./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe012_pso.oepc_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/safe012_pso.oepc_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe012_pso.oepc_pso.opt_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe012_pso.oepc_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-7724a2d-m [2024-06-27 21:05:38,783 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:05:38,861 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:05:38,868 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:05:38,868 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:05:38,886 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:05:38,888 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:05:38,889 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:05:38,889 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:05:38,894 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:05:38,894 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:05:38,894 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:05:38,895 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:05:38,896 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:05:38,896 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:05:38,896 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:05:38,897 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:05:38,897 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:05:38,897 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:05:38,897 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:05:38,897 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:05:38,898 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:05:38,898 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:05:38,898 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:05:38,898 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:05:38,898 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:05:38,899 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:05:38,899 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:05:38,899 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:05:38,899 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:05:38,900 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:05:38,900 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:05:38,901 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:05:38,901 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:05:38,901 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:05:38,901 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:05:38,901 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:05:38,901 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:05:38,902 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:05:38,902 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:05:38,902 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:05:38,902 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:05:38,902 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:05:38,903 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 21:05:39,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:05:39,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:05:39,130 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:05:39,131 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:05:39,132 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:05:39,133 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe012_pso.oepc_pso.opt_rmo.opt.yml/witness.yml [2024-06-27 21:05:39,343 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:05:39,343 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:05:39,343 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe012_pso.oepc_pso.opt_rmo.opt.i [2024-06-27 21:05:40,443 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:05:40,675 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:05:40,675 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe012_pso.oepc_pso.opt_rmo.opt.i [2024-06-27 21:05:40,687 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f06bae01/ab68427a189643ef973e5dc0c9675ae3/FLAG0fde911d9 [2024-06-27 21:05:40,696 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f06bae01/ab68427a189643ef973e5dc0c9675ae3 [2024-06-27 21:05:40,697 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:05:40,698 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:05:40,699 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:05:40,699 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:05:40,703 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:05:40,703 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:05:39" (1/2) ... [2024-06-27 21:05:40,704 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@623b66c6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:05:40, skipping insertion in model container [2024-06-27 21:05:40,704 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:05:39" (1/2) ... [2024-06-27 21:05:40,705 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1e0a4598 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:05:40, skipping insertion in model container [2024-06-27 21:05:40,705 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:05:40" (2/2) ... [2024-06-27 21:05:40,705 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@623b66c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:05:40, skipping insertion in model container [2024-06-27 21:05:40,706 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:05:40" (2/2) ... [2024-06-27 21:05:40,706 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:05:40,787 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:05:40,788 INFO L97 edCorrectnessWitness]: Location invariant before [L836-L836] ((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1)) [2024-06-27 21:05:40,788 INFO L97 edCorrectnessWitness]: Location invariant before [L834-L834] ((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1)) [2024-06-27 21:05:40,788 INFO L97 edCorrectnessWitness]: Location invariant before [L837-L837] ((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1)) [2024-06-27 21:05:40,789 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:05:40,789 INFO L106 edCorrectnessWitness]: ghost_update [L832-L832] multithreaded = 1; [2024-06-27 21:05:40,825 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:05:41,170 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:05:41,179 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 21:05:41,275 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:05:41,308 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:05:41,309 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:05:41 WrapperNode [2024-06-27 21:05:41,309 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:05:41,310 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:05:41,310 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:05:41,310 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:05:41,315 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:05:41" (1/1) ... [2024-06-27 21:05:41,341 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:05:41" (1/1) ... [2024-06-27 21:05:41,368 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 126 [2024-06-27 21:05:41,368 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:05:41,369 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:05:41,369 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:05:41,369 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:05:41,381 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:05:41" (1/1) ... [2024-06-27 21:05:41,381 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:05:41" (1/1) ... [2024-06-27 21:05:41,384 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:05:41" (1/1) ... [2024-06-27 21:05:41,406 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 21:05:41,407 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:05:41" (1/1) ... [2024-06-27 21:05:41,407 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:05:41" (1/1) ... [2024-06-27 21:05:41,415 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:05:41" (1/1) ... [2024-06-27 21:05:41,422 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:05:41" (1/1) ... [2024-06-27 21:05:41,423 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:05:41" (1/1) ... [2024-06-27 21:05:41,429 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:05:41" (1/1) ... [2024-06-27 21:05:41,435 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:05:41,438 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:05:41,438 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:05:41,438 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:05:41,439 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:05:41" (1/1) ... [2024-06-27 21:05:41,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:05:41,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:05:41,460 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 21:05:41,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 21:05:41,518 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 21:05:41,518 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:05:41,518 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 21:05:41,518 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 21:05:41,519 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 21:05:41,519 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 21:05:41,519 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 21:05:41,519 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 21:05:41,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:05:41,520 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 21:05:41,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:05:41,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:05:41,521 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 21:05:41,647 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:05:41,649 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:05:41,907 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:05:41,907 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:05:42,028 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:05:42,029 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 21:05:42,029 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:05:42 BoogieIcfgContainer [2024-06-27 21:05:42,029 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:05:42,030 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:05:42,031 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:05:42,033 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:05:42,033 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:05:39" (1/4) ... [2024-06-27 21:05:42,033 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51532529 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:05:42, skipping insertion in model container [2024-06-27 21:05:42,034 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:05:40" (2/4) ... [2024-06-27 21:05:42,034 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51532529 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:05:42, skipping insertion in model container [2024-06-27 21:05:42,034 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:05:41" (3/4) ... [2024-06-27 21:05:42,034 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51532529 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:05:42, skipping insertion in model container [2024-06-27 21:05:42,034 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:05:42" (4/4) ... [2024-06-27 21:05:42,035 INFO L112 eAbstractionObserver]: Analyzing ICFG safe012_pso.oepc_pso.opt_rmo.opt.i [2024-06-27 21:05:42,047 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:05:42,048 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 21:05:42,048 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:05:42,079 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 21:05:42,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-27 21:05:42,122 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-27 21:05:42,123 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:05:42,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 21:05:42,125 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-27 21:05:42,129 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-27 21:05:42,138 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:05:42,144 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;@10a5dc3e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:05:42,145 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 21:05:42,150 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:05:42,150 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 21:05:42,150 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:05:42,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:42,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 21:05:42,151 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:42,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:42,156 INFO L85 PathProgramCache]: Analyzing trace with hash 362810851, now seen corresponding path program 1 times [2024-06-27 21:05:42,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:42,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464002833] [2024-06-27 21:05:42,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:42,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:42,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:42,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:42,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:42,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464002833] [2024-06-27 21:05:42,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464002833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:42,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:42,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:05:42,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983152506] [2024-06-27 21:05:42,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:42,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:05:42,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:43,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:05:43,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:05:43,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-27 21:05:43,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:43,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:43,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-27 21:05:43,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:43,352 INFO L124 PetriNetUnfolderBase]: 891/1368 cut-off events. [2024-06-27 21:05:43,352 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-06-27 21:05:43,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2789 conditions, 1368 events. 891/1368 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6471 event pairs, 520 based on Foata normal form. 2/1340 useless extension candidates. Maximal degree in co-relation 2777. Up to 1335 conditions per place. [2024-06-27 21:05:43,364 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 31 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-27 21:05:43,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 42 transitions, 169 flow [2024-06-27 21:05:43,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:05:43,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:05:43,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-06-27 21:05:43,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-06-27 21:05:43,392 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 77 transitions. [2024-06-27 21:05:43,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 42 transitions, 169 flow [2024-06-27 21:05:43,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 42 transitions, 164 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 21:05:43,397 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-27 21:05:43,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-27 21:05:43,401 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-27 21:05:43,401 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-27 21:05:43,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:43,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:43,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:43,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:05:43,402 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:43,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:43,403 INFO L85 PathProgramCache]: Analyzing trace with hash 746924961, now seen corresponding path program 1 times [2024-06-27 21:05:43,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:43,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138166018] [2024-06-27 21:05:43,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:43,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:43,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:44,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:44,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:44,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138166018] [2024-06-27 21:05:44,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138166018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:44,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:44,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:05:44,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37551165] [2024-06-27 21:05:44,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:44,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:05:44,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:44,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:05:44,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:05:44,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-27 21:05:44,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:44,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:44,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-27 21:05:44,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:44,798 INFO L124 PetriNetUnfolderBase]: 1131/1721 cut-off events. [2024-06-27 21:05:44,799 INFO L125 PetriNetUnfolderBase]: For 341/355 co-relation queries the response was YES. [2024-06-27 21:05:44,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3989 conditions, 1721 events. 1131/1721 cut-off events. For 341/355 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 7893 event pairs, 589 based on Foata normal form. 13/1728 useless extension candidates. Maximal degree in co-relation 3977. Up to 1639 conditions per place. [2024-06-27 21:05:44,807 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 37 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2024-06-27 21:05:44,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 49 transitions, 222 flow [2024-06-27 21:05:44,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:05:44,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:05:44,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-06-27 21:05:44,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-27 21:05:44,809 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 94 transitions. [2024-06-27 21:05:44,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 49 transitions, 222 flow [2024-06-27 21:05:44,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 49 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:05:44,811 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 121 flow [2024-06-27 21:05:44,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=121, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2024-06-27 21:05:44,811 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2024-06-27 21:05:44,812 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 121 flow [2024-06-27 21:05:44,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:44,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:44,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:44,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 21:05:44,813 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:44,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:44,813 INFO L85 PathProgramCache]: Analyzing trace with hash 934192984, now seen corresponding path program 1 times [2024-06-27 21:05:44,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:44,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27144226] [2024-06-27 21:05:44,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:44,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:44,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:45,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:45,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:45,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27144226] [2024-06-27 21:05:45,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27144226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:45,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:45,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:05:45,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199784923] [2024-06-27 21:05:45,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:45,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:05:45,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:45,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:05:45,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:05:45,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-27 21:05:45,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 121 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:45,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:45,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-27 21:05:45,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:45,582 INFO L124 PetriNetUnfolderBase]: 888/1371 cut-off events. [2024-06-27 21:05:45,583 INFO L125 PetriNetUnfolderBase]: For 720/723 co-relation queries the response was YES. [2024-06-27 21:05:45,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3475 conditions, 1371 events. 888/1371 cut-off events. For 720/723 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6384 event pairs, 408 based on Foata normal form. 6/1374 useless extension candidates. Maximal degree in co-relation 3460. Up to 1326 conditions per place. [2024-06-27 21:05:45,590 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 39 selfloop transitions, 8 changer transitions 0/53 dead transitions. [2024-06-27 21:05:45,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 53 transitions, 271 flow [2024-06-27 21:05:45,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:05:45,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:05:45,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2024-06-27 21:05:45,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.495 [2024-06-27 21:05:45,592 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 121 flow. Second operand 5 states and 99 transitions. [2024-06-27 21:05:45,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 53 transitions, 271 flow [2024-06-27 21:05:45,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 254 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 21:05:45,595 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 170 flow [2024-06-27 21:05:45,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2024-06-27 21:05:45,595 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 6 predicate places. [2024-06-27 21:05:45,596 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 170 flow [2024-06-27 21:05:45,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:45,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:45,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:45,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 21:05:45,596 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:45,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:45,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1104787214, now seen corresponding path program 1 times [2024-06-27 21:05:45,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:45,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012096527] [2024-06-27 21:05:45,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:45,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:45,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:46,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:46,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:46,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012096527] [2024-06-27 21:05:46,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012096527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:46,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:46,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:05:46,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809765864] [2024-06-27 21:05:46,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:46,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:05:46,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:46,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:05:46,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:05:46,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 21:05:46,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 170 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:46,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:46,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 21:05:46,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:46,510 INFO L124 PetriNetUnfolderBase]: 1047/1601 cut-off events. [2024-06-27 21:05:46,510 INFO L125 PetriNetUnfolderBase]: For 1527/1527 co-relation queries the response was YES. [2024-06-27 21:05:46,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4594 conditions, 1601 events. 1047/1601 cut-off events. For 1527/1527 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7559 event pairs, 479 based on Foata normal form. 4/1603 useless extension candidates. Maximal degree in co-relation 4576. Up to 1534 conditions per place. [2024-06-27 21:05:46,518 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 51 selfloop transitions, 11 changer transitions 0/67 dead transitions. [2024-06-27 21:05:46,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 67 transitions, 379 flow [2024-06-27 21:05:46,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:05:46,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:05:46,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-27 21:05:46,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708333333333333 [2024-06-27 21:05:46,520 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 170 flow. Second operand 6 states and 113 transitions. [2024-06-27 21:05:46,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 67 transitions, 379 flow [2024-06-27 21:05:46,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 67 transitions, 360 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 21:05:46,523 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 242 flow [2024-06-27 21:05:46,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=242, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2024-06-27 21:05:46,523 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2024-06-27 21:05:46,524 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 242 flow [2024-06-27 21:05:46,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:46,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:46,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:46,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 21:05:46,524 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:46,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:46,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1136444429, now seen corresponding path program 1 times [2024-06-27 21:05:46,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:46,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810967941] [2024-06-27 21:05:46,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:46,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:46,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:47,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:47,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:47,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810967941] [2024-06-27 21:05:47,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810967941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:47,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:47,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:05:47,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894419263] [2024-06-27 21:05:47,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:47,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:05:47,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:47,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:05:47,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:05:47,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 21:05:47,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 242 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:47,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:47,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 21:05:47,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:47,728 INFO L124 PetriNetUnfolderBase]: 1053/1610 cut-off events. [2024-06-27 21:05:47,728 INFO L125 PetriNetUnfolderBase]: For 2521/2521 co-relation queries the response was YES. [2024-06-27 21:05:47,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5102 conditions, 1610 events. 1053/1610 cut-off events. For 2521/2521 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7678 event pairs, 461 based on Foata normal form. 4/1612 useless extension candidates. Maximal degree in co-relation 5080. Up to 1525 conditions per place. [2024-06-27 21:05:47,738 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 55 selfloop transitions, 15 changer transitions 0/75 dead transitions. [2024-06-27 21:05:47,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 75 transitions, 456 flow [2024-06-27 21:05:47,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:05:47,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:05:47,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-27 21:05:47,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46785714285714286 [2024-06-27 21:05:47,741 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 242 flow. Second operand 7 states and 131 transitions. [2024-06-27 21:05:47,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 75 transitions, 456 flow [2024-06-27 21:05:47,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 75 transitions, 450 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-27 21:05:47,748 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 301 flow [2024-06-27 21:05:47,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=301, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2024-06-27 21:05:47,750 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2024-06-27 21:05:47,751 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 301 flow [2024-06-27 21:05:47,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:47,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:47,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:47,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 21:05:47,754 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:47,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:47,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1021043945, now seen corresponding path program 1 times [2024-06-27 21:05:47,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:47,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407526303] [2024-06-27 21:05:47,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:47,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:47,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:48,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:48,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:48,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407526303] [2024-06-27 21:05:48,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407526303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:48,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:48,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:05:48,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618303915] [2024-06-27 21:05:48,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:48,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:05:48,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:48,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:05:48,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:05:48,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 21:05:48,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 301 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:48,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:48,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 21:05:48,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:49,010 INFO L124 PetriNetUnfolderBase]: 1276/1945 cut-off events. [2024-06-27 21:05:49,011 INFO L125 PetriNetUnfolderBase]: For 4885/4920 co-relation queries the response was YES. [2024-06-27 21:05:49,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6771 conditions, 1945 events. 