./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe004_power.opt_pso.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe004_power.opt_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe004_power.opt_pso.opt_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe004_power.opt_pso.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 17:21:11,692 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 17:21:11,753 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 17:21:11,758 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 17:21:11,759 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 17:21:11,781 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 17:21:11,782 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 17:21:11,782 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 17:21:11,782 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 17:21:11,785 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 17:21:11,786 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 17:21:11,786 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 17:21:11,787 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 17:21:11,787 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 17:21:11,788 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 17:21:11,788 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 17:21:11,788 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 17:21:11,788 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 17:21:11,788 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 17:21:11,789 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 17:21:11,789 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 17:21:11,789 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 17:21:11,789 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 17:21:11,790 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 17:21:11,790 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 17:21:11,790 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 17:21:11,790 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 17:21:11,790 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 17:21:11,791 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 17:21:11,791 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 17:21:11,792 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 17:21:11,792 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 17:21:11,792 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:21:11,792 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 17:21:11,792 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 17:21:11,792 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 17:21:11,793 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 17:21:11,793 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 17:21:11,793 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 17:21:11,793 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 17:21:11,793 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 17:21:11,793 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 17:21:11,794 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 17:21:11,794 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 17:21:12,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 17:21:12,063 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 17:21:12,065 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 17:21:12,066 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 17:21:12,066 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 17:21:12,067 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe004_power.opt_pso.opt_rmo.opt.yml/witness.yml [2024-06-21 17:21:12,199 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 17:21:12,199 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 17:21:12,204 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe004_power.opt_pso.opt_rmo.opt.i [2024-06-21 17:21:13,137 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 17:21:13,334 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 17:21:13,335 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe004_power.opt_pso.opt_rmo.opt.i [2024-06-21 17:21:13,357 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13ee34fa7/1a4fd4935a1c4d5fafe16e13542fedd8/FLAG047821fbb [2024-06-21 17:21:13,371 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13ee34fa7/1a4fd4935a1c4d5fafe16e13542fedd8 [2024-06-21 17:21:13,372 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 17:21:13,377 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 17:21:13,378 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 17:21:13,378 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 17:21:13,387 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 17:21:13,388 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:21:12" (1/2) ... [2024-06-21 17:21:13,388 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8c0948a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:21:13, skipping insertion in model container [2024-06-21 17:21:13,389 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:21:12" (1/2) ... [2024-06-21 17:21:13,390 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5bcfb9ce and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:21:13, skipping insertion in model container [2024-06-21 17:21:13,390 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:21:13" (2/2) ... [2024-06-21 17:21:13,390 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8c0948a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:21:13, skipping insertion in model container [2024-06-21 17:21:13,390 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:21:13" (2/2) ... [2024-06-21 17:21:13,390 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 17:21:13,459 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 17:21:13,460 INFO L97 edCorrectnessWitness]: Location invariant before [L824-L824] ((((((((((((((((! multithreaded || x$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-21 17:21:13,461 INFO L97 edCorrectnessWitness]: Location invariant before [L823-L823] ((((((((((((((((! multithreaded || x$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-21 17:21:13,461 INFO L97 edCorrectnessWitness]: Location invariant before [L821-L821] ((((((((((((((((! multithreaded || x$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-21 17:21:13,461 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 17:21:13,461 INFO L106 edCorrectnessWitness]: ghost_update [L819-L819] multithreaded = 1; [2024-06-21 17:21:13,502 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 17:21:13,829 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:21:13,837 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 17:21:13,944 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:21:13,995 INFO L206 MainTranslator]: Completed translation [2024-06-21 17:21:13,995 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:21:13 WrapperNode [2024-06-21 17:21:13,995 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 17:21:13,996 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 17:21:13,996 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 17:21:13,996 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 17:21:14,003 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:21:13" (1/1) ... [2024-06-21 17:21:14,014 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:21:13" (1/1) ... [2024-06-21 17:21:14,045 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 143 [2024-06-21 17:21:14,045 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 17:21:14,046 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 17:21:14,046 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 17:21:14,046 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 17:21:14,054 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:21:13" (1/1) ... [2024-06-21 17:21:14,054 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:21:13" (1/1) ... [2024-06-21 17:21:14,057 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:21:13" (1/1) ... [2024-06-21 17:21:14,069 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 17:21:14,069 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:21:13" (1/1) ... [2024-06-21 17:21:14,070 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:21:13" (1/1) ... [2024-06-21 17:21:14,095 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:21:13" (1/1) ... [2024-06-21 17:21:14,097 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:21:13" (1/1) ... [2024-06-21 17:21:14,098 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:21:13" (1/1) ... [2024-06-21 17:21:14,099 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:21:13" (1/1) ... [2024-06-21 17:21:14,101 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 17:21:14,102 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 17:21:14,102 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 17:21:14,102 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 17:21:14,103 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:21:13" (1/1) ... [2024-06-21 17:21:14,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:21:14,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 17:21:14,137 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 17:21:14,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 17:21:14,220 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 17:21:14,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 17:21:14,221 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 17:21:14,221 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 17:21:14,221 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 17:21:14,221 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 17:21:14,222 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 17:21:14,222 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 17:21:14,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 17:21:14,222 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 17:21:14,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 17:21:14,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 17:21:14,223 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 17:21:14,345 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 17:21:14,347 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 17:21:14,641 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 17:21:14,644 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 17:21:14,777 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 17:21:14,777 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 17:21:14,778 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:21:14 BoogieIcfgContainer [2024-06-21 17:21:14,778 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 17:21:14,780 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 17:21:14,780 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 17:21:14,782 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 17:21:14,783 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:21:12" (1/4) ... [2024-06-21 17:21:14,783 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25f3aa66 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:21:14, skipping insertion in model container [2024-06-21 17:21:14,783 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 05:21:13" (2/4) ... [2024-06-21 17:21:14,783 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25f3aa66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:21:14, skipping insertion in model container [2024-06-21 17:21:14,784 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:21:13" (3/4) ... [2024-06-21 17:21:14,784 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25f3aa66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:21:14, skipping insertion in model container [2024-06-21 17:21:14,784 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:21:14" (4/4) ... [2024-06-21 17:21:14,785 INFO L112 eAbstractionObserver]: Analyzing ICFG safe004_power.opt_pso.opt_rmo.opt.i [2024-06-21 17:21:14,812 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 17:21:14,812 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 17:21:14,812 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 17:21:14,856 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 17:21:14,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 17:21:14,917 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-21 17:21:14,917 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:21:14,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 17:21:14,919 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 17:21:14,922 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-21 17:21:14,934 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 17:21:14,940 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;@65b9229, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 17:21:14,940 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 17:21:14,943 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 17:21:14,943 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 17:21:14,943 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:21:14,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:14,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 17:21:14,944 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:14,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:14,948 INFO L85 PathProgramCache]: Analyzing trace with hash 368623954, now seen corresponding path program 1 times [2024-06-21 17:21:14,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:14,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274142931] [2024-06-21 17:21:14,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:14,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:15,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:15,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:15,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:15,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274142931] [2024-06-21 17:21:15,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274142931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:15,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:15,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 17:21:15,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675255085] [2024-06-21 17:21:15,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:15,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 17:21:15,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:15,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 17:21:15,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 17:21:15,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-21 17:21:15,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:15,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:15,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-21 17:21:15,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:16,089 INFO L124 PetriNetUnfolderBase]: 1152/1755 cut-off events. [2024-06-21 17:21:16,090 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-21 17:21:16,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3595 conditions, 1755 events. 1152/1755 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8184 event pairs, 794 based on Foata normal form. 2/1710 useless extension candidates. Maximal degree in co-relation 3583. Up to 1738 conditions per place. [2024-06-21 17:21:16,102 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 32 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-21 17:21:16,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 42 transitions, 171 flow [2024-06-21 17:21:16,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 17:21:16,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 17:21:16,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-21 17:21:16,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 17:21:16,114 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 72 transitions. [2024-06-21 17:21:16,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 42 transitions, 171 flow [2024-06-21 17:21:16,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 42 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 17:21:16,118 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-21 17:21:16,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-21 17:21:16,122 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-21 17:21:16,122 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-21 17:21:16,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:16,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:16,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:16,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 17:21:16,123 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:16,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:16,124 INFO L85 PathProgramCache]: Analyzing trace with hash 2060553313, now seen corresponding path program 1 times [2024-06-21 17:21:16,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:16,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663579489] [2024-06-21 17:21:16,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:16,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:16,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:16,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:16,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:16,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663579489] [2024-06-21 17:21:16,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663579489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:16,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:16,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 17:21:16,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669067427] [2024-06-21 17:21:16,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:16,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 17:21:16,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:16,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 17:21:16,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 17:21:16,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:21:16,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:16,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:16,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:21:16,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:16,935 INFO L124 PetriNetUnfolderBase]: 1644/2456 cut-off events. [2024-06-21 17:21:16,936 INFO L125 PetriNetUnfolderBase]: For 375/375 co-relation queries the response was YES. [2024-06-21 17:21:16,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5637 conditions, 2456 events. 1644/2456 cut-off events. For 375/375 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11062 event pairs, 1035 based on Foata normal form. 3/2457 useless extension candidates. Maximal degree in co-relation 5625. Up to 2429 conditions per place. [2024-06-21 17:21:16,947 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 43 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-21 17:21:16,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 54 transitions, 254 flow [2024-06-21 17:21:16,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 17:21:16,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 17:21:16,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2024-06-21 17:21:16,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-21 17:21:16,951 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 86 transitions. [2024-06-21 17:21:16,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 54 transitions, 254 flow [2024-06-21 17:21:16,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 54 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 17:21:16,954 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 150 flow [2024-06-21 17:21:16,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-06-21 17:21:16,955 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2024-06-21 17:21:16,955 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 150 flow [2024-06-21 17:21:16,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:16,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:16,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:16,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 17:21:16,958 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)] === [2024-06-21 17:21:16,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:16,959 INFO L85 PathProgramCache]: Analyzing trace with hash -547356015, now seen corresponding path program 1 times [2024-06-21 17:21:16,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:16,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104918290] [2024-06-21 17:21:16,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:16,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:16,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:17,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:17,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:17,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104918290] [2024-06-21 17:21:17,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104918290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:17,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:17,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 17:21:17,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407914645] [2024-06-21 17:21:17,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:17,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 17:21:17,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:17,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 17:21:17,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 17:21:17,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:21:17,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 150 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:17,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:17,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:21:17,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:17,637 INFO L124 PetriNetUnfolderBase]: 1632/2438 cut-off events. [2024-06-21 17:21:17,637 INFO L125 PetriNetUnfolderBase]: For 1217/1217 co-relation queries the response was YES. [2024-06-21 17:21:17,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6212 conditions, 2438 events. 1632/2438 cut-off events. For 1217/1217 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10956 event pairs, 743 based on Foata normal form. 6/2442 useless extension candidates. Maximal degree in co-relation 6197. Up to 2381 conditions per place. [2024-06-21 17:21:17,652 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 51 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-21 17:21:17,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 65 transitions, 340 flow [2024-06-21 17:21:17,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:21:17,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:21:17,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-06-21 17:21:17,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53 [2024-06-21 17:21:17,656 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 150 flow. Second operand 5 states and 106 transitions. [2024-06-21 17:21:17,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 65 transitions, 340 flow [2024-06-21 17:21:17,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 65 transitions, 338 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-21 17:21:17,660 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 196 flow [2024-06-21 17:21:17,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=196, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-21 17:21:17,661 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2024-06-21 17:21:17,661 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 196 flow [2024-06-21 17:21:17,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:17,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:17,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:17,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 17:21:17,663 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:17,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:17,663 INFO L85 PathProgramCache]: Analyzing trace with hash -304157824, now seen corresponding path program 1 times [2024-06-21 17:21:17,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:17,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580049107] [2024-06-21 17:21:17,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:17,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:17,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:18,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:18,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:18,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580049107] [2024-06-21 17:21:18,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580049107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:18,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:18,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:21:18,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561306199] [2024-06-21 17:21:18,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:18,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:21:18,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:18,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:21:18,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:21:18,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:21:18,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 196 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:18,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:18,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:21:18,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:18,850 INFO L124 PetriNetUnfolderBase]: 1623/2423 cut-off events. [2024-06-21 17:21:18,851 INFO L125 PetriNetUnfolderBase]: For 2223/2223 co-relation queries the response was YES. [2024-06-21 17:21:18,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6779 conditions, 2423 events. 1623/2423 cut-off events. For 2223/2223 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10845 event pairs, 579 based on Foata normal form. 6/2427 useless extension candidates. Maximal degree in co-relation 6761. Up to 2336 conditions per place. [2024-06-21 17:21:18,864 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 55 selfloop transitions, 12 changer transitions 0/71 dead transitions. [2024-06-21 17:21:18,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 71 transitions, 404 flow [2024-06-21 17:21:18,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:21:18,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:21:18,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-21 17:21:18,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5041666666666667 [2024-06-21 17:21:18,866 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 196 flow. Second operand 6 states and 121 transitions. [2024-06-21 17:21:18,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 71 transitions, 404 flow [2024-06-21 17:21:18,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 71 transitions, 382 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 17:21:18,870 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 215 flow [2024-06-21 17:21:18,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=215, PETRI_PLACES=52, PETRI_TRANSITIONS=44} [2024-06-21 17:21:18,870 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 11 predicate places. [2024-06-21 17:21:18,871 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 215 flow [2024-06-21 17:21:18,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:18,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:18,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:18,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 17:21:18,871 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:18,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:18,872 INFO L85 PathProgramCache]: Analyzing trace with hash -546325912, now seen corresponding path program 1 times [2024-06-21 17:21:18,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:18,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374125013] [2024-06-21 17:21:18,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:18,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:18,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:19,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:19,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:19,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374125013] [2024-06-21 17:21:19,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374125013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:19,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:19,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:21:19,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825831883] [2024-06-21 17:21:19,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:19,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:21:19,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:19,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:21:19,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:21:19,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:21:19,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 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) [2024-06-21 17:21:19,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:19,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:21:19,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:19,578 INFO L124 PetriNetUnfolderBase]: 1245/1943 cut-off events. [2024-06-21 17:21:19,578 INFO L125 PetriNetUnfolderBase]: For 2900/2936 co-relation queries the response was YES. [2024-06-21 17:21:19,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5722 conditions, 1943 events. 1245/1943 cut-off events. For 2900/2936 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 9331 event pairs, 585 based on Foata normal form. 4/1878 useless extension candidates. Maximal degree in co-relation 5702. Up to 1826 conditions per place. [2024-06-21 17:21:19,591 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 43 selfloop transitions, 10 changer transitions 0/62 dead transitions. [2024-06-21 17:21:19,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 62 transitions, 375 flow [2024-06-21 17:21:19,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:21:19,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:21:19,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-21 17:21:19,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 17:21:19,593 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 215 flow. Second operand 5 states and 90 transitions. [2024-06-21 17:21:19,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 62 transitions, 375 flow [2024-06-21 17:21:19,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 62 transitions, 344 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 17:21:19,596 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 255 flow [2024-06-21 17:21:19,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=255, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2024-06-21 17:21:19,597 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 13 predicate places. [2024-06-21 17:21:19,597 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 255 flow [2024-06-21 17:21:19,597 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) [2024-06-21 17:21:19,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:19,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:19,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 17:21:19,598 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:19,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:19,598 INFO L85 PathProgramCache]: Analyzing trace with hash 243767570, now seen corresponding path program 1 times [2024-06-21 17:21:19,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:19,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671170386] [2024-06-21 17:21:19,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:19,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:19,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:20,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:20,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:20,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671170386] [2024-06-21 17:21:20,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671170386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:20,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:20,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:21:20,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389271909] [2024-06-21 17:21:20,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:20,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:21:20,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:20,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:21:20,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:21:20,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:20,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 255 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:20,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:20,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:20,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:20,427 INFO L124 PetriNetUnfolderBase]: 1626/2431 cut-off events. [2024-06-21 17:21:20,428 INFO L125 PetriNetUnfolderBase]: For 4634/4646 co-relation queries the response was YES. [2024-06-21 17:21:20,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7866 conditions, 2431 events. 1626/2431 cut-off events. For 4634/4646 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10946 event pairs, 734 based on Foata normal form. 12/2439 useless extension candidates. Maximal degree in co-relation 7843. Up to 2346 conditions per place. [2024-06-21 17:21:20,442 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 58 selfloop transitions, 16 changer transitions 0/77 dead transitions. [2024-06-21 17:21:20,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 77 transitions, 515 flow [2024-06-21 17:21:20,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:21:20,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:21:20,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-21 17:21:20,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42083333333333334 [2024-06-21 17:21:20,443 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 255 flow. Second operand 6 states and 101 transitions. [2024-06-21 17:21:20,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 77 transitions, 515 flow [2024-06-21 17:21:20,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 77 transitions, 498 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 17:21:20,448 INFO L231 Difference]: Finished difference. Result has 59 places, 59 transitions, 346 flow [2024-06-21 17:21:20,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=346, PETRI_PLACES=59, PETRI_TRANSITIONS=59} [2024-06-21 17:21:20,449 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2024-06-21 17:21:20,449 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 59 transitions, 346 flow [2024-06-21 17:21:20,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:20,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:20,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:20,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 17:21:20,450 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)] === [2024-06-21 17:21:20,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:20,450 INFO L85 PathProgramCache]: Analyzing trace with hash 231276359, now seen corresponding path program 1 times [2024-06-21 17:21:20,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:20,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348727586] [2024-06-21 17:21:20,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:20,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:20,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:20,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:20,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:20,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348727586] [2024-06-21 17:21:20,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348727586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:20,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:20,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:21:20,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330843831] [2024-06-21 17:21:20,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:20,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:21:20,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:20,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:21:20,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:21:20,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:20,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 59 transitions, 346 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:20,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:20,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:20,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:21,283 INFO L124 PetriNetUnfolderBase]: 1649/2465 cut-off events. [2024-06-21 17:21:21,284 INFO L125 PetriNetUnfolderBase]: For 6739/6739 co-relation queries the response was YES. [2024-06-21 17:21:21,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8891 conditions, 2465 events. 1649/2465 cut-off events. For 6739/6739 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11041 event pairs, 758 based on Foata normal form. 2/2465 useless extension candidates. Maximal degree in co-relation 8865. Up to 2422 conditions per place. [2024-06-21 17:21:21,297 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 69 selfloop transitions, 16 changer transitions 0/88 dead transitions. [2024-06-21 17:21:21,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 88 transitions, 626 flow [2024-06-21 17:21:21,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:21:21,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:21:21,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 17:21:21,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-21 17:21:21,299 INFO L175 Difference]: Start difference. First operand has 59 places, 59 transitions, 346 flow. Second operand 7 states and 113 transitions. [2024-06-21 17:21:21,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 88 transitions, 626 flow [2024-06-21 17:21:21,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 88 transitions, 597 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-21 17:21:21,306 INFO L231 Difference]: Finished difference. Result has 65 places, 67 transitions, 427 flow [2024-06-21 17:21:21,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=427, PETRI_PLACES=65, PETRI_TRANSITIONS=67} [2024-06-21 17:21:21,308 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 24 predicate places. [2024-06-21 17:21:21,308 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 67 transitions, 427 flow [2024-06-21 17:21:21,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:21,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:21,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:21,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 17:21:21,308 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:21,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:21,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1038860089, now seen corresponding path program 2 times [2024-06-21 17:21:21,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:21,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327033544] [2024-06-21 17:21:21,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:21,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:21,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:21,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:21,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:21,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327033544] [2024-06-21 17:21:21,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327033544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:21,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:21,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:21:21,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966100319] [2024-06-21 17:21:21,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:21,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:21:21,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:21,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:21:21,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:21:21,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:21,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 67 transitions, 427 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:21,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:21,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:21,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:22,129 INFO L124 PetriNetUnfolderBase]: 1660/2481 cut-off events. [2024-06-21 17:21:22,129 INFO L125 PetriNetUnfolderBase]: For 8271/8271 co-relation queries the response was YES. [2024-06-21 17:21:22,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9213 conditions, 2481 events. 1660/2481 cut-off events. For 8271/8271 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11147 event pairs, 754 based on Foata normal form. 2/2481 useless extension candidates. Maximal degree in co-relation 9184. Up to 2429 conditions per place. [2024-06-21 17:21:22,149 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 67 selfloop transitions, 17 changer transitions 0/87 dead transitions. [2024-06-21 17:21:22,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 87 transitions, 677 flow [2024-06-21 17:21:22,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:21:22,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:21:22,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-21 17:21:22,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-21 17:21:22,151 INFO L175 Difference]: Start difference. First operand has 65 places, 67 transitions, 427 flow. Second operand 6 states and 98 transitions. [2024-06-21 17:21:22,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 87 transitions, 677 flow [2024-06-21 17:21:22,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 87 transitions, 636 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 17:21:22,160 INFO L231 Difference]: Finished difference. Result has 66 places, 70 transitions, 468 flow [2024-06-21 17:21:22,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=468, PETRI_PLACES=66, PETRI_TRANSITIONS=70} [2024-06-21 17:21:22,162 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 25 predicate places. [2024-06-21 17:21:22,162 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 70 transitions, 468 flow [2024-06-21 17:21:22,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:22,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:22,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:22,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 17:21:22,163 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:22,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:22,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1033146169, now seen corresponding path program 3 times [2024-06-21 17:21:22,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:22,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452716708] [2024-06-21 17:21:22,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:22,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:22,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:22,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:22,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:22,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452716708] [2024-06-21 17:21:22,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452716708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:22,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:22,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:21:22,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139003895] [2024-06-21 17:21:22,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:22,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:21:22,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:22,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:21:22,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:21:22,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:22,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 70 transitions, 468 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:22,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:22,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:22,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:23,068 INFO L124 PetriNetUnfolderBase]: 1647/2464 cut-off events. [2024-06-21 17:21:23,068 INFO L125 PetriNetUnfolderBase]: For 9961/9973 co-relation queries the response was YES. [2024-06-21 17:21:23,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9376 conditions, 2464 events. 1647/2464 cut-off events. For 9961/9973 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11101 event pairs, 759 based on Foata normal form. 12/2470 useless extension candidates. Maximal degree in co-relation 9347. Up to 2355 conditions per place. [2024-06-21 17:21:23,081 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 60 selfloop transitions, 24 changer transitions 0/87 dead transitions. [2024-06-21 17:21:23,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 87 transitions, 699 flow [2024-06-21 17:21:23,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:21:23,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:21:23,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-21 17:21:23,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-21 17:21:23,082 INFO L175 Difference]: Start difference. First operand has 66 places, 70 transitions, 468 flow. Second operand 6 states and 99 transitions. [2024-06-21 17:21:23,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 87 transitions, 699 flow [2024-06-21 17:21:23,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 87 transitions, 643 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 17:21:23,093 INFO L231 Difference]: Finished difference. Result has 69 places, 72 transitions, 503 flow [2024-06-21 17:21:23,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=503, PETRI_PLACES=69, PETRI_TRANSITIONS=72} [2024-06-21 17:21:23,094 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 28 predicate places. [2024-06-21 17:21:23,095 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 72 transitions, 503 flow [2024-06-21 17:21:23,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:23,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:23,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:23,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 17:21:23,095 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:23,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:23,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1033138233, now seen corresponding path program 1 times [2024-06-21 17:21:23,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:23,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532541941] [2024-06-21 17:21:23,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:23,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:23,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:23,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:23,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:23,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532541941] [2024-06-21 17:21:23,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532541941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:23,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:23,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:21:23,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556122389] [2024-06-21 17:21:23,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:23,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:21:23,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:23,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:21:23,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:21:23,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:23,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 72 transitions, 503 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:23,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:23,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:23,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:24,251 INFO L124 PetriNetUnfolderBase]: 1653/2473 cut-off events. [2024-06-21 17:21:24,251 INFO L125 PetriNetUnfolderBase]: For 9851/9863 co-relation queries the response was YES. [2024-06-21 17:21:24,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9455 conditions, 2473 events. 1653/2473 cut-off events. For 9851/9863 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11113 event pairs, 723 based on Foata normal form. 12/2479 useless extension candidates. Maximal degree in co-relation 9424. Up to 2346 conditions per place. [2024-06-21 17:21:24,265 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 62 selfloop transitions, 30 changer transitions 0/95 dead transitions. [2024-06-21 17:21:24,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 95 transitions, 769 flow [2024-06-21 17:21:24,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:21:24,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:21:24,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-21 17:21:24,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-21 17:21:24,267 INFO L175 Difference]: Start difference. First operand has 69 places, 72 transitions, 503 flow. Second operand 7 states and 114 transitions. [2024-06-21 17:21:24,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 95 transitions, 769 flow [2024-06-21 17:21:24,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 95 transitions, 733 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 17:21:24,278 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 568 flow [2024-06-21 17:21:24,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=568, PETRI_PLACES=73, PETRI_TRANSITIONS=76} [2024-06-21 17:21:24,279 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 32 predicate places. [2024-06-21 17:21:24,280 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 568 flow [2024-06-21 17:21:24,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:24,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:24,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:24,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 17:21:24,281 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:24,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:24,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1905986761, now seen corresponding path program 1 times [2024-06-21 17:21:24,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:24,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795572900] [2024-06-21 17:21:24,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:24,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:24,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:24,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:24,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:24,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795572900] [2024-06-21 17:21:24,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795572900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:24,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:24,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:21:24,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482454383] [2024-06-21 17:21:24,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:24,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:21:24,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:24,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:21:24,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:21:24,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:24,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 76 transitions, 568 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:24,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:24,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:24,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:25,163 INFO L124 PetriNetUnfolderBase]: 1675/2503 cut-off events. [2024-06-21 17:21:25,163 INFO L125 PetriNetUnfolderBase]: For 12109/12109 co-relation queries the response was YES. [2024-06-21 17:21:25,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10254 conditions, 2503 events. 1675/2503 cut-off events. For 12109/12109 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11226 event pairs, 575 based on Foata normal form. 4/2505 useless extension candidates. Maximal degree in co-relation 10222. Up to 2415 conditions per place. [2024-06-21 17:21:25,178 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 85 selfloop transitions, 20 changer transitions 0/108 dead transitions. [2024-06-21 17:21:25,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 108 transitions, 888 flow [2024-06-21 17:21:25,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:21:25,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:21:25,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 17:21:25,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41785714285714287 [2024-06-21 17:21:25,180 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 568 flow. Second operand 7 states and 117 transitions. [2024-06-21 17:21:25,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 108 transitions, 888 flow [2024-06-21 17:21:25,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 108 transitions, 817 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 17:21:25,190 INFO L231 Difference]: Finished difference. Result has 76 places, 82 transitions, 588 flow [2024-06-21 17:21:25,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=588, PETRI_PLACES=76, PETRI_TRANSITIONS=82} [2024-06-21 17:21:25,191 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 35 predicate places. [2024-06-21 17:21:25,191 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 82 transitions, 588 flow [2024-06-21 17:21:25,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:25,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:25,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:25,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 17:21:25,192 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)] === [2024-06-21 17:21:25,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:25,192 INFO L85 PathProgramCache]: Analyzing trace with hash -356135449, now seen corresponding path program 2 times [2024-06-21 17:21:25,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:25,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495840228] [2024-06-21 17:21:25,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:25,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:25,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:25,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:25,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:25,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495840228] [2024-06-21 17:21:25,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495840228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:25,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:25,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:21:25,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222495855] [2024-06-21 17:21:25,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:25,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:21:25,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:25,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:21:25,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:21:25,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:25,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 82 transitions, 588 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:25,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:25,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:25,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:26,077 INFO L124 PetriNetUnfolderBase]: 1713/2558 cut-off events. [2024-06-21 17:21:26,078 INFO L125 PetriNetUnfolderBase]: For 15207/15207 co-relation queries the response was YES. [2024-06-21 17:21:26,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11138 conditions, 2558 events. 1713/2558 cut-off events. For 15207/15207 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11492 event pairs, 562 based on Foata normal form. 4/2560 useless extension candidates. Maximal degree in co-relation 11104. Up to 2418 conditions per place. [2024-06-21 17:21:26,094 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 82 selfloop transitions, 29 changer transitions 0/114 dead transitions. [2024-06-21 17:21:26,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 114 transitions, 982 flow [2024-06-21 17:21:26,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:21:26,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:21:26,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 17:21:26,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 17:21:26,096 INFO L175 Difference]: Start difference. First operand has 76 places, 82 transitions, 588 flow. Second operand 7 states and 119 transitions. [2024-06-21 17:21:26,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 114 transitions, 982 flow [2024-06-21 17:21:26,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 114 transitions, 948 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 17:21:26,109 INFO L231 Difference]: Finished difference. Result has 80 places, 88 transitions, 679 flow [2024-06-21 17:21:26,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=679, PETRI_PLACES=80, PETRI_TRANSITIONS=88} [2024-06-21 17:21:26,110 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 39 predicate places. [2024-06-21 17:21:26,110 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 88 transitions, 679 flow [2024-06-21 17:21:26,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:26,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:26,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:26,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 17:21:26,112 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)] === [2024-06-21 17:21:26,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:26,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1962758695, now seen corresponding path program 3 times [2024-06-21 17:21:26,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:26,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784096864] [2024-06-21 17:21:26,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:26,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:26,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:26,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:26,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:26,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784096864] [2024-06-21 17:21:26,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784096864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:26,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:26,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:21:26,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085501577] [2024-06-21 17:21:26,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:26,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:21:26,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:26,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:21:26,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:21:26,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:26,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 88 transitions, 679 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:26,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:26,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:26,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:27,061 INFO L124 PetriNetUnfolderBase]: 1785/2669 cut-off events. [2024-06-21 17:21:27,061 INFO L125 PetriNetUnfolderBase]: For 19649/19658 co-relation queries the response was YES. [2024-06-21 17:21:27,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12138 conditions, 2669 events. 1785/2669 cut-off events. For 19649/19658 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12091 event pairs, 510 based on Foata normal form. 16/2676 useless extension candidates. Maximal degree in co-relation 12103. Up to 2249 conditions per place. [2024-06-21 17:21:27,076 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 81 selfloop transitions, 43 changer transitions 0/127 dead transitions. [2024-06-21 17:21:27,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 127 transitions, 1197 flow [2024-06-21 17:21:27,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:21:27,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:21:27,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 17:21:27,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-21 17:21:27,078 INFO L175 Difference]: Start difference. First operand has 80 places, 88 transitions, 679 flow. Second operand 7 states and 128 transitions. [2024-06-21 17:21:27,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 127 transitions, 1197 flow [2024-06-21 17:21:27,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 127 transitions, 1161 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 17:21:27,093 INFO L231 Difference]: Finished difference. Result has 85 places, 100 transitions, 863 flow [2024-06-21 17:21:27,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=863, PETRI_PLACES=85, PETRI_TRANSITIONS=100} [2024-06-21 17:21:27,094 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 44 predicate places. [2024-06-21 17:21:27,094 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 100 transitions, 863 flow [2024-06-21 17:21:27,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:27,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:27,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:27,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 17:21:27,095 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)] === [2024-06-21 17:21:27,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:27,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1962512431, now seen corresponding path program 1 times [2024-06-21 17:21:27,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:27,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317157770] [2024-06-21 17:21:27,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:27,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:27,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:27,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:27,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:27,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317157770] [2024-06-21 17:21:27,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317157770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:27,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:27,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:21:27,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779233557] [2024-06-21 17:21:27,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:27,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:21:27,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:27,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:21:27,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:21:27,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:27,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 100 transitions, 863 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-21 17:21:27,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:27,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:27,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:28,334 INFO L124 PetriNetUnfolderBase]: 1794/2681 cut-off events. [2024-06-21 17:21:28,334 INFO L125 PetriNetUnfolderBase]: For 23345/23360 co-relation queries the response was YES. [2024-06-21 17:21:28,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13311 conditions, 2681 events. 1794/2681 cut-off events. For 23345/23360 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12119 event pairs, 508 based on Foata normal form. 18/2693 useless extension candidates. Maximal degree in co-relation 13273. Up to 2518 conditions per place. [2024-06-21 17:21:28,348 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 91 selfloop transitions, 33 changer transitions 0/127 dead transitions. [2024-06-21 17:21:28,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 127 transitions, 1219 flow [2024-06-21 17:21:28,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:21:28,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:21:28,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 17:21:28,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403125 [2024-06-21 17:21:28,350 INFO L175 Difference]: Start difference. First operand has 85 places, 100 transitions, 863 flow. Second operand 8 states and 129 transitions. [2024-06-21 17:21:28,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 127 transitions, 1219 flow [2024-06-21 17:21:28,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 127 transitions, 1171 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-21 17:21:28,367 INFO L231 Difference]: Finished difference. Result has 91 places, 103 transitions, 931 flow [2024-06-21 17:21:28,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=931, PETRI_PLACES=91, PETRI_TRANSITIONS=103} [2024-06-21 17:21:28,368 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 50 predicate places. [2024-06-21 17:21:28,368 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 103 transitions, 931 flow [2024-06-21 17:21:28,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-21 17:21:28,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:28,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:28,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 17:21:28,369 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)] === [2024-06-21 17:21:28,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:28,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1043863846, now seen corresponding path program 1 times [2024-06-21 17:21:28,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:28,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452913211] [2024-06-21 17:21:28,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:28,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:28,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:29,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:29,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:29,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452913211] [2024-06-21 17:21:29,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452913211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:29,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:29,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:21:29,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281260937] [2024-06-21 17:21:29,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:29,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:21:29,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:29,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:21:29,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:21:29,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:29,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 103 transitions, 931 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-21 17:21:29,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:29,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:29,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:29,723 INFO L124 PetriNetUnfolderBase]: 1789/2672 cut-off events. [2024-06-21 17:21:29,723 INFO L125 PetriNetUnfolderBase]: For 25605/25605 co-relation queries the response was YES. [2024-06-21 17:21:29,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13677 conditions, 2672 events. 1789/2672 cut-off events. For 25605/25605 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12092 event pairs, 530 based on Foata normal form. 2/2672 useless extension candidates. Maximal degree in co-relation 13637. Up to 2575 conditions per place. [2024-06-21 17:21:29,740 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 103 selfloop transitions, 22 changer transitions 0/128 dead transitions. [2024-06-21 17:21:29,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 128 transitions, 1259 flow [2024-06-21 17:21:29,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:21:29,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:21:29,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 17:21:29,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41785714285714287 [2024-06-21 17:21:29,742 INFO L175 Difference]: Start difference. First operand has 91 places, 103 transitions, 931 flow. Second operand 7 states and 117 transitions. [2024-06-21 17:21:29,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 128 transitions, 1259 flow [2024-06-21 17:21:29,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 128 transitions, 1157 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 17:21:29,769 INFO L231 Difference]: Finished difference. Result has 92 places, 103 transitions, 885 flow [2024-06-21 17:21:29,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=885, PETRI_PLACES=92, PETRI_TRANSITIONS=103} [2024-06-21 17:21:29,770 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 51 predicate places. [2024-06-21 17:21:29,770 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 103 transitions, 885 flow [2024-06-21 17:21:29,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-21 17:21:29,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:29,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:29,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 17:21:29,771 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:29,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:29,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1915804637, now seen corresponding path program 1 times [2024-06-21 17:21:29,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:29,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613671650] [2024-06-21 17:21:29,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:29,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:29,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:30,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:30,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:30,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613671650] [2024-06-21 17:21:30,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613671650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:30,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:30,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:21:30,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528447246] [2024-06-21 17:21:30,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:30,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:21:30,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:30,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:21:30,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:21:30,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:30,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 103 transitions, 885 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:30,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:30,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:30,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:30,651 INFO L124 PetriNetUnfolderBase]: 1811/2708 cut-off events. [2024-06-21 17:21:30,651 INFO L125 PetriNetUnfolderBase]: For 28866/28887 co-relation queries the response was YES. [2024-06-21 17:21:30,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13865 conditions, 2708 events. 