14:34,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-27 20:14:34,248 INFO L175 Difference]: Start difference. First operand has 345 places, 583 transitions, 9408 flow. Second operand 7 states and 122 transitions. [2024-06-27 20:14:34,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 604 transitions, 10874 flow [2024-06-27 20:14:36,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 604 transitions, 10704 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 20:14:36,891 INFO L231 Difference]: Finished difference. Result has 346 places, 583 transitions, 9378 flow [2024-06-27 20:14:36,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9240, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9378, PETRI_PLACES=346, PETRI_TRANSITIONS=583} [2024-06-27 20:14:36,892 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 304 predicate places. [2024-06-27 20:14:36,892 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 583 transitions, 9378 flow [2024-06-27 20:14:36,892 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 20:14:36,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:36,892 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 20:14:36,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 20:14:36,892 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 20:14:36,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:36,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1852406333, now seen corresponding path program 6 times [2024-06-27 20:14:36,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:36,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489653055] [2024-06-27 20:14:36,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:36,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:36,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:37,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:37,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:37,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489653055] [2024-06-27 20:14:37,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489653055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:37,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:37,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:14:37,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927096911] [2024-06-27 20:14:37,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:37,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:14:37,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:37,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:14:37,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:14:37,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:14:37,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 583 transitions, 9378 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 20:14:37,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:37,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:14:37,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:39,964 INFO L124 PetriNetUnfolderBase]: 5965/9108 cut-off events. [2024-06-27 20:14:39,964 INFO L125 PetriNetUnfolderBase]: For 1197632/1197632 co-relation queries the response was YES. [2024-06-27 20:14:40,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91956 conditions, 9108 events. 5965/9108 cut-off events. For 1197632/1197632 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 54400 event pairs, 2158 based on Foata normal form. 3/9110 useless extension candidates. Maximal degree in co-relation 91790. Up to 9011 conditions per place. [2024-06-27 20:14:40,099 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 570 selfloop transitions, 26 changer transitions 0/599 dead transitions. [2024-06-27 20:14:40,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 599 transitions, 10691 flow [2024-06-27 20:14:40,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:14:40,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:14:40,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 20:14:40,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-27 20:14:40,100 INFO L175 Difference]: Start difference. First operand has 346 places, 583 transitions, 9378 flow. Second operand 7 states and 116 transitions. [2024-06-27 20:14:40,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 599 transitions, 10691 flow [2024-06-27 20:14:42,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 599 transitions, 10625 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 20:14:42,316 INFO L231 Difference]: Finished difference. Result has 349 places, 586 transitions, 9449 flow [2024-06-27 20:14:42,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9314, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9449, PETRI_PLACES=349, PETRI_TRANSITIONS=586} [2024-06-27 20:14:42,316 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 307 predicate places. [2024-06-27 20:14:42,316 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 586 transitions, 9449 flow [2024-06-27 20:14:42,317 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 20:14:42,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:42,317 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 20:14:42,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 20:14:42,317 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:14:42,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:42,317 INFO L85 PathProgramCache]: Analyzing trace with hash 520237163, now seen corresponding path program 3 times [2024-06-27 20:14:42,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:42,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331091060] [2024-06-27 20:14:42,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:42,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:42,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:43,649 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 20:14:43,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:43,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331091060] [2024-06-27 20:14:43,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331091060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:43,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:43,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:14:43,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613707134] [2024-06-27 20:14:43,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:43,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:14:43,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:43,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:14:43,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:14:43,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:14:43,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 586 transitions, 9449 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:43,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:43,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:14:43,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:46,551 INFO L124 PetriNetUnfolderBase]: 6033/9221 cut-off events. [2024-06-27 20:14:46,552 INFO L125 PetriNetUnfolderBase]: For 1286939/1286939 co-relation queries the response was YES. [2024-06-27 20:14:46,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93752 conditions, 9221 events. 