1276/1945 cut-off events. For 4885/4920 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 9213 event pairs, 452 based on Foata normal form. 15/1910 useless extension candidates. Maximal degree in co-relation 6746. Up to 1793 conditions per place. [2024-06-27 21:05:49,022 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 46 selfloop transitions, 16 changer transitions 0/71 dead transitions. [2024-06-27 21:05:49,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 71 transitions, 485 flow [2024-06-27 21:05:49,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:05:49,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:05:49,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2024-06-27 21:05:49,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49 [2024-06-27 21:05:49,024 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 301 flow. Second operand 5 states and 98 transitions. [2024-06-27 21:05:49,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 71 transitions, 485 flow [2024-06-27 21:05:49,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 71 transitions, 450 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 21:05:49,029 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 341 flow [2024-06-27 21:05:49,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=341, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2024-06-27 21:05:49,032 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2024-06-27 21:05:49,032 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 341 flow [2024-06-27 21:05:49,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:49,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:49,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:49,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 21:05:49,033 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:49,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:49,033 INFO L85 PathProgramCache]: Analyzing trace with hash 870040347, now seen corresponding path program 1 times [2024-06-27 21:05:49,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:49,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988466043] [2024-06-27 21:05:49,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:49,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:49,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:49,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:49,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:49,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988466043] [2024-06-27 21:05:49,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988466043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:49,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:49,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:05:49,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226162107] [2024-06-27 21:05:49,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:49,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:05:49,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:49,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:05:49,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:05:50,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 21:05:50,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 341 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:50,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:50,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 21:05:50,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:50,405 INFO L124 PetriNetUnfolderBase]: 1112/1712 cut-off events. [2024-06-27 21:05:50,405 INFO L125 PetriNetUnfolderBase]: For 5598/5598 co-relation queries the response was YES. [2024-06-27 21:05:50,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6378 conditions, 1712 events. 1112/1712 cut-off events. For 5598/5598 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 8351 event pairs, 435 based on Foata normal form. 24/1734 useless extension candidates. Maximal degree in co-relation 6352. Up to 1489 conditions per place. [2024-06-27 21:05:50,415 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 67 selfloop transitions, 17 changer transitions 0/89 dead transitions. [2024-06-27 21:05:50,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 89 transitions, 615 flow [2024-06-27 21:05:50,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:05:50,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:05:50,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 21:05:50,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-27 21:05:50,417 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 341 flow. Second operand 8 states and 152 transitions. [2024-06-27 21:05:50,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 89 transitions, 615 flow [2024-06-27 21:05:50,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 89 transitions, 574 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-27 21:05:50,422 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 361 flow [2024-06-27 21:05:50,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=361, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2024-06-27 21:05:50,423 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 23 predicate places. [2024-06-27 21:05:50,423 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 361 flow [2024-06-27 21:05:50,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:50,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:50,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:50,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 21:05:50,424 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:50,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:50,424 INFO L85 PathProgramCache]: Analyzing trace with hash 994368211, now seen corresponding path program 1 times [2024-06-27 21:05:50,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:50,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204763388] [2024-06-27 21:05:50,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:50,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:50,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:51,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:51,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:51,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204763388] [2024-06-27 21:05:51,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204763388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:51,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:51,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:05:51,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453361878] [2024-06-27 21:05:51,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:51,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:05:51,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:51,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:05:51,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:05:51,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:05:51,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 361 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:51,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:51,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:05:51,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:51,708 INFO L124 PetriNetUnfolderBase]: 1372/2089 cut-off events. [2024-06-27 21:05:51,708 INFO L125 PetriNetUnfolderBase]: For 5738/5742 co-relation queries the response was YES. [2024-06-27 21:05:51,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7520 conditions, 2089 events. 1372/2089 cut-off events. For 5738/5742 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9909 event pairs, 477 based on Foata normal form. 3/2090 useless extension candidates. Maximal degree in co-relation 7493. Up to 1948 conditions per place. [2024-06-27 21:05:51,728 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 65 selfloop transitions, 19 changer transitions 0/88 dead transitions. [2024-06-27 21:05:51,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 88 transitions, 655 flow [2024-06-27 21:05:51,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:05:51,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:05:51,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-27 21:05:51,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-27 21:05:51,732 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 361 flow. Second operand 6 states and 112 transitions. [2024-06-27 21:05:51,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 88 transitions, 655 flow [2024-06-27 21:05:51,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 88 transitions, 622 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 21:05:51,738 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 472 flow [2024-06-27 21:05:51,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=472, PETRI_PLACES=66, PETRI_TRANSITIONS=68} [2024-06-27 21:05:51,739 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 25 predicate places. [2024-06-27 21:05:51,740 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 472 flow [2024-06-27 21:05:51,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:51,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:51,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:51,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 21:05:51,740 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:51,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:51,741 INFO L85 PathProgramCache]: Analyzing trace with hash -773997575, now seen corresponding path program 1 times [2024-06-27 21:05:51,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:51,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234267470] [2024-06-27 21:05:51,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:51,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:51,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:52,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:52,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:52,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234267470] [2024-06-27 21:05:52,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234267470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:52,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:52,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:05:52,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877902963] [2024-06-27 21:05:52,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:52,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:05:52,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:52,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:05:52,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:05:52,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:05:52,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 68 transitions, 472 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:52,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:52,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:05:52,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:52,807 INFO L124 PetriNetUnfolderBase]: 1366/2087 cut-off events. [2024-06-27 21:05:52,807 INFO L125 PetriNetUnfolderBase]: For 7246/7246 co-relation queries the response was YES. [2024-06-27 21:05:52,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7982 conditions, 2087 events. 1366/2087 cut-off events. For 7246/7246 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9941 event pairs, 469 based on Foata normal form. 2/2088 useless extension candidates. Maximal degree in co-relation 7952. Up to 2048 conditions per place. [2024-06-27 21:05:52,820 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 72 selfloop transitions, 9 changer transitions 0/85 dead transitions. [2024-06-27 21:05:52,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 85 transitions, 712 flow [2024-06-27 21:05:52,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:05:52,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:05:52,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-27 21:05:52,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44 [2024-06-27 21:05:52,821 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 472 flow. Second operand 5 states and 88 transitions. [2024-06-27 21:05:52,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 85 transitions, 712 flow [2024-06-27 21:05:52,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 85 transitions, 692 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-27 21:05:52,829 INFO L231 Difference]: Finished difference. Result has 71 places, 75 transitions, 541 flow [2024-06-27 21:05:52,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=541, PETRI_PLACES=71, PETRI_TRANSITIONS=75} [2024-06-27 21:05:52,829 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 30 predicate places. [2024-06-27 21:05:52,830 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 75 transitions, 541 flow [2024-06-27 21:05:52,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:52,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:52,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:52,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 21:05:52,830 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:52,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:52,831 INFO L85 PathProgramCache]: Analyzing trace with hash -2135018824, now seen corresponding path program 1 times [2024-06-27 21:05:52,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:52,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518944187] [2024-06-27 21:05:52,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:52,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:52,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:53,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:53,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:53,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518944187] [2024-06-27 21:05:53,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518944187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:53,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:53,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:05:53,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272810503] [2024-06-27 21:05:53,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:53,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:05:53,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:53,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:05:53,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:05:53,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 21:05:53,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 75 transitions, 541 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:53,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:53,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 21:05:53,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:54,210 INFO L124 PetriNetUnfolderBase]: 1323/2044 cut-off events. [2024-06-27 21:05:54,211 INFO L125 PetriNetUnfolderBase]: For 7494/7526 co-relation queries the response was YES. [2024-06-27 21:05:54,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7882 conditions, 2044 events. 1323/2044 cut-off events. For 7494/7526 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 9979 event pairs, 303 based on Foata normal form. 11/2004 useless extension candidates. Maximal degree in co-relation 7848. Up to 1864 conditions per place. [2024-06-27 21:05:54,222 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 64 selfloop transitions, 17 changer transitions 0/94 dead transitions. [2024-06-27 21:05:54,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 94 transitions, 757 flow [2024-06-27 21:05:54,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:05:54,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:05:54,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-27 21:05:54,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708333333333333 [2024-06-27 21:05:54,224 INFO L175 Difference]: Start difference. First operand has 71 places, 75 transitions, 541 flow. Second operand 6 states and 113 transitions. [2024-06-27 21:05:54,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 94 transitions, 757 flow [2024-06-27 21:05:54,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 94 transitions, 751 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-27 21:05:54,231 INFO L231 Difference]: Finished difference. Result has 76 places, 77 transitions, 592 flow [2024-06-27 21:05:54,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=535, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=592, PETRI_PLACES=76, PETRI_TRANSITIONS=77} [2024-06-27 21:05:54,233 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 35 predicate places. [2024-06-27 21:05:54,233 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 77 transitions, 592 flow [2024-06-27 21:05:54,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:54,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:54,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:54,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 21:05:54,234 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:54,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:54,234 INFO L85 PathProgramCache]: Analyzing trace with hash 940248960, now seen corresponding path program 2 times [2024-06-27 21:05:54,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:54,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472343598] [2024-06-27 21:05:54,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:54,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:54,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:55,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:55,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:55,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472343598] [2024-06-27 21:05:55,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472343598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:55,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:55,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:05:55,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744956264] [2024-06-27 21:05:55,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:55,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:05:55,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:55,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:05:55,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:05:55,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 21:05:55,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 77 transitions, 592 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:55,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:55,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 21:05:55,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:55,649 INFO L124 PetriNetUnfolderBase]: 1306/2016 cut-off events. [2024-06-27 21:05:55,649 INFO L125 PetriNetUnfolderBase]: For 9060/9089 co-relation queries the response was YES. [2024-06-27 21:05:55,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8151 conditions, 2016 events. 1306/2016 cut-off events. For 9060/9089 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 9854 event pairs, 399 based on Foata normal form. 9/1980 useless extension candidates. Maximal degree in co-relation 8114. Up to 1822 conditions per place. [2024-06-27 21:05:55,661 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 59 selfloop transitions, 25 changer transitions 0/97 dead transitions. [2024-06-27 21:05:55,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 97 transitions, 828 flow [2024-06-27 21:05:55,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:05:55,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:05:55,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-27 21:05:55,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-27 21:05:55,662 INFO L175 Difference]: Start difference. First operand has 76 places, 77 transitions, 592 flow. Second operand 6 states and 115 transitions. [2024-06-27 21:05:55,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 97 transitions, 828 flow [2024-06-27 21:05:55,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 97 transitions, 789 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 21:05:55,673 INFO L231 Difference]: Finished difference. Result has 78 places, 79 transitions, 633 flow [2024-06-27 21:05:55,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=633, PETRI_PLACES=78, PETRI_TRANSITIONS=79} [2024-06-27 21:05:55,673 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 37 predicate places. [2024-06-27 21:05:55,674 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 79 transitions, 633 flow [2024-06-27 21:05:55,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:55,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:55,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:55,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 21:05:55,674 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:55,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:55,675 INFO L85 PathProgramCache]: Analyzing trace with hash -32009000, now seen corresponding path program 1 times [2024-06-27 21:05:55,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:55,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441642027] [2024-06-27 21:05:55,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:55,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:55,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:56,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:56,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:56,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441642027] [2024-06-27 21:05:56,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441642027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:56,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:56,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:05:56,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556056758] [2024-06-27 21:05:56,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:56,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:05:56,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:56,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:05:56,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:05:56,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:05:56,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 79 transitions, 633 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:56,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:56,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:05:56,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:57,302 INFO L124 PetriNetUnfolderBase]: 1389/2122 cut-off events. [2024-06-27 21:05:57,302 INFO L125 PetriNetUnfolderBase]: For 9818/9822 co-relation queries the response was YES. [2024-06-27 21:05:57,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8806 conditions, 2122 events. 1389/2122 cut-off events. For 9818/9822 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 10093 event pairs, 422 based on Foata normal form. 3/2123 useless extension candidates. Maximal degree in co-relation 8768. Up to 1935 conditions per place. [2024-06-27 21:05:57,314 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 76 selfloop transitions, 27 changer transitions 0/107 dead transitions. [2024-06-27 21:05:57,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 107 transitions, 942 flow [2024-06-27 21:05:57,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:05:57,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:05:57,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 21:05:57,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 21:05:57,315 INFO L175 Difference]: Start difference. First operand has 78 places, 79 transitions, 633 flow. Second operand 7 states and 130 transitions. [2024-06-27 21:05:57,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 107 transitions, 942 flow [2024-06-27 21:05:57,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 107 transitions, 886 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 21:05:57,324 INFO L231 Difference]: Finished difference. Result has 81 places, 82 transitions, 672 flow [2024-06-27 21:05:57,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=577, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=672, PETRI_PLACES=81, PETRI_TRANSITIONS=82} [2024-06-27 21:05:57,325 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 40 predicate places. [2024-06-27 21:05:57,325 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 82 transitions, 672 flow [2024-06-27 21:05:57,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:57,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:57,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:57,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 21:05:57,326 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:57,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:57,326 INFO L85 PathProgramCache]: Analyzing trace with hash -776007516, now seen corresponding path program 2 times [2024-06-27 21:05:57,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:57,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061361013] [2024-06-27 21:05:57,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:57,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:57,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:58,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:58,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:58,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061361013] [2024-06-27 21:05:58,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061361013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:58,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:58,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:05:58,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141673283] [2024-06-27 21:05:58,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:58,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:05:58,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:58,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:05:58,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:05:58,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:05:58,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 82 transitions, 672 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:58,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:58,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:05:58,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:58,986 INFO L124 PetriNetUnfolderBase]: 1395/2139 cut-off events. [2024-06-27 21:05:58,986 INFO L125 PetriNetUnfolderBase]: For 11684/11690 co-relation queries the response was YES. [2024-06-27 21:05:58,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9350 conditions, 2139 events. 1395/2139 cut-off events. For 11684/11690 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10310 event pairs, 415 based on Foata normal form. 8/2146 useless extension candidates. Maximal degree in co-relation 9311. Up to 1968 conditions per place. [2024-06-27 21:05:58,997 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 94 selfloop transitions, 23 changer transitions 0/121 dead transitions. [2024-06-27 21:05:58,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 121 transitions, 1070 flow [2024-06-27 21:05:58,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:05:58,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:05:58,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 21:05:58,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-27 21:05:58,999 INFO L175 Difference]: Start difference. First operand has 81 places, 82 transitions, 672 flow. Second operand 9 states and 161 transitions. [2024-06-27 21:05:58,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 121 transitions, 1070 flow [2024-06-27 21:05:59,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 121 transitions, 1010 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 21:05:59,010 INFO L231 Difference]: Finished difference. Result has 86 places, 89 transitions, 750 flow [2024-06-27 21:05:59,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=750, PETRI_PLACES=86, PETRI_TRANSITIONS=89} [2024-06-27 21:05:59,011 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 45 predicate places. [2024-06-27 21:05:59,011 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 89 transitions, 750 flow [2024-06-27 21:05:59,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:59,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:59,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:59,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 21:05:59,012 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:59,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:59,012 INFO L85 PathProgramCache]: Analyzing trace with hash 758654324, now seen corresponding path program 1 times [2024-06-27 21:05:59,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:59,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463442565] [2024-06-27 21:05:59,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:59,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:59,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:59,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:59,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:59,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463442565] [2024-06-27 21:05:59,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463442565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:59,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:59,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:05:59,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680748941] [2024-06-27 21:05:59,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:59,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:05:59,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:59,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:05:59,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:05:59,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:05:59,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 89 transitions, 750 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:59,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:59,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:05:59,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:00,343 INFO L124 PetriNetUnfolderBase]: 1412/2163 cut-off events. [2024-06-27 21:06:00,343 INFO L125 PetriNetUnfolderBase]: For 14341/14345 co-relation queries the response was YES. [2024-06-27 21:06:00,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9958 conditions, 2163 events. 