1811/2708 cut-off events. For 28866/28887 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12300 event pairs, 524 based on Foata normal form. 18/2718 useless extension candidates. Maximal degree in co-relation 13824. Up to 2593 conditions per place. [2024-06-21 17:21:30,665 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 105 selfloop transitions, 22 changer transitions 0/130 dead transitions. [2024-06-21 17:21:30,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 130 transitions, 1247 flow [2024-06-21 17:21:30,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:21:30,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:21:30,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 17:21:30,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-21 17:21:30,667 INFO L175 Difference]: Start difference. First operand has 92 places, 103 transitions, 885 flow. Second operand 7 states and 116 transitions. [2024-06-21 17:21:30,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 130 transitions, 1247 flow [2024-06-21 17:21:30,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 130 transitions, 1191 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 17:21:30,686 INFO L231 Difference]: Finished difference. Result has 93 places, 106 transitions, 919 flow [2024-06-21 17:21:30,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=919, PETRI_PLACES=93, PETRI_TRANSITIONS=106} [2024-06-21 17:21:30,687 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 52 predicate places. [2024-06-21 17:21:30,687 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 106 transitions, 919 flow [2024-06-21 17:21:30,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:30,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:30,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:30,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 17:21:30,688 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)] === [2024-06-21 17:21:30,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:30,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1047673281, now seen corresponding path program 2 times [2024-06-21 17:21:30,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:30,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440976802] [2024-06-21 17:21:30,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:30,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:30,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:31,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:31,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:31,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440976802] [2024-06-21 17:21:31,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440976802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:31,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:31,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:21:31,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351593276] [2024-06-21 17:21:31,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:31,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:21:31,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:31,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:21:31,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:21:31,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:31,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 106 transitions, 919 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:31,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:31,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:31,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:31,692 INFO L124 PetriNetUnfolderBase]: 1881/2810 cut-off events. [2024-06-21 17:21:31,692 INFO L125 PetriNetUnfolderBase]: For 33671/33680 co-relation queries the response was YES. [2024-06-21 17:21:31,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14838 conditions, 2810 events. 1881/2810 cut-off events. For 33671/33680 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12828 event pairs, 508 based on Foata normal form. 8/2809 useless extension candidates. Maximal degree in co-relation 14796. Up to 2316 conditions per place. [2024-06-21 17:21:31,711 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 84 selfloop transitions, 53 changer transitions 0/140 dead transitions. [2024-06-21 17:21:31,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 140 transitions, 1481 flow [2024-06-21 17:21:31,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:21:31,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:21:31,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 17:21:31,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 17:21:31,713 INFO L175 Difference]: Start difference. First operand has 93 places, 106 transitions, 919 flow. Second operand 7 states and 125 transitions. [2024-06-21 17:21:31,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 140 transitions, 1481 flow [2024-06-21 17:21:31,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 140 transitions, 1419 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 17:21:31,744 INFO L231 Difference]: Finished difference. Result has 96 places, 113 transitions, 1076 flow [2024-06-21 17:21:31,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=857, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1076, PETRI_PLACES=96, PETRI_TRANSITIONS=113} [2024-06-21 17:21:31,745 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 55 predicate places. [2024-06-21 17:21:31,745 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 113 transitions, 1076 flow [2024-06-21 17:21:31,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:31,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:31,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:31,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 17:21:31,747 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)] === [2024-06-21 17:21:31,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:31,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1552322645, now seen corresponding path program 3 times [2024-06-21 17:21:31,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:31,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130715210] [2024-06-21 17:21:31,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:31,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:31,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:32,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:32,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:32,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130715210] [2024-06-21 17:21:32,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130715210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:32,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:32,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:21:32,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573645207] [2024-06-21 17:21:32,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:32,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:21:32,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:32,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:21:32,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:21:32,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:32,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 113 transitions, 1076 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:32,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:32,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:32,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:32,726 INFO L124 PetriNetUnfolderBase]: 1861/2782 cut-off events. [2024-06-21 17:21:32,726 INFO L125 PetriNetUnfolderBase]: For 37796/37805 co-relation queries the response was YES. [2024-06-21 17:21:32,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15366 conditions, 2782 events. 1861/2782 cut-off events. For 37796/37805 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12675 event pairs, 506 based on Foata normal form. 12/2785 useless extension candidates. Maximal degree in co-relation 15322. Up to 2304 conditions per place. [2024-06-21 17:21:32,743 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 82 selfloop transitions, 55 changer transitions 0/140 dead transitions. [2024-06-21 17:21:32,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 140 transitions, 1568 flow [2024-06-21 17:21:32,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:21:32,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:21:32,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 17:21:32,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45357142857142857 [2024-06-21 17:21:32,745 INFO L175 Difference]: Start difference. First operand has 96 places, 113 transitions, 1076 flow. Second operand 7 states and 127 transitions. [2024-06-21 17:21:32,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 140 transitions, 1568 flow [2024-06-21 17:21:32,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 140 transitions, 1466 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-21 17:21:32,783 INFO L231 Difference]: Finished difference. Result has 100 places, 113 transitions, 1094 flow [2024-06-21 17:21:32,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=974, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1094, PETRI_PLACES=100, PETRI_TRANSITIONS=113} [2024-06-21 17:21:32,784 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 59 predicate places. [2024-06-21 17:21:32,784 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 113 transitions, 1094 flow [2024-06-21 17:21:32,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:32,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:32,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:32,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 17:21:32,784 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:32,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:32,785 INFO L85 PathProgramCache]: Analyzing trace with hash -708618296, now seen corresponding path program 1 times [2024-06-21 17:21:32,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:32,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952394818] [2024-06-21 17:21:32,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:32,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:32,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:33,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:33,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:33,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952394818] [2024-06-21 17:21:33,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952394818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:33,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:33,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:21:33,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902957469] [2024-06-21 17:21:33,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:33,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:21:33,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:33,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:21:33,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:21:33,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:33,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 113 transitions, 1094 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:33,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:33,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:33,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:33,910 INFO L124 PetriNetUnfolderBase]: 1872/2795 cut-off events. [2024-06-21 17:21:33,910 INFO L125 PetriNetUnfolderBase]: For 40617/40632 co-relation queries the response was YES. [2024-06-21 17:21:33,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15646 conditions, 2795 events. 1872/2795 cut-off events. For 40617/40632 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12682 event pairs, 525 based on Foata normal form. 12/2801 useless extension candidates. Maximal degree in co-relation 15601. Up to 2677 conditions per place. [2024-06-21 17:21:33,925 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 105 selfloop transitions, 27 changer transitions 0/135 dead transitions. [2024-06-21 17:21:33,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 135 transitions, 1459 flow [2024-06-21 17:21:33,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:21:33,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:21:33,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 17:21:33,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-21 17:21:33,927 INFO L175 Difference]: Start difference. First operand has 100 places, 113 transitions, 1094 flow. Second operand 7 states and 113 transitions. [2024-06-21 17:21:33,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 135 transitions, 1459 flow [2024-06-21 17:21:33,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 135 transitions, 1313 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 17:21:33,963 INFO L231 Difference]: Finished difference. Result has 101 places, 116 transitions, 1059 flow [2024-06-21 17:21:33,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=953, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1059, PETRI_PLACES=101, PETRI_TRANSITIONS=116} [2024-06-21 17:21:33,964 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 60 predicate places. [2024-06-21 17:21:33,964 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 116 transitions, 1059 flow [2024-06-21 17:21:33,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:33,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:33,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:33,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 17:21:33,965 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:33,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:33,965 INFO L85 PathProgramCache]: Analyzing trace with hash -708351386, now seen corresponding path program 2 times [2024-06-21 17:21:33,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:33,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495957877] [2024-06-21 17:21:33,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:33,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:33,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:34,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:34,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:34,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495957877] [2024-06-21 17:21:34,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495957877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:34,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:34,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:21:34,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993984607] [2024-06-21 17:21:34,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:34,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:21:34,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:34,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:21:34,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:21:34,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:34,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 116 transitions, 1059 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:34,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:34,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:34,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:35,272 INFO L124 PetriNetUnfolderBase]: 1861/2778 cut-off events. [2024-06-21 17:21:35,272 INFO L125 PetriNetUnfolderBase]: For 43104/43119 co-relation queries the response was YES. [2024-06-21 17:21:35,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15496 conditions, 2778 events. 1861/2778 cut-off events. For 43104/43119 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12580 event pairs, 525 based on Foata normal form. 12/2784 useless extension candidates. Maximal degree in co-relation 15450. Up to 2633 conditions per place. [2024-06-21 17:21:35,290 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 104 selfloop transitions, 34 changer transitions 0/141 dead transitions. [2024-06-21 17:21:35,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 141 transitions, 1433 flow [2024-06-21 17:21:35,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:21:35,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:21:35,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-21 17:21:35,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 17:21:35,292 INFO L175 Difference]: Start difference. First operand has 101 places, 116 transitions, 1059 flow. Second operand 8 states and 128 transitions. [2024-06-21 17:21:35,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 141 transitions, 1433 flow [2024-06-21 17:21:35,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 141 transitions, 1365 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 17:21:35,330 INFO L231 Difference]: Finished difference. Result has 104 places, 118 transitions, 1103 flow [2024-06-21 17:21:35,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=991, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1103, PETRI_PLACES=104, PETRI_TRANSITIONS=118} [2024-06-21 17:21:35,331 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 63 predicate places. [2024-06-21 17:21:35,331 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 118 transitions, 1103 flow [2024-06-21 17:21:35,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:35,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:35,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:35,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 17:21:35,332 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:35,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:35,332 INFO L85 PathProgramCache]: Analyzing trace with hash -2000018058, now seen corresponding path program 1 times [2024-06-21 17:21:35,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:35,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451993950] [2024-06-21 17:21:35,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:35,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:35,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:36,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:36,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:36,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451993950] [2024-06-21 17:21:36,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451993950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:36,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:36,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:36,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535746366] [2024-06-21 17:21:36,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:36,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:36,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:36,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:36,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:36,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:36,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 118 transitions, 1103 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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) [2024-06-21 17:21:36,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:36,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:36,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:36,761 INFO L124 PetriNetUnfolderBase]: 1878/2803 cut-off events. [2024-06-21 17:21:36,761 INFO L125 PetriNetUnfolderBase]: For 47429/47429 co-relation queries the response was YES. [2024-06-21 17:21:36,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15909 conditions, 2803 events. 1878/2803 cut-off events. For 47429/47429 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12740 event pairs, 361 based on Foata normal form. 4/2805 useless extension candidates. Maximal degree in co-relation 15862. Up to 2680 conditions per place. [2024-06-21 17:21:36,778 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 127 selfloop transitions, 20 changer transitions 0/150 dead transitions. [2024-06-21 17:21:36,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 150 transitions, 1517 flow [2024-06-21 17:21:36,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:21:36,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:21:36,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 17:21:36,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-21 17:21:36,779 INFO L175 Difference]: Start difference. First operand has 104 places, 118 transitions, 1103 flow. Second operand 8 states and 130 transitions. [2024-06-21 17:21:36,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 150 transitions, 1517 flow [2024-06-21 17:21:36,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 150 transitions, 1431 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 17:21:36,826 INFO L231 Difference]: Finished difference. Result has 106 places, 120 transitions, 1098 flow [2024-06-21 17:21:36,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1017, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1098, PETRI_PLACES=106, PETRI_TRANSITIONS=120} [2024-06-21 17:21:36,827 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 65 predicate places. [2024-06-21 17:21:36,827 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 120 transitions, 1098 flow [2024-06-21 17:21:36,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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) [2024-06-21 17:21:36,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:36,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:36,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 17:21:36,827 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:36,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:36,828 INFO L85 PathProgramCache]: Analyzing trace with hash 736798740, now seen corresponding path program 1 times [2024-06-21 17:21:36,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:36,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810174960] [2024-06-21 17:21:36,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:36,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:36,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:37,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:37,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:37,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810174960] [2024-06-21 17:21:37,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810174960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:37,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:37,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:21:37,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492257743] [2024-06-21 17:21:37,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:37,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:21:37,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:37,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:21:37,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:21:37,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:37,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 120 transitions, 1098 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 17:21:37,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:37,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:37,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:38,055 INFO L124 PetriNetUnfolderBase]: 1873/2798 cut-off events. [2024-06-21 17:21:38,055 INFO L125 PetriNetUnfolderBase]: For 47201/47216 co-relation queries the response was YES. [2024-06-21 17:21:38,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15896 conditions, 2798 events. 1873/2798 cut-off events. For 47201/47216 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12730 event pairs, 466 based on Foata normal form. 12/2804 useless extension candidates. Maximal degree in co-relation 15848. Up to 2667 conditions per place. [2024-06-21 17:21:38,073 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 117 selfloop transitions, 27 changer transitions 0/147 dead transitions. [2024-06-21 17:21:38,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 147 transitions, 1502 flow [2024-06-21 17:21:38,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:21:38,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:21:38,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 17:21:38,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-21 17:21:38,075 INFO L175 Difference]: Start difference. First operand has 106 places, 120 transitions, 1098 flow. Second operand 7 states and 116 transitions. [2024-06-21 17:21:38,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 147 transitions, 1502 flow [2024-06-21 17:21:38,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 147 transitions, 1439 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 17:21:38,116 INFO L231 Difference]: Finished difference. Result has 107 places, 123 transitions, 1147 flow [2024-06-21 17:21:38,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1035, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1147, PETRI_PLACES=107, PETRI_TRANSITIONS=123} [2024-06-21 17:21:38,117 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 66 predicate places. [2024-06-21 17:21:38,117 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 123 transitions, 1147 flow [2024-06-21 17:21:38,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 17:21:38,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:38,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:38,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 17:21:38,118 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:38,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:38,118 INFO L85 PathProgramCache]: Analyzing trace with hash -995625670, now seen corresponding path program 2 times [2024-06-21 17:21:38,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:38,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183358476] [2024-06-21 17:21:38,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:38,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:38,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:38,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:38,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:38,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183358476] [2024-06-21 17:21:38,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183358476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:38,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:38,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:38,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419608497] [2024-06-21 17:21:38,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:38,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:38,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:38,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:38,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:38,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:38,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 123 transitions, 1147 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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) [2024-06-21 17:21:38,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:38,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:38,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:39,587 INFO L124 PetriNetUnfolderBase]: 1890/2823 cut-off events. [2024-06-21 17:21:39,587 INFO L125 PetriNetUnfolderBase]: For 52573/52573 co-relation queries the response was YES. [2024-06-21 17:21:39,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16368 conditions, 2823 events. 1890/2823 cut-off events. For 52573/52573 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12864 event pairs, 461 based on Foata normal form. 4/2825 useless extension candidates. Maximal degree in co-relation 16319. Up to 2703 conditions per place. [2024-06-21 17:21:39,607 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 128 selfloop transitions, 24 changer transitions 0/155 dead transitions. [2024-06-21 17:21:39,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 155 transitions, 1577 flow [2024-06-21 17:21:39,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:21:39,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:21:39,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 17:21:39,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409375 [2024-06-21 17:21:39,609 INFO L175 Difference]: Start difference. First operand has 107 places, 123 transitions, 1147 flow. Second operand 8 states and 131 transitions. [2024-06-21 17:21:39,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 155 transitions, 1577 flow [2024-06-21 17:21:39,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 155 transitions, 1499 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 17:21:39,662 INFO L231 Difference]: Finished difference. Result has 110 places, 125 transitions, 1163 flow [2024-06-21 17:21:39,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1069, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1163, PETRI_PLACES=110, PETRI_TRANSITIONS=125} [2024-06-21 17:21:39,662 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 69 predicate places. [2024-06-21 17:21:39,662 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 125 transitions, 1163 flow [2024-06-21 17:21:39,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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) [2024-06-21 17:21:39,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:39,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:39,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 17:21:39,663 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:39,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:39,663 INFO L85 PathProgramCache]: Analyzing trace with hash -2054656250, now seen corresponding path program 1 times [2024-06-21 17:21:39,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:39,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788061364] [2024-06-21 17:21:39,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:39,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:39,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:40,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:40,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:40,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788061364] [2024-06-21 17:21:40,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788061364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:40,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:40,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:21:40,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022418184] [2024-06-21 17:21:40,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:40,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:21:40,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:40,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:21:40,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:21:40,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:40,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 125 transitions, 1163 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 17:21:40,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:40,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:40,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:41,061 INFO L124 PetriNetUnfolderBase]: 1912/2859 cut-off events. [2024-06-21 17:21:41,061 INFO L125 PetriNetUnfolderBase]: For 53596/53617 co-relation queries the response was YES. [2024-06-21 17:21:41,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16525 conditions, 2859 events. 1912/2859 cut-off events. For 53596/53617 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13099 event pairs, 470 based on Foata normal form. 18/2869 useless extension candidates. Maximal degree in co-relation 16475. Up to 2721 conditions per place. [2024-06-21 17:21:41,080 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 129 selfloop transitions, 25 changer transitions 0/157 dead transitions. [2024-06-21 17:21:41,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 157 transitions, 1598 flow [2024-06-21 17:21:41,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:21:41,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:21:41,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 17:21:41,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409375 [2024-06-21 17:21:41,081 INFO L175 Difference]: Start difference. First operand has 110 places, 125 transitions, 1163 flow. Second operand 8 states and 131 transitions. [2024-06-21 17:21:41,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 157 transitions, 1598 flow [2024-06-21 17:21:41,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 157 transitions, 1524 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 17:21:41,125 INFO L231 Difference]: Finished difference. Result has 112 places, 128 transitions, 1188 flow [2024-06-21 17:21:41,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1089, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1188, PETRI_PLACES=112, PETRI_TRANSITIONS=128} [2024-06-21 17:21:41,126 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 71 predicate places. [2024-06-21 17:21:41,126 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 128 transitions, 1188 flow [2024-06-21 17:21:41,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 17:21:41,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:41,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:41,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 17:21:41,127 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:41,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:41,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1881864968, now seen corresponding path program 2 times [2024-06-21 17:21:41,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:41,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027458480] [2024-06-21 17:21:41,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:41,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:41,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:41,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:41,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:41,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027458480] [2024-06-21 17:21:41,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027458480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:41,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:41,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:21:41,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749657473] [2024-06-21 17:21:41,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:41,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:21:41,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:41,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:21:41,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:21:41,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:41,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 128 transitions, 1188 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 17:21:41,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:41,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:41,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:42,348 INFO L124 PetriNetUnfolderBase]: 1934/2892 cut-off events. [2024-06-21 17:21:42,349 INFO L125 PetriNetUnfolderBase]: For 58074/58083 co-relation queries the response was YES. [2024-06-21 17:21:42,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16876 conditions, 2892 events. 1934/2892 cut-off events. For 58074/58083 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13265 event pairs, 474 based on Foata normal form. 8/2891 useless extension candidates. Maximal degree in co-relation 16825. Up to 2389 conditions per place. [2024-06-21 17:21:42,368 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 91 selfloop transitions, 66 changer transitions 0/160 dead transitions. [2024-06-21 17:21:42,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 160 transitions, 1717 flow [2024-06-21 17:21:42,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:21:42,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:21:42,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 17:21:42,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-21 17:21:42,369 INFO L175 Difference]: Start difference. First operand has 112 places, 128 transitions, 1188 flow. Second operand 8 states and 138 transitions. [2024-06-21 17:21:42,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 160 transitions, 1717 flow [2024-06-21 17:21:42,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 160 transitions, 1651 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 17:21:42,418 INFO L231 Difference]: Finished difference. Result has 114 places, 131 transitions, 1303 flow [2024-06-21 17:21:42,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1122, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1303, PETRI_PLACES=114, PETRI_TRANSITIONS=131} [2024-06-21 17:21:42,418 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 73 predicate places. [2024-06-21 17:21:42,418 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 131 transitions, 1303 flow [2024-06-21 17:21:42,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 17:21:42,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:42,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:42,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 17:21:42,419 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:42,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:42,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1881869928, now seen corresponding path program 3 times [2024-06-21 17:21:42,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:42,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453788156] [2024-06-21 17:21:42,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:42,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:42,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:43,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:43,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:43,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453788156] [2024-06-21 17:21:43,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453788156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:43,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:43,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:43,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247508097] [2024-06-21 17:21:43,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:43,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:43,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:43,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:43,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:43,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:43,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 131 transitions, 1303 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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) [2024-06-21 17:21:43,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:43,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:43,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:43,754 INFO L124 PetriNetUnfolderBase]: 1951/2914 cut-off events. [2024-06-21 17:21:43,754 INFO L125 PetriNetUnfolderBase]: For 63121/63121 co-relation queries the response was YES. [2024-06-21 17:21:43,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17497 conditions, 2914 events. 1951/2914 cut-off events. For 63121/63121 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13373 event pairs, 453 based on Foata normal form. 4/2916 useless extension candidates. Maximal degree in co-relation 17445. Up to 2758 conditions per place. [2024-06-21 17:21:43,773 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 128 selfloop transitions, 31 changer transitions 0/162 dead transitions. [2024-06-21 17:21:43,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 162 transitions, 1749 flow [2024-06-21 17:21:43,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:21:43,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:21:43,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 17:21:43,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409375 [2024-06-21 17:21:43,774 INFO L175 Difference]: Start difference. First operand has 114 places, 131 transitions, 1303 flow. Second operand 8 states and 131 transitions. [2024-06-21 17:21:43,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 162 transitions, 1749 flow [2024-06-21 17:21:43,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 162 transitions, 1591 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 17:21:43,828 INFO L231 Difference]: Finished difference. Result has 116 places, 133 transitions, 1256 flow [2024-06-21 17:21:43,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1256, PETRI_PLACES=116, PETRI_TRANSITIONS=133} [2024-06-21 17:21:43,829 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 75 predicate places. [2024-06-21 17:21:43,829 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 133 transitions, 1256 flow [2024-06-21 17:21:43,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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) [2024-06-21 17:21:43,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:43,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:43,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 17:21:43,829 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:43,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:43,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1939192100, now seen corresponding path program 3 times [2024-06-21 17:21:43,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:43,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696495486] [2024-06-21 17:21:43,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:43,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:43,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:44,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:44,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:44,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696495486] [2024-06-21 17:21:44,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696495486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:44,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:44,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:21:44,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627284195] [2024-06-21 17:21:44,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:44,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:21:44,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:44,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:21:44,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:21:44,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:44,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 133 transitions, 1256 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 17:21:44,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:44,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:44,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:45,089 INFO L124 PetriNetUnfolderBase]: 1957/2928 cut-off events. [2024-06-21 17:21:45,089 INFO L125 PetriNetUnfolderBase]: For 67885/67894 co-relation queries the response was YES. [2024-06-21 17:21:45,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17582 conditions, 2928 events. 1957/2928 cut-off events. For 67885/67894 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13445 event pairs, 469 based on Foata normal form. 8/2927 useless extension candidates. Maximal degree in co-relation 17529. Up to 2425 conditions per place. [2024-06-21 17:21:45,115 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 94 selfloop transitions, 70 changer transitions 0/167 dead transitions. [2024-06-21 17:21:45,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 167 transitions, 1903 flow [2024-06-21 17:21:45,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:21:45,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:21:45,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 17:21:45,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-06-21 17:21:45,116 INFO L175 Difference]: Start difference. First operand has 116 places, 133 transitions, 1256 flow. Second operand 8 states and 142 transitions. [2024-06-21 17:21:45,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 167 transitions, 1903 flow [2024-06-21 17:21:45,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 167 transitions, 1810 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 17:21:45,182 INFO L231 Difference]: Finished difference. Result has 118 places, 136 transitions, 1352 flow [2024-06-21 17:21:45,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1163, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1352, PETRI_PLACES=118, PETRI_TRANSITIONS=136} [2024-06-21 17:21:45,183 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 77 predicate places. [2024-06-21 17:21:45,183 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 136 transitions, 1352 flow [2024-06-21 17:21:45,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 17:21:45,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:45,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:45,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 17:21:45,183 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:45,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:45,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1228395932, now seen corresponding path program 1 times [2024-06-21 17:21:45,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:45,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055419557] [2024-06-21 17:21:45,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:45,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:45,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:45,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:45,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:45,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055419557] [2024-06-21 17:21:45,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055419557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:45,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:45,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:21:45,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458278434] [2024-06-21 17:21:45,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:45,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:21:45,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:45,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:21:45,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:21:45,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:45,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 136 transitions, 1352 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:45,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:45,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:45,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:46,095 INFO L124 PetriNetUnfolderBase]: 1962/2930 cut-off events. [2024-06-21 17:21:46,096 INFO L125 PetriNetUnfolderBase]: For 71087/71087 co-relation queries the response was YES. [2024-06-21 17:21:46,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17984 conditions, 2930 events. 1962/2930 cut-off events. For 71087/71087 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13451 event pairs, 478 based on Foata normal form. 1/2929 useless extension candidates. Maximal degree in co-relation 17930. Up to 2884 conditions per place. [2024-06-21 17:21:46,115 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 138 selfloop transitions, 19 changer transitions 0/160 dead transitions. [2024-06-21 17:21:46,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 160 transitions, 1826 flow [2024-06-21 17:21:46,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:21:46,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:21:46,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-21 17:21:46,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4041666666666667 [2024-06-21 17:21:46,117 INFO L175 Difference]: Start difference. First operand has 118 places, 136 transitions, 1352 flow. Second operand 6 states and 97 transitions. [2024-06-21 17:21:46,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 160 transitions, 1826 flow [2024-06-21 17:21:46,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 160 transitions, 1660 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 17:21:46,187 INFO L231 Difference]: Finished difference. Result has 119 places, 145 transitions, 1315 flow [2024-06-21 17:21:46,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1186, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1315, PETRI_PLACES=119, PETRI_TRANSITIONS=145} [2024-06-21 17:21:46,188 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 78 predicate places. [2024-06-21 17:21:46,188 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 145 transitions, 1315 flow [2024-06-21 17:21:46,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:46,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:46,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:46,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 17:21:46,189 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)] === [2024-06-21 17:21:46,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:46,189 INFO L85 PathProgramCache]: Analyzing trace with hash -720414824, now seen corresponding path program 4 times [2024-06-21 17:21:46,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:46,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611819591] [2024-06-21 17:21:46,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:46,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:46,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:46,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:46,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:46,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611819591] [2024-06-21 17:21:46,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611819591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:46,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:46,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:46,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384082366] [2024-06-21 17:21:46,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:46,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:46,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:46,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:46,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:47,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:47,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 145 transitions, 1315 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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) [2024-06-21 17:21:47,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:47,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:47,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:47,595 INFO L124 PetriNetUnfolderBase]: 2046/3075 cut-off events. [2024-06-21 17:21:47,595 INFO L125 PetriNetUnfolderBase]: For 84848/84857 co-relation queries the response was YES. [2024-06-21 17:21:47,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18650 conditions, 3075 events. 2046/3075 cut-off events. For 84848/84857 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14307 event pairs, 494 based on Foata normal form. 32/3098 useless extension candidates. Maximal degree in co-relation 18594. Up to 2416 conditions per place. [2024-06-21 17:21:47,614 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 111 selfloop transitions, 69 changer transitions 0/183 dead transitions. [2024-06-21 17:21:47,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 183 transitions, 2039 flow [2024-06-21 17:21:47,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:21:47,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:21:47,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 17:21:47,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.459375 [2024-06-21 17:21:47,615 INFO L175 Difference]: Start difference. First operand has 119 places, 145 transitions, 1315 flow. Second operand 8 states and 147 transitions. [2024-06-21 17:21:47,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 183 transitions, 2039 flow [2024-06-21 17:21:47,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 183 transitions, 2017 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-06-21 17:21:47,681 INFO L231 Difference]: Finished difference. Result has 126 places, 148 transitions, 1500 flow [2024-06-21 17:21:47,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1293, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1500, PETRI_PLACES=126, PETRI_TRANSITIONS=148} [2024-06-21 17:21:47,682 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 85 predicate places. [2024-06-21 17:21:47,682 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 148 transitions, 1500 flow [2024-06-21 17:21:47,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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) [2024-06-21 17:21:47,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:47,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:47,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 17:21:47,683 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)] === [2024-06-21 17:21:47,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:47,683 INFO L85 PathProgramCache]: Analyzing trace with hash -492335734, now seen corresponding path program 4 times [2024-06-21 17:21:47,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:47,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280511905] [2024-06-21 17:21:47,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:47,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:47,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:48,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:48,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:48,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280511905] [2024-06-21 17:21:48,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280511905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:48,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:48,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:21:48,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022146098] [2024-06-21 17:21:48,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:48,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:21:48,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:48,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:21:48,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:21:48,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:48,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 148 transitions, 1500 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 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) [2024-06-21 17:21:48,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:48,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:48,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:48,755 INFO L124 PetriNetUnfolderBase]: 2036/3061 cut-off events. [2024-06-21 17:21:48,755 INFO L125 PetriNetUnfolderBase]: For 83634/83643 co-relation queries the response was YES. [2024-06-21 17:21:48,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19348 conditions, 3061 events. 2036/3061 cut-off events. For 83634/83643 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14287 event pairs, 492 based on Foata normal form. 8/3060 useless extension candidates. Maximal degree in co-relation 19289. Up to 2712 conditions per place. [2024-06-21 17:21:48,775 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 120 selfloop transitions, 51 changer transitions 0/174 dead transitions. [2024-06-21 17:21:48,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 174 transitions, 1945 flow [2024-06-21 17:21:48,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:21:48,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:21:48,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 17:21:48,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43214285714285716 [2024-06-21 17:21:48,776 INFO L175 Difference]: Start difference. First operand has 126 places, 148 transitions, 1500 flow. Second operand 7 states and 121 transitions. [2024-06-21 17:21:48,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 174 transitions, 1945 flow [2024-06-21 17:21:48,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 174 transitions, 1757 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 17:21:48,855 INFO L231 Difference]: Finished difference. Result has 129 places, 152 transitions, 1508 flow [2024-06-21 17:21:48,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1319, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1508, PETRI_PLACES=129, PETRI_TRANSITIONS=152} [2024-06-21 17:21:48,856 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 88 predicate places. [2024-06-21 17:21:48,856 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 152 transitions, 1508 flow [2024-06-21 17:21:48,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 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) [2024-06-21 17:21:48,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:48,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:48,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 17:21:48,857 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)] === [2024-06-21 17:21:48,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:48,857 INFO L85 PathProgramCache]: Analyzing trace with hash -492328976, now seen corresponding path program 1 times [2024-06-21 17:21:48,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:48,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770085151] [2024-06-21 17:21:48,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:48,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:48,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:49,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:49,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:49,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770085151] [2024-06-21 17:21:49,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770085151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:49,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:49,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:21:49,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197671488] [2024-06-21 17:21:49,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:49,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:21:49,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:49,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:21:49,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:21:49,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:49,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 152 transitions, 1508 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 17:21:49,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:49,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:49,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:49,994 INFO L124 PetriNetUnfolderBase]: 2053/3085 cut-off events. [2024-06-21 17:21:49,994 INFO L125 PetriNetUnfolderBase]: For 87350/87368 co-relation queries the response was YES. [2024-06-21 17:21:50,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19506 conditions, 3085 events. 2053/3085 cut-off events. For 87350/87368 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14400 event pairs, 503 based on Foata normal form. 16/3095 useless extension candidates. Maximal degree in co-relation 19444. Up to 2949 conditions per place. [2024-06-21 17:21:50,018 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 146 selfloop transitions, 29 changer transitions 0/178 dead transitions. [2024-06-21 17:21:50,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 178 transitions, 1970 flow [2024-06-21 17:21:50,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:21:50,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:21:50,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 17:21:50,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-21 17:21:50,019 INFO L175 Difference]: Start difference. First operand has 129 places, 152 transitions, 1508 flow. Second operand 8 states and 127 transitions. [2024-06-21 17:21:50,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 178 transitions, 1970 flow [2024-06-21 17:21:50,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 178 transitions, 1899 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-21 17:21:50,104 INFO L231 Difference]: Finished difference. Result has 133 places, 154 transitions, 1546 flow [2024-06-21 17:21:50,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1437, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1546, PETRI_PLACES=133, PETRI_TRANSITIONS=154} [2024-06-21 17:21:50,105 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 92 predicate places. [2024-06-21 17:21:50,105 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 154 transitions, 1546 flow [2024-06-21 17:21:50,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 17:21:50,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:50,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:50,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 17:21:50,105 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)] === [2024-06-21 17:21:50,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:50,106 INFO L85 PathProgramCache]: Analyzing trace with hash -483758096, now seen corresponding path program 2 times [2024-06-21 17:21:50,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:50,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958596722] [2024-06-21 17:21:50,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:50,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:50,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:50,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:50,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:50,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958596722] [2024-06-21 17:21:50,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958596722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:50,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:50,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:21:50,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861606071] [2024-06-21 17:21:50,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:50,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:21:50,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:50,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:21:50,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:21:50,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:50,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 154 transitions, 1546 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 17:21:50,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:50,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:50,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:51,327 INFO L124 PetriNetUnfolderBase]: 2070/3112 cut-off events. [2024-06-21 17:21:51,327 INFO L125 PetriNetUnfolderBase]: For 94375/94393 co-relation queries the response was YES. [2024-06-21 17:21:51,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19967 conditions, 3112 events. 2070/3112 cut-off events. For 94375/94393 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14606 event pairs, 468 based on Foata normal form. 16/3122 useless extension candidates. Maximal degree in co-relation 19904. Up to 2866 conditions per place. [2024-06-21 17:21:51,349 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 143 selfloop transitions, 39 changer transitions 0/185 dead transitions. [2024-06-21 17:21:51,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 185 transitions, 2186 flow [2024-06-21 17:21:51,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:21:51,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:21:51,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 17:21:51,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-21 17:21:51,351 INFO L175 Difference]: Start difference. First operand has 133 places, 154 transitions, 1546 flow. Second operand 8 states and 130 transitions. [2024-06-21 17:21:51,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 185 transitions, 2186 flow [2024-06-21 17:21:51,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 185 transitions, 2095 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 17:21:51,445 INFO L231 Difference]: Finished difference. Result has 135 places, 158 transitions, 1632 flow [2024-06-21 17:21:51,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1455, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1632, PETRI_PLACES=135, PETRI_TRANSITIONS=158} [2024-06-21 17:21:51,446 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 94 predicate places. [2024-06-21 17:21:51,446 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 158 transitions, 1632 flow [2024-06-21 17:21:51,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 17:21:51,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:51,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:51,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 17:21:51,447 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)] === [2024-06-21 17:21:51,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:51,447 INFO L85 PathProgramCache]: Analyzing trace with hash -484054766, now seen corresponding path program 3 times [2024-06-21 17:21:51,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:51,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861298094] [2024-06-21 17:21:51,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:51,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:51,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:52,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:52,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:52,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861298094] [2024-06-21 17:21:52,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861298094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:52,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:52,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:21:52,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897332010] [2024-06-21 17:21:52,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:52,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:21:52,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:52,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:21:52,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:21:52,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:52,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 158 transitions, 1632 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 17:21:52,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:52,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:52,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:52,757 INFO L124 PetriNetUnfolderBase]: 2062/3100 cut-off events. [2024-06-21 17:21:52,757 INFO L125 PetriNetUnfolderBase]: For 99329/99347 co-relation queries the response was YES. [2024-06-21 17:21:52,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20087 conditions, 3100 events. 2062/3100 cut-off events. For 99329/99347 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14504 event pairs, 501 based on Foata normal form. 16/3110 useless extension candidates. Maximal degree in co-relation 20023. Up to 2919 conditions per place. [2024-06-21 17:21:52,776 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 145 selfloop transitions, 38 changer transitions 0/186 dead transitions. [2024-06-21 17:21:52,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 186 transitions, 2082 flow [2024-06-21 17:21:52,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:21:52,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:21:52,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-21 17:21:52,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39444444444444443 [2024-06-21 17:21:52,777 INFO L175 Difference]: Start difference. First operand has 135 places, 158 transitions, 1632 flow. Second operand 9 states and 142 transitions. [2024-06-21 17:21:52,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 186 transitions, 2082 flow [2024-06-21 17:21:52,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 186 transitions, 1974 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-21 17:21:52,878 INFO L231 Difference]: Finished difference. Result has 140 places, 158 transitions, 1610 flow [2024-06-21 17:21:52,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1524, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1610, PETRI_PLACES=140, PETRI_TRANSITIONS=158} [2024-06-21 17:21:52,878 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 99 predicate places. [2024-06-21 17:21:52,879 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 158 transitions, 1610 flow [2024-06-21 17:21:52,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 17:21:52,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:52,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:52,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 17:21:52,879 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:52,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:52,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1809648722, now seen corresponding path program 2 times [2024-06-21 17:21:52,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:52,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781238152] [2024-06-21 17:21:52,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:52,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:52,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:53,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:53,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:53,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781238152] [2024-06-21 17:21:53,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781238152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:53,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:53,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:21:53,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208922652] [2024-06-21 17:21:53,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:53,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:21:53,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:53,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:21:53,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:21:53,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:53,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 158 transitions, 1610 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:53,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:53,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:53,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:53,850 INFO L124 PetriNetUnfolderBase]: 2069/3108 cut-off events. [2024-06-21 17:21:53,850 INFO L125 PetriNetUnfolderBase]: For 102650/102650 co-relation queries the response was YES. [2024-06-21 17:21:53,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20287 conditions, 3108 events. 