6033/9221 cut-off events. For 1286939/1286939 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 55253 event pairs, 2105 based on Foata normal form. 18/9238 useless extension candidates. Maximal degree in co-relation 93585. Up to 8631 conditions per place. [2024-06-27 20:14:46,690 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 544 selfloop transitions, 83 changer transitions 0/630 dead transitions. [2024-06-27 20:14:46,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 630 transitions, 11259 flow [2024-06-27 20:14:46,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:14:46,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:14:46,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-27 20:14:46,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43414634146341463 [2024-06-27 20:14:46,691 INFO L175 Difference]: Start difference. First operand has 349 places, 586 transitions, 9449 flow. Second operand 10 states and 178 transitions. [2024-06-27 20:14:46,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 630 transitions, 11259 flow [2024-06-27 20:14:48,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 630 transitions, 11182 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 20:14:48,876 INFO L231 Difference]: Finished difference. Result has 354 places, 588 transitions, 9720 flow [2024-06-27 20:14:48,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9372, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9720, PETRI_PLACES=354, PETRI_TRANSITIONS=588} [2024-06-27 20:14:48,877 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 312 predicate places. [2024-06-27 20:14:48,877 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 588 transitions, 9720 flow [2024-06-27 20:14:48,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:48,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:48,877 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 20:14:48,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 20:14:48,878 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:14:48,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:48,878 INFO L85 PathProgramCache]: Analyzing trace with hash 496396967, now seen corresponding path program 4 times [2024-06-27 20:14:48,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:48,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948744016] [2024-06-27 20:14:48,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:48,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:48,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:50,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:50,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:50,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948744016] [2024-06-27 20:14:50,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948744016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:50,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:50,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:14:50,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317348025] [2024-06-27 20:14:50,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:50,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:14:50,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:50,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:14:50,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:14:50,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:14:50,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 588 transitions, 9720 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:50,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:50,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:14:50,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:52,990 INFO L124 PetriNetUnfolderBase]: 6144/9408 cut-off events. [2024-06-27 20:14:52,991 INFO L125 PetriNetUnfolderBase]: For 1344186/1344186 co-relation queries the response was YES. [2024-06-27 20:14:53,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96197 conditions, 9408 events. 6144/9408 cut-off events. For 1344186/1344186 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 56774 event pairs, 2159 based on Foata normal form. 18/9425 useless extension candidates. Maximal degree in co-relation 96029. Up to 9056 conditions per place. [2024-06-27 20:14:53,124 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 587 selfloop transitions, 45 changer transitions 0/635 dead transitions. [2024-06-27 20:14:53,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 635 transitions, 11379 flow [2024-06-27 20:14:53,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:14:53,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:14:53,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-27 20:14:53,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424390243902439 [2024-06-27 20:14:53,126 INFO L175 Difference]: Start difference. First operand has 354 places, 588 transitions, 9720 flow. Second operand 10 states and 174 transitions. [2024-06-27 20:14:53,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 635 transitions, 11379 flow [2024-06-27 20:14:55,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 635 transitions, 11070 flow, removed 73 selfloop flow, removed 8 redundant places. [2024-06-27 20:14:55,778 INFO L231 Difference]: Finished difference. Result has 358 places, 597 transitions, 9749 flow [2024-06-27 20:14:55,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9411, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9749, PETRI_PLACES=358, PETRI_TRANSITIONS=597} [2024-06-27 20:14:55,778 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 316 predicate places. [2024-06-27 20:14:55,779 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 597 transitions, 9749 flow [2024-06-27 20:14:55,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:55,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:55,779 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 20:14:55,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 20:14:55,779 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:14:55,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:55,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1821400359, now seen corresponding path program 5 times [2024-06-27 20:14:55,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:55,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889649408] [2024-06-27 20:14:55,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:55,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:55,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:56,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:56,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:56,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889649408] [2024-06-27 