1412/2163 cut-off events. For 14341/14345 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10359 event pairs, 266 based on Foata normal form. 5/2166 useless extension candidates. Maximal degree in co-relation 9917. Up to 2023 conditions per place. [2024-06-27 21:06:00,369 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 100 selfloop transitions, 14 changer transitions 0/118 dead transitions. [2024-06-27 21:06:00,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 118 transitions, 1087 flow [2024-06-27 21:06:00,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:06:00,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:06:00,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 21:06:00,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-27 21:06:00,371 INFO L175 Difference]: Start difference. First operand has 86 places, 89 transitions, 750 flow. Second operand 7 states and 124 transitions. [2024-06-27 21:06:00,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 118 transitions, 1087 flow [2024-06-27 21:06:00,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 118 transitions, 1019 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 21:06:00,383 INFO L231 Difference]: Finished difference. Result has 89 places, 95 transitions, 781 flow [2024-06-27 21:06:00,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=682, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=781, PETRI_PLACES=89, PETRI_TRANSITIONS=95} [2024-06-27 21:06:00,384 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 48 predicate places. [2024-06-27 21:06:00,384 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 95 transitions, 781 flow [2024-06-27 21:06:00,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:00,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:00,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:00,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 21:06:00,385 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:00,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:00,385 INFO L85 PathProgramCache]: Analyzing trace with hash -992431406, now seen corresponding path program 2 times [2024-06-27 21:06:00,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:00,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086927115] [2024-06-27 21:06:00,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:00,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:00,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:01,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:01,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:01,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086927115] [2024-06-27 21:06:01,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086927115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:01,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:01,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:06:01,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556807013] [2024-06-27 21:06:01,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:01,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:06:01,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:01,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:06:01,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:06:01,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:06:01,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 95 transitions, 781 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:01,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:01,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:06:01,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:01,897 INFO L124 PetriNetUnfolderBase]: 1429/2190 cut-off events. [2024-06-27 21:06:01,897 INFO L125 PetriNetUnfolderBase]: For 16237/16241 co-relation queries the response was YES. [2024-06-27 21:06:01,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10293 conditions, 2190 events. 1429/2190 cut-off events. For 16237/16241 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 10535 event pairs, 376 based on Foata normal form. 5/2193 useless extension candidates. Maximal degree in co-relation 10249. Up to 1942 conditions per place. [2024-06-27 21:06:01,911 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 96 selfloop transitions, 27 changer transitions 0/127 dead transitions. [2024-06-27 21:06:01,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 127 transitions, 1198 flow [2024-06-27 21:06:01,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:06:01,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:06:01,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 21:06:01,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 21:06:01,912 INFO L175 Difference]: Start difference. First operand has 89 places, 95 transitions, 781 flow. Second operand 7 states and 130 transitions. [2024-06-27 21:06:01,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 127 transitions, 1198 flow [2024-06-27 21:06:01,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 127 transitions, 1151 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-27 21:06:01,930 INFO L231 Difference]: Finished difference. Result has 95 places, 101 transitions, 862 flow [2024-06-27 21:06:01,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=862, PETRI_PLACES=95, PETRI_TRANSITIONS=101} [2024-06-27 21:06:01,931 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 54 predicate places. [2024-06-27 21:06:01,931 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 101 transitions, 862 flow [2024-06-27 21:06:01,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:01,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:01,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:01,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 21:06:01,932 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:01,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:01,932 INFO L85 PathProgramCache]: Analyzing trace with hash -917048238, now seen corresponding path program 3 times [2024-06-27 21:06:01,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:01,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977307013] [2024-06-27 21:06:01,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:01,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:01,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:02,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:02,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:02,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977307013] [2024-06-27 21:06:02,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977307013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:02,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:02,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:06:02,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412321081] [2024-06-27 21:06:02,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:02,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:06:02,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:02,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:06:02,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:06:02,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:06:02,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 101 transitions, 862 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:02,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:02,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:06:02,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:03,423 INFO L124 PetriNetUnfolderBase]: 1421/2178 cut-off events. [2024-06-27 21:06:03,424 INFO L125 PetriNetUnfolderBase]: For 18494/18498 co-relation queries the response was YES. [2024-06-27 21:06:03,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10617 conditions, 2178 events. 1421/2178 cut-off events. For 18494/18498 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10488 event pairs, 381 based on Foata normal form. 5/2181 useless extension candidates. Maximal degree in co-relation 10570. Up to 1982 conditions per place. [2024-06-27 21:06:03,436 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 96 selfloop transitions, 26 changer transitions 0/126 dead transitions. [2024-06-27 21:06:03,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 126 transitions, 1196 flow [2024-06-27 21:06:03,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:06:03,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:06:03,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-27 21:06:03,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-27 21:06:03,437 INFO L175 Difference]: Start difference. First operand has 95 places, 101 transitions, 862 flow. Second operand 7 states and 128 transitions. [2024-06-27 21:06:03,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 126 transitions, 1196 flow [2024-06-27 21:06:03,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 126 transitions, 1110 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 21:06:03,459 INFO L231 Difference]: Finished difference. Result has 98 places, 102 transitions, 857 flow [2024-06-27 21:06:03,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=857, PETRI_PLACES=98, PETRI_TRANSITIONS=102} [2024-06-27 21:06:03,459 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 57 predicate places. [2024-06-27 21:06:03,459 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 102 transitions, 857 flow [2024-06-27 21:06:03,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:03,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:03,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:03,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 21:06:03,460 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:03,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:03,461 INFO L85 PathProgramCache]: Analyzing trace with hash -992277584, now seen corresponding path program 1 times [2024-06-27 21:06:03,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:03,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77646074] [2024-06-27 21:06:03,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:03,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:03,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:04,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:04,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:04,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77646074] [2024-06-27 21:06:04,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77646074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:04,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:04,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:06:04,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177846589] [2024-06-27 21:06:04,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:04,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:06:04,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:04,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:06:04,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:06:04,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:06:04,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 102 transitions, 857 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:04,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:04,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:06:04,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:05,300 INFO L124 PetriNetUnfolderBase]: 1479/2286 cut-off events. [2024-06-27 21:06:05,301 INFO L125 PetriNetUnfolderBase]: For 21261/21265 co-relation queries the response was YES. [2024-06-27 21:06:05,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11108 conditions, 2286 events. 1479/2286 cut-off events. For 21261/21265 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 11157 event pairs, 342 based on Foata normal form. 17/2301 useless extension candidates. Maximal degree in co-relation 11060. Up to 1784 conditions per place. [2024-06-27 21:06:05,314 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 97 selfloop transitions, 35 changer transitions 0/136 dead transitions. [2024-06-27 21:06:05,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 136 transitions, 1250 flow [2024-06-27 21:06:05,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:06:05,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:06:05,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 21:06:05,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.471875 [2024-06-27 21:06:05,316 INFO L175 Difference]: Start difference. First operand has 98 places, 102 transitions, 857 flow. Second operand 8 states and 151 transitions. [2024-06-27 21:06:05,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 136 transitions, 1250 flow [2024-06-27 21:06:05,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 136 transitions, 1204 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 21:06:05,336 INFO L231 Difference]: Finished difference. Result has 101 places, 103 transitions, 913 flow [2024-06-27 21:06:05,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=913, PETRI_PLACES=101, PETRI_TRANSITIONS=103} [2024-06-27 21:06:05,337 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 60 predicate places. [2024-06-27 21:06:05,337 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 103 transitions, 913 flow [2024-06-27 21:06:05,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:05,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:05,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:05,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 21:06:05,338 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:05,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:05,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1713579636, now seen corresponding path program 2 times [2024-06-27 21:06:05,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:05,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026320914] [2024-06-27 21:06:05,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:05,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:05,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:06,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:06,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:06,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026320914] [2024-06-27 21:06:06,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026320914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:06,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:06,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:06:06,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041376878] [2024-06-27 21:06:06,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:06,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:06:06,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:06,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:06:06,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:06:06,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:06:06,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 103 transitions, 913 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:06,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:06,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:06:06,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:07,250 INFO L124 PetriNetUnfolderBase]: 1581/2463 cut-off events. [2024-06-27 21:06:07,250 INFO L125 PetriNetUnfolderBase]: For 25087/25093 co-relation queries the response was YES. [2024-06-27 21:06:07,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12294 conditions, 2463 events. 1581/2463 cut-off events. For 25087/25093 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 12399 event pairs, 376 based on Foata normal form. 18/2480 useless extension candidates. Maximal degree in co-relation 12245. Up to 1914 conditions per place. [2024-06-27 21:06:07,265 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 118 selfloop transitions, 26 changer transitions 0/148 dead transitions. [2024-06-27 21:06:07,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 148 transitions, 1445 flow [2024-06-27 21:06:07,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:06:07,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:06:07,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 21:06:07,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46944444444444444 [2024-06-27 21:06:07,267 INFO L175 Difference]: Start difference. First operand has 101 places, 103 transitions, 913 flow. Second operand 9 states and 169 transitions. [2024-06-27 21:06:07,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 148 transitions, 1445 flow [2024-06-27 21:06:07,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 148 transitions, 1385 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 21:06:07,295 INFO L231 Difference]: Finished difference. Result has 104 places, 105 transitions, 945 flow [2024-06-27 21:06:07,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=945, PETRI_PLACES=104, PETRI_TRANSITIONS=105} [2024-06-27 21:06:07,296 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 63 predicate places. [2024-06-27 21:06:07,296 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 105 transitions, 945 flow [2024-06-27 21:06:07,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:07,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:07,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:07,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 21:06:07,297 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:07,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:07,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1713572196, now seen corresponding path program 3 times [2024-06-27 21:06:07,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:07,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334074128] [2024-06-27 21:06:07,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:07,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:07,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:08,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:08,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:08,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334074128] [2024-06-27 21:06:08,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334074128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:08,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:08,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:06:08,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906843779] [2024-06-27 21:06:08,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:08,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:06:08,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:08,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:06:08,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:06:08,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:06:08,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 105 transitions, 945 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:08,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:08,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:06:08,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:09,075 INFO L124 PetriNetUnfolderBase]: 1553/2416 cut-off events. [2024-06-27 21:06:09,076 INFO L125 PetriNetUnfolderBase]: For 26832/26836 co-relation queries the response was YES. [2024-06-27 21:06:09,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12061 conditions, 2416 events. 1553/2416 cut-off events. For 26832/26836 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12110 event pairs, 412 based on Foata normal form. 17/2431 useless extension candidates. Maximal degree in co-relation 12011. Up to 2104 conditions per place. [2024-06-27 21:06:09,087 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 103 selfloop transitions, 34 changer transitions 0/141 dead transitions. [2024-06-27 21:06:09,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 141 transitions, 1340 flow [2024-06-27 21:06:09,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:06:09,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:06:09,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 21:06:09,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2024-06-27 21:06:09,095 INFO L175 Difference]: Start difference. First operand has 104 places, 105 transitions, 945 flow. Second operand 9 states and 164 transitions. [2024-06-27 21:06:09,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 141 transitions, 1340 flow [2024-06-27 21:06:09,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 141 transitions, 1303 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 21:06:09,124 INFO L231 Difference]: Finished difference. Result has 108 places, 105 transitions, 983 flow [2024-06-27 21:06:09,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=908, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=983, PETRI_PLACES=108, PETRI_TRANSITIONS=105} [2024-06-27 21:06:09,125 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 67 predicate places. [2024-06-27 21:06:09,125 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 105 transitions, 983 flow [2024-06-27 21:06:09,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:09,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:09,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:09,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 21:06:09,125 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:09,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:09,126 INFO L85 PathProgramCache]: Analyzing trace with hash -274378308, now seen corresponding path program 1 times [2024-06-27 21:06:09,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:09,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360923345] [2024-06-27 21:06:09,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:09,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:09,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:09,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:09,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:09,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360923345] [2024-06-27 21:06:09,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360923345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:09,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:09,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:06:09,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439888943] [2024-06-27 21:06:09,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:09,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:06:09,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:09,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:06:09,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:06:09,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:06:09,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 105 transitions, 983 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:09,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:09,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:06:09,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:10,234 INFO L124 PetriNetUnfolderBase]: 1573/2448 cut-off events. [2024-06-27 21:06:10,234 INFO L125 PetriNetUnfolderBase]: For 27958/27962 co-relation queries the response was YES. [2024-06-27 21:06:10,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12436 conditions, 2448 events. 1573/2448 cut-off events. For 27958/27962 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12303 event pairs, 422 based on Foata normal form. 5/2451 useless extension candidates. Maximal degree in co-relation 12384. Up to 2335 conditions per place. [2024-06-27 21:06:10,249 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 95 selfloop transitions, 19 changer transitions 0/118 dead transitions. [2024-06-27 21:06:10,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 118 transitions, 1269 flow [2024-06-27 21:06:10,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:06:10,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:06:10,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-27 21:06:10,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-06-27 21:06:10,250 INFO L175 Difference]: Start difference. First operand has 108 places, 105 transitions, 983 flow. Second operand 5 states and 92 transitions. [2024-06-27 21:06:10,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 118 transitions, 1269 flow [2024-06-27 21:06:10,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 118 transitions, 1188 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 21:06:10,286 INFO L231 Difference]: Finished difference. Result has 105 places, 108 transitions, 983 flow [2024-06-27 21:06:10,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=902, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=983, PETRI_PLACES=105, PETRI_TRANSITIONS=108} [2024-06-27 21:06:10,286 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 64 predicate places. [2024-06-27 21:06:10,287 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 108 transitions, 983 flow [2024-06-27 21:06:10,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:10,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:10,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:10,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 21:06:10,288 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:10,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:10,294 INFO L85 PathProgramCache]: Analyzing trace with hash -366709414, now seen corresponding path program 2 times [2024-06-27 21:06:10,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:10,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752144873] [2024-06-27 21:06:10,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:10,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:10,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:10,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:10,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:10,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752144873] [2024-06-27 21:06:10,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752144873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:10,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:10,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:06:10,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717598219] [2024-06-27 21:06:10,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:10,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:06:10,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:10,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:06:10,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:06:10,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:06:10,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 108 transitions, 983 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:10,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:10,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:06:10,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:11,432 INFO L124 PetriNetUnfolderBase]: 1561/2432 cut-off events. [2024-06-27 21:06:11,433 INFO L125 PetriNetUnfolderBase]: For 29484/29488 co-relation queries the response was YES. [2024-06-27 21:06:11,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12523 conditions, 2432 events. 1561/2432 cut-off events. For 29484/29488 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12228 event pairs, 420 based on Foata normal form. 5/2435 useless extension candidates. Maximal degree in co-relation 12470. Up to 2303 conditions per place. [2024-06-27 21:06:11,447 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 98 selfloop transitions, 22 changer transitions 0/124 dead transitions. [2024-06-27 21:06:11,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 124 transitions, 1301 flow [2024-06-27 21:06:11,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:06:11,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:06:11,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-27 21:06:11,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44583333333333336 [2024-06-27 21:06:11,449 INFO L175 Difference]: Start difference. First operand has 105 places, 108 transitions, 983 flow. Second operand 6 states and 107 transitions. [2024-06-27 21:06:11,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 124 transitions, 1301 flow [2024-06-27 21:06:11,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 124 transitions, 1248 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 21:06:11,491 INFO L231 Difference]: Finished difference. Result has 108 places, 111 transitions, 1018 flow [2024-06-27 21:06:11,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=934, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1018, PETRI_PLACES=108, PETRI_TRANSITIONS=111} [2024-06-27 21:06:11,491 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 67 predicate places. [2024-06-27 21:06:11,491 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 111 transitions, 1018 flow [2024-06-27 21:06:11,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:11,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:11,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:11,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 21:06:11,492 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:11,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:11,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1163111206, now seen corresponding path program 1 times [2024-06-27 21:06:11,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:11,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116102882] [2024-06-27 21:06:11,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:11,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:11,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:12,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:12,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:12,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116102882] [2024-06-27 21:06:12,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116102882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:12,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:12,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:06:12,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894048767] [2024-06-27 21:06:12,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:12,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:06:12,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:12,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:06:12,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:06:12,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 21:06:12,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 111 transitions, 1018 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:12,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:12,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 21:06:12,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:12,524 INFO L124 PetriNetUnfolderBase]: 1470/2338 cut-off events. [2024-06-27 21:06:12,524 INFO L125 PetriNetUnfolderBase]: For 30255/30257 co-relation queries the response was YES. [2024-06-27 21:06:12,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12433 conditions, 2338 events. 