2069/3108 cut-off events. For 102650/102650 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14568 event pairs, 499 based on Foata normal form. 3/3109 useless extension candidates. Maximal degree in co-relation 20221. Up to 3054 conditions per place. [2024-06-21 17:21:53,873 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 149 selfloop transitions, 23 changer transitions 0/175 dead transitions. [2024-06-21 17:21:53,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 175 transitions, 2034 flow [2024-06-21 17:21:53,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:21:53,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:21:53,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-21 17:21:53,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445 [2024-06-21 17:21:53,877 INFO L175 Difference]: Start difference. First operand has 140 places, 158 transitions, 1610 flow. Second operand 5 states and 89 transitions. [2024-06-21 17:21:53,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 175 transitions, 2034 flow [2024-06-21 17:21:53,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 175 transitions, 1940 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 17:21:53,988 INFO L231 Difference]: Finished difference. Result has 137 places, 161 transitions, 1622 flow [2024-06-21 17:21:53,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1516, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1622, PETRI_PLACES=137, PETRI_TRANSITIONS=161} [2024-06-21 17:21:53,989 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 96 predicate places. [2024-06-21 17:21:53,989 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 161 transitions, 1622 flow [2024-06-21 17:21:53,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:53,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:53,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:53,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 17:21:53,989 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)] === [2024-06-21 17:21:53,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:53,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1364048324, now seen corresponding path program 1 times [2024-06-21 17:21:53,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:53,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529606945] [2024-06-21 17:21:53,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:53,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:53,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:54,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:54,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:54,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529606945] [2024-06-21 17:21:54,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529606945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:54,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:54,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:54,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425564524] [2024-06-21 17:21:54,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:54,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:54,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:54,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:54,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:54,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:54,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 161 transitions, 1622 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-21 17:21:54,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:54,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:54,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:55,319 INFO L124 PetriNetUnfolderBase]: 2086/3137 cut-off events. [2024-06-21 17:21:55,319 INFO L125 PetriNetUnfolderBase]: For 109239/109260 co-relation queries the response was YES. [2024-06-21 17:21:55,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20824 conditions, 3137 events. 2086/3137 cut-off events. For 109239/109260 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14732 event pairs, 349 based on Foata normal form. 18/3149 useless extension candidates. Maximal degree in co-relation 20757. Up to 2989 conditions per place. [2024-06-21 17:21:55,339 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 168 selfloop transitions, 21 changer transitions 0/192 dead transitions. [2024-06-21 17:21:55,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 192 transitions, 2130 flow [2024-06-21 17:21:55,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:21:55,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:21:55,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-21 17:21:55,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 17:21:55,340 INFO L175 Difference]: Start difference. First operand has 137 places, 161 transitions, 1622 flow. Second operand 8 states and 128 transitions. [2024-06-21 17:21:55,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 192 transitions, 2130 flow [2024-06-21 17:21:55,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 192 transitions, 2082 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 17:21:55,439 INFO L231 Difference]: Finished difference. Result has 142 places, 163 transitions, 1671 flow [2024-06-21 17:21:55,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1574, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1671, PETRI_PLACES=142, PETRI_TRANSITIONS=163} [2024-06-21 17:21:55,440 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 101 predicate places. [2024-06-21 17:21:55,440 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 163 transitions, 1671 flow [2024-06-21 17:21:55,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-21 17:21:55,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:55,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:55,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 17:21:55,440 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:55,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:55,441 INFO L85 PathProgramCache]: Analyzing trace with hash -799623040, now seen corresponding path program 2 times [2024-06-21 17:21:55,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:55,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183061857] [2024-06-21 17:21:55,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:55,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:55,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:56,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:56,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:56,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183061857] [2024-06-21 17:21:56,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183061857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:56,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:56,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:56,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760546943] [2024-06-21 17:21:56,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:56,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:56,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:56,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:56,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:56,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:56,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 163 transitions, 1671 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-21 17:21:56,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:56,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:56,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:56,783 INFO L124 PetriNetUnfolderBase]: 2128/3203 cut-off events. [2024-06-21 17:21:56,783 INFO L125 PetriNetUnfolderBase]: For 119253/119274 co-relation queries the response was YES. [2024-06-21 17:21:56,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21775 conditions, 3203 events. 2128/3203 cut-off events. For 119253/119274 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 15204 event pairs, 462 based on Foata normal form. 18/3215 useless extension candidates. Maximal degree in co-relation 21707. Up to 2997 conditions per place. [2024-06-21 17:21:56,807 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 164 selfloop transitions, 31 changer transitions 0/198 dead transitions. [2024-06-21 17:21:56,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 198 transitions, 2373 flow [2024-06-21 17:21:56,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:21:56,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:21:56,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 17:21:56,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-21 17:21:56,809 INFO L175 Difference]: Start difference. First operand has 142 places, 163 transitions, 1671 flow. Second operand 8 states and 133 transitions. [2024-06-21 17:21:56,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 198 transitions, 2373 flow [2024-06-21 17:21:56,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 198 transitions, 2294 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 17:21:56,916 INFO L231 Difference]: Finished difference. Result has 144 places, 167 transitions, 1761 flow [2024-06-21 17:21:56,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1592, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1761, PETRI_PLACES=144, PETRI_TRANSITIONS=167} [2024-06-21 17:21:56,916 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 103 predicate places. [2024-06-21 17:21:56,916 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 167 transitions, 1761 flow [2024-06-21 17:21:56,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-21 17:21:56,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:56,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:56,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 17:21:56,917 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)] === [2024-06-21 17:21:56,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:56,917 INFO L85 PathProgramCache]: Analyzing trace with hash -799619165, now seen corresponding path program 1 times [2024-06-21 17:21:56,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:56,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074481769] [2024-06-21 17:21:56,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:56,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:56,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:57,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:57,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:57,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074481769] [2024-06-21 17:21:57,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074481769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:57,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:57,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:57,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636418466] [2024-06-21 17:21:57,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:57,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:57,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:57,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:57,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:57,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:57,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 167 transitions, 1761 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-21 17:21:57,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:57,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:57,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:58,391 INFO L124 PetriNetUnfolderBase]: 2123/3196 cut-off events. [2024-06-21 17:21:58,391 INFO L125 PetriNetUnfolderBase]: For 125643/125664 co-relation queries the response was YES. [2024-06-21 17:21:58,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21979 conditions, 3196 events. 2123/3196 cut-off events. For 125643/125664 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 15138 event pairs, 459 based on Foata normal form. 16/3206 useless extension candidates. Maximal degree in co-relation 21910. Up to 3033 conditions per place. [2024-06-21 17:21:58,414 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 160 selfloop transitions, 33 changer transitions 0/196 dead transitions. [2024-06-21 17:21:58,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 196 transitions, 2239 flow [2024-06-21 17:21:58,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:21:58,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:21:58,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 17:21:58,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409375 [2024-06-21 17:21:58,415 INFO L175 Difference]: Start difference. First operand has 144 places, 167 transitions, 1761 flow. Second operand 8 states and 131 transitions. [2024-06-21 17:21:58,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 196 transitions, 2239 flow [2024-06-21 17:21:58,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 196 transitions, 2143 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-21 17:21:58,566 INFO L231 Difference]: Finished difference. Result has 148 places, 167 transitions, 1743 flow [2024-06-21 17:21:58,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1665, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1743, PETRI_PLACES=148, PETRI_TRANSITIONS=167} [2024-06-21 17:21:58,567 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 107 predicate places. [2024-06-21 17:21:58,567 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 167 transitions, 1743 flow [2024-06-21 17:21:58,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-21 17:21:58,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:58,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:58,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 17:21:58,568 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)] === [2024-06-21 17:21:58,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:58,568 INFO L85 PathProgramCache]: Analyzing trace with hash -799619320, now seen corresponding path program 3 times [2024-06-21 17:21:58,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:58,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736614313] [2024-06-21 17:21:58,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:58,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:58,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:59,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:59,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:59,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736614313] [2024-06-21 17:21:59,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736614313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:59,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:59,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:59,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305651483] [2024-06-21 17:21:59,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:59,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:59,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:59,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:59,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:59,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:59,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 167 transitions, 1743 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-21 17:21:59,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:59,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:59,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:00,020 INFO L124 PetriNetUnfolderBase]: 2115/3184 cut-off events. [2024-06-21 17:22:00,021 INFO L125 PetriNetUnfolderBase]: For 130011/130032 co-relation queries the response was YES. [2024-06-21 17:22:00,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21938 conditions, 3184 events. 2115/3184 cut-off events. For 130011/130032 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 15080 event pairs, 457 based on Foata normal form. 18/3196 useless extension candidates. Maximal degree in co-relation 21867. Up to 3030 conditions per place. [2024-06-21 17:22:00,041 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 164 selfloop transitions, 29 changer transitions 0/196 dead transitions. [2024-06-21 17:22:00,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 196 transitions, 2219 flow [2024-06-21 17:22:00,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:22:00,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:22:00,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 17:22:00,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-21 17:22:00,043 INFO L175 Difference]: Start difference. First operand has 148 places, 167 transitions, 1743 flow. Second operand 8 states and 130 transitions. [2024-06-21 17:22:00,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 196 transitions, 2219 flow [2024-06-21 17:22:00,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 196 transitions, 2042 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-21 17:22:00,159 INFO L231 Difference]: Finished difference. Result has 148 places, 167 transitions, 1632 flow [2024-06-21 17:22:00,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1566, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1632, PETRI_PLACES=148, PETRI_TRANSITIONS=167} [2024-06-21 17:22:00,159 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 107 predicate places. [2024-06-21 17:22:00,160 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 167 transitions, 1632 flow [2024-06-21 17:22:00,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-21 17:22:00,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:00,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:00,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 17:22:00,160 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)] === [2024-06-21 17:22:00,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:00,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1782296414, now seen corresponding path program 1 times [2024-06-21 17:22:00,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:00,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895486604] [2024-06-21 17:22:00,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:00,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:00,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:00,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:00,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:00,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895486604] [2024-06-21 17:22:00,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895486604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:00,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:00,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:22:00,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167502162] [2024-06-21 17:22:00,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:00,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:22:00,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:00,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:22:00,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:22:00,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:22:00,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 167 transitions, 1632 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-21 17:22:00,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:00,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:22:00,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:01,577 INFO L124 PetriNetUnfolderBase]: 2207/3338 cut-off events. [2024-06-21 17:22:01,577 INFO L125 PetriNetUnfolderBase]: For 140954/140981 co-relation queries the response was YES. [2024-06-21 17:22:01,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22523 conditions, 3338 events. 2207/3338 cut-off events. For 140954/140981 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 16119 event pairs, 475 based on Foata normal form. 38/3368 useless extension candidates. Maximal degree in co-relation 22451. Up to 3062 conditions per place. [2024-06-21 17:22:01,601 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 177 selfloop transitions, 28 changer transitions 0/208 dead transitions. [2024-06-21 17:22:01,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 208 transitions, 2220 flow [2024-06-21 17:22:01,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:22:01,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:22:01,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-21 17:22:01,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41388888888888886 [2024-06-21 17:22:01,602 INFO L175 Difference]: Start difference. First operand has 148 places, 167 transitions, 1632 flow. Second operand 9 states and 149 transitions. [2024-06-21 17:22:01,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 208 transitions, 2220 flow [2024-06-21 17:22:01,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 208 transitions, 2150 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 17:22:01,728 INFO L231 Difference]: Finished difference. Result has 150 places, 170 transitions, 1684 flow [2024-06-21 17:22:01,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1568, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1684, PETRI_PLACES=150, PETRI_TRANSITIONS=170} [2024-06-21 17:22:01,729 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 109 predicate places. [2024-06-21 17:22:01,729 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 170 transitions, 1684 flow [2024-06-21 17:22:01,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-21 17:22:01,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:01,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:01,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 17:22:01,729 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:01,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:01,730 INFO L85 PathProgramCache]: Analyzing trace with hash 597789520, now seen corresponding path program 1 times [2024-06-21 17:22:01,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:01,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837830690] [2024-06-21 17:22:01,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:01,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:01,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:02,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:02,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:02,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837830690] [2024-06-21 17:22:02,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837830690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:02,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:02,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:22:02,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066818962] [2024-06-21 17:22:02,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:02,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:22:02,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:02,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:22:02,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:22:02,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:22:02,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 170 transitions, 1684 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:02,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:02,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:22:02,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:02,890 INFO L124 PetriNetUnfolderBase]: 2217/3348 cut-off events. [2024-06-21 17:22:02,890 INFO L125 PetriNetUnfolderBase]: For 137818/137818 co-relation queries the response was YES. [2024-06-21 17:22:02,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22859 conditions, 3348 events. 2217/3348 cut-off events. For 137818/137818 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 16141 event pairs, 485 based on Foata normal form. 2/3348 useless extension candidates. Maximal degree in co-relation 22786. Up to 3248 conditions per place. [2024-06-21 17:22:02,915 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 169 selfloop transitions, 28 changer transitions 0/200 dead transitions. [2024-06-21 17:22:02,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 200 transitions, 2278 flow [2024-06-21 17:22:02,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:22:02,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:22:02,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 17:22:02,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41785714285714287 [2024-06-21 17:22:02,916 INFO L175 Difference]: Start difference. First operand has 150 places, 170 transitions, 1684 flow. Second operand 7 states and 117 transitions. [2024-06-21 17:22:02,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 200 transitions, 2278 flow [2024-06-21 17:22:03,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 200 transitions, 2208 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 17:22:03,055 INFO L231 Difference]: Finished difference. Result has 150 places, 176 transitions, 1739 flow [2024-06-21 17:22:03,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1614, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1739, PETRI_PLACES=150, PETRI_TRANSITIONS=176} [2024-06-21 17:22:03,056 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 109 predicate places. [2024-06-21 17:22:03,056 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 176 transitions, 1739 flow [2024-06-21 17:22:03,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:03,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:03,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:03,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 17:22:03,057 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)] === [2024-06-21 17:22:03,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:03,057 INFO L85 PathProgramCache]: Analyzing trace with hash 737398510, now seen corresponding path program 2 times [2024-06-21 17:22:03,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:03,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539516196] [2024-06-21 17:22:03,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:03,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:03,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:03,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:03,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:03,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539516196] [2024-06-21 17:22:03,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539516196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:03,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:03,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:22:03,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084373813] [2024-06-21 17:22:03,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:03,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:22:03,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:03,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:22:03,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:22:03,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:22:03,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 176 transitions, 1739 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:03,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:03,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:22:03,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:04,231 INFO L124 PetriNetUnfolderBase]: 2411/3671 cut-off events. [2024-06-21 17:22:04,231 INFO L125 PetriNetUnfolderBase]: For 172280/172289 co-relation queries the response was YES. [2024-06-21 17:22:04,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25807 conditions, 3671 events. 2411/3671 cut-off events. For 172280/172289 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 18265 event pairs, 445 based on Foata normal form. 20/3682 useless extension candidates. Maximal degree in co-relation 25733. Up to 2623 conditions per place. [2024-06-21 17:22:04,259 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 133 selfloop transitions, 79 changer transitions 0/215 dead transitions. [2024-06-21 17:22:04,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 215 transitions, 2519 flow [2024-06-21 17:22:04,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:22:04,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:22:04,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 17:22:04,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-21 17:22:04,260 INFO L175 Difference]: Start difference. First operand has 150 places, 176 transitions, 1739 flow. Second operand 8 states and 145 transitions. [2024-06-21 17:22:04,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 215 transitions, 2519 flow [2024-06-21 17:22:04,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 215 transitions, 2473 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-21 17:22:04,412 INFO L231 Difference]: Finished difference. Result has 155 places, 178 transitions, 1931 flow [2024-06-21 17:22:04,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1693, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1931, PETRI_PLACES=155, PETRI_TRANSITIONS=178} [2024-06-21 17:22:04,412 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 114 predicate places. [2024-06-21 17:22:04,412 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 178 transitions, 1931 flow [2024-06-21 17:22:04,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:04,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:04,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:04,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 17:22:04,413 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:04,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:04,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1797294046, now seen corresponding path program 3 times [2024-06-21 17:22:04,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:04,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529278647] [2024-06-21 17:22:04,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:04,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:04,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:04,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:04,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:04,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529278647] [2024-06-21 17:22:04,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529278647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:04,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:04,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:22:04,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260274927] [2024-06-21 17:22:04,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:04,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:22:04,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:04,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:22:04,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:22:05,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:22:05,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 178 transitions, 1931 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:05,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:05,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:22:05,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:05,692 INFO L124 PetriNetUnfolderBase]: 2503/3823 cut-off events. [2024-06-21 17:22:05,692 INFO L125 PetriNetUnfolderBase]: For 191186/191195 co-relation queries the response was YES. [2024-06-21 17:22:05,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27418 conditions, 3823 events. 2503/3823 cut-off events. For 191186/191195 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 19393 event pairs, 537 based on Foata normal form. 28/3842 useless extension candidates. Maximal degree in co-relation 27342. Up to 3190 conditions per place. [2024-06-21 17:22:05,723 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 132 selfloop transitions, 76 changer transitions 0/211 dead transitions. [2024-06-21 17:22:05,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 211 transitions, 2511 flow [2024-06-21 17:22:05,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:22:05,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:22:05,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 17:22:05,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-21 17:22:05,724 INFO L175 Difference]: Start difference. First operand has 155 places, 178 transitions, 1931 flow. Second operand 8 states and 141 transitions. [2024-06-21 17:22:05,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 211 transitions, 2511 flow [2024-06-21 17:22:05,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 211 transitions, 2398 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 17:22:05,881 INFO L231 Difference]: Finished difference. Result has 159 places, 180 transitions, 2039 flow [2024-06-21 17:22:05,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1818, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2039, PETRI_PLACES=159, PETRI_TRANSITIONS=180} [2024-06-21 17:22:05,882 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 118 predicate places. [2024-06-21 17:22:05,882 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 180 transitions, 2039 flow [2024-06-21 17:22:05,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:05,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:05,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:05,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 17:22:05,883 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:05,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:05,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1791579754, now seen corresponding path program 4 times [2024-06-21 17:22:05,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:05,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590578714] [2024-06-21 17:22:05,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:05,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:05,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:06,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:06,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:06,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590578714] [2024-06-21 17:22:06,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590578714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:06,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:06,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:22:06,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686557925] [2024-06-21 17:22:06,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:06,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:22:06,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:06,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:22:06,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:22:06,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:22:06,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 180 transitions, 2039 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-21 17:22:06,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:06,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:22:06,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:07,529 INFO L124 PetriNetUnfolderBase]: 2495/3811 cut-off events. [2024-06-21 17:22:07,529 INFO L125 PetriNetUnfolderBase]: For 183881/183890 co-relation queries the response was YES. [2024-06-21 17:22:07,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27695 conditions, 3811 events. 2495/3811 cut-off events. For 183881/183890 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 19378 event pairs, 526 based on Foata normal form. 8/3810 useless extension candidates. Maximal degree in co-relation 27617. Up to 3298 conditions per place. [2024-06-21 17:22:07,563 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 131 selfloop transitions, 75 changer transitions 0/209 dead transitions. [2024-06-21 17:22:07,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 209 transitions, 2595 flow [2024-06-21 17:22:07,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:22:07,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:22:07,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 17:22:07,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-21 17:22:07,564 INFO L175 Difference]: Start difference. First operand has 159 places, 180 transitions, 2039 flow. Second operand 8 states and 135 transitions. [2024-06-21 17:22:07,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 209 transitions, 2595 flow [2024-06-21 17:22:07,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 209 transitions, 2408 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 17:22:07,761 INFO L231 Difference]: Finished difference. Result has 161 places, 182 transitions, 2073 flow [2024-06-21 17:22:07,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1852, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2073, PETRI_PLACES=161, PETRI_TRANSITIONS=182} [2024-06-21 17:22:07,761 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 120 predicate places. [2024-06-21 17:22:07,761 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 182 transitions, 2073 flow [2024-06-21 17:22:07,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-21 17:22:07,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:07,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:07,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 17:22:07,762 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:07,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:07,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1791729856, now seen corresponding path program 4 times [2024-06-21 17:22:07,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:07,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790360957] [2024-06-21 17:22:07,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:07,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:07,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:08,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:08,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:08,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790360957] [2024-06-21 17:22:08,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790360957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:08,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:08,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:22:08,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651275345] [2024-06-21 17:22:08,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:08,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:22:08,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:08,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:22:08,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:22:08,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:22:08,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 182 transitions, 2073 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-21 17:22:08,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:08,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:22:08,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:09,371 INFO L124 PetriNetUnfolderBase]: 2570/3936 cut-off events. [2024-06-21 17:22:09,371 INFO L125 PetriNetUnfolderBase]: For 204504/204513 co-relation queries the response was YES. [2024-06-21 17:22:09,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28459 conditions, 3936 events. 2570/3936 cut-off events. For 204504/204513 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 20279 event pairs, 565 based on Foata normal form. 24/3951 useless extension candidates. Maximal degree in co-relation 28380. Up to 3458 conditions per place. [2024-06-21 17:22:09,408 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 163 selfloop transitions, 53 changer transitions 0/219 dead transitions. [2024-06-21 17:22:09,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 219 transitions, 2671 flow [2024-06-21 17:22:09,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:22:09,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:22:09,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 17:22:09,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-21 17:22:09,409 INFO L175 Difference]: Start difference. First operand has 161 places, 182 transitions, 2073 flow. Second operand 9 states and 152 transitions. [2024-06-21 17:22:09,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 219 transitions, 2671 flow [2024-06-21 17:22:09,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 219 transitions, 2470 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 17:22:09,634 INFO L231 Difference]: Finished difference. Result has 164 places, 183 transitions, 2032 flow [2024-06-21 17:22:09,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1872, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2032, PETRI_PLACES=164, PETRI_TRANSITIONS=183} [2024-06-21 17:22:09,634 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 123 predicate places. [2024-06-21 17:22:09,634 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 183 transitions, 2032 flow [2024-06-21 17:22:09,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-21 17:22:09,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:09,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:09,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 17:22:09,635 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:09,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:09,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1791576034, now seen corresponding path program 5 times [2024-06-21 17:22:09,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:09,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272706743] [2024-06-21 17:22:09,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:09,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:09,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:10,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:10,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:10,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272706743] [2024-06-21 17:22:10,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272706743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:10,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:10,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:22:10,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340261437] [2024-06-21 17:22:10,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:10,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:22:10,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:10,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:22:10,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:22:10,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:22:10,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 183 transitions, 2032 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-21 17:22:10,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:10,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:22:10,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:11,120 INFO L124 PetriNetUnfolderBase]: 2562/3924 cut-off events. [2024-06-21 17:22:11,120 INFO L125 PetriNetUnfolderBase]: For 198409/198418 co-relation queries the response was YES. [2024-06-21 17:22:11,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28231 conditions, 3924 events. 2562/3924 cut-off events. For 198409/198418 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 20150 event pairs, 548 based on Foata normal form. 8/3923 useless extension candidates. Maximal degree in co-relation 28151. Up to 3066 conditions per place. [2024-06-21 17:22:11,154 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 131 selfloop transitions, 82 changer transitions 0/216 dead transitions. [2024-06-21 17:22:11,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 216 transitions, 2624 flow [2024-06-21 17:22:11,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:22:11,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:22:11,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 17:22:11,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-21 17:22:11,158 INFO L175 Difference]: Start difference. First operand has 164 places, 183 transitions, 2032 flow. Second operand 8 states and 139 transitions. [2024-06-21 17:22:11,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 216 transitions, 2624 flow [2024-06-21 17:22:11,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 216 transitions, 2510 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 17:22:11,379 INFO L231 Difference]: Finished difference. Result has 166 places, 185 transitions, 2154 flow [2024-06-21 17:22:11,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1918, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2154, PETRI_PLACES=166, PETRI_TRANSITIONS=185} [2024-06-21 17:22:11,380 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2024-06-21 17:22:11,380 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 185 transitions, 2154 flow [2024-06-21 17:22:11,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-21 17:22:11,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:11,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:11,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 17:22:11,381 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:11,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:11,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1428356054, now seen corresponding path program 5 times [2024-06-21 17:22:11,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:11,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88855475] [2024-06-21 17:22:11,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:11,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:11,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:12,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:12,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:12,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88855475] [2024-06-21 17:22:12,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88855475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:12,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:12,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:22:12,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658522448] [2024-06-21 17:22:12,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:12,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:22:12,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:12,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:22:12,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:22:12,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:22:12,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 185 transitions, 2154 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-21 17:22:12,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:12,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:22:12,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:13,106 INFO L124 PetriNetUnfolderBase]: 2587/3971 cut-off events. [2024-06-21 17:22:13,106 INFO L125 PetriNetUnfolderBase]: For 213038/213047 co-relation queries the response was YES. [2024-06-21 17:22:13,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28477 conditions, 3971 events. 2587/3971 cut-off events. For 213038/213047 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 20499 event pairs, 487 based on Foata normal form. 24/3986 useless extension candidates. Maximal degree in co-relation 28396. Up to 2904 conditions per place. [2024-06-21 17:22:13,142 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 142 selfloop transitions, 77 changer transitions 0/222 dead transitions. [2024-06-21 17:22:13,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 222 transitions, 2758 flow [2024-06-21 17:22:13,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:22:13,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:22:13,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 17:22:13,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361111111111111 [2024-06-21 17:22:13,144 INFO L175 Difference]: Start difference. First operand has 166 places, 185 transitions, 2154 flow. Second operand 9 states and 157 transitions. [2024-06-21 17:22:13,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 222 transitions, 2758 flow [2024-06-21 17:22:13,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 222 transitions, 2542 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 17:22:13,384 INFO L231 Difference]: Finished difference. Result has 169 places, 186 transitions, 2160 flow [2024-06-21 17:22:13,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1938, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2160, PETRI_PLACES=169, PETRI_TRANSITIONS=186} [2024-06-21 17:22:13,384 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 128 predicate places. [2024-06-21 17:22:13,384 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 186 transitions, 2160 flow [2024-06-21 17:22:13,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-21 17:22:13,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:13,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:13,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 17:22:13,385 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:13,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:13,385 INFO L85 PathProgramCache]: Analyzing trace with hash -536000528, now seen corresponding path program 1 times [2024-06-21 17:22:13,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:13,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436852314] [2024-06-21 17:22:13,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:13,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:13,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:13,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:13,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:13,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436852314] [2024-06-21 17:22:13,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436852314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:13,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:13,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:22:13,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105739667] [2024-06-21 17:22:13,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:13,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:22:13,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:13,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:22:13,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:22:13,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:22:13,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 186 transitions, 2160 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:13,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:13,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:22:13,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:14,584 INFO L124 PetriNetUnfolderBase]: 2597/3980 cut-off events. [2024-06-21 17:22:14,584 INFO L125 PetriNetUnfolderBase]: For 206635/206635 co-relation queries the response was YES. [2024-06-21 17:22:14,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28785 conditions, 3980 events. 2597/3980 cut-off events. For 206635/206635 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 20631 event pairs, 595 based on Foata normal form. 2/3980 useless extension candidates. Maximal degree in co-relation 28703. Up to 3906 conditions per place. [2024-06-21 17:22:14,616 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 176 selfloop transitions, 31 changer transitions 0/210 dead transitions. [2024-06-21 17:22:14,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 210 transitions, 2800 flow [2024-06-21 17:22:14,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:22:14,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:22:14,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 17:22:14,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-21 17:22:14,620 INFO L175 Difference]: Start difference. First operand has 169 places, 186 transitions, 2160 flow. Second operand 7 states and 113 transitions. [2024-06-21 17:22:14,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 210 transitions, 2800 flow [2024-06-21 17:22:14,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 210 transitions, 2595 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-21 17:22:14,921 INFO L231 Difference]: Finished difference. Result has 168 places, 192 transitions, 2119 flow [2024-06-21 17:22:14,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1957, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2119, PETRI_PLACES=168, PETRI_TRANSITIONS=192} [2024-06-21 17:22:14,921 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 127 predicate places. [2024-06-21 17:22:14,921 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 192 transitions, 2119 flow [2024-06-21 17:22:14,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:14,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:14,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:14,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 17:22:14,921 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:14,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:14,922 INFO L85 PathProgramCache]: Analyzing trace with hash 254359026, now seen corresponding path program 2 times [2024-06-21 17:22:14,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:14,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122602182] [2024-06-21 17:22:14,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:14,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:14,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:15,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:15,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:15,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122602182] [2024-06-21 17:22:15,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122602182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:15,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:15,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:22:15,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411292223] [2024-06-21 17:22:15,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:15,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:22:15,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:15,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:22:15,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:22:15,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:22:15,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 192 transitions, 2119 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:15,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:15,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:22:15,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:16,188 INFO L124 PetriNetUnfolderBase]: 2607/3994 cut-off events. [2024-06-21 17:22:16,188 INFO L125 PetriNetUnfolderBase]: For 203653/203653 co-relation queries the response was YES. [2024-06-21 17:22:16,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28427 conditions, 3994 events. 2607/3994 cut-off events. For 203653/203653 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 20672 event pairs, 593 based on Foata normal form. 2/3994 useless extension candidates. Maximal degree in co-relation 28346. Up to 3890 conditions per place. [2024-06-21 17:22:16,216 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 182 selfloop transitions, 30 changer transitions 0/215 dead transitions. [2024-06-21 17:22:16,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 215 transitions, 2719 flow [2024-06-21 17:22:16,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:22:16,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:22:16,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 17:22:16,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-21 17:22:16,217 INFO L175 Difference]: Start difference. First operand has 168 places, 192 transitions, 2119 flow. Second operand 7 states and 113 transitions. [2024-06-21 17:22:16,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 215 transitions, 2719 flow [2024-06-21 17:22:16,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 215 transitions, 2662 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 17:22:16,480 INFO L231 Difference]: Finished difference. Result has 172 places, 195 transitions, 2158 flow [2024-06-21 17:22:16,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2062, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2158, PETRI_PLACES=172, PETRI_TRANSITIONS=195} [2024-06-21 17:22:16,480 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 131 predicate places. [2024-06-21 17:22:16,480 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 195 transitions, 2158 flow [2024-06-21 17:22:16,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:16,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:16,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:16,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 17:22:16,481 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)] === [2024-06-21 17:22:16,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:16,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1917463150, now seen corresponding path program 6 times [2024-06-21 17:22:16,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:16,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227281219] [2024-06-21 17:22:16,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:16,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:16,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:17,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:17,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:17,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227281219] [2024-06-21 17:22:17,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227281219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:17,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:17,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:22:17,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250188681] [2024-06-21 17:22:17,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:17,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:22:17,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:17,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:22:17,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:22:17,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:22:17,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 195 transitions, 2158 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:17,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:17,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:22:17,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:17,841 INFO L124 PetriNetUnfolderBase]: 2682/4124 cut-off events. [2024-06-21 17:22:17,842 INFO L125 PetriNetUnfolderBase]: For 230199/230208 co-relation queries the response was YES. [2024-06-21 17:22:17,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29394 conditions, 4124 events. 2682/4124 cut-off events. For 230199/230208 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 21603 event pairs, 576 based on Foata normal form. 24/4139 useless extension candidates. Maximal degree in co-relation 29311. Up to 3637 conditions per place. [2024-06-21 17:22:17,938 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 170 selfloop transitions, 54 changer transitions 0/227 dead transitions. [2024-06-21 17:22:17,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 227 transitions, 2754 flow [2024-06-21 17:22:17,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:22:17,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:22:17,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 17:22:17,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-21 17:22:17,939 INFO L175 Difference]: Start difference. First operand has 172 places, 195 transitions, 2158 flow. Second operand 8 states and 139 transitions. [2024-06-21 17:22:17,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 227 transitions, 2754 flow [2024-06-21 17:22:18,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 227 transitions, 2696 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 17:22:18,178 INFO L231 Difference]: Finished difference. Result has 176 places, 196 transitions, 2260 flow [2024-06-21 17:22:18,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2100, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2260, PETRI_PLACES=176, PETRI_TRANSITIONS=196} [2024-06-21 17:22:18,179 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 135 predicate places. [2024-06-21 17:22:18,179 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 196 transitions, 2260 flow [2024-06-21 17:22:18,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:18,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:18,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:18,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 17:22:18,179 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)] === [2024-06-21 17:22:18,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:18,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1917672400, now seen corresponding path program 7 times [2024-06-21 17:22:18,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:18,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806973685] [2024-06-21 17:22:18,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:18,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:18,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:18,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:18,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:18,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806973685] [2024-06-21 17:22:18,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806973685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:18,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:18,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:22:18,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655572628] [2024-06-21 17:22:18,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:18,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:22:18,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:18,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:22:18,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:22:18,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:22:18,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 196 transitions, 2260 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:18,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:18,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:22:18,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:19,492 INFO L124 PetriNetUnfolderBase]: 2801/4325 cut-off events. [2024-06-21 17:22:19,492 INFO L125 PetriNetUnfolderBase]: For 252794/252803 co-relation queries the response was YES. [2024-06-21 17:22:19,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31543 conditions, 4325 events. 2801/4325 cut-off events. For 252794/252803 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 23023 event pairs, 610 based on Foata normal form. 20/4336 useless extension candidates. Maximal degree in co-relation 31459. Up to 3321 conditions per place. [2024-06-21 17:22:19,535 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 156 selfloop transitions, 75 changer transitions 0/234 dead transitions. [2024-06-21 17:22:19,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 234 transitions, 3100 flow [2024-06-21 17:22:19,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:22:19,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:22:19,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 17:22:19,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-21 17:22:19,536 INFO L175 Difference]: Start difference. First operand has 176 places, 196 transitions, 2260 flow. Second operand 8 states and 145 transitions. [2024-06-21 17:22:19,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 234 transitions, 3100 flow [2024-06-21 17:22:19,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 234 transitions, 2974 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 17:22:19,836 INFO L231 Difference]: Finished difference. Result has 178 places, 198 transitions, 2377 flow [2024-06-21 17:22:19,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2134, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2377, PETRI_PLACES=178, PETRI_TRANSITIONS=198} [2024-06-21 17:22:19,836 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 137 predicate places. [2024-06-21 17:22:19,837 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 198 transitions, 2377 flow [2024-06-21 17:22:19,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:19,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:19,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:19,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 17:22:19,837 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)] === [2024-06-21 17:22:19,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:19,837 INFO L85 PathProgramCache]: Analyzing trace with hash -2111597616, now seen corresponding path program 8 times [2024-06-21 17:22:19,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:19,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975128194] [2024-06-21 17:22:19,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:19,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:19,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:20,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:20,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:20,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975128194] [2024-06-21 17:22:20,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975128194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:20,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:20,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:22:20,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152278523] [2024-06-21 17:22:20,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:20,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:22:20,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:20,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:22:20,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:22:20,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:22:20,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 198 transitions, 2377 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:20,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:20,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:22:20,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:21,126 INFO L124 PetriNetUnfolderBase]: 2870/4448 cut-off events. [2024-06-21 17:22:21,126 INFO L125 PetriNetUnfolderBase]: For 269860/269869 co-relation queries the response was YES. [2024-06-21 17:22:21,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32654 conditions, 4448 events. 2870/4448 cut-off events. For 269860/269869 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 23932 event pairs, 576 based on Foata normal form. 20/4459 useless extension candidates. Maximal degree in co-relation 32569. Up to 2312 conditions per place. [2024-06-21 17:22:21,169 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 147 selfloop transitions, 86 changer transitions 0/236 dead transitions. [2024-06-21 17:22:21,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 236 transitions, 3227 flow [2024-06-21 17:22:21,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:22:21,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:22:21,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 17:22:21,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-06-21 17:22:21,170 INFO L175 Difference]: Start difference. First operand has 178 places, 198 transitions, 2377 flow. Second operand 8 states and 142 transitions. [2024-06-21 17:22:21,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 236 transitions, 3227 flow [2024-06-21 17:22:21,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 236 transitions, 3112 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-21 17:22:21,523 INFO L231 Difference]: Finished difference. Result has 182 places, 200 transitions, 2530 flow [2024-06-21 17:22:21,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2262, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2530, PETRI_PLACES=182, PETRI_TRANSITIONS=200} [2024-06-21 17:22:21,524 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 141 predicate places. [2024-06-21 17:22:21,524 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 200 transitions, 2530 flow [2024-06-21 17:22:21,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:21,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:21,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:21,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 17:22:21,524 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:21,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:21,525 INFO L85 PathProgramCache]: Analyzing trace with hash 264536016, now seen corresponding path program 3 times [2024-06-21 17:22:21,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:21,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039209019] [2024-06-21 17:22:21,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:21,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:21,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:21,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:21,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:21,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039209019] [2024-06-21 17:22:21,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039209019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:21,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:21,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:22:21,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097439960] [2024-06-21 17:22:21,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:21,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:22:21,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:21,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:22:21,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:22:22,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:22:22,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 200 transitions, 2530 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:22,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:22,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:22:22,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:22,764 INFO L124 PetriNetUnfolderBase]: 2884/4463 cut-off events. [2024-06-21 17:22:22,764 INFO L125 PetriNetUnfolderBase]: For 267215/267215 co-relation queries the response was YES. [2024-06-21 17:22:22,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33168 conditions, 4463 events. 2884/4463 cut-off events. For 267215/267215 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 24144 event pairs, 694 based on Foata normal form. 6/4467 useless extension candidates. Maximal degree in co-relation 33081. Up to 4351 conditions per place. [2024-06-21 17:22:22,804 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 189 selfloop transitions, 34 changer transitions 0/226 dead transitions. [2024-06-21 17:22:22,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 226 transitions, 3090 flow [2024-06-21 17:22:22,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:22:22,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:22:22,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-21 17:22:22,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 17:22:22,805 INFO L175 Difference]: Start difference. First operand has 182 places, 200 transitions, 2530 flow. Second operand 6 states and 110 transitions. [2024-06-21 17:22:22,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 226 transitions, 3090 flow [2024-06-21 17:22:23,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 226 transitions, 2970 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-21 17:22:23,243 INFO L231 Difference]: Finished difference. Result has 184 places, 203 transitions, 2541 flow [2024-06-21 17:22:23,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2410, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2541, PETRI_PLACES=184, PETRI_TRANSITIONS=203} [2024-06-21 17:22:23,243 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 143 predicate places. [2024-06-21 17:22:23,243 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 203 transitions, 2541 flow [2024-06-21 17:22:23,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:23,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:23,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:23,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 17:22:23,244 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:23,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:23,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1381001468, now seen corresponding path program 2 times [2024-06-21 17:22:23,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:23,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751869221] [2024-06-21 17:22:23,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:23,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:23,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:23,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:23,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:23,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751869221] [2024-06-21 17:22:23,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751869221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:23,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:23,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:22:23,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696598206] [2024-06-21 17:22:23,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:23,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:22:23,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:23,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:22:23,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:22:23,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:22:23,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 203 transitions, 2541 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:23,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:23,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:22:23,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:24,469 INFO L124 PetriNetUnfolderBase]: 2878/4455 cut-off events. [2024-06-21 17:22:24,469 INFO L125 PetriNetUnfolderBase]: For 265232/265232 co-relation queries the response was YES. [2024-06-21 17:22:24,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33350 conditions, 4455 events. 