20:14:56,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889649408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:56,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:56,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:14:56,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298021109] [2024-06-27 20:14:56,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:56,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:14:56,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:56,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:14:56,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:14:57,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:14:57,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 597 transitions, 9749 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:57,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:57,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:14:57,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:59,792 INFO L124 PetriNetUnfolderBase]: 6205/9508 cut-off events. [2024-06-27 20:14:59,792 INFO L125 PetriNetUnfolderBase]: For 1373844/1373844 co-relation queries the response was YES. [2024-06-27 20:14:59,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96978 conditions, 9508 events. 6205/9508 cut-off events. For 1373844/1373844 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 57478 event pairs, 2174 based on Foata normal form. 18/9525 useless extension candidates. Maximal degree in co-relation 96807. Up to 9224 conditions per place. [2024-06-27 20:14:59,950 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 595 selfloop transitions, 37 changer transitions 0/635 dead transitions. [2024-06-27 20:14:59,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 635 transitions, 11359 flow [2024-06-27 20:14:59,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:14:59,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:14:59,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-27 20:14:59,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219512195121951 [2024-06-27 20:14:59,952 INFO L175 Difference]: Start difference. First operand has 358 places, 597 transitions, 9749 flow. Second operand 10 states and 173 transitions. [2024-06-27 20:14:59,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 635 transitions, 11359 flow [2024-06-27 20:15:02,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 635 transitions, 11133 flow, removed 77 selfloop flow, removed 6 redundant places. [2024-06-27 20:15:02,979 INFO L231 Difference]: Finished difference. Result has 362 places, 599 transitions, 9790 flow [2024-06-27 20:15:02,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9523, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9790, PETRI_PLACES=362, PETRI_TRANSITIONS=599} [2024-06-27 20:15:02,979 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-27 20:15:02,979 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 599 transitions, 9790 flow [2024-06-27 20:15:02,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:02,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:02,980 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 20:15:02,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 20:15:02,981 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:15:02,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:02,982 INFO L85 PathProgramCache]: Analyzing trace with hash 526723913, now seen corresponding path program 6 times [2024-06-27 20:15:02,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:02,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327316732] [2024-06-27 20:15:02,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:02,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:02,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:04,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:04,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:04,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327316732] [2024-06-27 20:15:04,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327316732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:04,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:04,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:15:04,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005491011] [2024-06-27 20:15:04,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:04,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:15:04,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:04,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:15:04,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:15:04,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:15:04,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 599 transitions, 9790 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:04,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:04,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:15:04,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:07,057 INFO L124 PetriNetUnfolderBase]: 6273/9621 cut-off events. [2024-06-27 20:15:07,058 INFO L125 PetriNetUnfolderBase]: For 1409445/1409445 co-relation queries the response was YES. [2024-06-27 20:15:07,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98169 conditions, 9621 events. 6273/9621 cut-off events. For 1409445/1409445 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 58531 event pairs, 2149 based on Foata normal form. 18/9638 useless extension candidates. Maximal degree in co-relation 97997. Up to 8931 conditions per place. [2024-06-27 20:15:07,202 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 551 selfloop transitions, 89 changer transitions 0/643 dead transitions. [2024-06-27 20:15:07,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 643 transitions, 11642 flow [2024-06-27 20:15:07,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:15:07,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:15:07,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-27 20:15:07,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43414634146341463 [2024-06-27 20:15:07,203 INFO L175 Difference]: Start difference. First operand has 362 places, 599 transitions, 9790 flow. Second operand 10 states and 178 transitions. [2024-06-27 20:15:07,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 643 transitions, 11642 flow [2024-06-27 20:15:10,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 643 transitions, 11413 flow, removed 79 selfloop flow, removed 8 redundant places. [2024-06-27 20:15:10,470 INFO L231 Difference]: Finished difference. Result has 364 places, 601 transitions, 9936 flow [2024-06-27 20:15:10,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9561, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9936, PETRI_PLACES=364, PETRI_TRANSITIONS=601} [2024-06-27 20:15:10,470 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 322 predicate places. [2024-06-27 20:15:10,471 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 601 transitions, 9936 flow [2024-06-27 20:15:10,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:10,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:10,471 