1470/2338 cut-off events. For 30255/30257 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 11857 event pairs, 402 based on Foata normal form. 3/2335 useless extension candidates. Maximal degree in co-relation 12379. Up to 2172 conditions per place. [2024-06-27 21:06:12,539 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 103 selfloop transitions, 27 changer transitions 0/137 dead transitions. [2024-06-27 21:06:12,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 137 transitions, 1462 flow [2024-06-27 21:06:12,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:06:12,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:06:12,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-27 21:06:12,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46785714285714286 [2024-06-27 21:06:12,541 INFO L175 Difference]: Start difference. First operand has 108 places, 111 transitions, 1018 flow. Second operand 7 states and 131 transitions. [2024-06-27 21:06:12,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 137 transitions, 1462 flow [2024-06-27 21:06:12,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 137 transitions, 1402 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 21:06:12,573 INFO L231 Difference]: Finished difference. Result has 111 places, 117 transitions, 1101 flow [2024-06-27 21:06:12,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=958, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1101, PETRI_PLACES=111, PETRI_TRANSITIONS=117} [2024-06-27 21:06:12,574 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 70 predicate places. [2024-06-27 21:06:12,574 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 117 transitions, 1101 flow [2024-06-27 21:06:12,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:12,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:12,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:12,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 21:06:12,575 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:12,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:12,575 INFO L85 PathProgramCache]: Analyzing trace with hash -98998114, now seen corresponding path program 1 times [2024-06-27 21:06:12,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:12,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338989751] [2024-06-27 21:06:12,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:12,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:12,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:13,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:13,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:13,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338989751] [2024-06-27 21:06:13,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338989751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:13,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:13,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:06:13,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2290580] [2024-06-27 21:06:13,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:13,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:06:13,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:13,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:06:13,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:06:13,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:06:13,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 117 transitions, 1101 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:13,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:13,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:06:13,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:13,495 INFO L124 PetriNetUnfolderBase]: 1607/2497 cut-off events. [2024-06-27 21:06:13,495 INFO L125 PetriNetUnfolderBase]: For 33979/33979 co-relation queries the response was YES. [2024-06-27 21:06:13,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13379 conditions, 2497 events. 1607/2497 cut-off events. For 33979/33979 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12541 event pairs, 407 based on Foata normal form. 2/2498 useless extension candidates. Maximal degree in co-relation 13324. Up to 2410 conditions per place. [2024-06-27 21:06:13,510 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 126 selfloop transitions, 20 changer transitions 0/150 dead transitions. [2024-06-27 21:06:13,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 150 transitions, 1599 flow [2024-06-27 21:06:13,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:06:13,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:06:13,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 21:06:13,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-27 21:06:13,512 INFO L175 Difference]: Start difference. First operand has 111 places, 117 transitions, 1101 flow. Second operand 7 states and 122 transitions. [2024-06-27 21:06:13,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 150 transitions, 1599 flow [2024-06-27 21:06:13,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 150 transitions, 1544 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 21:06:13,550 INFO L231 Difference]: Finished difference. Result has 118 places, 132 transitions, 1245 flow [2024-06-27 21:06:13,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1051, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1245, PETRI_PLACES=118, PETRI_TRANSITIONS=132} [2024-06-27 21:06:13,551 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 77 predicate places. [2024-06-27 21:06:13,551 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 132 transitions, 1245 flow [2024-06-27 21:06:13,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:13,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:13,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:13,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 21:06:13,552 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:13,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:13,552 INFO L85 PathProgramCache]: Analyzing trace with hash -98998300, now seen corresponding path program 2 times [2024-06-27 21:06:13,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:13,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103203995] [2024-06-27 21:06:13,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:13,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:13,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:14,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:14,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:14,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103203995] [2024-06-27 21:06:14,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103203995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:14,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:14,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:06:14,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023745750] [2024-06-27 21:06:14,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:14,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:06:14,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:14,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:06:14,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:06:14,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 21:06:14,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 132 transitions, 1245 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:14,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:14,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 21:06:14,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:14,724 INFO L124 PetriNetUnfolderBase]: 1542/2435 cut-off events. [2024-06-27 21:06:14,725 INFO L125 PetriNetUnfolderBase]: For 37257/37257 co-relation queries the response was YES. [2024-06-27 21:06:14,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13703 conditions, 2435 events. 1542/2435 cut-off events. For 37257/37257 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12303 event pairs, 397 based on Foata normal form. 3/2436 useless extension candidates. Maximal degree in co-relation 13643. Up to 2278 conditions per place. [2024-06-27 21:06:14,741 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 116 selfloop transitions, 27 changer transitions 0/154 dead transitions. [2024-06-27 21:06:14,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 154 transitions, 1668 flow [2024-06-27 21:06:14,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:06:14,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:06:14,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 21:06:14,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 21:06:14,743 INFO L175 Difference]: Start difference. First operand has 118 places, 132 transitions, 1245 flow. Second operand 7 states and 126 transitions. [2024-06-27 21:06:14,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 154 transitions, 1668 flow [2024-06-27 21:06:14,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 154 transitions, 1648 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-27 21:06:14,793 INFO L231 Difference]: Finished difference. Result has 124 places, 138 transitions, 1367 flow [2024-06-27 21:06:14,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1225, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1367, PETRI_PLACES=124, PETRI_TRANSITIONS=138} [2024-06-27 21:06:14,794 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 83 predicate places. [2024-06-27 21:06:14,794 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 138 transitions, 1367 flow [2024-06-27 21:06:14,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:14,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:14,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:14,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 21:06:14,795 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:14,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:14,795 INFO L85 PathProgramCache]: Analyzing trace with hash -366703462, now seen corresponding path program 2 times [2024-06-27 21:06:14,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:14,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116535610] [2024-06-27 21:06:14,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:14,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:14,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:15,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:15,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:15,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116535610] [2024-06-27 21:06:15,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116535610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:15,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:15,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:06:15,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055224641] [2024-06-27 21:06:15,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:15,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:06:15,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:15,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:06:15,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:06:15,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:06:15,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 138 transitions, 1367 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:15,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:15,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:06:15,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:15,764 INFO L124 PetriNetUnfolderBase]: 1642/2550 cut-off events. [2024-06-27 21:06:15,764 INFO L125 PetriNetUnfolderBase]: For 40465/40465 co-relation queries the response was YES. [2024-06-27 21:06:15,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14467 conditions, 2550 events. 1642/2550 cut-off events. For 40465/40465 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12793 event pairs, 406 based on Foata normal form. 2/2551 useless extension candidates. Maximal degree in co-relation 14404. Up to 2485 conditions per place. [2024-06-27 21:06:15,781 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 136 selfloop transitions, 12 changer transitions 0/152 dead transitions. [2024-06-27 21:06:15,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 152 transitions, 1724 flow [2024-06-27 21:06:15,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:06:15,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:06:15,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-27 21:06:15,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42083333333333334 [2024-06-27 21:06:15,783 INFO L175 Difference]: Start difference. First operand has 124 places, 138 transitions, 1367 flow. Second operand 6 states and 101 transitions. [2024-06-27 21:06:15,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 152 transitions, 1724 flow [2024-06-27 21:06:15,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 152 transitions, 1643 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 21:06:15,827 INFO L231 Difference]: Finished difference. Result has 126 places, 141 transitions, 1347 flow [2024-06-27 21:06:15,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1286, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1347, PETRI_PLACES=126, PETRI_TRANSITIONS=141} [2024-06-27 21:06:15,828 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 85 predicate places. [2024-06-27 21:06:15,828 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 141 transitions, 1347 flow [2024-06-27 21:06:15,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:15,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:15,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:15,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 21:06:15,829 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:15,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:15,829 INFO L85 PathProgramCache]: Analyzing trace with hash -366940798, now seen corresponding path program 3 times [2024-06-27 21:06:15,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:15,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310206541] [2024-06-27 21:06:15,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:15,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:15,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:16,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:16,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:16,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310206541] [2024-06-27 21:06:16,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310206541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:16,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:16,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:06:16,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725016338] [2024-06-27 21:06:16,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:16,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:06:16,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:16,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:06:16,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:06:16,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 21:06:16,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 141 transitions, 1347 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:16,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:16,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 21:06:16,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:16,872 INFO L124 PetriNetUnfolderBase]: 1543/2437 cut-off events. [2024-06-27 21:06:16,872 INFO L125 PetriNetUnfolderBase]: For 42417/42417 co-relation queries the response was YES. [2024-06-27 21:06:16,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13903 conditions, 2437 events. 1543/2437 cut-off events. For 42417/42417 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12337 event pairs, 399 based on Foata normal form. 3/2438 useless extension candidates. Maximal degree in co-relation 13839. Up to 2253 conditions per place. [2024-06-27 21:06:16,892 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 118 selfloop transitions, 28 changer transitions 0/158 dead transitions. [2024-06-27 21:06:16,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 158 transitions, 1697 flow [2024-06-27 21:06:16,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:06:16,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:06:16,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-27 21:06:16,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-27 21:06:16,893 INFO L175 Difference]: Start difference. First operand has 126 places, 141 transitions, 1347 flow. Second operand 6 states and 115 transitions. [2024-06-27 21:06:16,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 158 transitions, 1697 flow [2024-06-27 21:06:16,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 158 transitions, 1640 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-27 21:06:16,967 INFO L231 Difference]: Finished difference. Result has 128 places, 141 transitions, 1361 flow [2024-06-27 21:06:16,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1290, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1361, PETRI_PLACES=128, PETRI_TRANSITIONS=141} [2024-06-27 21:06:16,967 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 87 predicate places. [2024-06-27 21:06:16,967 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 141 transitions, 1361 flow [2024-06-27 21:06:16,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:16,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:16,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:16,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 21:06:16,969 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:16,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:16,969 INFO L85 PathProgramCache]: Analyzing trace with hash -366940612, now seen corresponding path program 3 times [2024-06-27 21:06:16,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:16,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495314009] [2024-06-27 21:06:16,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:16,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:16,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:17,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:17,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:17,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495314009] [2024-06-27 21:06:17,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495314009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:17,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:17,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:06:17,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999251613] [2024-06-27 21:06:17,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:17,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:06:17,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:17,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:06:17,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:06:17,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:06:17,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 141 transitions, 1361 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:17,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:17,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:06:17,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:17,981 INFO L124 PetriNetUnfolderBase]: 1627/2530 cut-off events. [2024-06-27 21:06:17,981 INFO L125 PetriNetUnfolderBase]: For 44322/44322 co-relation queries the response was YES. [2024-06-27 21:06:17,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14507 conditions, 2530 events. 1627/2530 cut-off events. For 44322/44322 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 12704 event pairs, 405 based on Foata normal form. 2/2531 useless extension candidates. Maximal degree in co-relation 14443. Up to 2438 conditions per place. [2024-06-27 21:06:17,996 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 130 selfloop transitions, 24 changer transitions 0/158 dead transitions. [2024-06-27 21:06:17,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 158 transitions, 1733 flow [2024-06-27 21:06:17,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:06:17,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:06:17,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-27 21:06:17,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 21:06:17,997 INFO L175 Difference]: Start difference. First operand has 128 places, 141 transitions, 1361 flow. Second operand 6 states and 108 transitions. [2024-06-27 21:06:17,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 158 transitions, 1733 flow [2024-06-27 21:06:18,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 158 transitions, 1656 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 21:06:18,053 INFO L231 Difference]: Finished difference. Result has 130 places, 143 transitions, 1373 flow [2024-06-27 21:06:18,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1286, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1373, PETRI_PLACES=130, PETRI_TRANSITIONS=143} [2024-06-27 21:06:18,054 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 89 predicate places. [2024-06-27 21:06:18,054 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 143 transitions, 1373 flow [2024-06-27 21:06:18,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:18,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:18,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:18,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 21:06:18,055 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:18,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:18,055 INFO L85 PathProgramCache]: Analyzing trace with hash -366694534, now seen corresponding path program 1 times [2024-06-27 21:06:18,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:18,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742317377] [2024-06-27 21:06:18,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:18,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:18,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:18,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:18,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:18,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742317377] [2024-06-27 21:06:18,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742317377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:18,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:18,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:18,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197695091] [2024-06-27 21:06:18,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:18,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:18,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:18,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:18,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:18,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:06:18,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 143 transitions, 1373 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:18,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:18,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:06:18,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:19,341 INFO L124 PetriNetUnfolderBase]: 1622/2521 cut-off events. [2024-06-27 21:06:19,341 INFO L125 PetriNetUnfolderBase]: For 46670/46670 co-relation queries the response was YES. [2024-06-27 21:06:19,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14549 conditions, 2521 events. 1622/2521 cut-off events. For 46670/46670 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12587 event pairs, 405 based on Foata normal form. 2/2522 useless extension candidates. Maximal degree in co-relation 14483. Up to 2455 conditions per place. [2024-06-27 21:06:19,358 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 139 selfloop transitions, 13 changer transitions 0/156 dead transitions. [2024-06-27 21:06:19,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 156 transitions, 1727 flow [2024-06-27 21:06:19,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:06:19,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:06:19,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-27 21:06:19,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42083333333333334 [2024-06-27 21:06:19,359 INFO L175 Difference]: Start difference. First operand has 130 places, 143 transitions, 1373 flow. Second operand 6 states and 101 transitions. [2024-06-27 21:06:19,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 156 transitions, 1727 flow [2024-06-27 21:06:19,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 156 transitions, 1686 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 21:06:19,416 INFO L231 Difference]: Finished difference. Result has 132 places, 145 transitions, 1383 flow [2024-06-27 21:06:19,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1332, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1383, PETRI_PLACES=132, PETRI_TRANSITIONS=145} [2024-06-27 21:06:19,417 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 91 predicate places. [2024-06-27 21:06:19,417 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 145 transitions, 1383 flow [2024-06-27 21:06:19,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:19,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:19,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:19,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 21:06:19,418 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:19,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:19,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1241320983, now seen corresponding path program 1 times [2024-06-27 21:06:19,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:19,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917180873] [2024-06-27 21:06:19,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:19,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:19,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:20,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:20,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:20,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917180873] [2024-06-27 21:06:20,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917180873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:20,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:20,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:06:20,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145668265] [2024-06-27 21:06:20,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:20,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:06:20,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:20,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:06:20,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:06:20,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:06:20,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 145 transitions, 1383 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:20,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:20,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:06:20,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:21,033 INFO L124 PetriNetUnfolderBase]: 1663/2591 cut-off events. [2024-06-27 21:06:21,033 INFO L125 PetriNetUnfolderBase]: For 49280/49284 co-relation queries the response was YES. [2024-06-27 21:06:21,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14915 conditions, 2591 events. 1663/2591 cut-off events. For 49280/49284 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12981 event pairs, 280 based on Foata normal form. 13/2602 useless extension candidates. Maximal degree in co-relation 14849. Up to 2366 conditions per place. [2024-06-27 21:06:21,052 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 157 selfloop transitions, 15 changer transitions 0/176 dead transitions. [2024-06-27 21:06:21,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 176 transitions, 1830 flow [2024-06-27 21:06:21,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:06:21,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:06:21,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 21:06:21,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-27 21:06:21,054 INFO L175 Difference]: Start difference. First operand has 132 places, 145 transitions, 1383 flow. Second operand 8 states and 141 transitions. [2024-06-27 21:06:21,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 176 transitions, 1830 flow [2024-06-27 21:06:21,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 176 transitions, 1793 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 21:06:21,121 INFO L231 Difference]: Finished difference. Result has 136 places, 146 transitions, 1404 flow [2024-06-27 21:06:21,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1348, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1404, PETRI_PLACES=136, PETRI_TRANSITIONS=146} [2024-06-27 21:06:21,122 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 95 predicate places. [2024-06-27 21:06:21,123 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 146 transitions, 1404 flow [2024-06-27 21:06:21,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:21,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:21,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:21,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 21:06:21,123 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:21,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:21,124 INFO L85 PathProgramCache]: Analyzing trace with hash -700601129, now seen corresponding path program 2 times [2024-06-27 21:06:21,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:21,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077187581] [2024-06-27 21:06:21,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:21,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:21,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:22,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:22,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:22,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077187581] [2024-06-27 21:06:22,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077187581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:22,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:22,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:06:22,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224881826] [2024-06-27 21:06:22,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:22,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:06:22,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:22,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:06:22,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:06:22,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:06:22,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 146 transitions, 1404 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:22,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:22,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:06:22,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:22,824 INFO L124 PetriNetUnfolderBase]: 1643/2559 cut-off events. [2024-06-27 21:06:22,824 INFO L125 PetriNetUnfolderBase]: For 50029/50033 co-relation queries the response was YES. [2024-06-27 21:06:22,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14729 conditions, 2559 events. 