2878/4455 cut-off events. For 265232/265232 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 24072 event pairs, 693 based on Foata normal form. 2/4455 useless extension candidates. Maximal degree in co-relation 33261. Up to 4395 conditions per place. [2024-06-21 17:22:24,511 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 190 selfloop transitions, 26 changer transitions 0/219 dead transitions. [2024-06-21 17:22:24,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 219 transitions, 3023 flow [2024-06-21 17:22:24,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:22:24,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:22:24,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-21 17:22:24,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42083333333333334 [2024-06-21 17:22:24,513 INFO L175 Difference]: Start difference. First operand has 184 places, 203 transitions, 2541 flow. Second operand 6 states and 101 transitions. [2024-06-21 17:22:24,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 219 transitions, 3023 flow [2024-06-21 17:22:24,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 219 transitions, 2932 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-21 17:22:24,911 INFO L231 Difference]: Finished difference. Result has 186 places, 203 transitions, 2508 flow [2024-06-21 17:22:24,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2450, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2508, PETRI_PLACES=186, PETRI_TRANSITIONS=203} [2024-06-21 17:22:24,912 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 145 predicate places. [2024-06-21 17:22:24,912 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 203 transitions, 2508 flow [2024-06-21 17:22:24,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:24,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:24,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:24,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 17:22:24,912 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:24,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:24,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1962599474, now seen corresponding path program 1 times [2024-06-21 17:22:24,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:24,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118952750] [2024-06-21 17:22:24,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:24,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:24,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:25,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:25,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:25,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118952750] [2024-06-21 17:22:25,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118952750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:25,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:25,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:22:25,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010568028] [2024-06-21 17:22:25,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:25,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:22:25,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:25,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:22:25,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:22:25,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:22:25,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 203 transitions, 2508 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:25,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:25,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:22:25,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:26,087 INFO L124 PetriNetUnfolderBase]: 2896/4482 cut-off events. [2024-06-21 17:22:26,088 INFO L125 PetriNetUnfolderBase]: For 274029/274050 co-relation queries the response was YES. [2024-06-21 17:22:26,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33692 conditions, 4482 events. 2896/4482 cut-off events. For 274029/274050 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 24199 event pairs, 695 based on Foata normal form. 16/4492 useless extension candidates. Maximal degree in co-relation 33602. Up to 4319 conditions per place. [2024-06-21 17:22:26,129 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 192 selfloop transitions, 40 changer transitions 0/235 dead transitions. [2024-06-21 17:22:26,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 235 transitions, 3428 flow [2024-06-21 17:22:26,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:22:26,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:22:26,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-21 17:22:26,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 17:22:26,130 INFO L175 Difference]: Start difference. First operand has 186 places, 203 transitions, 2508 flow. Second operand 7 states and 115 transitions. [2024-06-21 17:22:26,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 235 transitions, 3428 flow [2024-06-21 17:22:26,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 235 transitions, 3342 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 17:22:26,598 INFO L231 Difference]: Finished difference. Result has 189 places, 216 transitions, 2749 flow [2024-06-21 17:22:26,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2422, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2749, PETRI_PLACES=189, PETRI_TRANSITIONS=216} [2024-06-21 17:22:26,599 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 148 predicate places. [2024-06-21 17:22:26,599 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 216 transitions, 2749 flow [2024-06-21 17:22:26,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:26,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:26,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:26,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 17:22:26,599 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:26,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:26,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1962719444, now seen corresponding path program 2 times [2024-06-21 17:22:26,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:26,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888881619] [2024-06-21 17:22:26,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:26,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:26,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:27,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:27,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:27,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888881619] [2024-06-21 17:22:27,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888881619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:27,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:27,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:22:27,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255425627] [2024-06-21 17:22:27,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:27,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:22:27,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:27,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:22:27,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:22:27,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:22:27,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 216 transitions, 2749 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:27,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:27,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:22:27,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:27,915 INFO L124 PetriNetUnfolderBase]: 2995/4619 cut-off events. [2024-06-21 17:22:27,915 INFO L125 PetriNetUnfolderBase]: For 300440/300440 co-relation queries the response was YES. [2024-06-21 17:22:27,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35844 conditions, 4619 events. 2995/4619 cut-off events. For 300440/300440 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 24998 event pairs, 694 based on Foata normal form. 6/4623 useless extension candidates. Maximal degree in co-relation 35752. Up to 4513 conditions per place. [2024-06-21 17:22:27,957 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 218 selfloop transitions, 36 changer transitions 0/257 dead transitions. [2024-06-21 17:22:27,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 257 transitions, 3775 flow [2024-06-21 17:22:27,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:22:27,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:22:27,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 17:22:27,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-21 17:22:27,958 INFO L175 Difference]: Start difference. First operand has 189 places, 216 transitions, 2749 flow. Second operand 8 states and 127 transitions. [2024-06-21 17:22:27,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 257 transitions, 3775 flow [2024-06-21 17:22:28,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 257 transitions, 3635 flow, removed 62 selfloop flow, removed 2 redundant places. [2024-06-21 17:22:28,533 INFO L231 Difference]: Finished difference. Result has 196 places, 236 transitions, 3084 flow [2024-06-21 17:22:28,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2647, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3084, PETRI_PLACES=196, PETRI_TRANSITIONS=236} [2024-06-21 17:22:28,534 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 155 predicate places. [2024-06-21 17:22:28,534 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 236 transitions, 3084 flow [2024-06-21 17:22:28,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:28,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:28,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:28,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 17:22:28,535 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:28,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:28,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1380817142, now seen corresponding path program 3 times [2024-06-21 17:22:28,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:28,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985754169] [2024-06-21 17:22:28,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:28,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:28,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:28,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:28,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:28,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985754169] [2024-06-21 17:22:28,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985754169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:28,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:28,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:22:28,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713350625] [2024-06-21 17:22:28,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:28,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:22:28,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:28,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:22:28,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:22:29,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:22:29,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 236 transitions, 3084 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:29,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:29,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:22:29,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:29,918 INFO L124 PetriNetUnfolderBase]: 3081/4738 cut-off events. [2024-06-21 17:22:29,918 INFO L125 PetriNetUnfolderBase]: For 318333/318333 co-relation queries the response was YES. [2024-06-21 17:22:29,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37744 conditions, 4738 events. 3081/4738 cut-off events. For 318333/318333 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 25617 event pairs, 706 based on Foata normal form. 6/4742 useless extension candidates. Maximal degree in co-relation 37649. Up to 4550 conditions per place. [2024-06-21 17:22:29,973 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 222 selfloop transitions, 56 changer transitions 0/281 dead transitions. [2024-06-21 17:22:29,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 281 transitions, 4168 flow [2024-06-21 17:22:29,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:22:29,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:22:29,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 17:22:29,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 17:22:29,975 INFO L175 Difference]: Start difference. First operand has 196 places, 236 transitions, 3084 flow. Second operand 7 states and 125 transitions. [2024-06-21 17:22:29,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 281 transitions, 4168 flow [2024-06-21 17:22:30,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 281 transitions, 4000 flow, removed 71 selfloop flow, removed 3 redundant places. [2024-06-21 17:22:30,601 INFO L231 Difference]: Finished difference. Result has 202 places, 256 transitions, 3479 flow [2024-06-21 17:22:30,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2919, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3479, PETRI_PLACES=202, PETRI_TRANSITIONS=256} [2024-06-21 17:22:30,602 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 161 predicate places. [2024-06-21 17:22:30,602 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 256 transitions, 3479 flow [2024-06-21 17:22:30,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:30,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:30,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:30,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 17:22:30,602 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:30,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:30,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1380570878, now seen corresponding path program 1 times [2024-06-21 17:22:30,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:30,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019322784] [2024-06-21 17:22:30,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:30,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:30,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:31,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:31,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:31,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019322784] [2024-06-21 17:22:31,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019322784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:31,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:31,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:22:31,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204863120] [2024-06-21 17:22:31,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:31,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:22:31,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:31,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:22:31,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:22:31,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:22:31,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 256 transitions, 3479 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:22:31,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:31,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:22:31,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:32,219 INFO L124 PetriNetUnfolderBase]: 3076/4732 cut-off events. [2024-06-21 17:22:32,219 INFO L125 PetriNetUnfolderBase]: For 326057/326057 co-relation queries the response was YES. [2024-06-21 17:22:32,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38423 conditions, 4732 events. 3076/4732 cut-off events. For 326057/326057 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 25566 event pairs, 716 based on Foata normal form. 2/4732 useless extension candidates. Maximal degree in co-relation 38324. Up to 4702 conditions per place. [2024-06-21 17:22:32,261 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 251 selfloop transitions, 13 changer transitions 0/267 dead transitions. [2024-06-21 17:22:32,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 267 transitions, 4071 flow [2024-06-21 17:22:32,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:22:32,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:22:32,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2024-06-21 17:22:32,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 17:22:32,262 INFO L175 Difference]: Start difference. First operand has 202 places, 256 transitions, 3479 flow. Second operand 5 states and 80 transitions. [2024-06-21 17:22:32,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 267 transitions, 4071 flow [2024-06-21 17:22:32,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 267 transitions, 3933 flow, removed 64 selfloop flow, removed 2 redundant places. [2024-06-21 17:22:32,800 INFO L231 Difference]: Finished difference. Result has 205 places, 258 transitions, 3414 flow [2024-06-21 17:22:32,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3341, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3414, PETRI_PLACES=205, PETRI_TRANSITIONS=258} [2024-06-21 17:22:32,801 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-21 17:22:32,801 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 258 transitions, 3414 flow [2024-06-21 17:22:32,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:22:32,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:32,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:32,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 17:22:32,801 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:32,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:32,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1598377293, now seen corresponding path program 1 times [2024-06-21 17:22:32,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:32,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275769577] [2024-06-21 17:22:32,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:32,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:32,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:33,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:33,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:33,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275769577] [2024-06-21 17:22:33,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275769577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:33,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:33,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:22:33,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025267680] [2024-06-21 17:22:33,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:33,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:22:33,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:33,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:22:33,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:22:33,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:22:33,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 258 transitions, 3414 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:22:33,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:33,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:22:33,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:34,455 INFO L124 PetriNetUnfolderBase]: 3056/4704 cut-off events. [2024-06-21 17:22:34,456 INFO L125 PetriNetUnfolderBase]: For 333115/333124 co-relation queries the response was YES. [2024-06-21 17:22:34,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37687 conditions, 4704 events. 3056/4704 cut-off events. For 333115/333124 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 25215 event pairs, 560 based on Foata normal form. 16/4711 useless extension candidates. Maximal degree in co-relation 37586. Up to 4484 conditions per place. [2024-06-21 17:22:34,500 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 264 selfloop transitions, 20 changer transitions 0/287 dead transitions. [2024-06-21 17:22:34,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 287 transitions, 4068 flow [2024-06-21 17:22:34,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:22:34,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:22:34,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 17:22:34,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-21 17:22:34,501 INFO L175 Difference]: Start difference. First operand has 205 places, 258 transitions, 3414 flow. Second operand 8 states and 127 transitions. [2024-06-21 17:22:34,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 287 transitions, 4068 flow [2024-06-21 17:22:35,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 287 transitions, 4011 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-21 17:22:35,050 INFO L231 Difference]: Finished difference. Result has 210 places, 258 transitions, 3403 flow [2024-06-21 17:22:35,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3357, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3403, PETRI_PLACES=210, PETRI_TRANSITIONS=258} [2024-06-21 17:22:35,051 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 169 predicate places. [2024-06-21 17:22:35,051 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 258 transitions, 3403 flow [2024-06-21 17:22:35,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:22:35,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:35,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:35,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 17:22:35,051 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)] === [2024-06-21 17:22:35,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:35,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1255436147, now seen corresponding path program 2 times [2024-06-21 17:22:35,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:35,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107327394] [2024-06-21 17:22:35,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:35,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:35,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:35,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:35,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:35,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107327394] [2024-06-21 17:22:35,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107327394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:35,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:35,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:22:35,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622483635] [2024-06-21 17:22:35,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:35,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:22:35,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:35,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:22:35,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:22:35,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:22:35,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 258 transitions, 3403 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:22:35,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:35,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:22:35,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:36,804 INFO L124 PetriNetUnfolderBase]: 3036/4672 cut-off events. [2024-06-21 17:22:36,804 INFO L125 PetriNetUnfolderBase]: For 329807/329813 co-relation queries the response was YES. [2024-06-21 17:22:36,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37144 conditions, 4672 events. 3036/4672 cut-off events. For 329807/329813 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 25149 event pairs, 608 based on Foata normal form. 14/4677 useless extension candidates. Maximal degree in co-relation 37042. Up to 4071 conditions per place. [2024-06-21 17:22:36,846 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 225 selfloop transitions, 61 changer transitions 0/289 dead transitions. [2024-06-21 17:22:36,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 289 transitions, 4101 flow [2024-06-21 17:22:36,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:22:36,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:22:36,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 17:22:36,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-21 17:22:36,847 INFO L175 Difference]: Start difference. First operand has 210 places, 258 transitions, 3403 flow. Second operand 8 states and 132 transitions. [2024-06-21 17:22:36,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 289 transitions, 4101 flow [2024-06-21 17:22:37,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 289 transitions, 3972 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-21 17:22:37,556 INFO L231 Difference]: Finished difference. Result has 212 places, 260 transitions, 3468 flow [2024-06-21 17:22:37,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3276, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3468, PETRI_PLACES=212, PETRI_TRANSITIONS=260} [2024-06-21 17:22:37,556 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 171 predicate places. [2024-06-21 17:22:37,556 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 260 transitions, 3468 flow [2024-06-21 17:22:37,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:22:37,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:37,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:37,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 17:22:37,557 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)] === [2024-06-21 17:22:37,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:37,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1255320827, now seen corresponding path program 3 times [2024-06-21 17:22:37,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:37,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354364919] [2024-06-21 17:22:37,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:37,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:37,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:38,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:38,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:38,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354364919] [2024-06-21 17:22:38,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354364919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:38,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:38,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:22:38,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737336309] [2024-06-21 17:22:38,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:38,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:22:38,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:38,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:22:38,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:22:38,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:22:38,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 260 transitions, 3468 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:22:38,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:38,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:22:38,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:39,391 INFO L124 PetriNetUnfolderBase]: 3016/4640 cut-off events. [2024-06-21 17:22:39,391 INFO L125 PetriNetUnfolderBase]: For 328540/328546 co-relation queries the response was YES. [2024-06-21 17:22:39,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36402 conditions, 4640 events. 3016/4640 cut-off events. For 328540/328546 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 24921 event pairs, 604 based on Foata normal form. 14/4645 useless extension candidates. Maximal degree in co-relation 36299. Up to 4152 conditions per place. [2024-06-21 17:22:39,446 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 227 selfloop transitions, 59 changer transitions 0/289 dead transitions. [2024-06-21 17:22:39,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 289 transitions, 4130 flow [2024-06-21 17:22:39,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:22:39,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:22:39,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 17:22:39,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-21 17:22:39,447 INFO L175 Difference]: Start difference. First operand has 212 places, 260 transitions, 3468 flow. Second operand 8 states and 134 transitions. [2024-06-21 17:22:39,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 289 transitions, 4130 flow [2024-06-21 17:22:40,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 289 transitions, 3803 flow, removed 37 selfloop flow, removed 8 redundant places. [2024-06-21 17:22:40,166 INFO L231 Difference]: Finished difference. Result has 212 places, 260 transitions, 3268 flow [2024-06-21 17:22:40,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3141, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3268, PETRI_PLACES=212, PETRI_TRANSITIONS=260} [2024-06-21 17:22:40,167 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 171 predicate places. [2024-06-21 17:22:40,167 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 260 transitions, 3268 flow [2024-06-21 17:22:40,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:22:40,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:40,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:40,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 17:22:40,167 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:40,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:40,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1721289976, now seen corresponding path program 1 times [2024-06-21 17:22:40,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:40,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558265845] [2024-06-21 17:22:40,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:40,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:40,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:40,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:40,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:40,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558265845] [2024-06-21 17:22:40,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558265845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:40,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:40,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:22:40,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824428180] [2024-06-21 17:22:40,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:40,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:22:40,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:40,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:22:40,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:22:40,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:22:40,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 260 transitions, 3268 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:22:40,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:40,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:22:40,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:41,629 INFO L124 PetriNetUnfolderBase]: 3083/4734 cut-off events. [2024-06-21 17:22:41,629 INFO L125 PetriNetUnfolderBase]: For 327471/327471 co-relation queries the response was YES. [2024-06-21 17:22:41,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36118 conditions, 4734 events. 3083/4734 cut-off events. For 327471/327471 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 25377 event pairs, 663 based on Foata normal form. 4/4736 useless extension candidates. Maximal degree in co-relation 36016. Up to 4500 conditions per place. [2024-06-21 17:22:41,674 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 251 selfloop transitions, 68 changer transitions 0/322 dead transitions. [2024-06-21 17:22:41,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 322 transitions, 4543 flow [2024-06-21 17:22:41,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:22:41,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:22:41,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 17:22:41,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-21 17:22:41,675 INFO L175 Difference]: Start difference. First operand has 212 places, 260 transitions, 3268 flow. Second operand 9 states and 154 transitions. [2024-06-21 17:22:41,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 322 transitions, 4543 flow [2024-06-21 17:22:42,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 322 transitions, 4410 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 17:22:42,442 INFO L231 Difference]: Finished difference. Result has 219 places, 286 transitions, 3625 flow [2024-06-21 17:22:42,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3145, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3625, PETRI_PLACES=219, PETRI_TRANSITIONS=286} [2024-06-21 17:22:42,443 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 178 predicate places. [2024-06-21 17:22:42,443 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 286 transitions, 3625 flow [2024-06-21 17:22:42,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:22:42,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:42,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:42,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 17:22:42,444 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:42,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:42,444 INFO L85 PathProgramCache]: Analyzing trace with hash 477888582, now seen corresponding path program 2 times [2024-06-21 17:22:42,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:42,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838430091] [2024-06-21 17:22:42,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:42,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:42,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:42,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:42,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:42,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838430091] [2024-06-21 17:22:42,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838430091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:42,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:42,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:22:42,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344186606] [2024-06-21 17:22:42,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:42,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:22:42,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:42,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:22:42,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:22:43,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:22:43,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 286 transitions, 3625 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:22:43,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:43,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:22:43,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:44,041 INFO L124 PetriNetUnfolderBase]: 3103/4762 cut-off events. [2024-06-21 17:22:44,042 INFO L125 PetriNetUnfolderBase]: For 340236/340236 co-relation queries the response was YES. [2024-06-21 17:22:44,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37383 conditions, 4762 events. 3103/4762 cut-off events. For 340236/340236 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 25576 event pairs, 668 based on Foata normal form. 4/4764 useless extension candidates. Maximal degree in co-relation 37277. Up to 4516 conditions per place. [2024-06-21 17:22:44,091 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 249 selfloop transitions, 70 changer transitions 0/322 dead transitions. [2024-06-21 17:22:44,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 322 transitions, 4601 flow [2024-06-21 17:22:44,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:22:44,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:22:44,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 17:22:44,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 17:22:44,092 INFO L175 Difference]: Start difference. First operand has 219 places, 286 transitions, 3625 flow. Second operand 8 states and 136 transitions. [2024-06-21 17:22:44,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 322 transitions, 4601 flow [2024-06-21 17:22:44,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 322 transitions, 4513 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-21 17:22:44,666 INFO L231 Difference]: Finished difference. Result has 225 places, 290 transitions, 3775 flow [2024-06-21 17:22:44,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3547, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3775, PETRI_PLACES=225, PETRI_TRANSITIONS=290} [2024-06-21 17:22:44,666 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 184 predicate places. [2024-06-21 17:22:44,666 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 290 transitions, 3775 flow [2024-06-21 17:22:44,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:22:44,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:44,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:44,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 17:22:44,667 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:44,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:44,667 INFO L85 PathProgramCache]: Analyzing trace with hash 481432719, now seen corresponding path program 1 times [2024-06-21 17:22:44,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:44,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181625465] [2024-06-21 17:22:44,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:44,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:44,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:45,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:45,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:45,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181625465] [2024-06-21 17:22:45,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181625465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:45,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:45,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:22:45,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610363226] [2024-06-21 17:22:45,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:45,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:22:45,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:45,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:22:45,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:22:45,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:22:45,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 290 transitions, 3775 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:45,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:45,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:22:45,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:45,944 INFO L124 PetriNetUnfolderBase]: 3124/4791 cut-off events. [2024-06-21 17:22:45,944 INFO L125 PetriNetUnfolderBase]: For 349822/349822 co-relation queries the response was YES. [2024-06-21 17:22:45,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38065 conditions, 4791 events. 3124/4791 cut-off events. For 349822/349822 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 25739 event pairs, 672 based on Foata normal form. 1/4790 useless extension candidates. Maximal degree in co-relation 37957. Up to 4712 conditions per place. [2024-06-21 17:22:45,992 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 283 selfloop transitions, 32 changer transitions 0/318 dead transitions. [2024-06-21 17:22:45,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 318 transitions, 4760 flow [2024-06-21 17:22:45,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:22:45,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:22:45,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-21 17:22:45,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 17:22:45,993 INFO L175 Difference]: Start difference. First operand has 225 places, 290 transitions, 3775 flow. Second operand 7 states and 112 transitions. [2024-06-21 17:22:45,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 318 transitions, 4760 flow [2024-06-21 17:22:46,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 318 transitions, 4587 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-21 17:22:46,536 INFO L231 Difference]: Finished difference. Result has 227 places, 299 transitions, 3880 flow [2024-06-21 17:22:46,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3604, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3880, PETRI_PLACES=227, PETRI_TRANSITIONS=299} [2024-06-21 17:22:46,537 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 186 predicate places. [2024-06-21 17:22:46,537 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 299 transitions, 3880 flow [2024-06-21 17:22:46,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:46,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:46,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:46,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 17:22:46,538 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:46,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:46,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1283560867, now seen corresponding path program 2 times [2024-06-21 17:22:46,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:46,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378908450] [2024-06-21 17:22:46,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:46,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:46,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:46,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:46,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:46,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378908450] [2024-06-21 17:22:46,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378908450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:46,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:46,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:22:46,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282811438] [2024-06-21 17:22:46,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:46,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:22:46,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:46,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:22:46,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:22:46,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:22:46,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 299 transitions, 3880 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:46,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:46,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:22:46,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:47,905 INFO L124 PetriNetUnfolderBase]: 3121/4787 cut-off events. [2024-06-21 17:22:47,906 INFO L125 PetriNetUnfolderBase]: For 348012/348012 co-relation queries the response was YES. [2024-06-21 17:22:47,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37775 conditions, 4787 events. 3121/4787 cut-off events. For 348012/348012 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 25737 event pairs, 672 based on Foata normal form. 1/4786 useless extension candidates. Maximal degree in co-relation 37666. Up to 4736 conditions per place. [2024-06-21 17:22:47,946 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 289 selfloop transitions, 22 changer transitions 0/314 dead transitions. [2024-06-21 17:22:47,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 314 transitions, 4552 flow [2024-06-21 17:22:47,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:22:47,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:22:47,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-21 17:22:47,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821428571428571 [2024-06-21 17:22:47,947 INFO L175 Difference]: Start difference. First operand has 227 places, 299 transitions, 3880 flow. Second operand 7 states and 107 transitions. [2024-06-21 17:22:47,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 314 transitions, 4552 flow [2024-06-21 17:22:48,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 314 transitions, 4478 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-21 17:22:48,463 INFO L231 Difference]: Finished difference. Result has 231 places, 299 transitions, 3856 flow [2024-06-21 17:22:48,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3806, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3856, PETRI_PLACES=231, PETRI_TRANSITIONS=299} [2024-06-21 17:22:48,463 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 190 predicate places. [2024-06-21 17:22:48,463 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 299 transitions, 3856 flow [2024-06-21 17:22:48,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:48,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:48,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:48,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 17:22:48,464 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:48,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:48,464 INFO L85 PathProgramCache]: Analyzing trace with hash 487143012, now seen corresponding path program 3 times [2024-06-21 17:22:48,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:48,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259774224] [2024-06-21 17:22:48,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:48,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:48,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:48,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:48,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:48,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259774224] [2024-06-21 17:22:48,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259774224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:48,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:48,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:22:48,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220256545] [2024-06-21 17:22:48,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:48,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:22:48,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:48,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:22:48,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:22:49,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:22:49,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 299 transitions, 3856 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:22:49,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:49,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:22:49,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:50,037 INFO L124 PetriNetUnfolderBase]: 3181/4870 cut-off events. [2024-06-21 17:22:50,037 INFO L125 PetriNetUnfolderBase]: For 373720/373720 co-relation queries the response was YES. [2024-06-21 17:22:50,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38839 conditions, 4870 events. 3181/4870 cut-off events. For 373720/373720 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 26151 event pairs, 671 based on Foata normal form. 4/4872 useless extension candidates. Maximal degree in co-relation 38728. Up to 4587 conditions per place. [2024-06-21 17:22:50,091 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 264 selfloop transitions, 74 changer transitions 0/341 dead transitions. [2024-06-21 17:22:50,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 341 transitions, 5078 flow [2024-06-21 17:22:50,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:22:50,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:22:50,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 17:22:50,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-21 17:22:50,092 INFO L175 Difference]: Start difference. First operand has 231 places, 299 transitions, 3856 flow. Second operand 8 states and 135 transitions. [2024-06-21 17:22:50,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 341 transitions, 5078 flow [2024-06-21 17:22:50,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 341 transitions, 5002 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 17:22:50,649 INFO L231 Difference]: Finished difference. Result has 234 places, 308 transitions, 4095 flow [2024-06-21 17:22:50,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3780, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4095, PETRI_PLACES=234, PETRI_TRANSITIONS=308} [2024-06-21 17:22:50,649 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 193 predicate places. [2024-06-21 17:22:50,650 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 308 transitions, 4095 flow [2024-06-21 17:22:50,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:22:50,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:50,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:50,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 17:22:50,650 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:50,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:50,650 INFO L85 PathProgramCache]: Analyzing trace with hash 487154172, now seen corresponding path program 4 times [2024-06-21 17:22:50,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:50,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855197153] [2024-06-21 17:22:50,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:50,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:50,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:51,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:51,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:51,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855197153] [2024-06-21 17:22:51,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855197153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:51,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:51,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:22:51,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305149924] [2024-06-21 17:22:51,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:51,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:22:51,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:51,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:22:51,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:22:51,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:22:51,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 308 transitions, 4095 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:22:51,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:51,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:22:51,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:52,273 INFO L124 PetriNetUnfolderBase]: 3166/4850 cut-off events. [2024-06-21 17:22:52,274 INFO L125 PetriNetUnfolderBase]: For 378868/378868 co-relation queries the response was YES. [2024-06-21 17:22:52,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38782 conditions, 4850 events. 3166/4850 cut-off events. For 378868/378868 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 26074 event pairs, 668 based on Foata normal form. 5/4853 useless extension candidates. Maximal degree in co-relation 38670. Up to 4577 conditions per place. [2024-06-21 17:22:52,327 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 259 selfloop transitions, 76 changer transitions 0/338 dead transitions. [2024-06-21 17:22:52,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 338 transitions, 5022 flow [2024-06-21 17:22:52,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:22:52,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:22:52,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 17:22:52,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-21 17:22:52,328 INFO L175 Difference]: Start difference. First operand has 234 places, 308 transitions, 4095 flow. Second operand 8 states and 132 transitions. [2024-06-21 17:22:52,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 338 transitions, 5022 flow [2024-06-21 17:22:52,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 338 transitions, 4821 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-21 17:22:52,979 INFO L231 Difference]: Finished difference. Result has 238 places, 308 transitions, 4054 flow [2024-06-21 17:22:52,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3894, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4054, PETRI_PLACES=238, PETRI_TRANSITIONS=308} [2024-06-21 17:22:52,979 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 197 predicate places. [2024-06-21 17:22:52,979 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 308 transitions, 4054 flow [2024-06-21 17:22:52,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:22:52,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:52,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:52,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 17:22:52,980 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:52,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:52,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1677542543, now seen corresponding path program 3 times [2024-06-21 17:22:52,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:52,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263418839] [2024-06-21 17:22:52,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:52,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:52,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:53,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:53,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:53,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263418839] [2024-06-21 17:22:53,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263418839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:53,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:53,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:22:53,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132602836] [2024-06-21 17:22:53,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:53,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:22:53,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:53,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:22:53,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:22:53,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:22:53,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 308 transitions, 4054 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:53,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:53,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:22:53,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:54,352 INFO L124 PetriNetUnfolderBase]: 3168/4855 cut-off events. [2024-06-21 17:22:54,352 INFO L125 PetriNetUnfolderBase]: For 383535/383562 co-relation queries the response was YES. [2024-06-21 17:22:54,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38784 conditions, 4855 events. 3168/4855 cut-off events. For 383535/383562 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 26135 event pairs, 681 based on Foata normal form. 20/4869 useless extension candidates. Maximal degree in co-relation 38671. Up to 4657 conditions per place. [2024-06-21 17:22:54,401 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 265 selfloop transitions, 65 changer transitions 0/333 dead transitions. [2024-06-21 17:22:54,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 333 transitions, 5113 flow [2024-06-21 17:22:54,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:22:54,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:22:54,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-21 17:22:54,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 17:22:54,402 INFO L175 Difference]: Start difference. First operand has 238 places, 308 transitions, 4054 flow. Second operand 7 states and 115 transitions. [2024-06-21 17:22:54,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 333 transitions, 5113 flow [2024-06-21 17:22:55,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 333 transitions, 4950 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 17:22:55,042 INFO L231 Difference]: Finished difference. Result has 239 places, 315 transitions, 4172 flow [2024-06-21 17:22:55,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3891, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4172, PETRI_PLACES=239, PETRI_TRANSITIONS=315} [2024-06-21 17:22:55,042 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 198 predicate places. [2024-06-21 17:22:55,042 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 315 transitions, 4172 flow [2024-06-21 17:22:55,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:55,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:55,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:55,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 17:22:55,043 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:55,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:55,043 INFO L85 PathProgramCache]: Analyzing trace with hash -566295405, now seen corresponding path program 4 times [2024-06-21 17:22:55,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:55,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302750198] [2024-06-21 17:22:55,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:55,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:55,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:55,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:55,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:55,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302750198] [2024-06-21 17:22:55,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302750198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:55,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:55,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:22:55,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736697155] [2024-06-21 17:22:55,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:55,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:22:55,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:55,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:22:55,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:22:55,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:22:55,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 315 transitions, 4172 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:55,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:55,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:22:55,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:56,630 INFO L124 PetriNetUnfolderBase]: 3144/4821 cut-off events. [2024-06-21 17:22:56,630 INFO L125 PetriNetUnfolderBase]: For 390267/390267 co-relation queries the response was YES. [2024-06-21 17:22:56,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38446 conditions, 4821 events. 3144/4821 cut-off events. For 390267/390267 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 25945 event pairs, 665 based on Foata normal form. 6/4825 useless extension candidates. Maximal degree in co-relation 38331. Up to 4720 conditions per place. [2024-06-21 17:22:56,676 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 290 selfloop transitions, 40 changer transitions 0/333 dead transitions. [2024-06-21 17:22:56,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 333 transitions, 4910 flow [2024-06-21 17:22:56,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:22:56,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:22:56,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-21 17:22:56,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39375 [2024-06-21 17:22:56,681 INFO L175 Difference]: Start difference. First operand has 239 places, 315 transitions, 4172 flow. Second operand 8 states and 126 transitions. [2024-06-21 17:22:56,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 333 transitions, 4910 flow [2024-06-21 17:22:57,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 333 transitions, 4672 flow, removed 88 selfloop flow, removed 3 redundant places. [2024-06-21 17:22:57,380 INFO L231 Difference]: Finished difference. Result has 244 places, 315 transitions, 4028 flow [2024-06-21 17:22:57,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3934, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4028, PETRI_PLACES=244, PETRI_TRANSITIONS=315} [2024-06-21 17:22:57,381 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 203 predicate places. [2024-06-21 17:22:57,381 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 315 transitions, 4028 flow [2024-06-21 17:22:57,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:57,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:57,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:57,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 17:22:57,381 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:57,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:57,382 INFO L85 PathProgramCache]: Analyzing trace with hash 354590759, now seen corresponding path program 5 times [2024-06-21 17:22:57,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:57,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453403815] [2024-06-21 17:22:57,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:57,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:57,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:57,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:57,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:57,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453403815] [2024-06-21 17:22:57,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453403815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:57,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:57,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:22:57,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537257782] [2024-06-21 17:22:57,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:57,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:22:57,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:57,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:22:57,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:22:57,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:22:57,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 315 transitions, 4028 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:57,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:57,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:22:57,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:58,740 INFO L124 PetriNetUnfolderBase]: 3142/4818 cut-off events. [2024-06-21 17:22:58,740 INFO L125 PetriNetUnfolderBase]: For 392586/392586 co-relation queries the response was YES. [2024-06-21 17:22:58,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38070 conditions, 4818 events. 3142/4818 cut-off events. For 392586/392586 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 25914 event pairs, 669 based on Foata normal form. 6/4822 useless extension candidates. Maximal degree in co-relation 37954. Up to 4620 conditions per place. [2024-06-21 17:22:58,797 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 281 selfloop transitions, 59 changer transitions 0/343 dead transitions. [2024-06-21 17:22:58,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 343 transitions, 4997 flow [2024-06-21 17:22:58,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:22:58,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:22:58,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 17:22:58,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 17:22:58,799 INFO L175 Difference]: Start difference. First operand has 244 places, 315 transitions, 4028 flow. Second operand 7 states and 125 transitions. [2024-06-21 17:22:58,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 343 transitions, 4997 flow [2024-06-21 17:22:59,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 343 transitions, 4915 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 17:22:59,631 INFO L231 Difference]: Finished difference. Result has 245 places, 319 transitions, 4197 flow [2024-06-21 17:22:59,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3948, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4197, PETRI_PLACES=245, PETRI_TRANSITIONS=319} [2024-06-21 17:22:59,631 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 204 predicate places. [2024-06-21 17:22:59,631 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 319 transitions, 4197 flow [2024-06-21 17:22:59,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:59,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:59,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:59,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 17:22:59,631 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:59,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:59,632 INFO L85 PathProgramCache]: Analyzing trace with hash -893366769, now seen corresponding path program 6 times [2024-06-21 17:22:59,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:59,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563715062] [2024-06-21 17:22:59,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:59,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:59,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:00,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:00,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:00,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563715062] [2024-06-21 17:23:00,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563715062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:00,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:00,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:23:00,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583045382] [2024-06-21 17:23:00,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:00,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:23:00,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:00,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:23:00,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:23:00,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:23:00,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 319 transitions, 4197 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:00,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:00,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:23:00,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:00,961 INFO L124 PetriNetUnfolderBase]: 3127/4797 cut-off events. [2024-06-21 17:23:00,961 INFO L125 PetriNetUnfolderBase]: For 393039/393039 co-relation queries the response was YES. [2024-06-21 17:23:00,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38128 conditions, 4797 events. 3127/4797 cut-off events. For 393039/393039 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 25839 event pairs, 671 based on Foata normal form. 3/4798 useless extension candidates. Maximal degree in co-relation 38010. Up to 4721 conditions per place. [2024-06-21 17:23:01,015 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 301 selfloop transitions, 33 changer transitions 0/337 dead transitions. [2024-06-21 17:23:01,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 337 transitions, 4933 flow [2024-06-21 17:23:01,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:23:01,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:23:01,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-21 17:23:01,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-21 17:23:01,016 INFO L175 Difference]: Start difference. First operand has 245 places, 319 transitions, 4197 flow. Second operand 6 states and 104 transitions. [2024-06-21 17:23:01,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 337 transitions, 4933 flow [2024-06-21 17:23:01,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 337 transitions, 4719 flow, removed 75 selfloop flow, removed 4 redundant places. [2024-06-21 17:23:01,825 INFO L231 Difference]: Finished difference. Result has 247 places, 319 transitions, 4067 flow [2024-06-21 17:23:01,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3983, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4067, PETRI_PLACES=247, PETRI_TRANSITIONS=319} [2024-06-21 17:23:01,826 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 206 predicate places. [2024-06-21 17:23:01,826 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 319 transitions, 4067 flow [2024-06-21 17:23:01,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:01,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:01,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:01,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 17:23:01,826 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:01,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:01,826 INFO L85 PathProgramCache]: Analyzing trace with hash -688367317, now seen corresponding path program 4 times [2024-06-21 17:23:01,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:01,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831773538] [2024-06-21 17:23:01,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:01,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:01,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:02,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:02,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:02,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831773538] [2024-06-21 17:23:02,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831773538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:02,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:02,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:23:02,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411197336] [2024-06-21 17:23:02,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:02,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:23:02,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:02,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:23:02,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:23:02,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:23:02,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 319 transitions, 4067 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:02,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:02,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:23:02,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:03,786 INFO L124 PetriNetUnfolderBase]: 3107/4771 cut-off events. [2024-06-21 17:23:03,786 INFO L125 PetriNetUnfolderBase]: For 397929/397932 co-relation queries the response was YES. [2024-06-21 17:23:03,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37206 conditions, 4771 events. 