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 20:15:10,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 20:15:10,471 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:15:10,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:10,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1649378577, now seen corresponding path program 7 times [2024-06-27 20:15:10,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:10,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031662076] [2024-06-27 20:15:10,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:10,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:10,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:11,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:11,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:11,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031662076] [2024-06-27 20:15:11,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031662076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:11,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:11,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:15:11,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718145137] [2024-06-27 20:15:11,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:11,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:15:11,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:11,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:15:11,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:15:11,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:15:11,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 601 transitions, 9936 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:11,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:11,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:15:11,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:14,402 INFO L124 PetriNetUnfolderBase]: 6280/9635 cut-off events. [2024-06-27 20:15:14,402 INFO L125 PetriNetUnfolderBase]: For 1385348/1385348 co-relation queries the response was YES. [2024-06-27 20:15:14,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97235 conditions, 9635 events. 6280/9635 cut-off events. For 1385348/1385348 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 58563 event pairs, 2167 based on Foata normal form. 18/9652 useless extension candidates. Maximal degree in co-relation 97062. Up to 8971 conditions per place. [2024-06-27 20:15:14,550 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 531 selfloop transitions, 110 changer transitions 0/644 dead transitions. [2024-06-27 20:15:14,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 644 transitions, 11950 flow [2024-06-27 20:15:14,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:15:14,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:15:14,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-27 20:15:14,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43658536585365854 [2024-06-27 20:15:14,551 INFO L175 Difference]: Start difference. First operand has 364 places, 601 transitions, 9936 flow. Second operand 10 states and 179 transitions. [2024-06-27 20:15:14,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 644 transitions, 11950 flow [2024-06-27 20:15:17,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 644 transitions, 11613 flow, removed 81 selfloop flow, removed 8 redundant places. [2024-06-27 20:15:17,775 INFO L231 Difference]: Finished difference. Result has 366 places, 603 transitions, 10011 flow [2024-06-27 20:15:17,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9599, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10011, PETRI_PLACES=366, PETRI_TRANSITIONS=603} [2024-06-27 20:15:17,776 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 324 predicate places. [2024-06-27 20:15:17,776 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 603 transitions, 10011 flow [2024-06-27 20:15:17,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:17,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:17,776 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 20:15:17,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 20:15:17,777 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:15:17,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:17,777 INFO L85 PathProgramCache]: Analyzing trace with hash -142021815, now seen corresponding path program 8 times [2024-06-27 20:15:17,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:17,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369552321] [2024-06-27 20:15:17,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:17,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:17,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:19,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:19,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:19,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369552321] [2024-06-27 20:15:19,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369552321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:19,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:19,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:15:19,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63076845] [2024-06-27 20:15:19,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:19,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:15:19,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:19,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:15:19,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:15:19,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:15:19,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 603 transitions, 10011 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:19,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:19,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:15:19,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:22,007 INFO L124 PetriNetUnfolderBase]: 6341/9744 cut-off events. [2024-06-27 20:15:22,007 INFO L125 PetriNetUnfolderBase]: For 1415983/1415983 co-relation queries the response was YES. [2024-06-27 20:15:22,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98105 conditions, 9744 events. 