1643/2559 cut-off events. For 50029/50033 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 12833 event pairs, 378 based on Foata normal form. 13/2570 useless extension candidates. Maximal degree in co-relation 14662. Up to 2232 conditions per place. [2024-06-27 21:06:22,843 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 143 selfloop transitions, 30 changer transitions 0/177 dead transitions. [2024-06-27 21:06:22,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 177 transitions, 1822 flow [2024-06-27 21:06:22,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:06:22,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:06:22,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 21:06:22,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 21:06:22,845 INFO L175 Difference]: Start difference. First operand has 136 places, 146 transitions, 1404 flow. Second operand 8 states and 144 transitions. [2024-06-27 21:06:22,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 177 transitions, 1822 flow [2024-06-27 21:06:22,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 177 transitions, 1784 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 21:06:22,906 INFO L231 Difference]: Finished difference. Result has 137 places, 145 transitions, 1394 flow [2024-06-27 21:06:22,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1330, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1394, PETRI_PLACES=137, PETRI_TRANSITIONS=145} [2024-06-27 21:06:22,906 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 96 predicate places. [2024-06-27 21:06:22,906 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 145 transitions, 1394 flow [2024-06-27 21:06:22,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:22,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:22,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:22,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 21:06:22,907 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:22,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:22,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1222212041, now seen corresponding path program 1 times [2024-06-27 21:06:22,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:22,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357155789] [2024-06-27 21:06:22,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:22,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:22,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:23,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:23,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:23,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357155789] [2024-06-27 21:06:23,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357155789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:23,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:23,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:23,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772824741] [2024-06-27 21:06:23,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:23,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:23,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:23,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:23,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:23,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 21:06:23,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 145 transitions, 1394 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:23,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:23,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 21:06:23,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:24,239 INFO L124 PetriNetUnfolderBase]: 1595/2512 cut-off events. [2024-06-27 21:06:24,239 INFO L125 PetriNetUnfolderBase]: For 52085/52085 co-relation queries the response was YES. [2024-06-27 21:06:24,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14682 conditions, 2512 events. 1595/2512 cut-off events. For 52085/52085 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12695 event pairs, 390 based on Foata normal form. 3/2513 useless extension candidates. Maximal degree in co-relation 14614. Up to 2210 conditions per place. [2024-06-27 21:06:24,258 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 114 selfloop transitions, 50 changer transitions 0/178 dead transitions. [2024-06-27 21:06:24,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 178 transitions, 1962 flow [2024-06-27 21:06:24,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:06:24,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:06:24,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 21:06:24,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2024-06-27 21:06:24,260 INFO L175 Difference]: Start difference. First operand has 137 places, 145 transitions, 1394 flow. Second operand 9 states and 164 transitions. [2024-06-27 21:06:24,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 178 transitions, 1962 flow [2024-06-27 21:06:24,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 178 transitions, 1868 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 21:06:24,342 INFO L231 Difference]: Finished difference. Result has 139 places, 153 transitions, 1534 flow [2024-06-27 21:06:24,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1300, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1534, PETRI_PLACES=139, PETRI_TRANSITIONS=153} [2024-06-27 21:06:24,343 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 98 predicate places. [2024-06-27 21:06:24,343 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 153 transitions, 1534 flow [2024-06-27 21:06:24,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:24,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:24,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:24,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 21:06:24,344 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:24,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:24,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1696710498, now seen corresponding path program 1 times [2024-06-27 21:06:24,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:24,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821561128] [2024-06-27 21:06:24,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:24,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:24,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:25,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:25,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:25,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821561128] [2024-06-27 21:06:25,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821561128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:25,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:25,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:25,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889233341] [2024-06-27 21:06:25,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:25,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:25,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:25,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:25,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:25,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:06:25,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 153 transitions, 1534 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:25,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:25,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:06:25,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:25,503 INFO L124 PetriNetUnfolderBase]: 1684/2617 cut-off events. [2024-06-27 21:06:25,504 INFO L125 PetriNetUnfolderBase]: For 57474/57474 co-relation queries the response was YES. [2024-06-27 21:06:25,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15815 conditions, 2617 events. 1684/2617 cut-off events. For 57474/57474 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13117 event pairs, 396 based on Foata normal form. 2/2618 useless extension candidates. Maximal degree in co-relation 15747. Up to 2480 conditions per place. [2024-06-27 21:06:25,525 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 151 selfloop transitions, 35 changer transitions 0/190 dead transitions. [2024-06-27 21:06:25,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 190 transitions, 2167 flow [2024-06-27 21:06:25,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:06:25,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:06:25,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 21:06:25,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 21:06:25,527 INFO L175 Difference]: Start difference. First operand has 139 places, 153 transitions, 1534 flow. Second operand 8 states and 140 transitions. [2024-06-27 21:06:25,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 190 transitions, 2167 flow [2024-06-27 21:06:25,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 190 transitions, 2055 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 21:06:25,608 INFO L231 Difference]: Finished difference. Result has 144 places, 166 transitions, 1664 flow [2024-06-27 21:06:25,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1431, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1664, PETRI_PLACES=144, PETRI_TRANSITIONS=166} [2024-06-27 21:06:25,609 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 103 predicate places. [2024-06-27 21:06:25,609 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 166 transitions, 1664 flow [2024-06-27 21:06:25,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:25,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:25,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:25,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 21:06:25,610 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:25,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:25,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1700435148, now seen corresponding path program 2 times [2024-06-27 21:06:25,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:25,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046395919] [2024-06-27 21:06:25,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:25,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:25,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:26,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:26,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:26,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046395919] [2024-06-27 21:06:26,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046395919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:26,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:26,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:26,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530866588] [2024-06-27 21:06:26,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:26,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:26,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:26,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:26,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:26,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:06:26,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 166 transitions, 1664 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:26,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:26,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:06:26,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:26,918 INFO L124 PetriNetUnfolderBase]: 1710/2655 cut-off events. [2024-06-27 21:06:26,918 INFO L125 PetriNetUnfolderBase]: For 62639/62639 co-relation queries the response was YES. [2024-06-27 21:06:26,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16503 conditions, 2655 events. 1710/2655 cut-off events. For 62639/62639 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 13347 event pairs, 398 based on Foata normal form. 2/2656 useless extension candidates. Maximal degree in co-relation 16431. Up to 2543 conditions per place. [2024-06-27 21:06:26,940 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 159 selfloop transitions, 33 changer transitions 0/196 dead transitions. [2024-06-27 21:06:26,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 196 transitions, 2255 flow [2024-06-27 21:06:26,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:06:26,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:06:26,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-27 21:06:26,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.405 [2024-06-27 21:06:26,942 INFO L175 Difference]: Start difference. First operand has 144 places, 166 transitions, 1664 flow. Second operand 10 states and 162 transitions. [2024-06-27 21:06:26,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 196 transitions, 2255 flow [2024-06-27 21:06:27,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 196 transitions, 2181 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-27 21:06:27,034 INFO L231 Difference]: Finished difference. Result has 152 places, 174 transitions, 1761 flow [2024-06-27 21:06:27,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1606, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1761, PETRI_PLACES=152, PETRI_TRANSITIONS=174} [2024-06-27 21:06:27,034 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 111 predicate places. [2024-06-27 21:06:27,035 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 174 transitions, 1761 flow [2024-06-27 21:06:27,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:27,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:27,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:27,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 21:06:27,035 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)] === [2024-06-27 21:06:27,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:27,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1226021321, now seen corresponding path program 2 times [2024-06-27 21:06:27,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:27,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489644582] [2024-06-27 21:06:27,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:27,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:27,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:27,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:27,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:27,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489644582] [2024-06-27 21:06:27,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489644582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:27,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:27,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:27,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462367028] [2024-06-27 21:06:27,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:27,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:27,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:27,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:27,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:27,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 21:06:27,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 174 transitions, 1761 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:27,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:27,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 21:06:27,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:28,356 INFO L124 PetriNetUnfolderBase]: 1660/2598 cut-off events. [2024-06-27 21:06:28,356 INFO L125 PetriNetUnfolderBase]: For 66412/66412 co-relation queries the response was YES. [2024-06-27 21:06:28,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16311 conditions, 2598 events. 1660/2598 cut-off events. For 66412/66412 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13108 event pairs, 393 based on Foata normal form. 3/2599 useless extension candidates. Maximal degree in co-relation 16236. Up to 2390 conditions per place. [2024-06-27 21:06:28,377 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 141 selfloop transitions, 34 changer transitions 0/195 dead transitions. [2024-06-27 21:06:28,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 195 transitions, 2243 flow [2024-06-27 21:06:28,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:06:28,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:06:28,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 21:06:28,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 21:06:28,380 INFO L175 Difference]: Start difference. First operand has 152 places, 174 transitions, 1761 flow. Second operand 8 states and 140 transitions. [2024-06-27 21:06:28,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 195 transitions, 2243 flow [2024-06-27 21:06:28,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 195 transitions, 2206 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 21:06:28,477 INFO L231 Difference]: Finished difference. Result has 156 places, 178 transitions, 1864 flow [2024-06-27 21:06:28,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1724, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1864, PETRI_PLACES=156, PETRI_TRANSITIONS=178} [2024-06-27 21:06:28,478 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 115 predicate places. [2024-06-27 21:06:28,478 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 178 transitions, 1864 flow [2024-06-27 21:06:28,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:28,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:28,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:28,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 21:06:28,479 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:28,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:28,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1226021476, now seen corresponding path program 3 times [2024-06-27 21:06:28,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:28,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526592581] [2024-06-27 21:06:28,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:28,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:28,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:29,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:29,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:29,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526592581] [2024-06-27 21:06:29,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526592581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:29,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:29,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:29,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159194988] [2024-06-27 21:06:29,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:29,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:29,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:29,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:29,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:29,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:06:29,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 178 transitions, 1864 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:29,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:29,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:06:29,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:29,698 INFO L124 PetriNetUnfolderBase]: 1719/2668 cut-off events. [2024-06-27 21:06:29,699 INFO L125 PetriNetUnfolderBase]: For 69514/69514 co-relation queries the response was YES. [2024-06-27 21:06:29,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16975 conditions, 2668 events. 1719/2668 cut-off events. For 69514/69514 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 13423 event pairs, 397 based on Foata normal form. 2/2669 useless extension candidates. Maximal degree in co-relation 16898. Up to 2559 conditions per place. [2024-06-27 21:06:29,719 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 161 selfloop transitions, 32 changer transitions 0/197 dead transitions. [2024-06-27 21:06:29,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 197 transitions, 2308 flow [2024-06-27 21:06:29,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:06:29,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:06:29,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 21:06:29,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-27 21:06:29,720 INFO L175 Difference]: Start difference. First operand has 156 places, 178 transitions, 1864 flow. Second operand 8 states and 137 transitions. [2024-06-27 21:06:29,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 197 transitions, 2308 flow [2024-06-27 21:06:29,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 197 transitions, 2200 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 21:06:29,833 INFO L231 Difference]: Finished difference. Result has 158 places, 178 transitions, 1826 flow [2024-06-27 21:06:29,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1756, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1826, PETRI_PLACES=158, PETRI_TRANSITIONS=178} [2024-06-27 21:06:29,834 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 117 predicate places. [2024-06-27 21:06:29,834 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 178 transitions, 1826 flow [2024-06-27 21:06:29,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:29,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:29,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:29,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 21:06:29,835 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:29,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:29,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1399461127, now seen corresponding path program 1 times [2024-06-27 21:06:29,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:29,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759458994] [2024-06-27 21:06:29,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:29,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:29,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:30,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:30,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:30,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759458994] [2024-06-27 21:06:30,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759458994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:30,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:30,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:30,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615868154] [2024-06-27 21:06:30,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:30,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:30,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:30,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:30,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:30,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:06:30,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 178 transitions, 1826 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:30,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:30,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:06:30,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:31,042 INFO L124 PetriNetUnfolderBase]: 1716/2662 cut-off events. [2024-06-27 21:06:31,043 INFO L125 PetriNetUnfolderBase]: For 72913/72913 co-relation queries the response was YES. [2024-06-27 21:06:31,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16973 conditions, 2662 events. 1716/2662 cut-off events. For 72913/72913 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13440 event pairs, 401 based on Foata normal form. 1/2662 useless extension candidates. Maximal degree in co-relation 16895. Up to 2593 conditions per place. [2024-06-27 21:06:31,060 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 171 selfloop transitions, 17 changer transitions 0/192 dead transitions. [2024-06-27 21:06:31,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 192 transitions, 2266 flow [2024-06-27 21:06:31,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:06:31,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:06:31,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-27 21:06:31,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42083333333333334 [2024-06-27 21:06:31,061 INFO L175 Difference]: Start difference. First operand has 158 places, 178 transitions, 1826 flow. Second operand 6 states and 101 transitions. [2024-06-27 21:06:31,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 192 transitions, 2266 flow [2024-06-27 21:06:31,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 192 transitions, 2202 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 21:06:31,159 INFO L231 Difference]: Finished difference. Result has 157 places, 181 transitions, 1842 flow [2024-06-27 21:06:31,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1762, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1842, PETRI_PLACES=157, PETRI_TRANSITIONS=181} [2024-06-27 21:06:31,160 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 116 predicate places. [2024-06-27 21:06:31,160 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 181 transitions, 1842 flow [2024-06-27 21:06:31,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:31,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:31,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:31,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 21:06:31,161 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:31,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:31,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1399251660, now seen corresponding path program 4 times [2024-06-27 21:06:31,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:31,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138545560] [2024-06-27 21:06:31,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:31,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:31,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:31,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:31,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:31,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138545560] [2024-06-27 21:06:31,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138545560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:31,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:31,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:31,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043318944] [2024-06-27 21:06:31,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:31,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:31,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:31,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:31,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:31,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:06:31,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 181 transitions, 1842 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:31,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:31,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:06:31,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:32,327 INFO L124 PetriNetUnfolderBase]: 1742/2700 cut-off events. [2024-06-27 21:06:32,328 INFO L125 PetriNetUnfolderBase]: For 78298/78298 co-relation queries the response was YES. [2024-06-27 21:06:32,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17555 conditions, 2700 events. 1742/2700 cut-off events. For 78298/78298 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 13608 event pairs, 401 based on Foata normal form. 2/2701 useless extension candidates. Maximal degree in co-relation 17476. Up to 2577 conditions per place. [2024-06-27 21:06:32,351 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 174 selfloop transitions, 29 changer transitions 0/207 dead transitions. [2024-06-27 21:06:32,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 207 transitions, 2508 flow [2024-06-27 21:06:32,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:06:32,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:06:32,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 21:06:32,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 21:06:32,352 INFO L175 Difference]: Start difference. First operand has 157 places, 181 transitions, 1842 flow. Second operand 7 states and 125 transitions. [2024-06-27 21:06:32,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 207 transitions, 2508 flow [2024-06-27 21:06:32,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 207 transitions, 2473 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 21:06:32,457 INFO L231 Difference]: Finished difference. Result has 162 places, 188 transitions, 1964 flow [2024-06-27 21:06:32,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1807, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1964, PETRI_PLACES=162, PETRI_TRANSITIONS=188} [2024-06-27 21:06:32,458 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 121 predicate places. [2024-06-27 21:06:32,458 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 188 transitions, 1964 flow [2024-06-27 21:06:32,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:32,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:32,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:32,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 21:06:32,459 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:32,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:32,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1509738630, now seen corresponding path program 5 times [2024-06-27 21:06:32,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:32,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894982170] [2024-06-27 21:06:32,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:32,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:32,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:33,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:33,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:33,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894982170] [2024-06-27 21:06:33,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894982170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:33,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:33,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:33,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772767202] [2024-06-27 21:06:33,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:33,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:33,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:33,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:33,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:33,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:06:33,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 188 transitions, 1964 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:33,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:33,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:06:33,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:33,658 INFO L124 PetriNetUnfolderBase]: 1736/2692 cut-off events. [2024-06-27 21:06:33,658 INFO L125 PetriNetUnfolderBase]: For 81868/81868 co-relation queries the response was YES. [2024-06-27 21:06:33,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17692 conditions, 2692 events. 