3107/4771 cut-off events. For 397929/397932 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 25549 event pairs, 596 based on Foata normal form. 14/4772 useless extension candidates. Maximal degree in co-relation 37087. Up to 4021 conditions per place. [2024-06-21 17:23:03,837 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 273 selfloop transitions, 80 changer transitions 0/356 dead transitions. [2024-06-21 17:23:03,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 356 transitions, 4839 flow [2024-06-21 17:23:03,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:23:03,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:23:03,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 17:23:03,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361111111111111 [2024-06-21 17:23:03,838 INFO L175 Difference]: Start difference. First operand has 247 places, 319 transitions, 4067 flow. Second operand 9 states and 157 transitions. [2024-06-21 17:23:03,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 356 transitions, 4839 flow [2024-06-21 17:23:04,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 356 transitions, 4727 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 17:23:04,492 INFO L231 Difference]: Finished difference. Result has 249 places, 318 transitions, 4029 flow [2024-06-21 17:23:04,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3865, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4029, PETRI_PLACES=249, PETRI_TRANSITIONS=318} [2024-06-21 17:23:04,492 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 208 predicate places. [2024-06-21 17:23:04,492 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 318 transitions, 4029 flow [2024-06-21 17:23:04,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:04,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:04,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:04,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 17:23:04,493 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:04,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:04,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1002843118, now seen corresponding path program 5 times [2024-06-21 17:23:04,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:04,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661426329] [2024-06-21 17:23:04,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:04,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:04,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:04,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:04,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:04,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661426329] [2024-06-21 17:23:04,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661426329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:04,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:04,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:23:04,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162293766] [2024-06-21 17:23:04,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:04,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:23:04,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:04,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:23:04,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:23:05,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:23:05,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 318 transitions, 4029 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:23:05,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:05,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:23:05,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:05,973 INFO L124 PetriNetUnfolderBase]: 3127/4793 cut-off events. [2024-06-21 17:23:05,973 INFO L125 PetriNetUnfolderBase]: For 353769/353769 co-relation queries the response was YES. [2024-06-21 17:23:06,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36866 conditions, 4793 events. 3127/4793 cut-off events. For 353769/353769 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 25723 event pairs, 654 based on Foata normal form. 4/4795 useless extension candidates. Maximal degree in co-relation 36748. Up to 4608 conditions per place. [2024-06-21 17:23:06,023 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 295 selfloop transitions, 55 changer transitions 0/353 dead transitions. [2024-06-21 17:23:06,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 353 transitions, 5060 flow [2024-06-21 17:23:06,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:23:06,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:23:06,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 17:23:06,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392857142857143 [2024-06-21 17:23:06,024 INFO L175 Difference]: Start difference. First operand has 249 places, 318 transitions, 4029 flow. Second operand 7 states and 123 transitions. [2024-06-21 17:23:06,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 353 transitions, 5060 flow [2024-06-21 17:23:06,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 353 transitions, 4862 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-21 17:23:06,558 INFO L231 Difference]: Finished difference. Result has 248 places, 322 transitions, 4021 flow [2024-06-21 17:23:06,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3831, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4021, PETRI_PLACES=248, PETRI_TRANSITIONS=322} [2024-06-21 17:23:06,558 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 207 predicate places. [2024-06-21 17:23:06,558 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 322 transitions, 4021 flow [2024-06-21 17:23:06,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:23:06,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:06,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:06,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 17:23:06,559 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:06,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:06,559 INFO L85 PathProgramCache]: Analyzing trace with hash 138627934, now seen corresponding path program 6 times [2024-06-21 17:23:06,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:06,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63621253] [2024-06-21 17:23:06,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:06,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:06,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:07,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:07,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:07,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63621253] [2024-06-21 17:23:07,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63621253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:07,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:07,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:23:07,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132860783] [2024-06-21 17:23:07,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:07,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:23:07,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:07,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:23:07,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:23:07,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:23:07,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 322 transitions, 4021 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:23:07,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:07,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:23:07,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:08,040 INFO L124 PetriNetUnfolderBase]: 3112/4773 cut-off events. [2024-06-21 17:23:08,040 INFO L125 PetriNetUnfolderBase]: For 355011/355011 co-relation queries the response was YES. [2024-06-21 17:23:08,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36239 conditions, 4773 events. 3112/4773 cut-off events. For 355011/355011 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 25590 event pairs, 647 based on Foata normal form. 5/4776 useless extension candidates. Maximal degree in co-relation 36120. Up to 4598 conditions per place. [2024-06-21 17:23:08,180 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 296 selfloop transitions, 51 changer transitions 0/350 dead transitions. [2024-06-21 17:23:08,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 350 transitions, 4849 flow [2024-06-21 17:23:08,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:23:08,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:23:08,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 17:23:08,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41785714285714287 [2024-06-21 17:23:08,182 INFO L175 Difference]: Start difference. First operand has 248 places, 322 transitions, 4021 flow. Second operand 7 states and 117 transitions. [2024-06-21 17:23:08,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 350 transitions, 4849 flow [2024-06-21 17:23:08,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 350 transitions, 4608 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-21 17:23:08,827 INFO L231 Difference]: Finished difference. Result has 249 places, 322 transitions, 3890 flow [2024-06-21 17:23:08,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3780, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3890, PETRI_PLACES=249, PETRI_TRANSITIONS=322} [2024-06-21 17:23:08,827 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 208 predicate places. [2024-06-21 17:23:08,827 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 322 transitions, 3890 flow [2024-06-21 17:23:08,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:23:08,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:08,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:08,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 17:23:08,828 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:08,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:08,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1685169039, now seen corresponding path program 1 times [2024-06-21 17:23:08,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:08,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422170138] [2024-06-21 17:23:08,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:08,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:08,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:09,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:09,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:09,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422170138] [2024-06-21 17:23:09,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422170138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:09,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:09,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:23:09,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811154422] [2024-06-21 17:23:09,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:09,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:23:09,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:09,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:23:09,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:23:09,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:23:09,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 322 transitions, 3890 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:23:09,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:09,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:23:09,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:10,429 INFO L124 PetriNetUnfolderBase]: 3130/4800 cut-off events. [2024-06-21 17:23:10,429 INFO L125 PetriNetUnfolderBase]: For 360353/360380 co-relation queries the response was YES. [2024-06-21 17:23:10,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36457 conditions, 4800 events. 3130/4800 cut-off events. For 360353/360380 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 25823 event pairs, 660 based on Foata normal form. 20/4814 useless extension candidates. Maximal degree in co-relation 36337. Up to 4567 conditions per place. [2024-06-21 17:23:10,485 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 269 selfloop transitions, 82 changer transitions 0/354 dead transitions. [2024-06-21 17:23:10,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 354 transitions, 5164 flow [2024-06-21 17:23:10,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:23:10,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:23:10,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-21 17:23:10,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3972222222222222 [2024-06-21 17:23:10,486 INFO L175 Difference]: Start difference. First operand has 249 places, 322 transitions, 3890 flow. Second operand 9 states and 143 transitions. [2024-06-21 17:23:10,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 354 transitions, 5164 flow [2024-06-21 17:23:11,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 354 transitions, 5012 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 17:23:11,241 INFO L231 Difference]: Finished difference. Result has 252 places, 330 transitions, 4034 flow [2024-06-21 17:23:11,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3738, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4034, PETRI_PLACES=252, PETRI_TRANSITIONS=330} [2024-06-21 17:23:11,241 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 211 predicate places. [2024-06-21 17:23:11,242 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 330 transitions, 4034 flow [2024-06-21 17:23:11,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:23:11,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:11,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:11,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 17:23:11,242 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:11,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:11,243 INFO L85 PathProgramCache]: Analyzing trace with hash 809122816, now seen corresponding path program 1 times [2024-06-21 17:23:11,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:11,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037646652] [2024-06-21 17:23:11,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:11,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:11,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:11,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:11,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:11,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037646652] [2024-06-21 17:23:11,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037646652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:11,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:11,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:23:11,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527489762] [2024-06-21 17:23:11,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:11,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:23:11,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:11,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:23:11,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:23:11,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:23:11,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 330 transitions, 4034 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:23:11,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:11,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:23:11,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:12,694 INFO L124 PetriNetUnfolderBase]: 3190/4883 cut-off events. [2024-06-21 17:23:12,694 INFO L125 PetriNetUnfolderBase]: For 387819/387846 co-relation queries the response was YES. [2024-06-21 17:23:12,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38298 conditions, 4883 events. 3190/4883 cut-off events. For 387819/387846 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 26263 event pairs, 652 based on Foata normal form. 22/4899 useless extension candidates. Maximal degree in co-relation 38177. Up to 4489 conditions per place. [2024-06-21 17:23:12,752 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 264 selfloop transitions, 102 changer transitions 0/369 dead transitions. [2024-06-21 17:23:12,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 369 transitions, 5442 flow [2024-06-21 17:23:12,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:23:12,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:23:12,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 17:23:12,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-21 17:23:12,753 INFO L175 Difference]: Start difference. First operand has 252 places, 330 transitions, 4034 flow. Second operand 8 states and 132 transitions. [2024-06-21 17:23:12,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 369 transitions, 5442 flow [2024-06-21 17:23:13,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 369 transitions, 5303 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-21 17:23:13,722 INFO L231 Difference]: Finished difference. Result has 258 places, 347 transitions, 4547 flow [2024-06-21 17:23:13,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3895, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4547, PETRI_PLACES=258, PETRI_TRANSITIONS=347} [2024-06-21 17:23:13,722 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 217 predicate places. [2024-06-21 17:23:13,723 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 347 transitions, 4547 flow [2024-06-21 17:23:13,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:23:13,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:13,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:13,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 17:23:13,723 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:13,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:13,723 INFO L85 PathProgramCache]: Analyzing trace with hash 714761474, now seen corresponding path program 2 times [2024-06-21 17:23:13,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:13,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030514688] [2024-06-21 17:23:13,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:13,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:13,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:14,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:14,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:14,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030514688] [2024-06-21 17:23:14,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030514688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:14,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:14,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:23:14,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082440751] [2024-06-21 17:23:14,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:14,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:23:14,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:14,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:23:14,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:23:14,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:23:14,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 347 transitions, 4547 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:23:14,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:14,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:23:14,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:15,372 INFO L124 PetriNetUnfolderBase]: 3258/4976 cut-off events. [2024-06-21 17:23:15,372 INFO L125 PetriNetUnfolderBase]: For 418492/418492 co-relation queries the response was YES. [2024-06-21 17:23:15,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41026 conditions, 4976 events. 3258/4976 cut-off events. For 418492/418492 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 26775 event pairs, 643 based on Foata normal form. 4/4978 useless extension candidates. Maximal degree in co-relation 40901. Up to 4828 conditions per place. [2024-06-21 17:23:15,433 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 326 selfloop transitions, 51 changer transitions 0/380 dead transitions. [2024-06-21 17:23:15,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 380 transitions, 5962 flow [2024-06-21 17:23:15,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:23:15,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:23:15,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-21 17:23:15,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-21 17:23:15,436 INFO L175 Difference]: Start difference. First operand has 258 places, 347 transitions, 4547 flow. Second operand 9 states and 140 transitions. [2024-06-21 17:23:15,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 380 transitions, 5962 flow [2024-06-21 17:23:16,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 380 transitions, 5783 flow, removed 86 selfloop flow, removed 2 redundant places. [2024-06-21 17:23:16,265 INFO L231 Difference]: Finished difference. Result has 266 places, 358 transitions, 4808 flow [2024-06-21 17:23:16,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4408, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4808, PETRI_PLACES=266, PETRI_TRANSITIONS=358} [2024-06-21 17:23:16,266 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 225 predicate places. [2024-06-21 17:23:16,266 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 358 transitions, 4808 flow [2024-06-21 17:23:16,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:23:16,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:16,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:16,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 17:23:16,266 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:16,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:16,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1688978319, now seen corresponding path program 2 times [2024-06-21 17:23:16,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:16,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282995391] [2024-06-21 17:23:16,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:16,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:16,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:16,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:16,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:16,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282995391] [2024-06-21 17:23:16,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282995391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:16,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:16,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:23:16,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323116102] [2024-06-21 17:23:16,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:16,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:23:16,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:16,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:23:16,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:23:17,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:23:17,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 358 transitions, 4808 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:23:17,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:17,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:23:17,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:18,039 INFO L124 PetriNetUnfolderBase]: 3288/5018 cut-off events. [2024-06-21 17:23:18,039 INFO L125 PetriNetUnfolderBase]: For 427229/427229 co-relation queries the response was YES. [2024-06-21 17:23:18,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40647 conditions, 5018 events. 3288/5018 cut-off events. For 427229/427229 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 26996 event pairs, 649 based on Foata normal form. 6/5022 useless extension candidates. Maximal degree in co-relation 40518. Up to 4895 conditions per place. [2024-06-21 17:23:18,098 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 334 selfloop transitions, 49 changer transitions 0/386 dead transitions. [2024-06-21 17:23:18,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 386 transitions, 5788 flow [2024-06-21 17:23:18,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:23:18,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:23:18,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-21 17:23:18,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3861111111111111 [2024-06-21 17:23:18,099 INFO L175 Difference]: Start difference. First operand has 266 places, 358 transitions, 4808 flow. Second operand 9 states and 139 transitions. [2024-06-21 17:23:18,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 386 transitions, 5788 flow [2024-06-21 17:23:19,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 386 transitions, 5654 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-21 17:23:19,093 INFO L231 Difference]: Finished difference. Result has 271 places, 366 transitions, 4916 flow [2024-06-21 17:23:19,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4674, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4916, PETRI_PLACES=271, PETRI_TRANSITIONS=366} [2024-06-21 17:23:19,093 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 230 predicate places. [2024-06-21 17:23:19,093 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 366 transitions, 4916 flow [2024-06-21 17:23:19,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:23:19,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:19,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:19,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 17:23:19,093 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:19,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:19,094 INFO L85 PathProgramCache]: Analyzing trace with hash 144557459, now seen corresponding path program 1 times [2024-06-21 17:23:19,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:19,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964403399] [2024-06-21 17:23:19,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:19,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:19,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:19,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:19,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:19,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964403399] [2024-06-21 17:23:19,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964403399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:19,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:19,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:23:19,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325010608] [2024-06-21 17:23:19,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:19,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:23:19,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:19,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:23:19,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:23:19,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:23:19,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 366 transitions, 4916 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:23:19,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:19,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:23:19,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:20,750 INFO L124 PetriNetUnfolderBase]: 3285/5014 cut-off events. [2024-06-21 17:23:20,750 INFO L125 PetriNetUnfolderBase]: For 425286/425286 co-relation queries the response was YES. [2024-06-21 17:23:20,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41034 conditions, 5014 events. 3285/5014 cut-off events. For 425286/425286 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 27020 event pairs, 651 based on Foata normal form. 1/5013 useless extension candidates. Maximal degree in co-relation 40903. Up to 4951 conditions per place. [2024-06-21 17:23:20,810 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 349 selfloop transitions, 29 changer transitions 0/381 dead transitions. [2024-06-21 17:23:20,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 381 transitions, 5784 flow [2024-06-21 17:23:20,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:23:20,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:23:20,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-06-21 17:23:20,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 17:23:20,811 INFO L175 Difference]: Start difference. First operand has 271 places, 366 transitions, 4916 flow. Second operand 5 states and 85 transitions. [2024-06-21 17:23:20,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 381 transitions, 5784 flow [2024-06-21 17:23:21,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 381 transitions, 5622 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-21 17:23:21,842 INFO L231 Difference]: Finished difference. Result has 270 places, 369 transitions, 4904 flow [2024-06-21 17:23:21,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4754, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4904, PETRI_PLACES=270, PETRI_TRANSITIONS=369} [2024-06-21 17:23:21,842 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 229 predicate places. [2024-06-21 17:23:21,842 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 369 transitions, 4904 flow [2024-06-21 17:23:21,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:23:21,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:21,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:21,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 17:23:21,843 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:21,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:21,843 INFO L85 PathProgramCache]: Analyzing trace with hash 144347992, now seen corresponding path program 3 times [2024-06-21 17:23:21,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:21,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406233621] [2024-06-21 17:23:21,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:21,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:21,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:22,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:22,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:22,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406233621] [2024-06-21 17:23:22,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406233621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:22,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:22,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:23:22,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739451809] [2024-06-21 17:23:22,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:22,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:23:22,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:22,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:23:22,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:23:22,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:23:22,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 369 transitions, 4904 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:23:22,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:22,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:23:22,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:23,550 INFO L124 PetriNetUnfolderBase]: 3341/5092 cut-off events. [2024-06-21 17:23:23,550 INFO L125 PetriNetUnfolderBase]: For 452840/452840 co-relation queries the response was YES. [2024-06-21 17:23:23,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42432 conditions, 5092 events. 3341/5092 cut-off events. For 452840/452840 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 27468 event pairs, 649 based on Foata normal form. 4/5094 useless extension candidates. Maximal degree in co-relation 42300. Up to 4962 conditions per place. [2024-06-21 17:23:23,608 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 351 selfloop transitions, 42 changer transitions 0/396 dead transitions. [2024-06-21 17:23:23,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 396 transitions, 6121 flow [2024-06-21 17:23:23,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:23:23,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:23:23,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-21 17:23:23,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.384375 [2024-06-21 17:23:23,609 INFO L175 Difference]: Start difference. First operand has 270 places, 369 transitions, 4904 flow. Second operand 8 states and 123 transitions. [2024-06-21 17:23:23,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 396 transitions, 6121 flow [2024-06-21 17:23:24,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 396 transitions, 6045 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 17:23:24,604 INFO L231 Difference]: Finished difference. Result has 276 places, 377 transitions, 5161 flow [2024-06-21 17:23:24,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4828, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5161, PETRI_PLACES=276, PETRI_TRANSITIONS=377} [2024-06-21 17:23:24,605 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 235 predicate places. [2024-06-21 17:23:24,605 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 377 transitions, 5161 flow [2024-06-21 17:23:24,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:23:24,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:24,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:24,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 17:23:24,605 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:24,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:24,606 INFO L85 PathProgramCache]: Analyzing trace with hash 144342257, now seen corresponding path program 3 times [2024-06-21 17:23:24,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:24,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287920462] [2024-06-21 17:23:24,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:24,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:24,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:25,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:25,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:25,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287920462] [2024-06-21 17:23:25,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287920462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:25,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:25,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:23:25,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920747436] [2024-06-21 17:23:25,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:25,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:23:25,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:25,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:23:25,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:23:25,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:23:25,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 377 transitions, 5161 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:23:25,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:25,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:23:25,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:26,488 INFO L124 PetriNetUnfolderBase]: 3363/5122 cut-off events. [2024-06-21 17:23:26,488 INFO L125 PetriNetUnfolderBase]: For 469993/469993 co-relation queries the response was YES. [2024-06-21 17:23:26,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43014 conditions, 5122 events. 3363/5122 cut-off events. For 469993/469993 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 27617 event pairs, 673 based on Foata normal form. 6/5126 useless extension candidates. Maximal degree in co-relation 42880. Up to 4892 conditions per place. [2024-06-21 17:23:26,540 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 334 selfloop transitions, 75 changer transitions 0/412 dead transitions. [2024-06-21 17:23:26,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 412 transitions, 6213 flow [2024-06-21 17:23:26,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:23:26,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:23:26,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 17:23:26,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-21 17:23:26,542 INFO L175 Difference]: Start difference. First operand has 276 places, 377 transitions, 5161 flow. Second operand 8 states and 141 transitions. [2024-06-21 17:23:26,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 412 transitions, 6213 flow [2024-06-21 17:23:27,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 412 transitions, 5976 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-21 17:23:27,497 INFO L231 Difference]: Finished difference. Result has 278 places, 384 transitions, 5221 flow [2024-06-21 17:23:27,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4924, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5221, PETRI_PLACES=278, PETRI_TRANSITIONS=384} [2024-06-21 17:23:27,498 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 237 predicate places. [2024-06-21 17:23:27,498 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 384 transitions, 5221 flow [2024-06-21 17:23:27,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:23:27,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:27,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:27,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 17:23:27,498 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:27,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:27,499 INFO L85 PathProgramCache]: Analyzing trace with hash 144342412, now seen corresponding path program 4 times [2024-06-21 17:23:27,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:27,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821155713] [2024-06-21 17:23:27,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:27,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:27,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:28,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:28,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:28,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821155713] [2024-06-21 17:23:28,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821155713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:28,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:28,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:23:28,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436113407] [2024-06-21 17:23:28,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:28,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:23:28,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:28,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:23:28,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:23:28,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:23:28,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 384 transitions, 5221 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:23:28,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:28,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:23:28,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:29,076 INFO L124 PetriNetUnfolderBase]: 3415/5194 cut-off events. [2024-06-21 17:23:29,076 INFO L125 PetriNetUnfolderBase]: For 488430/488430 co-relation queries the response was YES. [2024-06-21 17:23:29,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44374 conditions, 5194 events. 3415/5194 cut-off events. For 488430/488430 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 27959 event pairs, 669 based on Foata normal form. 4/5196 useless extension candidates. Maximal degree in co-relation 44242. Up to 4903 conditions per place. [2024-06-21 17:23:29,142 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 336 selfloop transitions, 83 changer transitions 0/422 dead transitions. [2024-06-21 17:23:29,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 422 transitions, 6736 flow [2024-06-21 17:23:29,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:23:29,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:23:29,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 17:23:29,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-21 17:23:29,143 INFO L175 Difference]: Start difference. First operand has 278 places, 384 transitions, 5221 flow. Second operand 8 states and 138 transitions. [2024-06-21 17:23:29,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 422 transitions, 6736 flow [2024-06-21 17:23:30,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 422 transitions, 6537 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-21 17:23:30,372 INFO L231 Difference]: Finished difference. Result has 283 places, 395 transitions, 5565 flow [2024-06-21 17:23:30,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5022, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5565, PETRI_PLACES=283, PETRI_TRANSITIONS=395} [2024-06-21 17:23:30,373 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 242 predicate places. [2024-06-21 17:23:30,373 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 395 transitions, 5565 flow [2024-06-21 17:23:30,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:23:30,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:30,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:30,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 17:23:30,373 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:30,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:30,374 INFO L85 PathProgramCache]: Analyzing trace with hash 848374749, now seen corresponding path program 1 times [2024-06-21 17:23:30,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:30,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919843849] [2024-06-21 17:23:30,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:30,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:30,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:31,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:31,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:31,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919843849] [2024-06-21 17:23:31,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919843849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:31,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:31,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:23:31,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278399663] [2024-06-21 17:23:31,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:31,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:23:31,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:31,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:23:31,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:23:31,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:23:31,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 395 transitions, 5565 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:23:31,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:31,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:23:31,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:32,554 INFO L124 PetriNetUnfolderBase]: 3423/5206 cut-off events. [2024-06-21 17:23:32,554 INFO L125 PetriNetUnfolderBase]: For 496682/496682 co-relation queries the response was YES. [2024-06-21 17:23:32,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44892 conditions, 5206 events. 3423/5206 cut-off events. For 496682/496682 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 27887 event pairs, 564 based on Foata normal form. 2/5206 useless extension candidates. Maximal degree in co-relation 44757. Up to 5019 conditions per place. [2024-06-21 17:23:32,613 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 382 selfloop transitions, 44 changer transitions 0/429 dead transitions. [2024-06-21 17:23:32,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 429 transitions, 6730 flow [2024-06-21 17:23:32,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:23:32,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:23:32,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 17:23:32,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-21 17:23:32,614 INFO L175 Difference]: Start difference. First operand has 283 places, 395 transitions, 5565 flow. Second operand 8 states and 130 transitions. [2024-06-21 17:23:32,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 429 transitions, 6730 flow [2024-06-21 17:23:33,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 429 transitions, 6584 flow, removed 68 selfloop flow, removed 2 redundant places. [2024-06-21 17:23:33,998 INFO L231 Difference]: Finished difference. Result has 289 places, 399 transitions, 5580 flow [2024-06-21 17:23:33,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5419, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5580, PETRI_PLACES=289, PETRI_TRANSITIONS=399} [2024-06-21 17:23:33,999 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 248 predicate places. [2024-06-21 17:23:33,999 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 399 transitions, 5580 flow [2024-06-21 17:23:33,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:23:33,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:33,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:33,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 17:23:33,999 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:33,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:33,999 INFO L85 PathProgramCache]: Analyzing trace with hash -669314639, now seen corresponding path program 2 times [2024-06-21 17:23:33,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:33,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922666588] [2024-06-21 17:23:33,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:34,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:34,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:34,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:34,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:34,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922666588] [2024-06-21 17:23:34,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922666588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:34,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:34,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:23:34,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120037206] [2024-06-21 17:23:34,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:34,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:23:34,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:34,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:23:34,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:23:34,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:23:34,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 399 transitions, 5580 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:23:34,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:34,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:23:34,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:36,215 INFO L124 PetriNetUnfolderBase]: 3431/5218 cut-off events. [2024-06-21 17:23:36,215 INFO L125 PetriNetUnfolderBase]: For 508110/508110 co-relation queries the response was YES. [2024-06-21 17:23:36,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45069 conditions, 5218 events. 3431/5218 cut-off events. For 508110/508110 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 28115 event pairs, 676 based on Foata normal form. 2/5218 useless extension candidates. Maximal degree in co-relation 44932. Up to 5082 conditions per place. [2024-06-21 17:23:36,285 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 380 selfloop transitions, 44 changer transitions 0/427 dead transitions. [2024-06-21 17:23:36,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 427 transitions, 6562 flow [2024-06-21 17:23:36,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:23:36,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:23:36,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-21 17:23:36,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39375 [2024-06-21 17:23:36,286 INFO L175 Difference]: Start difference. First operand has 289 places, 399 transitions, 5580 flow. Second operand 8 states and 126 transitions. [2024-06-21 17:23:36,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 427 transitions, 6562 flow [2024-06-21 17:23:37,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 427 transitions, 6457 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-21 17:23:37,479 INFO L231 Difference]: Finished difference. Result has 293 places, 401 transitions, 5609 flow [2024-06-21 17:23:37,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5491, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5609, PETRI_PLACES=293, PETRI_TRANSITIONS=401} [2024-06-21 17:23:37,479 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 252 predicate places. [2024-06-21 17:23:37,479 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 401 transitions, 5609 flow [2024-06-21 17:23:37,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:23:37,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:37,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:37,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 17:23:37,480 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:37,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:37,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1149879245, now seen corresponding path program 1 times [2024-06-21 17:23:37,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:37,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569196083] [2024-06-21 17:23:37,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:37,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:37,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:37,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:37,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:37,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569196083] [2024-06-21 17:23:37,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569196083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:37,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:37,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:23:37,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657925921] [2024-06-21 17:23:37,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:37,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:23:37,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:37,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:23:37,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:23:37,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:23:37,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 401 transitions, 5609 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:23:37,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:37,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:23:37,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:39,099 INFO L124 PetriNetUnfolderBase]: 3457/5255 cut-off events. [2024-06-21 17:23:39,099 INFO L125 PetriNetUnfolderBase]: For 526460/526460 co-relation queries the response was YES. [2024-06-21 17:23:39,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45667 conditions, 5255 events. 3457/5255 cut-off events. For 526460/526460 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 28362 event pairs, 653 based on Foata normal form. 2/5255 useless extension candidates. Maximal degree in co-relation 45528. Up to 5080 conditions per place. [2024-06-21 17:23:39,171 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 383 selfloop transitions, 56 changer transitions 0/442 dead transitions. [2024-06-21 17:23:39,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 442 transitions, 6907 flow [2024-06-21 17:23:39,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:23:39,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:23:39,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 17:23:39,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-21 17:23:39,172 INFO L175 Difference]: Start difference. First operand has 293 places, 401 transitions, 5609 flow. Second operand 8 states and 132 transitions. [2024-06-21 17:23:39,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 442 transitions, 6907 flow [2024-06-21 17:23:40,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 442 transitions, 6801 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 17:23:40,930 INFO L231 Difference]: Finished difference. Result has 296 places, 414 transitions, 5821 flow [2024-06-21 17:23:40,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5513, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5821, PETRI_PLACES=296, PETRI_TRANSITIONS=414} [2024-06-21 17:23:40,930 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 255 predicate places. [2024-06-21 17:23:40,930 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 414 transitions, 5821 flow [2024-06-21 17:23:40,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:23:40,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:40,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:40,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 17:23:40,931 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:40,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:40,931 INFO L85 PathProgramCache]: Analyzing trace with hash 848674395, now seen corresponding path program 2 times [2024-06-21 17:23:40,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:40,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205134465] [2024-06-21 17:23:40,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:40,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:40,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:41,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:41,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:41,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205134465] [2024-06-21 17:23:41,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205134465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:41,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:41,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:23:41,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639499718] [2024-06-21 17:23:41,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:41,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:23:41,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:41,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:23:41,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:23:41,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:23:41,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 414 transitions, 5821 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:23:41,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:41,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:23:41,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:42,606 INFO L124 PetriNetUnfolderBase]: 3467/5269 cut-off events. [2024-06-21 17:23:42,606 INFO L125 PetriNetUnfolderBase]: For 542978/542978 co-relation queries the response was YES. [2024-06-21 17:23:42,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46654 conditions, 5269 events. 3467/5269 cut-off events. For 542978/542978 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 28416 event pairs, 674 based on Foata normal form. 2/5269 useless extension candidates. Maximal degree in co-relation 46513. Up to 5132 conditions per place. [2024-06-21 17:23:42,682 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 385 selfloop transitions, 53 changer transitions 0/441 dead transitions. [2024-06-21 17:23:42,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 441 transitions, 6847 flow [2024-06-21 17:23:42,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:23:42,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:23:42,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-21 17:23:42,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39375 [2024-06-21 17:23:42,683 INFO L175 Difference]: Start difference. First operand has 296 places, 414 transitions, 5821 flow. Second operand 8 states and 126 transitions. [2024-06-21 17:23:42,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 441 transitions, 6847 flow [2024-06-21 17:23:43,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 441 transitions, 6763 flow, removed 41 selfloop flow, removed 1 redundant places. [2024-06-21 17:23:43,891 INFO L231 Difference]: Finished difference. Result has 303 places, 418 transitions, 5924 flow [2024-06-21 17:23:43,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5755, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5924, PETRI_PLACES=303, PETRI_TRANSITIONS=418} [2024-06-21 17:23:43,892 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 262 predicate places. [2024-06-21 17:23:43,892 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 418 transitions, 5924 flow [2024-06-21 17:23:43,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:23:43,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:43,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:43,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 17:23:43,892 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:43,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:43,893 INFO L85 PathProgramCache]: Analyzing trace with hash 2039214353, now seen corresponding path program 3 times [2024-06-21 17:23:43,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:43,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117953483] [2024-06-21 17:23:43,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:43,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:43,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:44,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:44,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:44,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117953483] [2024-06-21 17:23:44,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117953483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:44,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:44,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:23:44,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748677127] [2024-06-21 17:23:44,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:44,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:23:44,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:44,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:23:44,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:23:44,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:23:44,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 418 transitions, 5924 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:23:44,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:44,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:23:44,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:45,582 INFO L124 PetriNetUnfolderBase]: 3501/5315 cut-off events. [2024-06-21 17:23:45,583 INFO L125 PetriNetUnfolderBase]: For 565294/565294 co-relation queries the response was YES. [2024-06-21 17:23:45,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47222 conditions, 5315 events. 3501/5315 cut-off events. For 565294/565294 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 28733 event pairs, 641 based on Foata normal form. 2/5315 useless extension candidates. Maximal degree in co-relation 47078. Up to 5038 conditions per place. [2024-06-21 17:23:45,655 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 375 selfloop transitions, 77 changer transitions 0/455 dead transitions. [2024-06-21 17:23:45,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 455 transitions, 7400 flow [2024-06-21 17:23:45,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:23:45,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:23:45,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 17:23:45,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-21 17:23:45,656 INFO L175 Difference]: Start difference. First operand has 303 places, 418 transitions, 5924 flow. Second operand 8 states and 133 transitions. [2024-06-21 17:23:45,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 455 transitions, 7400 flow [2024-06-21 17:23:47,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 455 transitions, 7271 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 17:23:47,314 INFO L231 Difference]: Finished difference. Result has 306 places, 427 transitions, 6129 flow [2024-06-21 17:23:47,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5795, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6129, PETRI_PLACES=306, PETRI_TRANSITIONS=427} [2024-06-21 17:23:47,314 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 265 predicate places. [2024-06-21 17:23:47,314 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 427 transitions, 6129 flow [2024-06-21 17:23:47,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:23:47,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:47,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:47,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 17:23:47,315 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:47,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:47,315 INFO L85 PathProgramCache]: Analyzing trace with hash -551103641, now seen corresponding path program 1 times [2024-06-21 17:23:47,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:47,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551072672] [2024-06-21 17:23:47,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:47,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:47,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:47,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:47,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:47,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551072672] [2024-06-21 17:23:47,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551072672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:47,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:47,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:23:47,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302400478] [2024-06-21 17:23:47,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:47,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:23:47,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:47,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:23:47,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:23:47,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:23:47,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 427 transitions, 6129 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:23:47,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:47,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:23:47,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:49,003 INFO L124 PetriNetUnfolderBase]: 3543/5373 cut-off events. [2024-06-21 17:23:49,004 INFO L125 PetriNetUnfolderBase]: For 597452/597452 co-relation queries the response was YES. [2024-06-21 17:23:49,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48841 conditions, 5373 events. 3543/5373 cut-off events. For 597452/597452 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 29073 event pairs, 685 based on Foata normal form. 2/5373 useless extension candidates. Maximal degree in co-relation 48696. Up to 5250 conditions per place. [2024-06-21 17:23:49,071 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 404 selfloop transitions, 51 changer transitions 0/458 dead transitions. [2024-06-21 17:23:49,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 458 transitions, 7539 flow [2024-06-21 17:23:49,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:23:49,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:23:49,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 17:23:49,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-21 17:23:49,072 INFO L175 Difference]: Start difference. First operand has 306 places, 427 transitions, 6129 flow. Second operand 8 states and 127 transitions. [2024-06-21 17:23:49,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 458 transitions, 7539 flow [2024-06-21 17:23:50,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 458 transitions, 7403 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-21 17:23:50,870 INFO L231 Difference]: Finished difference. Result has 311 places, 436 transitions, 6401 flow [2024-06-21 17:23:50,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5993, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6401, PETRI_PLACES=311, PETRI_TRANSITIONS=436} [2024-06-21 17:23:50,871 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 270 predicate places. [2024-06-21 17:23:50,871 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 436 transitions, 6401 flow [2024-06-21 17:23:50,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:23:50,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:50,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:50,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 17:23:50,871 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:50,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:50,871 INFO L85 PathProgramCache]: Analyzing trace with hash -551103827, now seen corresponding path program 1 times [2024-06-21 17:23:50,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:50,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394284299] [2024-06-21 17:23:50,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:50,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:50,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:51,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:51,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:51,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394284299] [2024-06-21 17:23:51,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394284299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:51,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:51,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:23:51,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530168582] [2024-06-21 17:23:51,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:51,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:23:51,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:51,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:23:51,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:23:51,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:23:51,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 436 transitions, 6401 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:23:51,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:51,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:23:51,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:52,741 INFO L124 PetriNetUnfolderBase]: 3548/5380 cut-off events. [2024-06-21 17:23:52,742 INFO L125 PetriNetUnfolderBase]: For 606837/606837 co-relation queries the response was YES. [2024-06-21 17:23:52,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48915 conditions, 5380 events. 3548/5380 cut-off events. For 606837/606837 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 29103 event pairs, 684 based on Foata normal form. 1/5379 useless extension candidates. Maximal degree in co-relation 48768. Up to 5300 conditions per place. [2024-06-21 17:23:52,804 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 420 selfloop transitions, 35 changer transitions 0/458 dead transitions. [2024-06-21 17:23:52,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 458 transitions, 7445 flow [2024-06-21 17:23:52,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:23:52,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:23:52,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-21 17:23:52,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.378125 [2024-06-21 17:23:52,805 INFO L175 Difference]: Start difference. First operand has 311 places, 436 transitions, 6401 flow. Second operand 8 states and 121 transitions. [2024-06-21 17:23:52,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 458 transitions, 7445 flow [2024-06-21 17:23:54,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 458 transitions, 7300 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-21 17:23:54,450 INFO L231 Difference]: Finished difference. Result has 315 places, 439 transitions, 6408 flow [2024-06-21 17:23:54,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6256, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6408, PETRI_PLACES=315, PETRI_TRANSITIONS=439} [2024-06-21 17:23:54,451 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 274 predicate places. [2024-06-21 17:23:54,451 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 439 transitions, 6408 flow [2024-06-21 17:23:54,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:23:54,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:54,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:54,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 17:23:54,451 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:54,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:54,452 INFO L85 PathProgramCache]: Analyzing trace with hash 2039512883, now seen corresponding path program 4 times [2024-06-21 17:23:54,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:54,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241215068] [2024-06-21 17:23:54,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:54,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:54,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:54,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:54,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:54,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241215068] [2024-06-21 17:23:54,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241215068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:54,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:54,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:23:54,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254001758] [2024-06-21 17:23:54,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:54,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:23:54,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:54,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:23:54,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:23:54,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:23:54,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 439 transitions, 6408 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:23:54,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:54,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:23:54,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:56,158 INFO L124 PetriNetUnfolderBase]: 3566/5405 cut-off events. [2024-06-21 17:23:56,158 INFO L125 PetriNetUnfolderBase]: For 625704/625704 co-relation queries the response was YES. [2024-06-21 17:23:56,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49264 conditions, 5405 events. 