6341/9744 cut-off events. For 1415983/1415983 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 59535 event pairs, 2181 based on Foata normal form. 18/9761 useless extension candidates. Maximal degree in co-relation 97931. Up to 9165 conditions per place. [2024-06-27 20:15:22,155 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 569 selfloop transitions, 71 changer transitions 0/643 dead transitions. [2024-06-27 20:15:22,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 643 transitions, 11670 flow [2024-06-27 20:15:22,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:15:22,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:15:22,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-27 20:15:22,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292682926829268 [2024-06-27 20:15:22,157 INFO L175 Difference]: Start difference. First operand has 366 places, 603 transitions, 10011 flow. Second operand 10 states and 176 transitions. [2024-06-27 20:15:22,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 643 transitions, 11670 flow [2024-06-27 20:15:25,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 643 transitions, 11297 flow, removed 78 selfloop flow, removed 8 redundant places. [2024-06-27 20:15:25,491 INFO L231 Difference]: Finished difference. Result has 368 places, 605 transitions, 9986 flow [2024-06-27 20:15:25,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9638, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9986, PETRI_PLACES=368, PETRI_TRANSITIONS=605} [2024-06-27 20:15:25,491 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-27 20:15:25,492 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 605 transitions, 9986 flow [2024-06-27 20:15:25,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:25,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:25,492 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 20:15:25,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 20:15:25,492 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:15:25,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:25,493 INFO L85 PathProgramCache]: Analyzing trace with hash -142258965, now seen corresponding path program 9 times [2024-06-27 20:15:25,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:25,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925982130] [2024-06-27 20:15:25,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:25,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:25,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:26,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:26,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:26,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925982130] [2024-06-27 20:15:26,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925982130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:26,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:26,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:15:26,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115692503] [2024-06-27 20:15:26,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:26,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:15:26,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:26,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:15:26,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:15:26,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:15:26,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 605 transitions, 9986 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:26,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:26,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:15:26,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:29,753 INFO L124 PetriNetUnfolderBase]: 6463/9948 cut-off events. [2024-06-27 20:15:29,754 INFO L125 PetriNetUnfolderBase]: For 1471666/1471666 co-relation queries the response was YES. [2024-06-27 20:15:29,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99126 conditions, 9948 events. 6463/9948 cut-off events. For 1471666/1471666 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 61224 event pairs, 2237 based on Foata normal form. 24/9971 useless extension candidates. Maximal degree in co-relation 98951. Up to 9392 conditions per place. [2024-06-27 20:15:29,899 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 581 selfloop transitions, 65 changer transitions 0/649 dead transitions. [2024-06-27 20:15:29,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 649 transitions, 11745 flow [2024-06-27 20:15:29,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:15:29,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:15:29,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-27 20:15:29,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43414634146341463 [2024-06-27 20:15:29,900 INFO L175 Difference]: Start difference. First operand has 368 places, 605 transitions, 9986 flow. Second operand 10 states and 178 transitions. [2024-06-27 20:15:29,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 649 transitions, 11745 flow [2024-06-27 20:15:33,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 649 transitions, 11429 flow, removed 90 selfloop flow, removed 8 redundant places. [2024-06-27 20:15:33,033 INFO L231 Difference]: Finished difference. Result has 370 places, 609 transitions, 10061 flow [2024-06-27 20:15:33,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9674, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10061, PETRI_PLACES=370, PETRI_TRANSITIONS=609} [2024-06-27 20:15:33,033 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 328 predicate places. [2024-06-27 20:15:33,033 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 609 transitions, 10061 flow [2024-06-27 20:15:33,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:33,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:33,034 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 20:15:33,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 20:15:33,034 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:15:33,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:33,034 INFO L85 PathProgramCache]: Analyzing trace with hash -142252455, now seen corresponding path program 10 times [2024-06-27 20:15:33,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:33,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230530688] [2024-06-27 20:15:33,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:33,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:33,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:34,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:34,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:34,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230530688] [2024-06-27 20:15:34,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230530688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:34,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:34,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:15:34,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60648295] [2024-06-27 20:15:34,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:34,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:15:34,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:34,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:15:34,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:15:34,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:15:34,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 609 transitions, 10061 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:34,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:34,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:15:34,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:37,359 INFO L124 PetriNetUnfolderBase]: 6463/9948 cut-off events. [2024-06-27 20:15:37,360 INFO L125 PetriNetUnfolderBase]: For 1378462/1378462 co-relation queries the response was YES.