1736/2692 cut-off events. For 81868/81868 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 13601 event pairs, 397 based on Foata normal form. 2/2693 useless extension candidates. Maximal degree in co-relation 17610. Up to 2572 conditions per place. [2024-06-27 21:06:33,680 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 174 selfloop transitions, 31 changer transitions 0/209 dead transitions. [2024-06-27 21:06:33,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 209 transitions, 2502 flow [2024-06-27 21:06:33,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:06:33,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:06:33,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 21:06:33,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45357142857142857 [2024-06-27 21:06:33,682 INFO L175 Difference]: Start difference. First operand has 162 places, 188 transitions, 1964 flow. Second operand 7 states and 127 transitions. [2024-06-27 21:06:33,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 209 transitions, 2502 flow [2024-06-27 21:06:33,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 209 transitions, 2437 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-27 21:06:33,808 INFO L231 Difference]: Finished difference. Result has 166 places, 188 transitions, 1967 flow [2024-06-27 21:06:33,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1899, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1967, PETRI_PLACES=166, PETRI_TRANSITIONS=188} [2024-06-27 21:06:33,808 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2024-06-27 21:06:33,808 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 188 transitions, 1967 flow [2024-06-27 21:06:33,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:33,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:33,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:33,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 21:06:33,809 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:33,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:33,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1509738475, now seen corresponding path program 3 times [2024-06-27 21:06:33,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:33,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064195502] [2024-06-27 21:06:33,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:33,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:33,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:34,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:34,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:34,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064195502] [2024-06-27 21:06:34,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064195502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:34,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:34,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:34,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547502026] [2024-06-27 21:06:34,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:34,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:34,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:34,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:34,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:34,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 21:06:34,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 188 transitions, 1967 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:34,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:34,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 21:06:34,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:35,223 INFO L124 PetriNetUnfolderBase]: 1661/2601 cut-off events. [2024-06-27 21:06:35,223 INFO L125 PetriNetUnfolderBase]: For 84254/84254 co-relation queries the response was YES. [2024-06-27 21:06:35,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17024 conditions, 2601 events. 1661/2601 cut-off events. For 84254/84254 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 13200 event pairs, 395 based on Foata normal form. 3/2602 useless extension candidates. Maximal degree in co-relation 16941. Up to 2333 conditions per place. [2024-06-27 21:06:35,245 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 145 selfloop transitions, 41 changer transitions 0/209 dead transitions. [2024-06-27 21:06:35,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 209 transitions, 2415 flow [2024-06-27 21:06:35,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:06:35,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:06:35,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 21:06:35,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-27 21:06:35,247 INFO L175 Difference]: Start difference. First operand has 166 places, 188 transitions, 1967 flow. Second operand 7 states and 133 transitions. [2024-06-27 21:06:35,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 209 transitions, 2415 flow [2024-06-27 21:06:35,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 209 transitions, 2283 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 21:06:35,363 INFO L231 Difference]: Finished difference. Result has 167 places, 188 transitions, 1932 flow [2024-06-27 21:06:35,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1835, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1932, PETRI_PLACES=167, PETRI_TRANSITIONS=188} [2024-06-27 21:06:35,363 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 126 predicate places. [2024-06-27 21:06:35,363 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 188 transitions, 1932 flow [2024-06-27 21:06:35,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:35,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:35,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:35,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 21:06:35,364 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)] === [2024-06-27 21:06:35,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:35,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1517095860, now seen corresponding path program 6 times [2024-06-27 21:06:35,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:35,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049780946] [2024-06-27 21:06:35,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:35,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:35,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:35,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:35,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:35,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049780946] [2024-06-27 21:06:35,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049780946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:35,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:35,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:35,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398602836] [2024-06-27 21:06:35,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:35,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:35,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:35,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:35,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:36,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:06:36,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 188 transitions, 1932 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:36,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:36,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:06:36,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:36,555 INFO L124 PetriNetUnfolderBase]: 1721/2670 cut-off events. [2024-06-27 21:06:36,555 INFO L125 PetriNetUnfolderBase]: For 86677/86677 co-relation queries the response was YES. [2024-06-27 21:06:36,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17559 conditions, 2670 events. 1721/2670 cut-off events. For 86677/86677 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 13406 event pairs, 398 based on Foata normal form. 2/2671 useless extension candidates. Maximal degree in co-relation 17476. Up to 2599 conditions per place. [2024-06-27 21:06:36,578 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 183 selfloop transitions, 15 changer transitions 0/202 dead transitions. [2024-06-27 21:06:36,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 202 transitions, 2377 flow [2024-06-27 21:06:36,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:06:36,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:06:36,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-27 21:06:36,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-27 21:06:36,579 INFO L175 Difference]: Start difference. First operand has 167 places, 188 transitions, 1932 flow. Second operand 7 states and 114 transitions. [2024-06-27 21:06:36,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 202 transitions, 2377 flow [2024-06-27 21:06:36,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 202 transitions, 2271 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 21:06:36,720 INFO L231 Difference]: Finished difference. Result has 168 places, 189 transitions, 1873 flow [2024-06-27 21:06:36,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1828, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1873, PETRI_PLACES=168, PETRI_TRANSITIONS=189} [2024-06-27 21:06:36,721 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 127 predicate places. [2024-06-27 21:06:36,721 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 189 transitions, 1873 flow [2024-06-27 21:06:36,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:36,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:36,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:36,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 21:06:36,722 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:36,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:36,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1662922371, now seen corresponding path program 1 times [2024-06-27 21:06:36,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:36,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452931343] [2024-06-27 21:06:36,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:36,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:36,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:37,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:37,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:37,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452931343] [2024-06-27 21:06:37,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452931343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:37,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:37,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:37,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864895586] [2024-06-27 21:06:37,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:37,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:37,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:37,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:37,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:37,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:06:37,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 189 transitions, 1873 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:37,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:37,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:06:37,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:37,882 INFO L124 PetriNetUnfolderBase]: 1815/2813 cut-off events. [2024-06-27 21:06:37,883 INFO L125 PetriNetUnfolderBase]: For 96457/96463 co-relation queries the response was YES. [2024-06-27 21:06:37,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18583 conditions, 2813 events. 1815/2813 cut-off events. For 96457/96463 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 14214 event pairs, 402 based on Foata normal form. 10/2822 useless extension candidates. Maximal degree in co-relation 18499. Up to 2615 conditions per place. [2024-06-27 21:06:37,903 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 177 selfloop transitions, 46 changer transitions 0/227 dead transitions. [2024-06-27 21:06:37,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 227 transitions, 2705 flow [2024-06-27 21:06:37,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:06:37,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:06:37,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 21:06:37,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-27 21:06:37,907 INFO L175 Difference]: Start difference. First operand has 168 places, 189 transitions, 1873 flow. Second operand 8 states and 141 transitions. [2024-06-27 21:06:37,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 227 transitions, 2705 flow [2024-06-27 21:06:38,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 227 transitions, 2668 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 21:06:38,085 INFO L231 Difference]: Finished difference. Result has 173 places, 206 transitions, 2224 flow [2024-06-27 21:06:38,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1836, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2224, PETRI_PLACES=173, PETRI_TRANSITIONS=206} [2024-06-27 21:06:38,086 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 132 predicate places. [2024-06-27 21:06:38,086 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 206 transitions, 2224 flow [2024-06-27 21:06:38,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:38,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:38,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:38,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 21:06:38,087 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:38,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:38,087 INFO L85 PathProgramCache]: Analyzing trace with hash -2129583495, now seen corresponding path program 2 times [2024-06-27 21:06:38,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:38,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009967171] [2024-06-27 21:06:38,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:38,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:38,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:38,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:38,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:38,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009967171] [2024-06-27 21:06:38,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009967171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:38,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:38,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:38,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911093946] [2024-06-27 21:06:38,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:38,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:38,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:38,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:38,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:38,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:06:38,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 206 transitions, 2224 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:38,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:38,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:06:38,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:39,275 INFO L124 PetriNetUnfolderBase]: 1835/2843 cut-off events. [2024-06-27 21:06:39,275 INFO L125 PetriNetUnfolderBase]: For 104228/104234 co-relation queries the response was YES. [2024-06-27 21:06:39,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19706 conditions, 2843 events. 1835/2843 cut-off events. For 104228/104234 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 14397 event pairs, 424 based on Foata normal form. 10/2852 useless extension candidates. Maximal degree in co-relation 19619. Up to 2730 conditions per place. [2024-06-27 21:06:39,304 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 194 selfloop transitions, 22 changer transitions 0/220 dead transitions. [2024-06-27 21:06:39,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 220 transitions, 2755 flow [2024-06-27 21:06:39,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:06:39,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:06:39,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-27 21:06:39,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-27 21:06:39,306 INFO L175 Difference]: Start difference. First operand has 173 places, 206 transitions, 2224 flow. Second operand 6 states and 104 transitions. [2024-06-27 21:06:39,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 220 transitions, 2755 flow [2024-06-27 21:06:39,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 220 transitions, 2694 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-27 21:06:39,601 INFO L231 Difference]: Finished difference. Result has 177 places, 209 transitions, 2278 flow [2024-06-27 21:06:39,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2163, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2278, PETRI_PLACES=177, PETRI_TRANSITIONS=209} [2024-06-27 21:06:39,602 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 136 predicate places. [2024-06-27 21:06:39,602 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 209 transitions, 2278 flow [2024-06-27 21:06:39,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:39,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:39,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:39,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 21:06:39,608 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:39,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:39,608 INFO L85 PathProgramCache]: Analyzing trace with hash -193722271, now seen corresponding path program 3 times [2024-06-27 21:06:39,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:39,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62873545] [2024-06-27 21:06:39,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:39,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:39,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:40,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:40,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:40,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62873545] [2024-06-27 21:06:40,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62873545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:40,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:40,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:40,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619501298] [2024-06-27 21:06:40,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:40,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:40,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:40,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:40,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:40,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:06:40,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 209 transitions, 2278 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:40,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:40,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:06:40,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:40,769 INFO L124 PetriNetUnfolderBase]: 1823/2825 cut-off events. [2024-06-27 21:06:40,770 INFO L125 PetriNetUnfolderBase]: For 106261/106267 co-relation queries the response was YES. [2024-06-27 21:06:40,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19565 conditions, 2825 events. 1823/2825 cut-off events. For 106261/106267 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 14315 event pairs, 400 based on Foata normal form. 10/2834 useless extension candidates. Maximal degree in co-relation 19476. Up to 2623 conditions per place. [2024-06-27 21:06:40,794 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 174 selfloop transitions, 49 changer transitions 0/227 dead transitions. [2024-06-27 21:06:40,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 227 transitions, 2810 flow [2024-06-27 21:06:40,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:06:40,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:06:40,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 21:06:40,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 21:06:40,796 INFO L175 Difference]: Start difference. First operand has 177 places, 209 transitions, 2278 flow. Second operand 7 states and 125 transitions. [2024-06-27 21:06:40,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 227 transitions, 2810 flow [2024-06-27 21:06:41,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 227 transitions, 2726 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-27 21:06:41,027 INFO L231 Difference]: Finished difference. Result has 181 places, 210 transitions, 2349 flow [2024-06-27 21:06:41,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2194, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2349, PETRI_PLACES=181, PETRI_TRANSITIONS=210} [2024-06-27 21:06:41,028 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2024-06-27 21:06:41,028 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 210 transitions, 2349 flow [2024-06-27 21:06:41,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:41,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:41,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:41,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 21:06:41,028 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:41,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:41,030 INFO L85 PathProgramCache]: Analyzing trace with hash -2129574567, now seen corresponding path program 1 times [2024-06-27 21:06:41,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:41,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937929223] [2024-06-27 21:06:41,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:41,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:41,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:42,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:42,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:42,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937929223] [2024-06-27 21:06:42,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937929223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:42,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:42,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:06:42,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123220841] [2024-06-27 21:06:42,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:42,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:06:42,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:42,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:06:42,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:06:42,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:06:42,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 210 transitions, 2349 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:42,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:42,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:06:42,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:42,823 INFO L124 PetriNetUnfolderBase]: 1867/2890 cut-off events. [2024-06-27 21:06:42,823 INFO L125 PetriNetUnfolderBase]: For 117483/117487 co-relation queries the response was YES. [2024-06-27 21:06:42,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20185 conditions, 2890 events. 1867/2890 cut-off events. For 117483/117487 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 14665 event pairs, 440 based on Foata normal form. 13/2901 useless extension candidates. Maximal degree in co-relation 20094. Up to 2708 conditions per place. [2024-06-27 21:06:42,849 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 199 selfloop transitions, 25 changer transitions 0/228 dead transitions. [2024-06-27 21:06:42,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 228 transitions, 2917 flow [2024-06-27 21:06:42,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:06:42,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:06:42,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-27 21:06:42,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45416666666666666 [2024-06-27 21:06:42,851 INFO L175 Difference]: Start difference. First operand has 181 places, 210 transitions, 2349 flow. Second operand 6 states and 109 transitions. [2024-06-27 21:06:42,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 228 transitions, 2917 flow [2024-06-27 21:06:43,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 228 transitions, 2822 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 21:06:43,018 INFO L231 Difference]: Finished difference. Result has 181 places, 211 transitions, 2326 flow [2024-06-27 21:06:43,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2254, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2326, PETRI_PLACES=181, PETRI_TRANSITIONS=211} [2024-06-27 21:06:43,018 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2024-06-27 21:06:43,018 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 211 transitions, 2326 flow [2024-06-27 21:06:43,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:43,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:43,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:43,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 21:06:43,019 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:43,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:43,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1002552289, now seen corresponding path program 4 times [2024-06-27 21:06:43,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:43,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382717897] [2024-06-27 21:06:43,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:43,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:43,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:43,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:43,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:43,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382717897] [2024-06-27 21:06:43,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382717897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:43,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:43,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:43,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234862142] [2024-06-27 21:06:43,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:43,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:43,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:43,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:43,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:43,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:06:43,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 211 transitions, 2326 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:43,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:43,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:06:43,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:44,367 INFO L124 PetriNetUnfolderBase]: 1929/2983 cut-off events. [2024-06-27 21:06:44,368 INFO L125 PetriNetUnfolderBase]: For 111136/111142 co-relation queries the response was YES. [2024-06-27 21:06:44,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20756 conditions, 2983 events. 1929/2983 cut-off events. For 111136/111142 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 15243 event pairs, 422 based on Foata normal form. 10/2992 useless extension candidates. Maximal degree in co-relation 20666. Up to 2765 conditions per place. [2024-06-27 21:06:44,395 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 199 selfloop transitions, 43 changer transitions 0/246 dead transitions. [2024-06-27 21:06:44,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 246 transitions, 3162 flow [2024-06-27 21:06:44,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:06:44,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:06:44,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 21:06:44,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-27 21:06:44,400 INFO L175 Difference]: Start difference. First operand has 181 places, 211 transitions, 2326 flow. Second operand 9 states and 156 transitions. [2024-06-27 21:06:44,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 246 transitions, 3162 flow [2024-06-27 21:06:44,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 246 transitions, 3116 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-27 21:06:44,584 INFO L231 Difference]: Finished difference. Result has 186 places, 220 transitions, 2516 flow [2024-06-27 21:06:44,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2280, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2516, PETRI_PLACES=186, PETRI_TRANSITIONS=220} [2024-06-27 21:06:44,585 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 145 predicate places. [2024-06-27 21:06:44,585 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 220 transitions, 2516 flow [2024-06-27 21:06:44,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:44,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:44,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:44,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 21:06:44,585 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:44,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:44,586 INFO L85 PathProgramCache]: Analyzing trace with hash -648289249, now seen corresponding path program 5 times [2024-06-27 21:06:44,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:44,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589623592] [2024-06-27 21:06:44,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:44,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:44,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:45,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:45,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:45,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589623592] [2024-06-27 21:06:45,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589623592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:45,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:45,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:45,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135528438] [2024-06-27 21:06:45,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:45,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:45,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:45,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:45,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:45,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:06:45,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 220 transitions, 2516 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:45,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:45,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:06:45,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:45,886 INFO L124 PetriNetUnfolderBase]: 1949/3011 cut-off events. [2024-06-27 21:06:45,886 INFO L125 PetriNetUnfolderBase]: For 118737/118743 co-relation queries the response was YES. [2024-06-27 21:06:45,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21449 conditions, 3011 events. 