3566/5405 cut-off events. For 625704/625704 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 29260 event pairs, 635 based on Foata normal form. 2/5405 useless extension candidates. Maximal degree in co-relation 49116. Up to 5122 conditions per place. [2024-06-21 17:23:56,233 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 384 selfloop transitions, 83 changer transitions 0/470 dead transitions. [2024-06-21 17:23:56,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 470 transitions, 7838 flow [2024-06-21 17:23:56,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:23:56,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:23:56,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 17:23:56,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-21 17:23:56,234 INFO L175 Difference]: Start difference. First operand has 315 places, 439 transitions, 6408 flow. Second operand 8 states and 130 transitions. [2024-06-21 17:23:56,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 470 transitions, 7838 flow [2024-06-21 17:23:58,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 470 transitions, 7730 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 17:23:58,077 INFO L231 Difference]: Finished difference. Result has 317 places, 445 transitions, 6564 flow [2024-06-21 17:23:58,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6300, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6564, PETRI_PLACES=317, PETRI_TRANSITIONS=445} [2024-06-21 17:23:58,077 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 276 predicate places. [2024-06-21 17:23:58,077 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 445 transitions, 6564 flow [2024-06-21 17:23:58,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:23:58,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:58,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:58,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 17:23:58,078 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:58,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:58,078 INFO L85 PathProgramCache]: Analyzing trace with hash -373734971, now seen corresponding path program 2 times [2024-06-21 17:23:58,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:58,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420931977] [2024-06-21 17:23:58,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:58,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:58,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:58,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:58,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:58,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420931977] [2024-06-21 17:23:58,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420931977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:58,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:58,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:23:58,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170970687] [2024-06-21 17:23:58,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:58,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:23:58,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:58,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:23:58,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:23:58,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:23:58,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 445 transitions, 6564 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:23:58,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:58,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:23:58,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:59,792 INFO L124 PetriNetUnfolderBase]: 3576/5419 cut-off events. [2024-06-21 17:23:59,793 INFO L125 PetriNetUnfolderBase]: For 642723/642723 co-relation queries the response was YES. [2024-06-21 17:23:59,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49772 conditions, 5419 events. 3576/5419 cut-off events. For 642723/642723 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 29349 event pairs, 685 based on Foata normal form. 2/5419 useless extension candidates. Maximal degree in co-relation 49623. Up to 5353 conditions per place. [2024-06-21 17:23:59,874 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 430 selfloop transitions, 32 changer transitions 0/465 dead transitions. [2024-06-21 17:23:59,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 465 transitions, 7628 flow [2024-06-21 17:23:59,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:23:59,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:23:59,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-21 17:23:59,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 17:23:59,875 INFO L175 Difference]: Start difference. First operand has 317 places, 445 transitions, 6564 flow. Second operand 8 states and 120 transitions. [2024-06-21 17:23:59,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 465 transitions, 7628 flow [2024-06-21 17:24:01,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 465 transitions, 7494 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-21 17:24:01,688 INFO L231 Difference]: Finished difference. Result has 321 places, 448 transitions, 6584 flow [2024-06-21 17:24:01,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6430, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6584, PETRI_PLACES=321, PETRI_TRANSITIONS=448} [2024-06-21 17:24:01,689 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 280 predicate places. [2024-06-21 17:24:01,689 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 448 transitions, 6584 flow [2024-06-21 17:24:01,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:24:01,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:24:01,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:24:01,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 17:24:01,689 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:24:01,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:24:01,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1135681881, now seen corresponding path program 2 times [2024-06-21 17:24:01,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:24:01,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482085734] [2024-06-21 17:24:01,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:24:01,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:24:01,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:24:02,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:24:02,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:24:02,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482085734] [2024-06-21 17:24:02,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482085734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:24:02,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:24:02,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:24:02,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791493317] [2024-06-21 17:24:02,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:24:02,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:24:02,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:24:02,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:24:02,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:24:02,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:24:02,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 448 transitions, 6584 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:24:02,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:24:02,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:24:02,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:24:03,583 INFO L124 PetriNetUnfolderBase]: 3581/5426 cut-off events. [2024-06-21 17:24:03,583 INFO L125 PetriNetUnfolderBase]: For 654609/654609 co-relation queries the response was YES. [2024-06-21 17:24:03,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49896 conditions, 5426 events. 3581/5426 cut-off events. For 654609/654609 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 29343 event pairs, 684 based on Foata normal form. 1/5425 useless extension candidates. Maximal degree in co-relation 49746. Up to 5372 conditions per place. [2024-06-21 17:24:03,658 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 439 selfloop transitions, 25 changer transitions 0/467 dead transitions. [2024-06-21 17:24:03,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 467 transitions, 7640 flow [2024-06-21 17:24:03,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:24:03,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:24:03,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 117 transitions. [2024-06-21 17:24:03,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.365625 [2024-06-21 17:24:03,659 INFO L175 Difference]: Start difference. First operand has 321 places, 448 transitions, 6584 flow. Second operand 8 states and 117 transitions. [2024-06-21 17:24:03,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 467 transitions, 7640 flow [2024-06-21 17:24:05,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 467 transitions, 7487 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-21 17:24:05,487 INFO L231 Difference]: Finished difference. Result has 322 places, 451 transitions, 6569 flow [2024-06-21 17:24:05,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6431, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6569, PETRI_PLACES=322, PETRI_TRANSITIONS=451} [2024-06-21 17:24:05,488 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 281 predicate places. [2024-06-21 17:24:05,488 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 451 transitions, 6569 flow [2024-06-21 17:24:05,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:24:05,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:24:05,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:24:05,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 17:24:05,488 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:24:05,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:24:05,488 INFO L85 PathProgramCache]: Analyzing trace with hash -374092463, now seen corresponding path program 5 times [2024-06-21 17:24:05,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:24:05,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184072399] [2024-06-21 17:24:05,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:24:05,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:24:05,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:24:05,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:24:05,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:24:05,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184072399] [2024-06-21 17:24:05,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184072399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:24:05,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:24:05,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:24:05,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932516018] [2024-06-21 17:24:05,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:24:05,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:24:05,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:24:05,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:24:05,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:24:05,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:24:05,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 451 transitions, 6569 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:24:05,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:24:05,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:24:05,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:24:07,268 INFO L124 PetriNetUnfolderBase]: 3591/5440 cut-off events. [2024-06-21 17:24:07,268 INFO L125 PetriNetUnfolderBase]: For 672318/672318 co-relation queries the response was YES. [2024-06-21 17:24:07,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50038 conditions, 5440 events. 3591/5440 cut-off events. For 672318/672318 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 29426 event pairs, 678 based on Foata normal form. 2/5440 useless extension candidates. Maximal degree in co-relation 49888. Up to 5306 conditions per place. [2024-06-21 17:24:07,339 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 420 selfloop transitions, 50 changer transitions 0/473 dead transitions. [2024-06-21 17:24:07,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 473 transitions, 7638 flow [2024-06-21 17:24:07,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:24:07,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:24:07,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-21 17:24:07,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38125 [2024-06-21 17:24:07,340 INFO L175 Difference]: Start difference. First operand has 322 places, 451 transitions, 6569 flow. Second operand 8 states and 122 transitions. [2024-06-21 17:24:07,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 473 transitions, 7638 flow [2024-06-21 17:24:09,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 473 transitions, 7544 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 17:24:09,324 INFO L231 Difference]: Finished difference. Result has 325 places, 455 transitions, 6658 flow [2024-06-21 17:24:09,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6475, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6658, PETRI_PLACES=325, PETRI_TRANSITIONS=455} [2024-06-21 17:24:09,325 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 284 predicate places. [2024-06-21 17:24:09,325 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 455 transitions, 6658 flow [2024-06-21 17:24:09,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:24:09,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:24:09,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:24:09,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 17:24:09,325 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:24:09,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:24:09,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1135681695, now seen corresponding path program 6 times [2024-06-21 17:24:09,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:24:09,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743043995] [2024-06-21 17:24:09,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:24:09,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:24:09,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:24:09,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:24:09,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:24:09,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743043995] [2024-06-21 17:24:09,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743043995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:24:09,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:24:09,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:24:09,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693952136] [2024-06-21 17:24:09,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:24:09,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:24:09,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:24:09,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:24:09,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:24:09,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:24:09,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 455 transitions, 6658 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:24:09,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:24:09,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:24:09,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:24:11,027 INFO L124 PetriNetUnfolderBase]: 3609/5465 cut-off events. [2024-06-21 17:24:11,027 INFO L125 PetriNetUnfolderBase]: For 691610/691610 co-relation queries the response was YES. [2024-06-21 17:24:11,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50545 conditions, 5465 events. 3609/5465 cut-off events. For 691610/691610 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 29565 event pairs, 678 based on Foata normal form. 2/5465 useless extension candidates. Maximal degree in co-relation 50393. Up to 5306 conditions per place. [2024-06-21 17:24:11,103 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 418 selfloop transitions, 60 changer transitions 0/481 dead transitions. [2024-06-21 17:24:11,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 481 transitions, 7948 flow [2024-06-21 17:24:11,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:24:11,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:24:11,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-21 17:24:11,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.390625 [2024-06-21 17:24:11,104 INFO L175 Difference]: Start difference. First operand has 325 places, 455 transitions, 6658 flow. Second operand 8 states and 125 transitions. [2024-06-21 17:24:11,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 481 transitions, 7948 flow [2024-06-21 17:24:13,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 481 transitions, 7843 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 17:24:13,129 INFO L231 Difference]: Finished difference. Result has 330 places, 461 transitions, 6808 flow [2024-06-21 17:24:13,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6553, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6808, PETRI_PLACES=330, PETRI_TRANSITIONS=461} [2024-06-21 17:24:13,129 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 289 predicate places. [2024-06-21 17:24:13,130 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 461 transitions, 6808 flow [2024-06-21 17:24:13,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:24:13,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:24:13,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:24:13,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 17:24:13,130 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:24:13,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:24:13,130 INFO L85 PathProgramCache]: Analyzing trace with hash -373972121, now seen corresponding path program 3 times [2024-06-21 17:24:13,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:24:13,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81403127] [2024-06-21 17:24:13,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:24:13,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:24:13,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:24:13,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:24:13,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:24:13,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81403127] [2024-06-21 17:24:13,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81403127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:24:13,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:24:13,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:24:13,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106604454] [2024-06-21 17:24:13,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:24:13,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:24:13,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:24:13,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:24:13,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:24:13,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:24:13,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 461 transitions, 6808 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:24:13,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:24:13,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:24:13,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:24:14,813 INFO L124 PetriNetUnfolderBase]: 3603/5457 cut-off events. [2024-06-21 17:24:14,813 INFO L125 PetriNetUnfolderBase]: For 700405/700405 co-relation queries the response was YES. [2024-06-21 17:24:14,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50540 conditions, 5457 events. 3603/5457 cut-off events. For 700405/700405 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 29481 event pairs, 684 based on Foata normal form. 2/5457 useless extension candidates. Maximal degree in co-relation 50386. Up to 5382 conditions per place. [2024-06-21 17:24:14,891 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 439 selfloop transitions, 37 changer transitions 0/479 dead transitions. [2024-06-21 17:24:14,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 479 transitions, 7832 flow [2024-06-21 17:24:14,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:24:14,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:24:14,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-21 17:24:14,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.384375 [2024-06-21 17:24:14,892 INFO L175 Difference]: Start difference. First operand has 330 places, 461 transitions, 6808 flow. Second operand 8 states and 123 transitions. [2024-06-21 17:24:14,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 479 transitions, 7832 flow [2024-06-21 17:24:16,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 479 transitions, 7701 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 17:24:16,874 INFO L231 Difference]: Finished difference. Result has 333 places, 461 transitions, 6757 flow [2024-06-21 17:24:16,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6677, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6757, PETRI_PLACES=333, PETRI_TRANSITIONS=461} [2024-06-21 17:24:16,875 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 292 predicate places. [2024-06-21 17:24:16,875 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 461 transitions, 6757 flow [2024-06-21 17:24:16,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:24:16,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:24:16,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:24:16,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 17:24:16,875 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:24:16,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:24:16,875 INFO L85 PathProgramCache]: Analyzing trace with hash -2078445839, now seen corresponding path program 3 times [2024-06-21 17:24:16,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:24:16,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648507675] [2024-06-21 17:24:16,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:24:16,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:24:16,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:24:17,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:24:17,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:24:17,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648507675] [2024-06-21 17:24:17,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648507675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:24:17,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:24:17,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:24:17,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5321904] [2024-06-21 17:24:17,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:24:17,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:24:17,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:24:17,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:24:17,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:24:17,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:24:17,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 461 transitions, 6757 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:24:17,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:24:17,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:24:17,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:24:19,154 INFO L124 PetriNetUnfolderBase]: 3611/5469 cut-off events. [2024-06-21 17:24:19,154 INFO L125 PetriNetUnfolderBase]: For 715603/715603 co-relation queries the response was YES. [2024-06-21 17:24:19,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50701 conditions, 5469 events. 3611/5469 cut-off events. For 715603/715603 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 29572 event pairs, 677 based on Foata normal form. 2/5469 useless extension candidates. Maximal degree in co-relation 50546. Up to 5335 conditions per place. [2024-06-21 17:24:19,229 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 430 selfloop transitions, 48 changer transitions 0/481 dead transitions. [2024-06-21 17:24:19,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 481 transitions, 7797 flow [2024-06-21 17:24:19,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:24:19,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:24:19,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-21 17:24:19,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38125 [2024-06-21 17:24:19,230 INFO L175 Difference]: Start difference. First operand has 333 places, 461 transitions, 6757 flow. Second operand 8 states and 122 transitions. [2024-06-21 17:24:19,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 481 transitions, 7797 flow [2024-06-21 17:24:21,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 481 transitions, 7667 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 17:24:21,688 INFO L231 Difference]: Finished difference. Result has 335 places, 463 transitions, 6756 flow [2024-06-21 17:24:21,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6627, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6756, PETRI_PLACES=335, PETRI_TRANSITIONS=463} [2024-06-21 17:24:21,689 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 294 predicate places. [2024-06-21 17:24:21,689 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 463 transitions, 6756 flow [2024-06-21 17:24:21,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:24:21,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:24:21,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:24:21,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 17:24:21,690 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:24:21,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:24:21,690 INFO L85 PathProgramCache]: Analyzing trace with hash -2078076443, now seen corresponding path program 1 times [2024-06-21 17:24:21,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:24:21,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337516136] [2024-06-21 17:24:21,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:24:21,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:24:21,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:24:22,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:24:22,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:24:22,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337516136] [2024-06-21 17:24:22,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337516136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:24:22,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:24:22,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:24:22,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193732156] [2024-06-21 17:24:22,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:24:22,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:24:22,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:24:22,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:24:22,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:24:22,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:24:22,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 463 transitions, 6756 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:24:22,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:24:22,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:24:22,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:24:24,220 INFO L124 PetriNetUnfolderBase]: 3619/5481 cut-off events. [2024-06-21 17:24:24,220 INFO L125 PetriNetUnfolderBase]: For 731764/731764 co-relation queries the response was YES. [2024-06-21 17:24:24,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50962 conditions, 5481 events. 3619/5481 cut-off events. For 731764/731764 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 29665 event pairs, 685 based on Foata normal form. 2/5481 useless extension candidates. Maximal degree in co-relation 50806. Up to 5401 conditions per place. [2024-06-21 17:24:24,286 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 440 selfloop transitions, 39 changer transitions 0/482 dead transitions. [2024-06-21 17:24:24,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 482 transitions, 7822 flow [2024-06-21 17:24:24,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:24:24,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:24:24,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-21 17:24:24,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38125 [2024-06-21 17:24:24,287 INFO L175 Difference]: Start difference. First operand has 335 places, 463 transitions, 6756 flow. Second operand 8 states and 122 transitions. [2024-06-21 17:24:24,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 482 transitions, 7822 flow [2024-06-21 17:24:26,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 482 transitions, 7713 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 17:24:26,246 INFO L231 Difference]: Finished difference. Result has 337 places, 465 transitions, 6788 flow [2024-06-21 17:24:26,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6647, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6788, PETRI_PLACES=337, PETRI_TRANSITIONS=465} [2024-06-21 17:24:26,247 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 296 predicate places. [2024-06-21 17:24:26,247 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 465 transitions, 6788 flow [2024-06-21 17:24:26,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:24:26,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:24:26,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:24:26,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 17:24:26,247 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:24:26,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:24:26,247 INFO L85 PathProgramCache]: Analyzing trace with hash 463913233, now seen corresponding path program 7 times [2024-06-21 17:24:26,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:24:26,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739812991] [2024-06-21 17:24:26,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:24:26,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:24:26,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:24:26,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:24:26,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:24:26,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739812991] [2024-06-21 17:24:26,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739812991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:24:26,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:24:26,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:24:26,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220795396] [2024-06-21 17:24:26,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:24:26,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:24:26,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:24:26,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:24:26,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:24:26,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:24:26,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 465 transitions, 6788 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:24:26,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:24:26,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:24:26,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:24:27,974 INFO L124 PetriNetUnfolderBase]: 3697/5595 cut-off events. [2024-06-21 17:24:27,974 INFO L125 PetriNetUnfolderBase]: For 789417/789420 co-relation queries the response was YES. [2024-06-21 17:24:28,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52534 conditions, 5595 events. 3697/5595 cut-off events. For 789417/789420 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 30394 event pairs, 631 based on Foata normal form. 8/5590 useless extension candidates. Maximal degree in co-relation 52377. Up to 4621 conditions per place. [2024-06-21 17:24:28,057 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 357 selfloop transitions, 150 changer transitions 0/510 dead transitions. [2024-06-21 17:24:28,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 510 transitions, 8758 flow [2024-06-21 17:24:28,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:24:28,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:24:28,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 17:24:28,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446875 [2024-06-21 17:24:28,058 INFO L175 Difference]: Start difference. First operand has 337 places, 465 transitions, 6788 flow. Second operand 8 states and 143 transitions. [2024-06-21 17:24:28,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 510 transitions, 8758 flow [2024-06-21 17:24:30,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 510 transitions, 8633 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 17:24:30,372 INFO L231 Difference]: Finished difference. Result has 341 places, 482 transitions, 7355 flow [2024-06-21 17:24:30,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6663, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7355, PETRI_PLACES=341, PETRI_TRANSITIONS=482} [2024-06-21 17:24:30,373 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 300 predicate places. [2024-06-21 17:24:30,373 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 482 transitions, 7355 flow [2024-06-21 17:24:30,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:24:30,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:24:30,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:24:30,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 17:24:30,373 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:24:30,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:24:30,373 INFO L85 PathProgramCache]: Analyzing trace with hash 464211949, now seen corresponding path program 3 times [2024-06-21 17:24:30,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:24:30,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214717460] [2024-06-21 17:24:30,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:24:30,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:24:30,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:24:30,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:24:30,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:24:30,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214717460] [2024-06-21 17:24:30,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214717460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:24:30,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:24:30,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:24:30,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964483884] [2024-06-21 17:24:30,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:24:30,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:24:30,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:24:30,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:24:30,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:24:30,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:24:30,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 482 transitions, 7355 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:24:30,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:24:30,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:24:30,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:24:32,141 INFO L124 PetriNetUnfolderBase]: 3694/5587 cut-off events. [2024-06-21 17:24:32,141 INFO L125 PetriNetUnfolderBase]: For 788804/788831 co-relation queries the response was YES. [2024-06-21 17:24:32,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53965 conditions, 5587 events. 3694/5587 cut-off events. For 788804/788831 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 30303 event pairs, 702 based on Foata normal form. 19/5600 useless extension candidates. Maximal degree in co-relation 53805. Up to 5396 conditions per place. [2024-06-21 17:24:32,222 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 426 selfloop transitions, 71 changer transitions 0/500 dead transitions. [2024-06-21 17:24:32,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 500 transitions, 8583 flow [2024-06-21 17:24:32,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:24:32,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:24:32,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-21 17:24:32,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-21 17:24:32,223 INFO L175 Difference]: Start difference. First operand has 341 places, 482 transitions, 7355 flow. Second operand 8 states and 124 transitions. [2024-06-21 17:24:32,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 500 transitions, 8583 flow [2024-06-21 17:24:34,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 500 transitions, 8363 flow, removed 91 selfloop flow, removed 2 redundant places. [2024-06-21 17:24:34,648 INFO L231 Difference]: Finished difference. Result has 347 places, 482 transitions, 7283 flow [2024-06-21 17:24:34,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7135, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7283, PETRI_PLACES=347, PETRI_TRANSITIONS=482} [2024-06-21 17:24:34,652 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 306 predicate places. [2024-06-21 17:24:34,652 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 482 transitions, 7283 flow [2024-06-21 17:24:34,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:24:34,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:24:34,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:24:34,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 17:24:34,653 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:24:34,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:24:34,653 INFO L85 PathProgramCache]: Analyzing trace with hash 464212135, now seen corresponding path program 4 times [2024-06-21 17:24:34,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:24:34,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539121659] [2024-06-21 17:24:34,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:24:34,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:24:34,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:24:35,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:24:35,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:24:35,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539121659] [2024-06-21 17:24:35,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539121659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:24:35,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:24:35,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:24:35,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762383849] [2024-06-21 17:24:35,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:24:35,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:24:35,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:24:35,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:24:35,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:24:35,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:24:35,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 482 transitions, 7283 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:24:35,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:24:35,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:24:35,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:24:36,472 INFO L124 PetriNetUnfolderBase]: 3698/5593 cut-off events. [2024-06-21 17:24:36,472 INFO L125 PetriNetUnfolderBase]: For 806560/806587 co-relation queries the response was YES. [2024-06-21 17:24:36,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53472 conditions, 5593 events. 3698/5593 cut-off events. For 806560/806587 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 30354 event pairs, 674 based on Foata normal form. 22/5609 useless extension candidates. Maximal degree in co-relation 53310. Up to 5061 conditions per place. [2024-06-21 17:24:36,555 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 363 selfloop transitions, 141 changer transitions 0/507 dead transitions. [2024-06-21 17:24:36,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 507 transitions, 8830 flow [2024-06-21 17:24:36,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:24:36,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:24:36,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 17:24:36,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-21 17:24:36,556 INFO L175 Difference]: Start difference. First operand has 347 places, 482 transitions, 7283 flow. Second operand 8 states and 132 transitions. [2024-06-21 17:24:36,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 507 transitions, 8830 flow [2024-06-21 17:24:38,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 507 transitions, 8658 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 17:24:38,864 INFO L231 Difference]: Finished difference. Result has 349 places, 485 transitions, 7495 flow [2024-06-21 17:24:38,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7111, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7495, PETRI_PLACES=349, PETRI_TRANSITIONS=485} [2024-06-21 17:24:38,864 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 308 predicate places. [2024-06-21 17:24:38,864 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 485 transitions, 7495 flow [2024-06-21 17:24:38,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:24:38,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:24:38,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:24:38,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 17:24:38,865 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:24:38,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:24:38,865 INFO L85 PathProgramCache]: Analyzing trace with hash 328255835, now seen corresponding path program 8 times [2024-06-21 17:24:38,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:24:38,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116790089] [2024-06-21 17:24:38,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:24:38,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:24:38,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:24:39,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:24:39,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:24:39,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116790089] [2024-06-21 17:24:39,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116790089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:24:39,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:24:39,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:24:39,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095606481] [2024-06-21 17:24:39,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:24:39,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:24:39,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:24:39,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:24:39,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:24:39,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:24:39,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 485 transitions, 7495 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:24:39,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:24:39,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:24:39,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:24:40,728 INFO L124 PetriNetUnfolderBase]: 3756/5678 cut-off events. [2024-06-21 17:24:40,729 INFO L125 PetriNetUnfolderBase]: For 844152/844155 co-relation queries the response was YES. [2024-06-21 17:24:40,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54824 conditions, 5678 events. 3756/5678 cut-off events. For 844152/844155 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 30849 event pairs, 656 based on Foata normal form. 8/5673 useless extension candidates. Maximal degree in co-relation 54661. Up to 4674 conditions per place. [2024-06-21 17:24:40,817 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 363 selfloop transitions, 153 changer transitions 0/519 dead transitions. [2024-06-21 17:24:40,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 519 transitions, 9326 flow [2024-06-21 17:24:40,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:24:40,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:24:40,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 17:24:40,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 17:24:40,820 INFO L175 Difference]: Start difference. First operand has 349 places, 485 transitions, 7495 flow. Second operand 8 states and 140 transitions. [2024-06-21 17:24:40,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 519 transitions, 9326 flow [2024-06-21 17:24:43,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 519 transitions, 8814 flow, removed 61 selfloop flow, removed 8 redundant places. [2024-06-21 17:24:43,499 INFO L231 Difference]: Finished difference. Result has 350 places, 494 transitions, 7465 flow [2024-06-21 17:24:43,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6983, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7465, PETRI_PLACES=350, PETRI_TRANSITIONS=494} [2024-06-21 17:24:43,499 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 309 predicate places. [2024-06-21 17:24:43,500 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 494 transitions, 7465 flow [2024-06-21 17:24:43,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:24:43,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:24:43,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:24:43,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 17:24:43,500 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:24:43,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:24:43,501 INFO L85 PathProgramCache]: Analyzing trace with hash 556365491, now seen corresponding path program 4 times [2024-06-21 17:24:43,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:24:43,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811912226] [2024-06-21 17:24:43,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:24:43,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:24:43,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:24:44,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:24:44,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:24:44,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811912226] [2024-06-21 17:24:44,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811912226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:24:44,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:24:44,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:24:44,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393958516] [2024-06-21 17:24:44,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:24:44,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:24:44,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:24:44,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:24:44,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:24:44,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:24:44,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 494 transitions, 7465 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:24:44,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:24:44,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:24:44,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:24:45,394 INFO L124 PetriNetUnfolderBase]: 3753/5670 cut-off events. [2024-06-21 17:24:45,394 INFO L125 PetriNetUnfolderBase]: For 833900/833927 co-relation queries the response was YES. [2024-06-21 17:24:45,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54528 conditions, 5670 events. 3753/5670 cut-off events. For 833900/833927 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 30821 event pairs, 706 based on Foata normal form. 19/5683 useless extension candidates. Maximal degree in co-relation 54365. Up to 5480 conditions per place. [2024-06-21 17:24:45,484 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 432 selfloop transitions, 76 changer transitions 0/511 dead transitions. [2024-06-21 17:24:45,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 511 transitions, 8539 flow [2024-06-21 17:24:45,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:24:45,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:24:45,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-21 17:24:45,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.384375 [2024-06-21 17:24:45,485 INFO L175 Difference]: Start difference. First operand has 350 places, 494 transitions, 7465 flow. Second operand 8 states and 123 transitions. [2024-06-21 17:24:45,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 511 transitions, 8539 flow [2024-06-21 17:24:48,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 511 transitions, 8212 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-21 17:24:48,088 INFO L231 Difference]: Finished difference. Result has 354 places, 494 transitions, 7296 flow [2024-06-21 17:24:48,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7138, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7296, PETRI_PLACES=354, PETRI_TRANSITIONS=494} [2024-06-21 17:24:48,088 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 313 predicate places. [2024-06-21 17:24:48,088 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 494 transitions, 7296 flow [2024-06-21 17:24:48,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:24:48,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:24:48,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:24:48,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 17:24:48,089 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:24:48,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:24:48,089 INFO L85 PathProgramCache]: Analyzing trace with hash -2079638289, now seen corresponding path program 9 times [2024-06-21 17:24:48,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:24:48,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753603107] [2024-06-21 17:24:48,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:24:48,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:24:48,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:24:48,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:24:48,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:24:48,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753603107] [2024-06-21 17:24:48,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753603107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:24:48,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:24:48,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:24:48,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292635116] [2024-06-21 17:24:48,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:24:48,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:24:48,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:24:48,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:24:48,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:24:48,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:24:48,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 494 transitions, 7296 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:24:48,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:24:48,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:24:48,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:24:50,079 INFO L124 PetriNetUnfolderBase]: 4023/6044 cut-off events. [2024-06-21 17:24:50,079 INFO L125 PetriNetUnfolderBase]: For 1004886/1004886 co-relation queries the response was YES. [2024-06-21 17:24:50,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59021 conditions, 6044 events. 4023/6044 cut-off events. For 1004886/1004886 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 32806 event pairs, 679 based on Foata normal form. 18/6060 useless extension candidates. Maximal degree in co-relation 58857. Up to 5685 conditions per place. [2024-06-21 17:24:50,176 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 471 selfloop transitions, 70 changer transitions 0/544 dead transitions. [2024-06-21 17:24:50,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 544 transitions, 9342 flow [2024-06-21 17:24:50,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:24:50,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:24:50,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 17:24:50,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 17:24:50,177 INFO L175 Difference]: Start difference. First operand has 354 places, 494 transitions, 7296 flow. Second operand 9 states and 150 transitions. [2024-06-21 17:24:50,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 544 transitions, 9342 flow [2024-06-21 17:24:53,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 544 transitions, 9170 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 17:24:53,488 INFO L231 Difference]: Finished difference. Result has 359 places, 518 transitions, 7808 flow [2024-06-21 17:24:53,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7124, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7808, PETRI_PLACES=359, PETRI_TRANSITIONS=518} [2024-06-21 17:24:53,489 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 318 predicate places. [2024-06-21 17:24:53,489 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 518 transitions, 7808 flow [2024-06-21 17:24:53,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:24:53,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:24:53,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:24:53,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 17:24:53,489 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:24:53,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:24:53,489 INFO L85 PathProgramCache]: Analyzing trace with hash -2079637917, now seen corresponding path program 5 times [2024-06-21 17:24:53,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:24:53,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282031229] [2024-06-21 17:24:53,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:24:53,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:24:53,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:24:54,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:24:54,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:24:54,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282031229] [2024-06-21 17:24:54,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282031229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:24:54,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:24:54,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:24:54,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108746396] [2024-06-21 17:24:54,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:24:54,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:24:54,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:24:54,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:24:54,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:24:54,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:24:54,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 518 transitions, 7808 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:24:54,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:24:54,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:24:54,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:24:55,649 INFO L124 PetriNetUnfolderBase]: 4027/6050 cut-off events. [2024-06-21 17:24:55,649 INFO L125 PetriNetUnfolderBase]: For 964493/964493 co-relation queries the response was YES. [2024-06-21 17:24:55,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60277 conditions, 6050 events. 4027/6050 cut-off events. For 964493/964493 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 32890 event pairs, 685 based on Foata normal form. 4/6052 useless extension candidates. Maximal degree in co-relation 60110. Up to 5903 conditions per place. [2024-06-21 17:24:55,740 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 486 selfloop transitions, 54 changer transitions 0/543 dead transitions. [2024-06-21 17:24:55,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 543 transitions, 9426 flow [2024-06-21 17:24:55,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:24:55,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:24:55,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-21 17:24:55,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-21 17:24:55,741 INFO L175 Difference]: Start difference. First operand has 359 places, 518 transitions, 7808 flow. Second operand 9 states and 140 transitions. [2024-06-21 17:24:55,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 543 transitions, 9426 flow [2024-06-21 17:24:59,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 543 transitions, 9182 flow, removed 102 selfloop flow, removed 4 redundant places. [2024-06-21 17:24:59,203 INFO L231 Difference]: Finished difference. Result has 364 places, 521 transitions, 7747 flow [2024-06-21 17:24:59,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7564, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7747, PETRI_PLACES=364, PETRI_TRANSITIONS=521} [2024-06-21 17:24:59,203 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 323 predicate places. [2024-06-21 17:24:59,204 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 521 transitions, 7747 flow [2024-06-21 17:24:59,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:24:59,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:24:59,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:24:59,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 17:24:59,204 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:24:59,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:24:59,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1899016595, now seen corresponding path program 6 times [2024-06-21 17:24:59,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:24:59,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133422134] [2024-06-21 17:24:59,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:24:59,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:24:59,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:24:59,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:24:59,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:24:59,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133422134] [2024-06-21 17:24:59,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133422134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:24:59,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:24:59,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:24:59,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697337963] [2024-06-21 17:24:59,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:24:59,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:24:59,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:24:59,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:24:59,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:24:59,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:24:59,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 521 transitions, 7747 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:24:59,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:24:59,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:24:59,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:01,194 INFO L124 PetriNetUnfolderBase]: 4037/6063 cut-off events. [2024-06-21 17:25:01,194 INFO L125 PetriNetUnfolderBase]: For 979643/979643 co-relation queries the response was YES. [2024-06-21 17:25:01,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60016 conditions, 6063 events. 4037/6063 cut-off events. For 979643/979643 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 32907 event pairs, 753 based on Foata normal form. 2/6063 useless extension candidates. Maximal degree in co-relation 59847. Up to 5969 conditions per place. [2024-06-21 17:25:01,275 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 501 selfloop transitions, 41 changer transitions 0/545 dead transitions. [2024-06-21 17:25:01,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 545 transitions, 9173 flow [2024-06-21 17:25:01,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:25:01,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:25:01,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 17:25:01,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-21 17:25:01,277 INFO L175 Difference]: Start difference. First operand has 364 places, 521 transitions, 7747 flow. Second operand 7 states and 116 transitions. [2024-06-21 17:25:01,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 545 transitions, 9173 flow [2024-06-21 17:25:04,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 545 transitions, 9007 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-21 17:25:04,331 INFO L231 Difference]: Finished difference. Result has 364 places, 524 transitions, 7741 flow [2024-06-21 17:25:04,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7581, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7741, PETRI_PLACES=364, PETRI_TRANSITIONS=524} [2024-06-21 17:25:04,331 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 323 predicate places. [2024-06-21 17:25:04,331 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 524 transitions, 7741 flow [2024-06-21 17:25:04,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:25:04,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:04,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:25:04,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 17:25:04,332 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:25:04,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:04,332 INFO L85 PathProgramCache]: Analyzing trace with hash 179813219, now seen corresponding path program 7 times [2024-06-21 17:25:04,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:04,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881926745] [2024-06-21 17:25:04,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:04,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:04,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:04,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:04,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:04,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881926745] [2024-06-21 17:25:04,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881926745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:04,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:04,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:25:04,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818873175] [2024-06-21 17:25:04,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:04,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:25:04,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:04,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:25:04,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:25:04,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:25:04,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 524 transitions, 7741 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:25:04,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:04,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:25:04,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:06,472 INFO L124 PetriNetUnfolderBase]: 4021/6042 cut-off events. [2024-06-21 17:25:06,472 INFO L125 PetriNetUnfolderBase]: For 991430/991430 co-relation queries the response was YES. [2024-06-21 17:25:06,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59438 conditions, 6042 events. 4021/6042 cut-off events. For 991430/991430 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 32845 event pairs, 684 based on Foata normal form. 4/6044 useless extension candidates. Maximal degree in co-relation 59269. Up to 5921 conditions per place. [2024-06-21 17:25:06,551 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 497 selfloop transitions, 42 changer transitions 0/542 dead transitions. [2024-06-21 17:25:06,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 542 transitions, 8905 flow [2024-06-21 17:25:06,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:25:06,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:25:06,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-21 17:25:06,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38125 [2024-06-21 17:25:06,552 INFO L175 Difference]: Start difference. First operand has 364 places, 524 transitions, 7741 flow. Second operand 8 states and 122 transitions. [2024-06-21 17:25:06,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 542 transitions, 8905 flow [2024-06-21 17:25:09,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 542 transitions, 8721 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-21 17:25:09,024 INFO L231 Difference]: Finished difference. Result has 367 places, 524 transitions, 7655 flow [2024-06-21 17:25:09,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7557, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7655, PETRI_PLACES=367, PETRI_TRANSITIONS=524} [2024-06-21 17:25:09,024 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 326 predicate places. [2024-06-21 17:25:09,024 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 524 transitions, 7655 flow [2024-06-21 17:25:09,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:25:09,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:09,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:25:09,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 17:25:09,024 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:25:09,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:09,025 INFO L85 PathProgramCache]: Analyzing trace with hash 179397509, now seen corresponding path program 8 times [2024-06-21 17:25:09,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:09,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953722224] [2024-06-21 17:25:09,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:09,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:09,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:09,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:09,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:09,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953722224] [2024-06-21 17:25:09,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953722224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:09,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:09,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:25:09,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215615130] [2024-06-21 17:25:09,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:09,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:25:09,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:09,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:25:09,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:25:09,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:25:09,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 524 transitions, 7655 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:25:09,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:09,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:25:09,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:11,006 INFO L124 PetriNetUnfolderBase]: 4025/6047 cut-off events. [2024-06-21 17:25:11,007 INFO L125 PetriNetUnfolderBase]: For 1002628/1002628 co-relation queries the response was YES. [2024-06-21 17:25:11,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59424 conditions, 6047 events. 4025/6047 cut-off events. For 1002628/1002628 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 32870 event pairs, 732 based on Foata normal form. 4/6049 useless extension candidates. Maximal degree in co-relation 59254. Up to 5745 conditions per place. [2024-06-21 17:25:11,101 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 465 selfloop transitions, 86 changer transitions 0/554 dead transitions. [2024-06-21 17:25:11,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 554 transitions, 9335 flow [2024-06-21 17:25:11,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:25:11,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:25:11,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 17:25:11,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-21 17:25:11,102 INFO L175 Difference]: Start difference. First operand has 367 places, 524 transitions, 7655 flow. Second operand 8 states and 138 transitions. [2024-06-21 17:25:11,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 554 transitions, 9335 flow [2024-06-21 17:25:14,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 554 transitions, 9251 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 17:25:14,889 INFO L231 Difference]: Finished difference. Result has 368 places, 527 transitions, 7838 flow [2024-06-21 17:25:14,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7571, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7838, PETRI_PLACES=368, PETRI_TRANSITIONS=527} [2024-06-21 17:25:14,889 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 327 predicate places. [2024-06-21 17:25:14,889 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 527 transitions, 7838 flow [2024-06-21 17:25:14,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:25:14,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:14,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:25:14,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 17:25:14,890 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:25:14,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:14,890 INFO L85 PathProgramCache]: Analyzing trace with hash 179397137, now seen corresponding path program 10 times [2024-06-21 17:25:14,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:14,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135077979] [2024-06-21 17:25:14,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:14,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:14,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:15,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:15,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:15,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135077979] [2024-06-21 17:25:15,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135077979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:15,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:15,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:25:15,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536389331] [2024-06-21 17:25:15,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:15,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:25:15,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:15,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:25:15,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:25:15,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:25:15,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 527 transitions, 7838 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:25:15,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:15,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:25:15,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:17,047 INFO L124 PetriNetUnfolderBase]: 4367/6522 cut-off events. [2024-06-21 17:25:17,047 INFO L125 PetriNetUnfolderBase]: For 1222304/1222304 co-relation queries the response was YES. [2024-06-21 17:25:17,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66973 conditions, 6522 events. 