1949/3011 cut-off events. For 118737/118743 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 15372 event pairs, 418 based on Foata normal form. 10/3020 useless extension candidates. Maximal degree in co-relation 21358. Up to 2821 conditions per place. [2024-06-27 21:06:45,913 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 197 selfloop transitions, 41 changer transitions 0/242 dead transitions. [2024-06-27 21:06:45,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 242 transitions, 3154 flow [2024-06-27 21:06:45,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:06:45,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:06:45,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 21:06:45,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-27 21:06:45,915 INFO L175 Difference]: Start difference. First operand has 186 places, 220 transitions, 2516 flow. Second operand 8 states and 137 transitions. [2024-06-27 21:06:45,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 242 transitions, 3154 flow [2024-06-27 21:06:46,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 242 transitions, 2946 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-27 21:06:46,138 INFO L231 Difference]: Finished difference. Result has 188 places, 223 transitions, 2460 flow [2024-06-27 21:06:46,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2324, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2460, PETRI_PLACES=188, PETRI_TRANSITIONS=223} [2024-06-27 21:06:46,139 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 147 predicate places. [2024-06-27 21:06:46,139 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 223 transitions, 2460 flow [2024-06-27 21:06:46,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:46,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:46,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:46,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 21:06:46,140 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:46,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:46,140 INFO L85 PathProgramCache]: Analyzing trace with hash -647873539, now seen corresponding path program 6 times [2024-06-27 21:06:46,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:46,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858158114] [2024-06-27 21:06:46,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:46,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:46,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:46,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:46,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:46,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858158114] [2024-06-27 21:06:46,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858158114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:46,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:46,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:46,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413555234] [2024-06-27 21:06:46,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:46,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:46,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:46,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:46,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:46,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:06:46,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 223 transitions, 2460 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:46,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:46,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:06:46,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:47,316 INFO L124 PetriNetUnfolderBase]: 1993/3078 cut-off events. [2024-06-27 21:06:47,316 INFO L125 PetriNetUnfolderBase]: For 125672/125678 co-relation queries the response was YES. [2024-06-27 21:06:47,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21896 conditions, 3078 events. 1993/3078 cut-off events. For 125672/125678 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 15815 event pairs, 433 based on Foata normal form. 10/3087 useless extension candidates. Maximal degree in co-relation 21806. Up to 2723 conditions per place. [2024-06-27 21:06:47,346 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 179 selfloop transitions, 71 changer transitions 0/254 dead transitions. [2024-06-27 21:06:47,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 254 transitions, 3300 flow [2024-06-27 21:06:47,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:06:47,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:06:47,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 21:06:47,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446875 [2024-06-27 21:06:47,347 INFO L175 Difference]: Start difference. First operand has 188 places, 223 transitions, 2460 flow. Second operand 8 states and 143 transitions. [2024-06-27 21:06:47,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 254 transitions, 3300 flow [2024-06-27 21:06:47,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 254 transitions, 3176 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 21:06:47,628 INFO L231 Difference]: Finished difference. Result has 190 places, 232 transitions, 2655 flow [2024-06-27 21:06:47,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2338, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2655, PETRI_PLACES=190, PETRI_TRANSITIONS=232} [2024-06-27 21:06:47,629 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 149 predicate places. [2024-06-27 21:06:47,629 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 232 transitions, 2655 flow [2024-06-27 21:06:47,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:47,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:47,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:47,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 21:06:47,630 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:47,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:47,630 INFO L85 PathProgramCache]: Analyzing trace with hash 426706179, now seen corresponding path program 7 times [2024-06-27 21:06:47,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:47,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543418244] [2024-06-27 21:06:47,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:47,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:47,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:48,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:48,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:48,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543418244] [2024-06-27 21:06:48,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543418244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:48,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:48,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:48,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140787635] [2024-06-27 21:06:48,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:48,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:48,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:48,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:48,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:48,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:06:48,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 232 transitions, 2655 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:48,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:48,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:06:48,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:48,953 INFO L124 PetriNetUnfolderBase]: 1981/3064 cut-off events. [2024-06-27 21:06:48,954 INFO L125 PetriNetUnfolderBase]: For 126051/126057 co-relation queries the response was YES. [2024-06-27 21:06:48,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22277 conditions, 3064 events. 1981/3064 cut-off events. For 126051/126057 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 15760 event pairs, 432 based on Foata normal form. 10/3073 useless extension candidates. Maximal degree in co-relation 22186. Up to 2834 conditions per place. [2024-06-27 21:06:48,983 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 203 selfloop transitions, 45 changer transitions 0/252 dead transitions. [2024-06-27 21:06:48,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 252 transitions, 3253 flow [2024-06-27 21:06:48,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:06:48,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:06:48,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 21:06:48,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 21:06:48,984 INFO L175 Difference]: Start difference. First operand has 190 places, 232 transitions, 2655 flow. Second operand 7 states and 126 transitions. [2024-06-27 21:06:48,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 252 transitions, 3253 flow [2024-06-27 21:06:49,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 252 transitions, 3121 flow, removed 50 selfloop flow, removed 3 redundant places. [2024-06-27 21:06:49,229 INFO L231 Difference]: Finished difference. Result has 194 places, 232 transitions, 2627 flow [2024-06-27 21:06:49,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2523, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2627, PETRI_PLACES=194, PETRI_TRANSITIONS=232} [2024-06-27 21:06:49,229 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 153 predicate places. [2024-06-27 21:06:49,229 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 232 transitions, 2627 flow [2024-06-27 21:06:49,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:49,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:49,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:49,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 21:06:49,230 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:49,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:49,230 INFO L85 PathProgramCache]: Analyzing trace with hash -442576357, now seen corresponding path program 8 times [2024-06-27 21:06:49,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:49,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696220043] [2024-06-27 21:06:49,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:49,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:49,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:49,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:49,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:49,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696220043] [2024-06-27 21:06:49,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696220043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:49,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:49,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:49,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902478352] [2024-06-27 21:06:49,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:49,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:49,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:49,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:49,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:49,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:06:49,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 232 transitions, 2627 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:49,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:49,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:06:49,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:50,440 INFO L124 PetriNetUnfolderBase]: 2001/3094 cut-off events. [2024-06-27 21:06:50,440 INFO L125 PetriNetUnfolderBase]: For 127589/127595 co-relation queries the response was YES. [2024-06-27 21:06:50,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22140 conditions, 3094 events. 2001/3094 cut-off events. For 127589/127595 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 15959 event pairs, 425 based on Foata normal form. 10/3103 useless extension candidates. Maximal degree in co-relation 22046. Up to 2731 conditions per place. [2024-06-27 21:06:50,469 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 176 selfloop transitions, 75 changer transitions 0/255 dead transitions. [2024-06-27 21:06:50,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 255 transitions, 3387 flow [2024-06-27 21:06:50,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:06:50,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:06:50,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-27 21:06:50,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-27 21:06:50,471 INFO L175 Difference]: Start difference. First operand has 194 places, 232 transitions, 2627 flow. Second operand 7 states and 128 transitions. [2024-06-27 21:06:50,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 255 transitions, 3387 flow [2024-06-27 21:06:50,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 255 transitions, 3285 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 21:06:50,680 INFO L231 Difference]: Finished difference. Result has 194 places, 235 transitions, 2753 flow [2024-06-27 21:06:50,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2529, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2753, PETRI_PLACES=194, PETRI_TRANSITIONS=235} [2024-06-27 21:06:50,681 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 153 predicate places. [2024-06-27 21:06:50,681 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 235 transitions, 2753 flow [2024-06-27 21:06:50,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:50,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:50,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:50,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 21:06:50,682 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:50,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:50,682 INFO L85 PathProgramCache]: Analyzing trace with hash -214675207, now seen corresponding path program 9 times [2024-06-27 21:06:50,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:50,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012979206] [2024-06-27 21:06:50,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:50,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:50,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:51,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:51,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:51,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012979206] [2024-06-27 21:06:51,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012979206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:51,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:51,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:51,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477607724] [2024-06-27 21:06:51,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:51,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:51,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:51,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:51,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:51,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:06:51,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 235 transitions, 2753 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:51,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:51,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:06:51,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:51,888 INFO L124 PetriNetUnfolderBase]: 2021/3130 cut-off events. [2024-06-27 21:06:51,888 INFO L125 PetriNetUnfolderBase]: For 124245/124251 co-relation queries the response was YES. [2024-06-27 21:06:51,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22433 conditions, 3130 events. 2021/3130 cut-off events. For 124245/124251 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 16191 event pairs, 458 based on Foata normal form. 10/3139 useless extension candidates. Maximal degree in co-relation 22339. Up to 2956 conditions per place. [2024-06-27 21:06:51,915 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 219 selfloop transitions, 30 changer transitions 0/253 dead transitions. [2024-06-27 21:06:51,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 253 transitions, 3479 flow [2024-06-27 21:06:51,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:06:51,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:06:51,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 21:06:51,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:06:51,917 INFO L175 Difference]: Start difference. First operand has 194 places, 235 transitions, 2753 flow. Second operand 7 states and 120 transitions. [2024-06-27 21:06:51,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 253 transitions, 3479 flow [2024-06-27 21:06:52,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 253 transitions, 3305 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 21:06:52,168 INFO L231 Difference]: Finished difference. Result has 195 places, 238 transitions, 2717 flow [2024-06-27 21:06:52,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2584, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2717, PETRI_PLACES=195, PETRI_TRANSITIONS=238} [2024-06-27 21:06:52,169 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 154 predicate places. [2024-06-27 21:06:52,169 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 238 transitions, 2717 flow [2024-06-27 21:06:52,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:52,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:52,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:52,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 21:06:52,169 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:52,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:52,170 INFO L85 PathProgramCache]: Analyzing trace with hash -608267947, now seen corresponding path program 10 times [2024-06-27 21:06:52,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:52,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111878191] [2024-06-27 21:06:52,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:52,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:52,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:52,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:52,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:52,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111878191] [2024-06-27 21:06:52,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111878191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:52,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:52,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:52,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334135735] [2024-06-27 21:06:52,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:52,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:52,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:52,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:52,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:52,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:06:52,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 238 transitions, 2717 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:52,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:52,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:06:52,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:53,428 INFO L124 PetriNetUnfolderBase]: 2009/3112 cut-off events. [2024-06-27 21:06:53,428 INFO L125 PetriNetUnfolderBase]: For 120485/120491 co-relation queries the response was YES. [2024-06-27 21:06:53,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21785 conditions, 3112 events. 2009/3112 cut-off events. For 120485/120491 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 16120 event pairs, 460 based on Foata normal form. 10/3121 useless extension candidates. Maximal degree in co-relation 21692. Up to 2984 conditions per place. [2024-06-27 21:06:53,460 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 224 selfloop transitions, 22 changer transitions 0/250 dead transitions. [2024-06-27 21:06:53,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 250 transitions, 3259 flow [2024-06-27 21:06:53,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:06:53,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:06:53,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 21:06:53,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-27 21:06:53,461 INFO L175 Difference]: Start difference. First operand has 195 places, 238 transitions, 2717 flow. Second operand 7 states and 116 transitions. [2024-06-27 21:06:53,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 250 transitions, 3259 flow [2024-06-27 21:06:53,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 250 transitions, 3047 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-27 21:06:53,694 INFO L231 Difference]: Finished difference. Result has 196 places, 238 transitions, 2555 flow [2024-06-27 21:06:53,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2505, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2555, PETRI_PLACES=196, PETRI_TRANSITIONS=238} [2024-06-27 21:06:53,694 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 155 predicate places. [2024-06-27 21:06:53,694 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 238 transitions, 2555 flow [2024-06-27 21:06:53,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:53,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:53,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:53,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 21:06:53,695 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:53,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:53,695 INFO L85 PathProgramCache]: Analyzing trace with hash -206570629, now seen corresponding path program 2 times [2024-06-27 21:06:53,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:53,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867178694] [2024-06-27 21:06:53,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:53,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:53,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:54,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:54,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:54,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867178694] [2024-06-27 21:06:54,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867178694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:54,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:54,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:54,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44821012] [2024-06-27 21:06:54,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:54,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:54,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:54,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:54,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:54,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:06:54,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 238 transitions, 2555 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:54,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:54,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:06:54,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:55,232 INFO L124 PetriNetUnfolderBase]: 2053/3179 cut-off events. [2024-06-27 21:06:55,233 INFO L125 PetriNetUnfolderBase]: For 129876/129880 co-relation queries the response was YES. [2024-06-27 21:06:55,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21912 conditions, 3179 events. 2053/3179 cut-off events. For 129876/129880 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 16518 event pairs, 470 based on Foata normal form. 13/3190 useless extension candidates. Maximal degree in co-relation 21820. Up to 2965 conditions per place. [2024-06-27 21:06:55,264 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 228 selfloop transitions, 27 changer transitions 0/259 dead transitions. [2024-06-27 21:06:55,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 259 transitions, 3223 flow [2024-06-27 21:06:55,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:06:55,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:06:55,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 21:06:55,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392857142857143 [2024-06-27 21:06:55,265 INFO L175 Difference]: Start difference. First operand has 196 places, 238 transitions, 2555 flow. Second operand 7 states and 123 transitions. [2024-06-27 21:06:55,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 259 transitions, 3223 flow [2024-06-27 21:06:55,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 259 transitions, 3107 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 21:06:55,576 INFO L231 Difference]: Finished difference. Result has 196 places, 239 transitions, 2514 flow [2024-06-27 21:06:55,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2439, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2514, PETRI_PLACES=196, PETRI_TRANSITIONS=239} [2024-06-27 21:06:55,577 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 155 predicate places. [2024-06-27 21:06:55,578 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 239 transitions, 2514 flow [2024-06-27 21:06:55,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:55,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:55,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:55,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 21:06:55,578 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:55,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:55,579 INFO L85 PathProgramCache]: Analyzing trace with hash -206095399, now seen corresponding path program 3 times [2024-06-27 21:06:55,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:55,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128186144] [2024-06-27 21:06:55,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:55,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:55,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:56,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:56,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:56,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128186144] [2024-06-27 21:06:56,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128186144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:56,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:56,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:56,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561822382] [2024-06-27 21:06:56,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:56,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:56,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:56,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:56,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:56,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:06:56,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 239 transitions, 2514 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:56,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:56,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:06:56,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:56,891 INFO L124 PetriNetUnfolderBase]: 2055/3185 cut-off events. [2024-06-27 21:06:56,892 INFO L125 PetriNetUnfolderBase]: For 128503/128507 co-relation queries the response was YES. [2024-06-27 21:06:56,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21774 conditions, 3185 events. 2055/3185 cut-off events. For 128503/128507 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 16515 event pairs, 460 based on Foata normal form. 9/3192 useless extension candidates. Maximal degree in co-relation 21682. Up to 2881 conditions per place. [2024-06-27 21:06:56,922 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 229 selfloop transitions, 29 changer transitions 0/262 dead transitions. [2024-06-27 21:06:56,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 262 transitions, 3210 flow [2024-06-27 21:06:56,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:06:56,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:06:56,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 21:06:56,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-27 21:06:56,923 INFO L175 Difference]: Start difference. First operand has 196 places, 239 transitions, 2514 flow. Second operand 7 states and 124 transitions. [2024-06-27 21:06:56,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 262 transitions, 3210 flow [2024-06-27 21:06:57,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 262 transitions, 3153 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 21:06:57,224 INFO L231 Difference]: Finished difference. Result has 198 places, 240 transitions, 2537 flow [2024-06-27 21:06:57,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2457, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2537, PETRI_PLACES=198, PETRI_TRANSITIONS=240} [2024-06-27 21:06:57,226 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 157 predicate places. [2024-06-27 21:06:57,226 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 240 transitions, 2537 flow [2024-06-27 21:06:57,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:57,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:57,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:57,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 21:06:57,226 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:57,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:57,227 INFO L85 PathProgramCache]: Analyzing trace with hash -766191487, now seen corresponding path program 1 times [2024-06-27 21:06:57,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:57,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991665045] [2024-06-27 21:06:57,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:57,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:57,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:57,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:57,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:57,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991665045] [2024-06-27 21:06:57,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991665045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:57,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:57,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:06:57,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958525376] [2024-06-27 21:06:57,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:57,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:06:57,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:57,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:06:57,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:06:58,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 21:06:58,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 240 transitions, 2537 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:58,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:58,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 21:06:58,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:58,592 INFO L124 PetriNetUnfolderBase]: 1989/3109 cut-off events. [2024-06-27 21:06:58,593 INFO L125 PetriNetUnfolderBase]: For 130937/130967 co-relation queries the response was YES. [2024-06-27 21:06:58,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21434 conditions, 3109 events. 