4367/6522 cut-off events. For 1222304/1222304 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 35539 event pairs, 694 based on Foata normal form. 18/6538 useless extension candidates. Maximal degree in co-relation 66802. Up to 5490 conditions per place. [2024-06-21 17:25:17,150 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 438 selfloop transitions, 153 changer transitions 0/594 dead transitions. [2024-06-21 17:25:17,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 594 transitions, 10234 flow [2024-06-21 17:25:17,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:25:17,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:25:17,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 17:25:17,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.484375 [2024-06-21 17:25:17,151 INFO L175 Difference]: Start difference. First operand has 368 places, 527 transitions, 7838 flow. Second operand 8 states and 155 transitions. [2024-06-21 17:25:17,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 594 transitions, 10234 flow [2024-06-21 17:25:21,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 594 transitions, 9940 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-21 17:25:21,590 INFO L231 Difference]: Finished difference. Result has 372 places, 552 transitions, 8574 flow [2024-06-21 17:25:21,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7544, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8574, PETRI_PLACES=372, PETRI_TRANSITIONS=552} [2024-06-21 17:25:21,590 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 331 predicate places. [2024-06-21 17:25:21,590 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 552 transitions, 8574 flow [2024-06-21 17:25:21,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:25:21,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:21,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:25:21,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 17:25:21,591 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:25:21,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:21,591 INFO L85 PathProgramCache]: Analyzing trace with hash 2145647, now seen corresponding path program 11 times [2024-06-21 17:25:21,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:21,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282997133] [2024-06-21 17:25:21,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:21,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:21,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:22,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:22,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:22,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282997133] [2024-06-21 17:25:22,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282997133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:22,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:22,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:25:22,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987956321] [2024-06-21 17:25:22,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:22,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:25:22,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:22,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:25:22,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:25:22,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:25:22,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 552 transitions, 8574 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:25:22,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:22,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:25:22,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:23,837 INFO L124 PetriNetUnfolderBase]: 4381/6543 cut-off events. [2024-06-21 17:25:23,837 INFO L125 PetriNetUnfolderBase]: For 1185118/1185118 co-relation queries the response was YES. [2024-06-21 17:25:23,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69072 conditions, 6543 events. 4381/6543 cut-off events. For 1185118/1185118 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 35645 event pairs, 766 based on Foata normal form. 6/6547 useless extension candidates. Maximal degree in co-relation 68898. Up to 6363 conditions per place. [2024-06-21 17:25:23,955 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 523 selfloop transitions, 59 changer transitions 0/585 dead transitions. [2024-06-21 17:25:23,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 585 transitions, 9948 flow [2024-06-21 17:25:23,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:25:23,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:25:23,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 17:25:23,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-21 17:25:23,956 INFO L175 Difference]: Start difference. First operand has 372 places, 552 transitions, 8574 flow. Second operand 7 states and 128 transitions. [2024-06-21 17:25:23,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 585 transitions, 9948 flow [2024-06-21 17:25:28,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 585 transitions, 9689 flow, removed 107 selfloop flow, removed 3 redundant places. [2024-06-21 17:25:28,238 INFO L231 Difference]: Finished difference. Result has 377 places, 557 transitions, 8568 flow [2024-06-21 17:25:28,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8321, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8568, PETRI_PLACES=377, PETRI_TRANSITIONS=557} [2024-06-21 17:25:28,238 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 336 predicate places. [2024-06-21 17:25:28,238 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 557 transitions, 8568 flow [2024-06-21 17:25:28,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:25:28,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:28,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:25:28,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 17:25:28,239 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:25:28,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:28,239 INFO L85 PathProgramCache]: Analyzing trace with hash 2503139, now seen corresponding path program 9 times [2024-06-21 17:25:28,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:28,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071443392] [2024-06-21 17:25:28,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:28,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:28,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:28,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:28,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:28,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071443392] [2024-06-21 17:25:28,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071443392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:28,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:28,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:25:28,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985136050] [2024-06-21 17:25:28,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:28,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:25:28,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:28,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:25:28,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:25:28,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:25:28,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 557 transitions, 8568 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:25:28,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:28,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:25:28,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:30,350 INFO L124 PetriNetUnfolderBase]: 4375/6534 cut-off events. [2024-06-21 17:25:30,351 INFO L125 PetriNetUnfolderBase]: For 1180862/1180862 co-relation queries the response was YES. [2024-06-21 17:25:30,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68452 conditions, 6534 events. 4375/6534 cut-off events. For 1180862/1180862 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 35648 event pairs, 790 based on Foata normal form. 2/6534 useless extension candidates. Maximal degree in co-relation 68275. Up to 6476 conditions per place. [2024-06-21 17:25:30,459 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 543 selfloop transitions, 27 changer transitions 0/573 dead transitions. [2024-06-21 17:25:30,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 573 transitions, 9768 flow [2024-06-21 17:25:30,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:25:30,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:25:30,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-21 17:25:30,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3892857142857143 [2024-06-21 17:25:30,460 INFO L175 Difference]: Start difference. First operand has 377 places, 557 transitions, 8568 flow. Second operand 7 states and 109 transitions. [2024-06-21 17:25:30,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 573 transitions, 9768 flow [2024-06-21 17:25:34,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 573 transitions, 9620 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-21 17:25:34,725 INFO L231 Difference]: Finished difference. Result has 380 places, 557 transitions, 8480 flow [2024-06-21 17:25:34,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8420, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8480, PETRI_PLACES=380, PETRI_TRANSITIONS=557} [2024-06-21 17:25:34,726 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 339 predicate places. [2024-06-21 17:25:34,726 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 557 transitions, 8480 flow [2024-06-21 17:25:34,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:25:34,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:34,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:25:34,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 17:25:34,726 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:25:34,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:34,726 INFO L85 PathProgramCache]: Analyzing trace with hash 2265617, now seen corresponding path program 12 times [2024-06-21 17:25:34,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:34,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108963156] [2024-06-21 17:25:34,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:34,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:34,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:35,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:35,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:35,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108963156] [2024-06-21 17:25:35,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108963156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:35,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:35,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:25:35,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086370746] [2024-06-21 17:25:35,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:35,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:25:35,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:35,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:25:35,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:25:35,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:25:35,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 557 transitions, 8480 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:25:35,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:35,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:25:35,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:37,151 INFO L124 PetriNetUnfolderBase]: 4385/6549 cut-off events. [2024-06-21 17:25:37,151 INFO L125 PetriNetUnfolderBase]: For 1207397/1207397 co-relation queries the response was YES. [2024-06-21 17:25:37,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68346 conditions, 6549 events. 4385/6549 cut-off events. For 1207397/1207397 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 35687 event pairs, 739 based on Foata normal form. 6/6553 useless extension candidates. Maximal degree in co-relation 68169. Up to 6254 conditions per place. [2024-06-21 17:25:37,265 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 510 selfloop transitions, 80 changer transitions 0/593 dead transitions. [2024-06-21 17:25:37,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 593 transitions, 10186 flow [2024-06-21 17:25:37,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:25:37,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:25:37,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 17:25:37,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-21 17:25:37,266 INFO L175 Difference]: Start difference. First operand has 380 places, 557 transitions, 8480 flow. Second operand 7 states and 128 transitions. [2024-06-21 17:25:37,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 593 transitions, 10186 flow [2024-06-21 17:25:41,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 593 transitions, 10074 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 17:25:41,243 INFO L231 Difference]: Finished difference. Result has 383 places, 564 transitions, 8794 flow [2024-06-21 17:25:41,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8368, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8794, PETRI_PLACES=383, PETRI_TRANSITIONS=564} [2024-06-21 17:25:41,244 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 342 predicate places. [2024-06-21 17:25:41,244 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 564 transitions, 8794 flow [2024-06-21 17:25:41,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-21 17:25:41,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:41,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:25:41,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 17:25:41,245 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:25:41,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:41,245 INFO L85 PathProgramCache]: Analyzing trace with hash 14130557, now seen corresponding path program 2 times [2024-06-21 17:25:41,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:41,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284558407] [2024-06-21 17:25:41,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:41,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:41,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:42,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:42,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:42,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284558407] [2024-06-21 17:25:42,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284558407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:42,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:42,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:25:42,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073964169] [2024-06-21 17:25:42,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:42,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:25:42,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:42,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:25:42,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:25:42,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:25:42,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 564 transitions, 8794 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:25:42,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:42,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:25:42,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:43,777 INFO L124 PetriNetUnfolderBase]: 4393/6561 cut-off events. [2024-06-21 17:25:43,777 INFO L125 PetriNetUnfolderBase]: For 1221083/1221083 co-relation queries the response was YES. [2024-06-21 17:25:43,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69231 conditions, 6561 events. 4393/6561 cut-off events. For 1221083/1221083 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 35819 event pairs, 807 based on Foata normal form. 2/6561 useless extension candidates. Maximal degree in co-relation 69052. Up to 6498 conditions per place. [2024-06-21 17:25:43,891 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 551 selfloop transitions, 27 changer transitions 0/581 dead transitions. [2024-06-21 17:25:43,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 581 transitions, 10066 flow [2024-06-21 17:25:43,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:25:43,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:25:43,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-21 17:25:43,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-21 17:25:43,892 INFO L175 Difference]: Start difference. First operand has 383 places, 564 transitions, 8794 flow. Second operand 6 states and 99 transitions. [2024-06-21 17:25:43,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 581 transitions, 10066 flow [2024-06-21 17:25:47,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 581 transitions, 9905 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-21 17:25:47,327 INFO L231 Difference]: Finished difference. Result has 384 places, 566 transitions, 8762 flow [2024-06-21 17:25:47,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8633, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8762, PETRI_PLACES=384, PETRI_TRANSITIONS=566} [2024-06-21 17:25:47,328 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 343 predicate places. [2024-06-21 17:25:47,328 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 566 transitions, 8762 flow [2024-06-21 17:25:47,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:25:47,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:47,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:25:47,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 17:25:47,328 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:25:47,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:47,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1912283071, now seen corresponding path program 3 times [2024-06-21 17:25:47,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:47,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132692122] [2024-06-21 17:25:47,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:47,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:47,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:48,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:48,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:48,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132692122] [2024-06-21 17:25:48,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132692122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:48,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:48,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:25:48,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121413301] [2024-06-21 17:25:48,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:48,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:25:48,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:48,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:25:48,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:25:48,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:25:48,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 566 transitions, 8762 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:25:48,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:48,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:25:48,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:49,842 INFO L124 PetriNetUnfolderBase]: 4401/6573 cut-off events. [2024-06-21 17:25:49,842 INFO L125 PetriNetUnfolderBase]: For 1220142/1220142 co-relation queries the response was YES. [2024-06-21 17:25:49,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69226 conditions, 6573 events. 4401/6573 cut-off events. For 1220142/1220142 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 35879 event pairs, 798 based on Foata normal form. 2/6573 useless extension candidates. Maximal degree in co-relation 69047. Up to 6496 conditions per place. [2024-06-21 17:25:49,949 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 551 selfloop transitions, 31 changer transitions 0/585 dead transitions. [2024-06-21 17:25:49,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 585 transitions, 10050 flow [2024-06-21 17:25:49,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:25:49,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:25:49,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-21 17:25:49,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3964285714285714 [2024-06-21 17:25:49,950 INFO L175 Difference]: Start difference. First operand has 384 places, 566 transitions, 8762 flow. Second operand 7 states and 111 transitions. [2024-06-21 17:25:49,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 585 transitions, 10050 flow [2024-06-21 17:25:53,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 585 transitions, 9937 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-21 17:25:53,762 INFO L231 Difference]: Finished difference. Result has 387 places, 568 transitions, 8790 flow [2024-06-21 17:25:53,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8649, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8790, PETRI_PLACES=387, PETRI_TRANSITIONS=568} [2024-06-21 17:25:53,762 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 346 predicate places. [2024-06-21 17:25:53,762 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 568 transitions, 8790 flow [2024-06-21 17:25:53,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:25:53,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:53,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:25:53,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 17:25:53,763 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:25:53,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:53,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1924688527, now seen corresponding path program 4 times [2024-06-21 17:25:53,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:53,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74196147] [2024-06-21 17:25:53,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:53,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:53,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:54,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:54,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:54,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74196147] [2024-06-21 17:25:54,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74196147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:54,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:54,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:25:54,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693926004] [2024-06-21 17:25:54,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:54,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:25:54,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:54,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:25:54,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:25:54,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:25:54,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 568 transitions, 8790 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:25:54,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:54,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:25:54,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:56,396 INFO L124 PetriNetUnfolderBase]: 4440/6634 cut-off events. [2024-06-21 17:25:56,397 INFO L125 PetriNetUnfolderBase]: For 1296936/1296936 co-relation queries the response was YES. [2024-06-21 17:25:56,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69817 conditions, 6634 events. 4440/6634 cut-off events. For 1296936/1296936 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 36187 event pairs, 685 based on Foata normal form. 14/6646 useless extension candidates. Maximal degree in co-relation 69637. Up to 6404 conditions per place. [2024-06-21 17:25:56,523 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 548 selfloop transitions, 50 changer transitions 0/601 dead transitions. [2024-06-21 17:25:56,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 601 transitions, 10186 flow [2024-06-21 17:25:56,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:25:56,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:25:56,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 17:25:56,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607142857142857 [2024-06-21 17:25:56,524 INFO L175 Difference]: Start difference. First operand has 387 places, 568 transitions, 8790 flow. Second operand 7 states and 129 transitions. [2024-06-21 17:25:56,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 601 transitions, 10186 flow [2024-06-21 17:26:00,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 601 transitions, 10051 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-21 17:26:00,262 INFO L231 Difference]: Finished difference. Result has 389 places, 569 transitions, 8800 flow [2024-06-21 17:26:00,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8655, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8800, PETRI_PLACES=389, PETRI_TRANSITIONS=569} [2024-06-21 17:26:00,263 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 348 predicate places. [2024-06-21 17:26:00,263 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 569 transitions, 8800 flow [2024-06-21 17:26:00,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:26:00,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:00,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:00,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 17:26:00,263 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:00,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:00,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1924319131, now seen corresponding path program 4 times [2024-06-21 17:26:00,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:00,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218725254] [2024-06-21 17:26:00,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:00,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:00,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:01,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:01,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:01,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218725254] [2024-06-21 17:26:01,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218725254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:01,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:01,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:26:01,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922262619] [2024-06-21 17:26:01,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:01,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:26:01,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:01,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:26:01,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:26:01,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:26:01,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 569 transitions, 8800 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:26:01,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:01,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:26:01,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:02,882 INFO L124 PetriNetUnfolderBase]: 4435/6627 cut-off events. [2024-06-21 17:26:02,883 INFO L125 PetriNetUnfolderBase]: For 1241963/1241963 co-relation queries the response was YES. [2024-06-21 17:26:02,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69790 conditions, 6627 events. 4435/6627 cut-off events. For 1241963/1241963 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 36273 event pairs, 818 based on Foata normal form. 2/6627 useless extension candidates. Maximal degree in co-relation 69609. Up to 6558 conditions per place. [2024-06-21 17:26:02,992 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 552 selfloop transitions, 32 changer transitions 0/587 dead transitions. [2024-06-21 17:26:02,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 587 transitions, 10096 flow [2024-06-21 17:26:02,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:26:02,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:26:02,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-21 17:26:02,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3964285714285714 [2024-06-21 17:26:02,993 INFO L175 Difference]: Start difference. First operand has 389 places, 569 transitions, 8800 flow. Second operand 7 states and 111 transitions. [2024-06-21 17:26:02,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 587 transitions, 10096 flow [2024-06-21 17:26:06,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 587 transitions, 9983 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 17:26:06,925 INFO L231 Difference]: Finished difference. Result has 391 places, 571 transitions, 8836 flow [2024-06-21 17:26:06,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8689, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8836, PETRI_PLACES=391, PETRI_TRANSITIONS=571} [2024-06-21 17:26:06,926 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 350 predicate places. [2024-06-21 17:26:06,926 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 571 transitions, 8836 flow [2024-06-21 17:26:06,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:26:06,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:06,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:06,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 17:26:06,926 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:06,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:06,927 INFO L85 PathProgramCache]: Analyzing trace with hash 564617009, now seen corresponding path program 1 times [2024-06-21 17:26:06,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:06,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380637889] [2024-06-21 17:26:06,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:06,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:06,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:07,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:07,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:07,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380637889] [2024-06-21 17:26:07,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380637889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:07,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:07,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:26:07,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270259973] [2024-06-21 17:26:07,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:07,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:26:07,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:07,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:26:07,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:26:07,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:26:07,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 571 transitions, 8836 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:26:07,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:07,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:26:07,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:09,356 INFO L124 PetriNetUnfolderBase]: 4464/6672 cut-off events. [2024-06-21 17:26:09,356 INFO L125 PetriNetUnfolderBase]: For 1273104/1273131 co-relation queries the response was YES. [2024-06-21 17:26:09,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70303 conditions, 6672 events. 4464/6672 cut-off events. For 1273104/1273131 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 36714 event pairs, 718 based on Foata normal form. 22/6688 useless extension candidates. Maximal degree in co-relation 70121. Up to 6353 conditions per place. [2024-06-21 17:26:09,471 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 500 selfloop transitions, 102 changer transitions 0/605 dead transitions. [2024-06-21 17:26:09,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 605 transitions, 10720 flow [2024-06-21 17:26:09,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:26:09,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:26:09,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-21 17:26:09,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40555555555555556 [2024-06-21 17:26:09,472 INFO L175 Difference]: Start difference. First operand has 391 places, 571 transitions, 8836 flow. Second operand 9 states and 146 transitions. [2024-06-21 17:26:09,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 605 transitions, 10720 flow [2024-06-21 17:26:13,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 605 transitions, 10587 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-21 17:26:13,918 INFO L231 Difference]: Finished difference. Result has 395 places, 577 transitions, 9099 flow [2024-06-21 17:26:13,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8703, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9099, PETRI_PLACES=395, PETRI_TRANSITIONS=577} [2024-06-21 17:26:13,918 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 354 predicate places. [2024-06-21 17:26:13,918 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 577 transitions, 9099 flow [2024-06-21 17:26:13,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:26:13,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:13,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:13,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 17:26:13,919 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:13,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:13,919 INFO L85 PathProgramCache]: Analyzing trace with hash 700633511, now seen corresponding path program 1 times [2024-06-21 17:26:13,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:13,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132739168] [2024-06-21 17:26:13,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:13,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:13,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:14,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:14,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:14,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132739168] [2024-06-21 17:26:14,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132739168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:14,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:14,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:26:14,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689036466] [2024-06-21 17:26:14,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:14,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:26:14,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:14,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:26:14,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:26:14,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:26:14,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 577 transitions, 9099 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:26:14,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:14,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:26:14,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:16,424 INFO L124 PetriNetUnfolderBase]: 4500/6722 cut-off events. [2024-06-21 17:26:16,424 INFO L125 PetriNetUnfolderBase]: For 1306060/1306087 co-relation queries the response was YES. [2024-06-21 17:26:16,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71644 conditions, 6722 events. 4500/6722 cut-off events. For 1306060/1306087 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 36959 event pairs, 749 based on Foata normal form. 22/6738 useless extension candidates. Maximal degree in co-relation 71461. Up to 6033 conditions per place. [2024-06-21 17:26:16,540 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 421 selfloop transitions, 192 changer transitions 0/616 dead transitions. [2024-06-21 17:26:16,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 616 transitions, 11323 flow [2024-06-21 17:26:16,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:26:16,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:26:16,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-21 17:26:16,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 17:26:16,541 INFO L175 Difference]: Start difference. First operand has 395 places, 577 transitions, 9099 flow. Second operand 11 states and 176 transitions. [2024-06-21 17:26:16,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 616 transitions, 11323 flow [2024-06-21 17:26:20,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 616 transitions, 11074 flow, removed 63 selfloop flow, removed 5 redundant places. [2024-06-21 17:26:20,505 INFO L231 Difference]: Finished difference. Result has 401 places, 585 transitions, 9498 flow [2024-06-21 17:26:20,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8850, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9498, PETRI_PLACES=401, PETRI_TRANSITIONS=585} [2024-06-21 17:26:20,505 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 360 predicate places. [2024-06-21 17:26:20,505 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 585 transitions, 9498 flow [2024-06-21 17:26:20,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:26:20,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:20,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:20,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 17:26:20,505 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:20,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:20,506 INFO L85 PathProgramCache]: Analyzing trace with hash 700633387, now seen corresponding path program 2 times [2024-06-21 17:26:20,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:20,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459187710] [2024-06-21 17:26:20,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:20,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:20,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:21,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:21,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:21,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459187710] [2024-06-21 17:26:21,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459187710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:21,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:21,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:26:21,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710570277] [2024-06-21 17:26:21,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:21,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:26:21,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:21,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:26:21,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:26:21,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:26:21,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 585 transitions, 9498 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:26:21,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:21,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:26:21,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:23,047 INFO L124 PetriNetUnfolderBase]: 4516/6746 cut-off events. [2024-06-21 17:26:23,047 INFO L125 PetriNetUnfolderBase]: For 1338732/1338759 co-relation queries the response was YES. [2024-06-21 17:26:23,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72735 conditions, 6746 events. 4516/6746 cut-off events. For 1338732/1338759 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 37166 event pairs, 812 based on Foata normal form. 22/6762 useless extension candidates. Maximal degree in co-relation 72550. Up to 6496 conditions per place. [2024-06-21 17:26:23,346 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 511 selfloop transitions, 98 changer transitions 0/612 dead transitions. [2024-06-21 17:26:23,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 612 transitions, 11056 flow [2024-06-21 17:26:23,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:26:23,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:26:23,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-06-21 17:26:23,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3825 [2024-06-21 17:26:23,347 INFO L175 Difference]: Start difference. First operand has 401 places, 585 transitions, 9498 flow. Second operand 10 states and 153 transitions. [2024-06-21 17:26:23,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 612 transitions, 11056 flow [2024-06-21 17:26:26,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 612 transitions, 10694 flow, removed 73 selfloop flow, removed 7 redundant places. [2024-06-21 17:26:26,581 INFO L231 Difference]: Finished difference. Result has 404 places, 588 transitions, 9398 flow [2024-06-21 17:26:26,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9136, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9398, PETRI_PLACES=404, PETRI_TRANSITIONS=588} [2024-06-21 17:26:26,581 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 363 predicate places. [2024-06-21 17:26:26,581 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 588 transitions, 9398 flow [2024-06-21 17:26:26,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:26:26,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:26,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:26,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 17:26:26,582 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:26,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:26,582 INFO L85 PathProgramCache]: Analyzing trace with hash 818721067, now seen corresponding path program 3 times [2024-06-21 17:26:26,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:26,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065372350] [2024-06-21 17:26:26,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:26,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:26,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:27,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:27,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:27,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065372350] [2024-06-21 17:26:27,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065372350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:27,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:27,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:26:27,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307658033] [2024-06-21 17:26:27,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:27,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:26:27,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:27,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:26:27,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:26:27,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:26:27,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 588 transitions, 9398 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:26:27,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:27,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:26:27,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:29,386 INFO L124 PetriNetUnfolderBase]: 4620/6905 cut-off events. [2024-06-21 17:26:29,386 INFO L125 PetriNetUnfolderBase]: For 1494451/1494451 co-relation queries the response was YES. [2024-06-21 17:26:29,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74537 conditions, 6905 events. 4620/6905 cut-off events. For 1494451/1494451 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 38186 event pairs, 763 based on Foata normal form. 28/6931 useless extension candidates. Maximal degree in co-relation 74350. Up to 6666 conditions per place. [2024-06-21 17:26:29,495 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 563 selfloop transitions, 54 changer transitions 0/620 dead transitions. [2024-06-21 17:26:29,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 620 transitions, 10974 flow [2024-06-21 17:26:29,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:26:29,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:26:29,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-21 17:26:29,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39 [2024-06-21 17:26:29,496 INFO L175 Difference]: Start difference. First operand has 404 places, 588 transitions, 9398 flow. Second operand 10 states and 156 transitions. [2024-06-21 17:26:29,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 620 transitions, 10974 flow [2024-06-21 17:26:34,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 620 transitions, 10707 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-21 17:26:34,157 INFO L231 Difference]: Finished difference. Result has 405 places, 593 transitions, 9404 flow [2024-06-21 17:26:34,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9131, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9404, PETRI_PLACES=405, PETRI_TRANSITIONS=593} [2024-06-21 17:26:34,157 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 364 predicate places. [2024-06-21 17:26:34,157 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 593 transitions, 9404 flow [2024-06-21 17:26:34,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:26:34,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:34,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:34,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 17:26:34,158 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:34,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:34,158 INFO L85 PathProgramCache]: Analyzing trace with hash 682769913, now seen corresponding path program 2 times [2024-06-21 17:26:34,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:34,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326130839] [2024-06-21 17:26:34,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:34,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:34,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:34,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:34,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:34,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326130839] [2024-06-21 17:26:34,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326130839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:34,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:34,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:26:34,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130525221] [2024-06-21 17:26:34,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:34,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:26:34,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:34,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:26:34,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:26:34,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:26:34,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 593 transitions, 9404 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:26:34,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:34,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:26:34,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:36,845 INFO L124 PetriNetUnfolderBase]: 4640/6933 cut-off events. [2024-06-21 17:26:36,845 INFO L125 PetriNetUnfolderBase]: For 1393704/1393704 co-relation queries the response was YES. [2024-06-21 17:26:36,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75056 conditions, 6933 events. 4640/6933 cut-off events. For 1393704/1393704 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 38387 event pairs, 735 based on Foata normal form. 4/6935 useless extension candidates. Maximal degree in co-relation 74868. Up to 6770 conditions per place. [2024-06-21 17:26:36,958 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 560 selfloop transitions, 58 changer transitions 0/621 dead transitions. [2024-06-21 17:26:36,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 621 transitions, 11280 flow [2024-06-21 17:26:36,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:26:36,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:26:36,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-06-21 17:26:36,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3825 [2024-06-21 17:26:36,959 INFO L175 Difference]: Start difference. First operand has 405 places, 593 transitions, 9404 flow. Second operand 10 states and 153 transitions. [2024-06-21 17:26:36,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 621 transitions, 11280 flow [2024-06-21 17:26:41,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 621 transitions, 11117 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-21 17:26:41,222 INFO L231 Difference]: Finished difference. Result has 407 places, 597 transitions, 9474 flow [2024-06-21 17:26:41,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9241, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9474, PETRI_PLACES=407, PETRI_TRANSITIONS=597} [2024-06-21 17:26:41,222 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 366 predicate places. [2024-06-21 17:26:41,222 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 597 transitions, 9474 flow [2024-06-21 17:26:41,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:26:41,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:41,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:41,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 17:26:41,222 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:41,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:41,223 INFO L85 PathProgramCache]: Analyzing trace with hash 818721191, now seen corresponding path program 3 times [2024-06-21 17:26:41,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:41,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545460528] [2024-06-21 17:26:41,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:41,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:41,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:41,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:41,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:41,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545460528] [2024-06-21 17:26:41,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545460528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:41,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:41,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:26:41,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310149015] [2024-06-21 17:26:41,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:41,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:26:41,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:41,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:26:41,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:26:42,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:26:42,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 597 transitions, 9474 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:26:42,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:42,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:26:42,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:44,019 INFO L124 PetriNetUnfolderBase]: 4676/6983 cut-off events. [2024-06-21 17:26:44,019 INFO L125 PetriNetUnfolderBase]: For 1421955/1421955 co-relation queries the response was YES. [2024-06-21 17:26:44,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75624 conditions, 6983 events. 4676/6983 cut-off events. For 1421955/1421955 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 38645 event pairs, 755 based on Foata normal form. 4/6985 useless extension candidates. Maximal degree in co-relation 75435. Up to 6773 conditions per place. [2024-06-21 17:26:44,137 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 555 selfloop transitions, 73 changer transitions 0/631 dead transitions. [2024-06-21 17:26:44,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 631 transitions, 11688 flow [2024-06-21 17:26:44,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:26:44,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:26:44,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 168 transitions. [2024-06-21 17:26:44,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2024-06-21 17:26:44,138 INFO L175 Difference]: Start difference. First operand has 407 places, 597 transitions, 9474 flow. Second operand 11 states and 168 transitions. [2024-06-21 17:26:44,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 631 transitions, 11688 flow [2024-06-21 17:26:48,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 631 transitions, 11491 flow, removed 43 selfloop flow, removed 8 redundant places. [2024-06-21 17:26:48,915 INFO L231 Difference]: Finished difference. Result has 410 places, 604 transitions, 9631 flow [2024-06-21 17:26:48,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9277, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9631, PETRI_PLACES=410, PETRI_TRANSITIONS=604} [2024-06-21 17:26:48,915 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 369 predicate places. [2024-06-21 17:26:48,915 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 604 transitions, 9631 flow [2024-06-21 17:26:48,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:26:48,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:48,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:48,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 17:26:48,916 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:48,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:48,916 INFO L85 PathProgramCache]: Analyzing trace with hash 818905765, now seen corresponding path program 1 times [2024-06-21 17:26:48,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:48,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635229708] [2024-06-21 17:26:48,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:48,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:48,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:49,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:49,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:49,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635229708] [2024-06-21 17:26:49,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635229708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:49,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:49,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:26:49,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779006680] [2024-06-21 17:26:49,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:49,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:26:49,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:49,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:26:49,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:26:49,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:26:49,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 604 transitions, 9631 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:26:49,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:49,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:26:49,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:51,659 INFO L124 PetriNetUnfolderBase]: 4684/6995 cut-off events. [2024-06-21 17:26:51,659 INFO L125 PetriNetUnfolderBase]: For 1434512/1434512 co-relation queries the response was YES. [2024-06-21 17:26:51,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75954 conditions, 6995 events. 4684/6995 cut-off events. For 1434512/1434512 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 38766 event pairs, 761 based on Foata normal form. 2/6995 useless extension candidates. Maximal degree in co-relation 75764. Up to 6932 conditions per place. [2024-06-21 17:26:51,785 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 592 selfloop transitions, 28 changer transitions 0/623 dead transitions. [2024-06-21 17:26:51,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 623 transitions, 11009 flow [2024-06-21 17:26:51,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:26:51,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:26:51,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-21 17:26:51,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36875 [2024-06-21 17:26:51,786 INFO L175 Difference]: Start difference. First operand has 410 places, 604 transitions, 9631 flow. Second operand 8 states and 118 transitions. [2024-06-21 17:26:51,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 623 transitions, 11009 flow [2024-06-21 17:26:56,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 623 transitions, 10845 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-21 17:26:56,411 INFO L231 Difference]: Finished difference. Result has 411 places, 606 transitions, 9602 flow [2024-06-21 17:26:56,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9467, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9602, PETRI_PLACES=411, PETRI_TRANSITIONS=606} [2024-06-21 17:26:56,411 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 370 predicate places. [2024-06-21 17:26:56,411 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 606 transitions, 9602 flow [2024-06-21 17:26:56,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:26:56,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:56,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:56,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 17:26:56,411 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:56,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:56,412 INFO L85 PathProgramCache]: Analyzing trace with hash 416003211, now seen corresponding path program 1 times [2024-06-21 17:26:56,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:56,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737585106] [2024-06-21 17:26:56,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:56,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:57,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:57,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:57,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737585106] [2024-06-21 17:26:57,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737585106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:57,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:57,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:26:57,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420784054] [2024-06-21 17:26:57,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:57,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:26:57,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:57,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:26:57,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:26:57,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:26:57,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 606 transitions, 9602 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:26:57,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:57,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:26:57,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:59,031 INFO L124 PetriNetUnfolderBase]: 4680/6989 cut-off events. [2024-06-21 17:26:59,031 INFO L125 PetriNetUnfolderBase]: For 1453329/1453329 co-relation queries the response was YES. [2024-06-21 17:26:59,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75843 conditions, 6989 events. 4680/6989 cut-off events. For 1453329/1453329 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 38753 event pairs, 829 based on Foata normal form. 2/6989 useless extension candidates. Maximal degree in co-relation 75651. Up to 6766 conditions per place. [2024-06-21 17:26:59,148 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 556 selfloop transitions, 80 changer transitions 0/639 dead transitions. [2024-06-21 17:26:59,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 639 transitions, 11487 flow [2024-06-21 17:26:59,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:26:59,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:26:59,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 17:26:59,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 17:26:59,149 INFO L175 Difference]: Start difference. First operand has 411 places, 606 transitions, 9602 flow. Second operand 7 states and 126 transitions. [2024-06-21 17:26:59,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 639 transitions, 11487 flow [2024-06-21 17:27:04,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 639 transitions, 11328 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 17:27:04,405 INFO L231 Difference]: Finished difference. Result has 413 places, 615 transitions, 10001 flow [2024-06-21 17:27:04,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9443, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10001, PETRI_PLACES=413, PETRI_TRANSITIONS=615} [2024-06-21 17:27:04,406 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 372 predicate places. [2024-06-21 17:27:04,406 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 615 transitions, 10001 flow [2024-06-21 17:27:04,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:27:04,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:27:04,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:27:04,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 17:27:04,406 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:27:04,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:27:04,407 INFO L85 PathProgramCache]: Analyzing trace with hash 407729249, now seen corresponding path program 2 times [2024-06-21 17:27:04,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:27:04,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156100607] [2024-06-21 17:27:04,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:27:04,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:27:04,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:27:05,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:27:05,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:27:05,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156100607] [2024-06-21 17:27:05,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156100607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:27:05,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:27:05,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:27:05,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926670547] [2024-06-21 17:27:05,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:27:05,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:27:05,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:27:05,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:27:05,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:27:05,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:27:05,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 615 transitions, 10001 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:27:05,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:27:05,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:27:05,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:27:06,914 INFO L124 PetriNetUnfolderBase]: 4688/7002 cut-off events. [2024-06-21 17:27:06,914 INFO L125 PetriNetUnfolderBase]: For 1480082/1480082 co-relation queries the response was YES. [2024-06-21 17:27:07,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76647 conditions, 7002 events. 4688/7002 cut-off events. For 1480082/1480082 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 38792 event pairs, 744 based on Foata normal form. 2/7002 useless extension candidates. Maximal degree in co-relation 76454. Up to 6931 conditions per place. [2024-06-21 17:27:07,036 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 600 selfloop transitions, 28 changer transitions 0/631 dead transitions. [2024-06-21 17:27:07,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 631 transitions, 11385 flow [2024-06-21 17:27:07,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:27:07,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:27:07,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-21 17:27:07,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 17:27:07,037 INFO L175 Difference]: Start difference. First operand has 413 places, 615 transitions, 10001 flow. Second operand 6 states and 95 transitions. [2024-06-21 17:27:07,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 631 transitions, 11385 flow [2024-06-21 17:27:12,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 631 transitions, 11245 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-06-21 17:27:12,765 INFO L231 Difference]: Finished difference. Result has 416 places, 617 transitions, 10004 flow [2024-06-21 17:27:12,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9861, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10004, PETRI_PLACES=416, PETRI_TRANSITIONS=617} [2024-06-21 17:27:12,766 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 375 predicate places. [2024-06-21 17:27:12,766 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 617 transitions, 10004 flow [2024-06-21 17:27:12,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:27:12,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:27:12,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:27:12,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 17:27:12,767 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:27:12,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:27:12,767 INFO L85 PathProgramCache]: Analyzing trace with hash 416300129, now seen corresponding path program 3 times [2024-06-21 17:27:12,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:27:12,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327572401] [2024-06-21 17:27:12,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:27:12,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:27:12,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:27:13,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:27:13,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:27:13,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327572401] [2024-06-21 17:27:13,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327572401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:27:13,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:27:13,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:27:13,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742993060] [2024-06-21 17:27:13,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:27:13,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:27:13,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:27:13,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:27:13,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:27:13,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:27:13,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 617 transitions, 10004 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:27:13,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:27:13,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:27:13,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:27:15,428 INFO L124 PetriNetUnfolderBase]: 4696/7027 cut-off events. [2024-06-21 17:27:15,428 INFO L125 PetriNetUnfolderBase]: For 1514804/1514804 co-relation queries the response was YES. [2024-06-21 17:27:15,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77058 conditions, 7027 events. 4696/7027 cut-off events. For 1514804/1514804 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 39144 event pairs, 1488 based on Foata normal form. 2/7027 useless extension candidates. Maximal degree in co-relation 76863. Up to 6973 conditions per place. [2024-06-21 17:27:15,552 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 611 selfloop transitions, 19 changer transitions 0/633 dead transitions. [2024-06-21 17:27:15,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 633 transitions, 11410 flow [2024-06-21 17:27:15,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:27:15,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:27:15,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 118 transitions. [2024-06-21 17:27:15,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3277777777777778 [2024-06-21 17:27:15,553 INFO L175 Difference]: Start difference. First operand has 416 places, 617 transitions, 10004 flow. Second operand 9 states and 118 transitions. [2024-06-21 17:27:15,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 633 transitions, 11410 flow [2024-06-21 17:27:20,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 633 transitions, 11283 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-21 17:27:20,466 INFO L231 Difference]: Finished difference. Result has 422 places, 621 transitions, 10043 flow [2024-06-21 17:27:20,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9883, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10043, PETRI_PLACES=422, PETRI_TRANSITIONS=621} [2024-06-21 17:27:20,467 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 381 predicate places. [2024-06-21 17:27:20,467 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 621 transitions, 10043 flow [2024-06-21 17:27:20,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:27:20,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:27:20,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:27:20,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 17:27:20,467 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:27:20,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:27:20,468 INFO L85 PathProgramCache]: Analyzing trace with hash -520219995, now seen corresponding path program 4 times [2024-06-21 17:27:20,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:27:20,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464847292] [2024-06-21 17:27:20,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:27:20,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:27:20,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:27:21,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:27:21,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:27:21,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464847292] [2024-06-21 17:27:21,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464847292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:27:21,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:27:21,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:27:21,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038588722] [2024-06-21 17:27:21,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:27:21,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:27:21,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:27:21,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:27:21,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:27:21,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:27:21,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 621 transitions, 10043 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:27:21,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:27:21,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:27:21,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:27:23,186 INFO L124 PetriNetUnfolderBase]: 4691/7020 cut-off events. [2024-06-21 17:27:23,186 INFO L125 PetriNetUnfolderBase]: For 1503311/1503311 co-relation queries the response was YES. [2024-06-21 17:27:23,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76591 conditions, 7020 events. 4691/7020 cut-off events. For 1503311/1503311 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 39174 event pairs, 1398 based on Foata normal form. 2/7020 useless extension candidates. Maximal degree in co-relation 76394. Up to 6924 conditions per place. [2024-06-21 17:27:23,319 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 597 selfloop transitions, 36 changer transitions 0/636 dead transitions. [2024-06-21 17:27:23,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 636 transitions, 11435 flow [2024-06-21 17:27:23,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:27:23,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:27:23,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-21 17:27:23,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 17:27:23,320 INFO L175 Difference]: Start difference. First operand has 422 places, 621 transitions, 10043 flow. Second operand 6 states and 96 transitions. [2024-06-21 17:27:23,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 636 transitions, 11435 flow [2024-06-21 17:27:28,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 636 transitions, 11292 flow, removed 45 selfloop flow, removed 8 redundant places. [2024-06-21 17:27:28,892 INFO L231 Difference]: Finished difference. Result has 420 places, 623 transitions, 10066 flow [2024-06-21 17:27:28,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9900, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10066, PETRI_PLACES=420, PETRI_TRANSITIONS=623} [2024-06-21 17:27:28,892 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 379 predicate places. [2024-06-21 17:27:28,893 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 623 transitions, 10066 flow [2024-06-21 17:27:28,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:27:28,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:27:28,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:27:28,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 17:27:28,893 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:27:28,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:27:28,893 INFO L85 PathProgramCache]: Analyzing trace with hash 179648175, now seen corresponding path program 4 times [2024-06-21 17:27:28,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:27:28,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262928792] [2024-06-21 17:27:28,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:27:28,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:27:28,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:27:29,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:27:29,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:27:29,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262928792] [2024-06-21 17:27:29,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262928792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:27:29,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:27:29,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:27:29,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508624293] [2024-06-21 17:27:29,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:27:29,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:27:29,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:27:29,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:27:29,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:27:29,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:27:29,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 623 transitions, 10066 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:27:29,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:27:29,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:27:29,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:27:31,781 INFO L124 PetriNetUnfolderBase]: 4711/7046 cut-off events. [2024-06-21 17:27:31,782 INFO L125 PetriNetUnfolderBase]: For 1542080/1542084 co-relation queries the response was YES. [2024-06-21 17:27:31,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77147 conditions, 7046 events. 4711/7046 cut-off events. For 1542080/1542084 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 39343 event pairs, 1183 based on Foata normal form. 8/7052 useless extension candidates. Maximal degree in co-relation 76953. Up to 6721 conditions per place. [2024-06-21 17:27:31,894 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 555 selfloop transitions, 97 changer transitions 0/655 dead transitions. [2024-06-21 17:27:31,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 655 transitions, 12052 flow [2024-06-21 17:27:31,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:27:31,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:27:31,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 17:27:31,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-21 17:27:31,895 INFO L175 Difference]: Start difference. First operand has 420 places, 623 transitions, 10066 flow. Second operand 9 states and 151 transitions. [2024-06-21 17:27:31,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 655 transitions, 12052 flow [2024-06-21 17:27:36,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 655 transitions, 11910 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-21 17:27:36,621 INFO L231 Difference]: Finished difference. Result has 425 places, 627 transitions, 10255 flow [2024-06-21 17:27:36,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9928, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10255, PETRI_PLACES=425, PETRI_TRANSITIONS=627} [2024-06-21 17:27:36,621 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 384 predicate places. [2024-06-21 17:27:36,621 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 627 transitions, 10255 flow [2024-06-21 17:27:36,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:27:36,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:27:36,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:27:36,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 17:27:36,622 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:27:36,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:27:36,622 INFO L85 PathProgramCache]: Analyzing trace with hash 179643401, now seen corresponding path program 4 times [2024-06-21 17:27:36,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:27:36,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503440196] [2024-06-21 17:27:36,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:27:36,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:27:36,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:27:37,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:27:37,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:27:37,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503440196] [2024-06-21 17:27:37,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503440196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:27:37,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:27:37,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:27:37,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762797731] [2024-06-21 17:27:37,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:27:37,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:27:37,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:27:37,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:27:37,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:27:37,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:27:37,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 627 transitions, 10255 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:27:37,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:27:37,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:27:37,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:27:39,510 INFO L124 PetriNetUnfolderBase]: 4802/7187 cut-off events. [2024-06-21 17:27:39,510 INFO L125 PetriNetUnfolderBase]: For 1687710/1687714 co-relation queries the response was YES. [2024-06-21 17:27:39,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78772 conditions, 7187 events. 4802/7187 cut-off events. For 1687710/1687714 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 40218 event pairs, 1122 based on Foata normal form. 32/7217 useless extension candidates. Maximal degree in co-relation 78577. Up to 6793 conditions per place. [2024-06-21 17:27:39,639 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 581 selfloop transitions, 84 changer transitions 0/668 dead transitions. [2024-06-21 17:27:39,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 668 transitions, 11943 flow [2024-06-21 17:27:39,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:27:39,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:27:39,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 17:27:39,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 17:27:39,640 INFO L175 Difference]: Start difference. First operand has 425 places, 627 transitions, 10255 flow. Second operand 9 states and 162 transitions. [2024-06-21 17:27:39,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 668 transitions, 11943 flow [2024-06-21 17:27:44,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 668 transitions, 11652 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-21 17:27:44,380 INFO L231 Difference]: Finished difference. Result has 427 places, 631 transitions, 10287 flow [2024-06-21 17:27:44,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9964, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10287, PETRI_PLACES=427, PETRI_TRANSITIONS=631} [2024-06-21 17:27:44,381 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 386 predicate places. [2024-06-21 17:27:44,381 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 631 transitions, 10287 flow [2024-06-21 17:27:44,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:27:44,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:27:44,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:27:44,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 17:27:44,382 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:27:44,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:27:44,382 INFO L85 PathProgramCache]: Analyzing trace with hash 179643525, now seen corresponding path program 5 times [2024-06-21 17:27:44,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:27:44,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147236170] [2024-06-21 17:27:44,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:27:44,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:27:44,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:27:45,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:27:45,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:27:45,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147236170] [2024-06-21 17:27:45,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147236170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:27:45,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:27:45,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:27:45,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756893857] [2024-06-21 17:27:45,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:27:45,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:27:45,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:27:45,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:27:45,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:27:45,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:27:45,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 631 transitions, 10287 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:27:45,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:27:45,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:27:45,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:27:47,218 INFO L124 PetriNetUnfolderBase]: 4838/7237 cut-off events. [2024-06-21 17:27:47,218 INFO L125 PetriNetUnfolderBase]: For 1576575/1576579 co-relation queries the response was YES. [2024-06-21 17:27:47,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79813 conditions, 7237 events. 4838/7237 cut-off events. For 1576575/1576579 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 40530 event pairs, 1162 based on Foata normal form. 8/7243 useless extension candidates. Maximal degree in co-relation 79617. Up to 6832 conditions per place. [2024-06-21 17:27:47,345 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 552 selfloop transitions, 117 changer transitions 0/672 dead transitions. [2024-06-21 17:27:47,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 672 transitions, 12661 flow [2024-06-21 17:27:47,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:27:47,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:27:47,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-21 17:27:47,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 17:27:47,347 INFO L175 Difference]: Start difference. First operand has 427 places, 631 transitions, 10287 flow. Second operand 10 states and 170 transitions. [2024-06-21 17:27:47,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 672 transitions, 12661 flow [2024-06-21 17:27:52,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 672 transitions, 12438 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-21 17:27:52,840 INFO L231 Difference]: Finished difference. Result has 430 places, 638 transitions, 10532 flow [2024-06-21 17:27:52,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10064, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10532, PETRI_PLACES=430, PETRI_TRANSITIONS=638} [2024-06-21 17:27:52,840 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 389 predicate places. [2024-06-21 17:27:52,840 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 638 transitions, 10532 flow [2024-06-21 17:27:52,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:27:52,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:27:52,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:27:52,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 17:27:52,841 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:27:52,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:27:52,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1893407693, now seen corresponding path program 6 times [2024-06-21 17:27:52,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:27:52,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64074639] [2024-06-21 17:27:52,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:27:52,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:27:52,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:27:53,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:27:53,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:27:53,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64074639] [2024-06-21 17:27:53,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64074639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:27:53,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:27:53,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:27:53,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477231578] [2024-06-21 17:27:53,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:27:53,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:27:53,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:27:53,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:27:53,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:27:53,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:27:53,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 638 transitions, 10532 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:27:53,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:27:53,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:27:53,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:27:55,761 INFO L124 PetriNetUnfolderBase]: 4994/7457 cut-off events. [2024-06-21 17:27:55,761 INFO L125 PetriNetUnfolderBase]: For 1707138/1707138 co-relation queries the response was YES. [2024-06-21 17:27:55,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83019 conditions, 7457 events. 4994/7457 cut-off events. For 1707138/1707138 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 41717 event pairs, 1411 based on Foata normal form. 12/7467 useless extension candidates. Maximal degree in co-relation 82822. Up to 7081 conditions per place. [2024-06-21 17:27:55,896 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 608 selfloop transitions, 71 changer transitions 0/682 dead transitions. [2024-06-21 17:27:55,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 682 transitions, 12935 flow [2024-06-21 17:27:55,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:27:55,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:27:55,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-21 17:27:55,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 17:27:55,897 INFO L175 Difference]: Start difference. First operand has 430 places, 638 transitions, 10532 flow. Second operand 9 states and 144 transitions. [2024-06-21 17:27:55,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 682 transitions, 12935 flow [2024-06-21 17:28:02,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 682 transitions, 12686 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-21 17:28:02,718 INFO L231 Difference]: Finished difference. Result has 434 places, 658 transitions, 10963 flow [2024-06-21 17:28:02,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10293, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10963, PETRI_PLACES=434, PETRI_TRANSITIONS=658} [2024-06-21 17:28:02,719 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 393 predicate places. [2024-06-21 17:28:02,719 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 658 transitions, 10963 flow [2024-06-21 17:28:02,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:28:02,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:28:02,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:28:02,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 17:28:02,719 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:28:02,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:28:02,719 INFO L85 PathProgramCache]: Analyzing trace with hash -789372032, now seen corresponding path program 1 times [2024-06-21 17:28:02,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:28:02,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171257623] [2024-06-21 17:28:02,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:28:02,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:28:02,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:28:03,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:28:03,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:28:03,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171257623] [2024-06-21 17:28:03,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171257623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:28:03,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:28:03,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:28:03,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445226761] [2024-06-21 17:28:03,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:28:03,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:28:03,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:28:03,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:28:03,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:28:03,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:28:03,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 658 transitions, 10963 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) [2024-06-21 17:28:03,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:28:03,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:28:03,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:28:05,415 INFO L124 PetriNetUnfolderBase]: 5018/7569 cut-off events. [2024-06-21 17:28:05,415 INFO L125 PetriNetUnfolderBase]: For 1698003/1698065 co-relation queries the response was YES. [2024-06-21 17:28:05,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85010 conditions, 7569 events. 5018/7569 cut-off events. For 1698003/1698065 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 43393 event pairs, 841 based on Foata normal form. 51/7592 useless extension candidates. Maximal degree in co-relation 84810. Up to 6873 conditions per place. [2024-06-21 17:28:05,559 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 551 selfloop transitions, 122 changer transitions 0/770 dead transitions. [2024-06-21 17:28:05,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 770 transitions, 13945 flow [2024-06-21 17:28:05,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:28:05,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:28:05,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 17:28:05,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-21 17:28:05,560 INFO L175 Difference]: Start difference. First operand has 434 places, 658 transitions, 10963 flow. Second operand 9 states and 152 transitions. [2024-06-21 17:28:05,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 770 transitions, 13945 flow [2024-06-21 17:28:12,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 770 transitions, 13670 flow, removed 127 selfloop flow, removed 3 redundant places. [2024-06-21 17:28:12,093 INFO L231 Difference]: Finished difference. Result has 443 places, 736 transitions, 12313 flow [2024-06-21 17:28:12,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10688, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12313, PETRI_PLACES=443, PETRI_TRANSITIONS=736} [2024-06-21 17:28:12,093 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 402 predicate places. [2024-06-21 17:28:12,094 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 736 transitions, 12313 flow [2024-06-21 17:28:12,094 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) [2024-06-21 17:28:12,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:28:12,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:28:12,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 17:28:12,094 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:28:12,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:28:12,094 INFO L85 PathProgramCache]: Analyzing trace with hash 266673054, now seen corresponding path program 2 times [2024-06-21 17:28:12,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:28:12,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699408410] [2024-06-21 17:28:12,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:28:12,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:28:12,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:28:12,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:28:12,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:28:12,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699408410] [2024-06-21 17:28:12,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699408410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:28:12,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:28:12,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:28:12,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817867600] [2024-06-21 17:28:12,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:28:12,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:28:12,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:28:12,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:28:12,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:28:12,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:28:12,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 736 transitions, 12313 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:28:12,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:28:12,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:28:12,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:28:15,639 INFO L124 PetriNetUnfolderBase]: 5385/8022 cut-off events. [2024-06-21 17:28:15,639 INFO L125 PetriNetUnfolderBase]: For 1732114/1732118 co-relation queries the response was YES. [2024-06-21 17:28:15,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89633 conditions, 8022 events. 5385/8022 cut-off events. For 1732114/1732118 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 45241 event pairs, 1236 based on Foata normal form. 5/8025 useless extension candidates. Maximal degree in co-relation 89428. Up to 7758 conditions per place. [2024-06-21 17:28:15,780 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 700 selfloop transitions, 100 changer transitions 0/803 dead transitions. [2024-06-21 17:28:15,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 803 transitions, 14994 flow [2024-06-21 17:28:15,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:28:15,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:28:15,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-21 17:28:15,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41388888888888886 [2024-06-21 17:28:15,781 INFO L175 Difference]: Start difference. First operand has 443 places, 736 transitions, 12313 flow. Second operand 9 states and 149 transitions. [2024-06-21 17:28:15,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 803 transitions, 14994 flow [2024-06-21 17:28:21,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 803 transitions, 14931 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-21 17:28:21,903 INFO L231 Difference]: Finished difference. Result has 452 places, 772 transitions, 13308 flow [2024-06-21 17:28:21,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12274, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=641, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13308, PETRI_PLACES=452, PETRI_TRANSITIONS=772} [2024-06-21 17:28:21,903 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 411 predicate places. [2024-06-21 17:28:21,904 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 772 transitions, 13308 flow [2024-06-21 17:28:21,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:28:21,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:28:21,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:28:21,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 17:28:21,904 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:28:21,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:28:21,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1503053184, now seen corresponding path program 3 times [2024-06-21 17:28:21,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:28:21,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917422394] [2024-06-21 17:28:21,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:28:21,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:28:21,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:28:22,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:28:22,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:28:22,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917422394] [2024-06-21 17:28:22,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917422394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:28:22,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:28:22,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:28:22,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752997514] [2024-06-21 17:28:22,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:28:22,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:28:22,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:28:22,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:28:22,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:28:22,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:28:22,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 772 transitions, 13308 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-21 17:28:22,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:28:22,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:28:22,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:28:25,167 INFO L124 PetriNetUnfolderBase]: 5402/8036 cut-off events. [2024-06-21 17:28:25,167 INFO L125 PetriNetUnfolderBase]: For 1763609/1763615 co-relation queries the response was YES. [2024-06-21 17:28:25,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90907 conditions, 8036 events. 5402/8036 cut-off events. For 1763609/1763615 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 45136 event pairs, 939 based on Foata normal form. 7/8041 useless extension candidates. Maximal degree in co-relation 90698. Up to 7820 conditions per place. [2024-06-21 17:28:25,320 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 710 selfloop transitions, 100 changer transitions 0/813 dead transitions. [2024-06-21 17:28:25,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 813 transitions, 15390 flow [2024-06-21 17:28:25,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:28:25,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:28:25,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-21 17:28:25,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2024-06-21 17:28:25,322 INFO L175 Difference]: Start difference. First operand has 452 places, 772 transitions, 13308 flow. Second operand 9 states and 145 transitions. [2024-06-21 17:28:25,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 813 transitions, 15390 flow [2024-06-21 17:28:31,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 813 transitions, 15208 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-21 17:28:31,810 INFO L231 Difference]: Finished difference. Result has 459 places, 787 transitions, 13750 flow [2024-06-21 17:28:31,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13145, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=772, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=677, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13750, PETRI_PLACES=459, PETRI_TRANSITIONS=787} [2024-06-21 17:28:31,810 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 418 predicate places. [2024-06-21 17:28:31,810 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 787 transitions, 13750 flow [2024-06-21 17:28:31,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-21 17:28:31,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:28:31,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:28:31,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 17:28:31,811 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:28:31,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:28:31,811 INFO L85 PathProgramCache]: Analyzing trace with hash 264975959, now seen corresponding path program 1 times [2024-06-21 17:28:31,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:28:31,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704064850] [2024-06-21 17:28:31,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:28:31,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:28:31,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:28:32,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:28:32,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:28:32,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704064850] [2024-06-21 17:28:32,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704064850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:28:32,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:28:32,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:28:32,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892148419] [2024-06-21 17:28:32,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:28:32,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:28:32,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:28:32,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:28:32,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:28:32,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:28:32,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 787 transitions, 13750 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-21 17:28:32,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:28:32,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:28:32,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:28:35,349 INFO L124 PetriNetUnfolderBase]: 5627/8377 cut-off events. [2024-06-21 17:28:35,349 INFO L125 PetriNetUnfolderBase]: For 1929961/1929965 co-relation queries the response was YES. [2024-06-21 17:28:35,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94810 conditions, 8377 events. 5627/8377 cut-off events. For 1929961/1929965 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 47412 event pairs, 1001 based on Foata normal form. 12/8387 useless extension candidates. Maximal degree in co-relation 94598. Up to 7760 conditions per place. [2024-06-21 17:28:35,503 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 736 selfloop transitions, 122 changer transitions 0/861 dead transitions. [2024-06-21 17:28:35,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 861 transitions, 16280 flow [2024-06-21 17:28:35,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:28:35,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:28:35,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 17:28:35,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361111111111111 [2024-06-21 17:28:35,505 INFO L175 Difference]: Start difference. First operand has 459 places, 787 transitions, 13750 flow. Second operand 9 states and 157 transitions. [2024-06-21 17:28:35,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 861 transitions, 16280 flow [2024-06-21 17:28:42,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 861 transitions, 16095 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 17:28:42,259 INFO L231 Difference]: Finished difference. Result has 465 places, 812 transitions, 14078 flow [2024-06-21 17:28:42,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13565, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=787, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=682, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14078, PETRI_PLACES=465, PETRI_TRANSITIONS=812} [2024-06-21 17:28:42,260 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 424 predicate places. [2024-06-21 17:28:42,260 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 812 transitions, 14078 flow [2024-06-21 17:28:42,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-21 17:28:42,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:28:42,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:28:42,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 17:28:42,261 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:28:42,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:28:42,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1503060779, now seen corresponding path program 2 times [2024-06-21 17:28:42,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:28:42,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755758630] [2024-06-21 17:28:42,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:28:42,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:28:42,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:28:42,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:28:42,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:28:42,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755758630] [2024-06-21 17:28:42,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755758630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:28:42,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:28:42,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:28:42,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309469849] [2024-06-21 17:28:42,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:28:42,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:28:42,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:28:42,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:28:42,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:28:42,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:28:42,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 812 transitions, 14078 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-21 17:28:42,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:28:42,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:28:42,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:28:45,975 INFO L124 PetriNetUnfolderBase]: 5645/8407 cut-off events. [2024-06-21 17:28:45,976 INFO L125 PetriNetUnfolderBase]: For 1960146/1960152 co-relation queries the response was YES. [2024-06-21 17:28:46,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95251 conditions, 8407 events. 5645/8407 cut-off events. For 1960146/1960152 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 47598 event pairs, 966 based on Foata normal form. 18/8423 useless extension candidates. Maximal degree in co-relation 95036. Up to 7921 conditions per place. [2024-06-21 17:28:46,124 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 716 selfloop transitions, 131 changer transitions 0/850 dead transitions. [2024-06-21 17:28:46,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 850 transitions, 16082 flow [2024-06-21 17:28:46,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:28:46,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:28:46,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 17:28:46,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 17:28:46,125 INFO L175 Difference]: Start difference. First operand has 465 places, 812 transitions, 14078 flow. Second operand 9 states and 150 transitions. [2024-06-21 17:28:46,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 850 transitions, 16082 flow [2024-06-21 17:28:52,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 850 transitions, 16045 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-21 17:28:52,131 INFO L231 Difference]: Finished difference. Result has 473 places, 814 transitions, 14402 flow [2024-06-21 17:28:52,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14043, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=812, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=681, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14402, PETRI_PLACES=473, PETRI_TRANSITIONS=814} [2024-06-21 17:28:52,131 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 432 predicate places. [2024-06-21 17:28:52,132 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 814 transitions, 14402 flow [2024-06-21 17:28:52,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-21 17:28:52,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:28:52,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:28:52,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 17:28:52,133 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:28:52,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:28:52,133 INFO L85 PathProgramCache]: Analyzing trace with hash 272385269, now seen corresponding path program 3 times [2024-06-21 17:28:52,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:28:52,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071990909] [2024-06-21 17:28:52,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:28:52,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:28:52,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:28:52,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:28:52,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:28:52,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071990909] [2024-06-21 17:28:52,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071990909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:28:52,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:28:52,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:28:52,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028090654] [2024-06-21 17:28:52,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:28:52,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:28:52,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:28:52,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:28:52,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:28:52,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:28:52,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 814 transitions, 14402 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-21 17:28:52,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:28:52,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:28:52,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:28:55,696 INFO L124 PetriNetUnfolderBase]: 5627/8381 cut-off events. [2024-06-21 17:28:55,697 INFO L125 PetriNetUnfolderBase]: For 1906801/1906809 co-relation queries the response was YES. [2024-06-21 17:28:55,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94653 conditions, 8381 events. 5627/8381 cut-off events. For 1906801/1906809 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 47446 event pairs, 950 based on Foata normal form. 16/8395 useless extension candidates. Maximal degree in co-relation 94435. Up to 7841 conditions per place. [2024-06-21 17:28:55,964 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 726 selfloop transitions, 127 changer transitions 0/856 dead transitions. [2024-06-21 17:28:55,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 856 transitions, 16417 flow [2024-06-21 17:28:55,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:28:55,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:28:55,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 17:28:55,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-21 17:28:55,965 INFO L175 Difference]: Start difference. First operand has 473 places, 814 transitions, 14402 flow. Second operand 9 states and 152 transitions. [2024-06-21 17:28:55,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 856 transitions, 16417 flow [2024-06-21 17:29:02,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 856 transitions, 16179 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 17:29:02,466 INFO L231 Difference]: Finished difference. Result has 478 places, 816 transitions, 14460 flow [2024-06-21 17:29:02,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14164, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=814, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=687, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14460, PETRI_PLACES=478, PETRI_TRANSITIONS=816} [2024-06-21 17:29:02,467 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 437 predicate places. [2024-06-21 17:29:02,467 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 816 transitions, 14460 flow [2024-06-21 17:29:02,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-21 17:29:02,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:29:02,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:29:02,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 17:29:02,467 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:29:02,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:29:02,467 INFO L85 PathProgramCache]: Analyzing trace with hash -2019265147, now seen corresponding path program 4 times [2024-06-21 17:29:02,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:29:02,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268885759] [2024-06-21 17:29:02,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:29:02,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:29:02,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:29:03,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:29:03,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:29:03,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268885759] [2024-06-21 17:29:03,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268885759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:29:03,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:29:03,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:29:03,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905817229] [2024-06-21 17:29:03,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:29:03,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:29:03,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:29:03,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:29:03,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:29:03,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:29:03,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 816 transitions, 14460 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-21 17:29:03,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:29:03,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:29:03,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:29:06,098 INFO L124 PetriNetUnfolderBase]: 5774/8612 cut-off events. [2024-06-21 17:29:06,099 INFO L125 PetriNetUnfolderBase]: For 2001812/2001820 co-relation queries the response was YES. [2024-06-21 17:29:06,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97440 conditions, 8612 events. 5774/8612 cut-off events. For 2001812/2001820 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 48973 event pairs, 914 based on Foata normal form. 16/8626 useless extension candidates. Maximal degree in co-relation 97220. Up to 7618 conditions per place. [2024-06-21 17:29:06,255 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 725 selfloop transitions, 137 changer transitions 0/865 dead transitions. [2024-06-21 17:29:06,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 865 transitions, 16829 flow [2024-06-21 17:29:06,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:29:06,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:29:06,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 17:29:06,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-21 17:29:06,256 INFO L175 Difference]: Start difference. First operand has 478 places, 816 transitions, 14460 flow. Second operand 9 states and 151 transitions. [2024-06-21 17:29:06,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 865 transitions, 16829 flow [2024-06-21 17:29:12,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 865 transitions, 16587 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 17:29:12,457 INFO L231 Difference]: Finished difference. Result has 484 places, 828 transitions, 14758 flow [2024-06-21 17:29:12,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14218, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=816, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=685, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14758, PETRI_PLACES=484, PETRI_TRANSITIONS=828} [2024-06-21 17:29:12,458 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 443 predicate places. [2024-06-21 17:29:12,458 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 828 transitions, 14758 flow [2024-06-21 17:29:12,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-21 17:29:12,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:29:12,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:29:12,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 17:29:12,459 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:29:12,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:29:12,459 INFO L85 PathProgramCache]: Analyzing trace with hash -158097732, now seen corresponding path program 4 times [2024-06-21 17:29:12,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:29:12,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005023690] [2024-06-21 17:29:12,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:29:12,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:29:12,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:29:13,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:29:13,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:29:13,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005023690] [2024-06-21 17:29:13,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005023690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:29:13,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:29:13,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:29:13,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781702506] [2024-06-21 17:29:13,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:29:13,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:29:13,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:29:13,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:29:13,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:29:13,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:29:13,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 828 transitions, 14758 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:29:13,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:29:13,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:29:13,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:29:16,121 INFO L124 PetriNetUnfolderBase]: 5771/8617 cut-off events. [2024-06-21 17:29:16,121 INFO L125 PetriNetUnfolderBase]: For 1977207/1977211 co-relation queries the response was YES. [2024-06-21 17:29:16,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98162 conditions, 8617 events. 5771/8617 cut-off events. For 1977207/1977211 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 49370 event pairs, 1379 based on Foata normal form. 5/8620 useless extension candidates. Maximal degree in co-relation 97938. Up to 8402 conditions per place. [2024-06-21 17:29:16,266 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 762 selfloop transitions, 88 changer transitions 0/853 dead transitions. [2024-06-21 17:29:16,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 853 transitions, 16564 flow [2024-06-21 17:29:16,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:29:16,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:29:16,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-21 17:29:16,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3972222222222222 [2024-06-21 17:29:16,267 INFO L175 Difference]: Start difference. First operand has 484 places, 828 transitions, 14758 flow. Second operand 9 states and 143 transitions. [2024-06-21 17:29:16,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 853 transitions, 16564 flow [2024-06-21 17:29:23,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 853 transitions, 16394 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-21 17:29:23,615 INFO L231 Difference]: Finished difference. Result has 489 places, 828 transitions, 14779 flow [2024-06-21 17:29:23,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14588, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=828, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=740, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14779, PETRI_PLACES=489, PETRI_TRANSITIONS=828} [2024-06-21 17:29:23,616 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 448 predicate places. [2024-06-21 17:29:23,616 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 828 transitions, 14779 flow [2024-06-21 17:29:23,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:29:23,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:29:23,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:29:23,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 17:29:23,616 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:29:23,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:29:23,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1897118131, now seen corresponding path program 1 times [2024-06-21 17:29:23,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:29:23,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824807106] [2024-06-21 17:29:23,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:29:23,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:29:23,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:29:24,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:29:24,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:29:24,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824807106] [2024-06-21 17:29:24,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824807106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:29:24,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:29:24,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:29:24,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355675172] [2024-06-21 17:29:24,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:29:24,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:29:24,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:29:24,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:29:24,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:29:24,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:29:24,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 828 transitions, 14779 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:29:24,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:29:24,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:29:24,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:29:27,181 INFO L124 PetriNetUnfolderBase]: 5814/8675 cut-off events. [2024-06-21 17:29:27,181 INFO L125 PetriNetUnfolderBase]: For 2023285/2023330 co-relation queries the response was YES. [2024-06-21 17:29:27,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99002 conditions, 8675 events. 5814/8675 cut-off events. For 2023285/2023330 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 49576 event pairs, 1105 based on Foata normal form. 32/8693 useless extension candidates. Maximal degree in co-relation 98777. Up to 8420 conditions per place. [2024-06-21 17:29:27,349 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 779 selfloop transitions, 98 changer transitions 0/880 dead transitions. [2024-06-21 17:29:27,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 880 transitions, 17321 flow [2024-06-21 17:29:27,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:29:27,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:29:27,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-21 17:29:27,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.395 [2024-06-21 17:29:27,350 INFO L175 Difference]: Start difference. First operand has 489 places, 828 transitions, 14779 flow. Second operand 10 states and 158 transitions. [2024-06-21 17:29:27,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 880 transitions, 17321 flow [2024-06-21 17:29:35,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 880 transitions, 17160 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 17:29:35,248 INFO L231 Difference]: Finished difference. Result has 496 places, 848 transitions, 15238 flow [2024-06-21 17:29:35,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14620, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=828, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=734, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15238, PETRI_PLACES=496, PETRI_TRANSITIONS=848} [2024-06-21 17:29:35,248 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 455 predicate places. [2024-06-21 17:29:35,249 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 848 transitions, 15238 flow [2024-06-21 17:29:35,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:29:35,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:29:35,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:29:35,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 17:29:35,249 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:29:35,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:29:35,250 INFO L85 PathProgramCache]: Analyzing trace with hash 419788573, now seen corresponding path program 2 times [2024-06-21 17:29:35,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:29:35,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651083863] [2024-06-21 17:29:35,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:29:35,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:29:35,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:29:35,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:29:35,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:29:35,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651083863] [2024-06-21 17:29:35,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651083863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:29:35,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:29:35,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:29:35,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472723386] [2024-06-21 17:29:35,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:29:35,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:29:35,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:29:35,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:29:35,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:29:35,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:29:35,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 848 transitions, 15238 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-21 17:29:35,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:29:35,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:29:35,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:29:38,677 INFO L124 PetriNetUnfolderBase]: 5843/8717 cut-off events. [2024-06-21 17:29:38,677 INFO L125 PetriNetUnfolderBase]: For 2069387/2069432 co-relation queries the response was YES. [2024-06-21 17:29:38,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101325 conditions, 8717 events. 5843/8717 cut-off events. For 2069387/2069432 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 49856 event pairs, 1107 based on Foata normal form. 32/8735 useless extension candidates. Maximal degree in co-relation 101096. Up to 8400 conditions per place. [2024-06-21 17:29:38,829 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 766 selfloop transitions, 119 changer transitions 0/888 dead transitions. [2024-06-21 17:29:38,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 888 transitions, 17670 flow [2024-06-21 17:29:38,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:29:38,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:29:38,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-21 17:29:38,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-21 17:29:38,830 INFO L175 Difference]: Start difference. First operand has 496 places, 848 transitions, 15238 flow. Second operand 9 states and 147 transitions. [2024-06-21 17:29:38,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 888 transitions, 17670 flow [2024-06-21 17:29:46,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 888 transitions, 17479 flow, removed 65 selfloop flow, removed 2 redundant places. [2024-06-21 17:29:46,770 INFO L231 Difference]: Finished difference. Result has 504 places, 859 transitions, 15604 flow [2024-06-21 17:29:46,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15073, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=848, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=734, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15604, PETRI_PLACES=504, PETRI_TRANSITIONS=859} [2024-06-21 17:29:46,771 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 463 predicate places. [2024-06-21 17:29:46,771 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 859 transitions, 15604 flow [2024-06-21 17:29:46,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-21 17:29:46,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:29:46,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:29:46,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 17:29:46,772 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:29:46,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:29:46,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1068917329, now seen corresponding path program 1 times [2024-06-21 17:29:46,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:29:46,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871945562] [2024-06-21 17:29:46,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:29:46,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:29:46,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:29:47,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:29:47,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:29:47,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871945562] [2024-06-21 17:29:47,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871945562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:29:47,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:29:47,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:29:47,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892100084] [2024-06-21 17:29:47,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:29:47,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:29:47,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:29:47,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:29:47,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:29:47,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:29:47,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 859 transitions, 15604 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:29:47,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:29:47,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:29:47,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:29:50,319 INFO L124 PetriNetUnfolderBase]: 5895/8786 cut-off events. [2024-06-21 17:29:50,319 INFO L125 PetriNetUnfolderBase]: For 2151594/2151604 co-relation queries the response was YES. [2024-06-21 17:29:50,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103255 conditions, 8786 events. 5895/8786 cut-off events. For 2151594/2151604 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 50297 event pairs, 1109 based on Foata normal form. 14/8798 useless extension candidates. Maximal degree in co-relation 103023. Up to 8289 conditions per place. [2024-06-21 17:29:50,474 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 738 selfloop transitions, 163 changer transitions 0/904 dead transitions. [2024-06-21 17:29:50,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 904 transitions, 18064 flow [2024-06-21 17:29:50,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:29:50,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:29:50,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-21 17:29:50,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4275 [2024-06-21 17:29:50,475 INFO L175 Difference]: Start difference. First operand has 504 places, 859 transitions, 15604 flow. Second operand 10 states and 171 transitions. [2024-06-21 17:29:50,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 904 transitions, 18064 flow [2024-06-21 17:29:58,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 904 transitions, 17847 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-21 17:29:58,655 INFO L231 Difference]: Finished difference. Result has 511 places, 868 transitions, 15959 flow [2024-06-21 17:29:58,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15387, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=859, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=700, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15959, PETRI_PLACES=511, PETRI_TRANSITIONS=868} [2024-06-21 17:29:58,655 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 470 predicate places. [2024-06-21 17:29:58,655 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 868 transitions, 15959 flow [2024-06-21 17:29:58,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:29:58,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:29:58,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:29:58,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 17:29:58,656 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:29:58,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:29:58,656 INFO L85 PathProgramCache]: Analyzing trace with hash -2007047817, now seen corresponding path program 3 times [2024-06-21 17:29:58,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:29:58,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358586578] [2024-06-21 17:29:58,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:29:58,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:29:58,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:29:59,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:29:59,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:29:59,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358586578] [2024-06-21 17:29:59,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358586578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:29:59,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:29:59,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:29:59,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322164184] [2024-06-21 17:29:59,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:29:59,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:29:59,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:29:59,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:29:59,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:29:59,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:29:59,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 868 transitions, 15959 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:29:59,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:29:59,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:29:59,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:30:02,300 INFO L124 PetriNetUnfolderBase]: 5905/8800 cut-off events. [2024-06-21 17:30:02,300 INFO L125 PetriNetUnfolderBase]: For 2172803/2172813 co-relation queries the response was YES. [2024-06-21 17:30:02,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105308 conditions, 8800 events. 5905/8800 cut-off events. For 2172803/2172813 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 50402 event pairs, 1080 based on Foata normal form. 12/8810 useless extension candidates. Maximal degree in co-relation 105073. Up to 8545 conditions per place. [2024-06-21 17:30:02,464 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 791 selfloop transitions, 109 changer transitions 0/903 dead transitions. [2024-06-21 17:30:02,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 903 transitions, 17998 flow [2024-06-21 17:30:02,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:30:02,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:30:02,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-21 17:30:02,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3975 [2024-06-21 17:30:02,465 INFO L175 Difference]: Start difference. First operand has 511 places, 868 transitions, 15959 flow. Second operand 10 states and 159 transitions. [2024-06-21 17:30:02,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 903 transitions, 17998 flow [2024-06-21 17:30:11,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 903 transitions, 17819 flow, removed 61 selfloop flow, removed 3 redundant places. [2024-06-21 17:30:11,523 INFO L231 Difference]: Finished difference. Result has 518 places, 873 transitions, 16124 flow [2024-06-21 17:30:11,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15780, PETRI_DIFFERENCE_MINUEND_PLACES=508, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=868, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=759, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16124, PETRI_PLACES=518, PETRI_TRANSITIONS=873} [2024-06-21 17:30:11,524 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 477 predicate places. [2024-06-21 17:30:11,524 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 873 transitions, 16124 flow [2024-06-21 17:30:11,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:30:11,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:30:11,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:30:11,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 17:30:11,524 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:30:11,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:30:11,524 INFO L85 PathProgramCache]: Analyzing trace with hash -803615917, now seen corresponding path program 2 times [2024-06-21 17:30:11,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:30:11,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639199600] [2024-06-21 17:30:11,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:30:11,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:30:11,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:30:11,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:30:11,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:30:11,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639199600] [2024-06-21 17:30:11,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639199600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:30:11,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:30:11,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:30:11,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673532097] [2024-06-21 17:30:11,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:30:11,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:30:11,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:30:11,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:30:11,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:30:12,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:30:12,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 873 transitions, 16124 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:30:12,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:30:12,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:30:12,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:30:15,170 INFO L124 PetriNetUnfolderBase]: 5925/8828 cut-off events. [2024-06-21 17:30:15,171 INFO L125 PetriNetUnfolderBase]: For 2225119/2225129 co-relation queries the response was YES. [2024-06-21 17:30:15,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105804 conditions, 8828 events. 5925/8828 cut-off events. For 2225119/2225129 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 50522 event pairs, 1138 based on Foata normal form. 14/8840 useless extension candidates. Maximal degree in co-relation 105567. Up to 8410 conditions per place. [2024-06-21 17:30:15,325 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 761 selfloop transitions, 141 changer transitions 0/905 dead transitions. [2024-06-21 17:30:15,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 905 transitions, 18158 flow [2024-06-21 17:30:15,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:30:15,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:30:15,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-21 17:30:15,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 17:30:15,326 INFO L175 Difference]: Start difference. First operand has 518 places, 873 transitions, 16124 flow. Second operand 10 states and 160 transitions. [2024-06-21 17:30:15,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 905 transitions, 18158 flow [2024-06-21 17:30:24,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 905 transitions, 17911 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 17:30:24,405 INFO L231 Difference]: Finished difference. Result has 522 places, 876 transitions, 16245 flow [2024-06-21 17:30:24,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15877, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=873, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=732, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16245, PETRI_PLACES=522, PETRI_TRANSITIONS=876} [2024-06-21 17:30:24,406 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 481 predicate places. [2024-06-21 17:30:24,406 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 876 transitions, 16245 flow [2024-06-21 17:30:24,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:30:24,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:30:24,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:30:24,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 17:30:24,406 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:30:24,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:30:24,406 INFO L85 PathProgramCache]: Analyzing trace with hash -810974263, now seen corresponding path program 4 times [2024-06-21 17:30:24,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:30:24,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754094267] [2024-06-21 17:30:24,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:30:24,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:30:24,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:30:24,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:30:24,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:30:24,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754094267] [2024-06-21 17:30:24,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754094267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:30:24,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:30:24,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:30:24,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932337515] [2024-06-21 17:30:24,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:30:24,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:30:24,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:30:24,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:30:24,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:30:25,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:30:25,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 876 transitions, 16245 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-21 17:30:25,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:30:25,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:30:25,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:30:28,102 INFO L124 PetriNetUnfolderBase]: 5919/8820 cut-off events. [2024-06-21 17:30:28,102 INFO L125 PetriNetUnfolderBase]: For 2222504/2222514 co-relation queries the response was YES. [2024-06-21 17:30:28,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105922 conditions, 8820 events. 5919/8820 cut-off events. For 2222504/2222514 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 50479 event pairs, 1109 based on Foata normal form. 12/8830 useless extension candidates. Maximal degree in co-relation 105684. Up to 8610 conditions per place. [2024-06-21 17:30:28,259 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 808 selfloop transitions, 92 changer transitions 0/903 dead transitions. [2024-06-21 17:30:28,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 903 transitions, 18165 flow [2024-06-21 17:30:28,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:30:28,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:30:28,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-06-21 17:30:28,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3825 [2024-06-21 17:30:28,260 INFO L175 Difference]: Start difference. First operand has 522 places, 876 transitions, 16245 flow. Second operand 10 states and 153 transitions. [2024-06-21 17:30:28,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 903 transitions, 18165 flow