1989/3109 cut-off events. For 130937/130967 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 16318 event pairs, 373 based on Foata normal form. 4/3095 useless extension candidates. Maximal degree in co-relation 21341. Up to 2735 conditions per place. [2024-06-27 21:06:58,623 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 219 selfloop transitions, 61 changer transitions 0/304 dead transitions. [2024-06-27 21:06:58,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 304 transitions, 3708 flow [2024-06-27 21:06:58,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:06:58,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:06:58,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 21:06:58,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527777777777778 [2024-06-27 21:06:58,625 INFO L175 Difference]: Start difference. First operand has 198 places, 240 transitions, 2537 flow. Second operand 9 states and 163 transitions. [2024-06-27 21:06:58,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 304 transitions, 3708 flow [2024-06-27 21:06:58,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 304 transitions, 3644 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 21:06:58,881 INFO L231 Difference]: Finished difference. Result has 206 places, 273 transitions, 3140 flow [2024-06-27 21:06:58,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2473, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3140, PETRI_PLACES=206, PETRI_TRANSITIONS=273} [2024-06-27 21:06:58,881 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 165 predicate places. [2024-06-27 21:06:58,881 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 273 transitions, 3140 flow [2024-06-27 21:06:58,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:58,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:58,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:58,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 21:06:58,882 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:58,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:58,882 INFO L85 PathProgramCache]: Analyzing trace with hash -766131037, now seen corresponding path program 2 times [2024-06-27 21:06:58,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:58,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090716069] [2024-06-27 21:06:58,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:58,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:58,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:59,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:59,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:59,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090716069] [2024-06-27 21:06:59,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090716069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:59,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:59,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:06:59,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782362243] [2024-06-27 21:06:59,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:59,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:06:59,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:59,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:06:59,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:06:59,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 21:06:59,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 273 transitions, 3140 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:59,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:59,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 21:06:59,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:00,278 INFO L124 PetriNetUnfolderBase]: 2011/3143 cut-off events. [2024-06-27 21:07:00,278 INFO L125 PetriNetUnfolderBase]: For 138189/138219 co-relation queries the response was YES. [2024-06-27 21:07:00,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22239 conditions, 3143 events. 2011/3143 cut-off events. For 138189/138219 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 16557 event pairs, 421 based on Foata normal form. 4/3129 useless extension candidates. Maximal degree in co-relation 22141. Up to 2831 conditions per place. [2024-06-27 21:07:00,309 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 219 selfloop transitions, 61 changer transitions 0/304 dead transitions. [2024-06-27 21:07:00,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 304 transitions, 3871 flow [2024-06-27 21:07:00,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:07:00,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:07:00,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 21:07:00,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4388888888888889 [2024-06-27 21:07:00,319 INFO L175 Difference]: Start difference. First operand has 206 places, 273 transitions, 3140 flow. Second operand 9 states and 158 transitions. [2024-06-27 21:07:00,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 304 transitions, 3871 flow [2024-06-27 21:07:00,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 304 transitions, 3762 flow, removed 49 selfloop flow, removed 2 redundant places. [2024-06-27 21:07:00,645 INFO L231 Difference]: Finished difference. Result has 214 places, 279 transitions, 3260 flow [2024-06-27 21:07:00,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3045, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3260, PETRI_PLACES=214, PETRI_TRANSITIONS=279} [2024-06-27 21:07:00,650 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 173 predicate places. [2024-06-27 21:07:00,650 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 279 transitions, 3260 flow [2024-06-27 21:07:00,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:00,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:00,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:00,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 21:07:00,651 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:00,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:00,651 INFO L85 PathProgramCache]: Analyzing trace with hash -766130913, now seen corresponding path program 1 times [2024-06-27 21:07:00,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:00,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160729957] [2024-06-27 21:07:00,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:00,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:00,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:01,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:01,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:01,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160729957] [2024-06-27 21:07:01,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160729957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:01,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:01,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:01,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685292439] [2024-06-27 21:07:01,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:01,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:01,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:01,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:01,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:01,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:07:01,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 279 transitions, 3260 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:01,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:01,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:07:01,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:02,148 INFO L124 PetriNetUnfolderBase]: 2107/3264 cut-off events. [2024-06-27 21:07:02,148 INFO L125 PetriNetUnfolderBase]: For 141829/141829 co-relation queries the response was YES. [2024-06-27 21:07:02,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23006 conditions, 3264 events. 2107/3264 cut-off events. For 141829/141829 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 17090 event pairs, 415 based on Foata normal form. 2/3265 useless extension candidates. Maximal degree in co-relation 22905. Up to 3004 conditions per place. [2024-06-27 21:07:02,179 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 254 selfloop transitions, 70 changer transitions 0/328 dead transitions. [2024-06-27 21:07:02,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 328 transitions, 4442 flow [2024-06-27 21:07:02,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:07:02,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:07:02,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-27 21:07:02,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325 [2024-06-27 21:07:02,181 INFO L175 Difference]: Start difference. First operand has 214 places, 279 transitions, 3260 flow. Second operand 10 states and 173 transitions. [2024-06-27 21:07:02,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 328 transitions, 4442 flow [2024-06-27 21:07:02,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 328 transitions, 4302 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 21:07:02,485 INFO L231 Difference]: Finished difference. Result has 222 places, 296 transitions, 3573 flow [2024-06-27 21:07:02,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3137, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3573, PETRI_PLACES=222, PETRI_TRANSITIONS=296} [2024-06-27 21:07:02,486 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 181 predicate places. [2024-06-27 21:07:02,486 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 296 transitions, 3573 flow [2024-06-27 21:07:02,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:02,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:02,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:02,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 21:07:02,487 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:02,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:02,487 INFO L85 PathProgramCache]: Analyzing trace with hash -763334527, now seen corresponding path program 3 times [2024-06-27 21:07:02,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:02,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962541645] [2024-06-27 21:07:02,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:02,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:02,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:03,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:03,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:03,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962541645] [2024-06-27 21:07:03,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962541645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:03,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:03,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:03,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983751730] [2024-06-27 21:07:03,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:03,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:03,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:03,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:03,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:03,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 21:07:03,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 296 transitions, 3573 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:03,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:03,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 21:07:03,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:04,149 INFO L124 PetriNetUnfolderBase]: 2090/3252 cut-off events. [2024-06-27 21:07:04,149 INFO L125 PetriNetUnfolderBase]: For 161517/161547 co-relation queries the response was YES. [2024-06-27 21:07:04,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23464 conditions, 3252 events. 2090/3252 cut-off events. For 161517/161547 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 17136 event pairs, 430 based on Foata normal form. 14/3248 useless extension candidates. Maximal degree in co-relation 23359. Up to 2833 conditions per place. [2024-06-27 21:07:04,178 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 212 selfloop transitions, 86 changer transitions 0/326 dead transitions. [2024-06-27 21:07:04,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 326 transitions, 4341 flow [2024-06-27 21:07:04,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:07:04,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:07:04,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 21:07:04,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 21:07:04,179 INFO L175 Difference]: Start difference. First operand has 222 places, 296 transitions, 3573 flow. Second operand 9 states and 162 transitions. [2024-06-27 21:07:04,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 326 transitions, 4341 flow [2024-06-27 21:07:04,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 326 transitions, 4228 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-27 21:07:04,588 INFO L231 Difference]: Finished difference. Result has 227 places, 302 transitions, 3731 flow [2024-06-27 21:07:04,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3460, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3731, PETRI_PLACES=227, PETRI_TRANSITIONS=302} [2024-06-27 21:07:04,589 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 186 predicate places. [2024-06-27 21:07:04,589 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 302 transitions, 3731 flow [2024-06-27 21:07:04,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:04,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:04,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:04,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 21:07:04,589 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:04,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:04,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1058419211, now seen corresponding path program 2 times [2024-06-27 21:07:04,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:04,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067274770] [2024-06-27 21:07:04,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:04,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:04,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:05,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:05,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:05,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067274770] [2024-06-27 21:07:05,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067274770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:05,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:05,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:05,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533854287] [2024-06-27 21:07:05,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:05,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:05,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:05,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:05,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:05,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:07:05,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 302 transitions, 3731 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:05,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:05,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:07:05,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:06,218 INFO L124 PetriNetUnfolderBase]: 2174/3365 cut-off events. [2024-06-27 21:07:06,219 INFO L125 PetriNetUnfolderBase]: For 155579/155579 co-relation queries the response was YES. [2024-06-27 21:07:06,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24459 conditions, 3365 events. 2174/3365 cut-off events. For 155579/155579 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 17741 event pairs, 422 based on Foata normal form. 2/3366 useless extension candidates. Maximal degree in co-relation 24352. Up to 3164 conditions per place. [2024-06-27 21:07:06,252 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 265 selfloop transitions, 60 changer transitions 0/329 dead transitions. [2024-06-27 21:07:06,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 329 transitions, 4594 flow [2024-06-27 21:07:06,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:07:06,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:07:06,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 21:07:06,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-27 21:07:06,254 INFO L175 Difference]: Start difference. First operand has 227 places, 302 transitions, 3731 flow. Second operand 9 states and 155 transitions. [2024-06-27 21:07:06,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 329 transitions, 4594 flow [2024-06-27 21:07:06,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 329 transitions, 4410 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 21:07:06,662 INFO L231 Difference]: Finished difference. Result has 230 places, 305 transitions, 3720 flow [2024-06-27 21:07:06,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3555, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3720, PETRI_PLACES=230, PETRI_TRANSITIONS=305} [2024-06-27 21:07:06,662 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 189 predicate places. [2024-06-27 21:07:06,663 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 305 transitions, 3720 flow [2024-06-27 21:07:06,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:06,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:06,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:06,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 21:07:06,663 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:06,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:06,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1058414561, now seen corresponding path program 3 times [2024-06-27 21:07:06,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:06,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774795457] [2024-06-27 21:07:06,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:06,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:06,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:07,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:07,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:07,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774795457] [2024-06-27 21:07:07,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774795457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:07,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:07,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:07,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800491598] [2024-06-27 21:07:07,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:07,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:07,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:07,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:07,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:07,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:07:07,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 305 transitions, 3720 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:07,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:07,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:07:07,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:08,248 INFO L124 PetriNetUnfolderBase]: 2184/3379 cut-off events. [2024-06-27 21:07:08,248 INFO L125 PetriNetUnfolderBase]: For 160086/160086 co-relation queries the response was YES. [2024-06-27 21:07:08,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24411 conditions, 3379 events. 2184/3379 cut-off events. For 160086/160086 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 17785 event pairs, 420 based on Foata normal form. 2/3380 useless extension candidates. Maximal degree in co-relation 24303. Up to 3169 conditions per place. [2024-06-27 21:07:08,284 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 266 selfloop transitions, 66 changer transitions 0/336 dead transitions. [2024-06-27 21:07:08,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 336 transitions, 4627 flow [2024-06-27 21:07:08,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:07:08,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:07:08,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-27 21:07:08,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 21:07:08,286 INFO L175 Difference]: Start difference. First operand has 230 places, 305 transitions, 3720 flow. Second operand 10 states and 170 transitions. [2024-06-27 21:07:08,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 336 transitions, 4627 flow [2024-06-27 21:07:08,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 336 transitions, 4489 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 21:07:08,561 INFO L231 Difference]: Finished difference. Result has 234 places, 310 transitions, 3797 flow [2024-06-27 21:07:08,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3582, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3797, PETRI_PLACES=234, PETRI_TRANSITIONS=310} [2024-06-27 21:07:08,562 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 193 predicate places. [2024-06-27 21:07:08,562 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 310 transitions, 3797 flow [2024-06-27 21:07:08,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:08,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:08,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:08,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 21:07:08,563 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:08,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:08,563 INFO L85 PathProgramCache]: Analyzing trace with hash -647858659, now seen corresponding path program 1 times [2024-06-27 21:07:08,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:08,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558932920] [2024-06-27 21:07:08,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:08,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:08,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:09,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:09,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:09,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558932920] [2024-06-27 21:07:09,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558932920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:09,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:09,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:09,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368933953] [2024-06-27 21:07:09,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:09,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:09,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:09,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:09,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:09,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:07:09,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 310 transitions, 3797 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:09,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:09,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:07:09,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:10,173 INFO L124 PetriNetUnfolderBase]: 2192/3391 cut-off events. [2024-06-27 21:07:10,174 INFO L125 PetriNetUnfolderBase]: For 165962/165962 co-relation queries the response was YES. [2024-06-27 21:07:10,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24643 conditions, 3391 events. 2192/3391 cut-off events. For 165962/165962 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 17862 event pairs, 422 based on Foata normal form. 2/3392 useless extension candidates. Maximal degree in co-relation 24533. Up to 3262 conditions per place. [2024-06-27 21:07:10,208 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 300 selfloop transitions, 26 changer transitions 0/330 dead transitions. [2024-06-27 21:07:10,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 330 transitions, 4531 flow [2024-06-27 21:07:10,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:07:10,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:07:10,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 21:07:10,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-27 21:07:10,210 INFO L175 Difference]: Start difference. First operand has 234 places, 310 transitions, 3797 flow. Second operand 8 states and 133 transitions. [2024-06-27 21:07:10,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 330 transitions, 4531 flow [2024-06-27 21:07:10,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 330 transitions, 4432 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 21:07:10,517 INFO L231 Difference]: Finished difference. Result has 236 places, 312 transitions, 3785 flow [2024-06-27 21:07:10,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3698, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3785, PETRI_PLACES=236, PETRI_TRANSITIONS=312} [2024-06-27 21:07:10,518 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 195 predicate places. [2024-06-27 21:07:10,518 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 312 transitions, 3785 flow [2024-06-27 21:07:10,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:10,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:10,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:10,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 21:07:10,519 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:10,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:10,519 INFO L85 PathProgramCache]: Analyzing trace with hash -647865603, now seen corresponding path program 4 times [2024-06-27 21:07:10,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:10,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740657530] [2024-06-27 21:07:10,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:10,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:10,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:11,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:11,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:11,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740657530] [2024-06-27 21:07:11,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740657530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:11,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:11,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:11,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434745770] [2024-06-27 21:07:11,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:11,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:11,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:11,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:11,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:11,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:07:11,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 312 transitions, 3785 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:11,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:11,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:07:11,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:12,185 INFO L124 PetriNetUnfolderBase]: 2202/3405 cut-off events. [2024-06-27 21:07:12,185 INFO L125 PetriNetUnfolderBase]: For 172277/172277 co-relation queries the response was YES. [2024-06-27 21:07:12,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24997 conditions, 3405 events. 2202/3405 cut-off events. For 172277/172277 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 17982 event pairs, 423 based on Foata normal form. 2/3406 useless extension candidates. Maximal degree in co-relation 24885. Up to 3257 conditions per place. [2024-06-27 21:07:12,221 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 298 selfloop transitions, 36 changer transitions 0/338 dead transitions. [2024-06-27 21:07:12,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 338 transitions, 4576 flow [2024-06-27 21:07:12,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:07:12,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:07:12,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 175 transitions. [2024-06-27 21:07:12,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-27 21:07:12,222 INFO L175 Difference]: Start difference. First operand has 236 places, 312 transitions, 3785 flow. Second operand 11 states and 175 transitions. [2024-06-27 21:07:12,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 338 transitions, 4576 flow [2024-06-27 21:07:12,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 338 transitions, 4505 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 21:07:12,683 INFO L231 Difference]: Finished difference. Result has 241 places, 315 transitions, 3843 flow [2024-06-27 21:07:12,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3714, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3843, PETRI_PLACES=241, PETRI_TRANSITIONS=315} [2024-06-27 21:07:12,684 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 200 predicate places. [2024-06-27 21:07:12,684 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 315 transitions, 3843 flow [2024-06-27 21:07:12,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:12,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:12,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:12,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 21:07:12,685 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:12,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:12,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1173705607, now seen corresponding path program 4 times [2024-06-27 21:07:12,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:12,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9289992] [2024-06-27 21:07:12,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:12,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:12,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:13,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:13,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:13,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9289992] [2024-06-27 21:07:13,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9289992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:13,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:13,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:13,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691902825] [2024-06-27 21:07:13,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:13,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:13,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:13,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:13,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:13,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 21:07:13,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 315 transitions, 3843 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:13,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:13,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 21:07:13,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:14,500 INFO L124 PetriNetUnfolderBase]: 2170/3376 cut-off events. [2024-06-27 21:07:14,501 INFO L125 PetriNetUnfolderBase]: For 194347/194377 co-relation queries the response was YES. [2024-06-27 21:07:14,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24919 conditions, 3376 events. 2170/3376 cut-off events. For 194347/194377 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 17974 event pairs, 436 based on Foata normal form. 14/3372 useless extension candidates. Maximal degree in co-relation 24806. Up to 3021 conditions per place. [2024-06-27 21:07:14,537 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 241 selfloop transitions, 66 changer transitions 0/340 dead transitions. [2024-06-27 21:07:14,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 340 transitions, 4614 flow [2024-06-27 21:07:14,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:07:14,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:07:14,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 21:07:14,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4388888888888889 [2024-06-27 21:07:14,539 INFO L175 Difference]: Start difference. First operand has 241 places, 315 transitions, 3843 flow. Second operand 9 states and 158 transitions. [2024-06-27 21:07:14,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 340 transitions, 4614 flow [2024-06-27 21:07:15,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 340 transitions, 4516 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-27 21:07:15,070 INFO L231 Difference]: Finished difference. Result has 241 places, 318 transitions, 3947 flow [2024-06-27 21:07:15,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3745, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3947, PETRI_PLACES=241, PETRI_TRANSITIONS=318} [2024-06-27 21:07:15,070 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 200 predicate places. [2024-06-27 21:07:15,070 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 318 transitions, 3947 flow [2024-06-27 21:07:15,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:15,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:15,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:15,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 21:07:15,071 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:15,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:15,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1173705731, now seen corresponding path program 5 times [2024-06-27 21:07:15,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:15,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496103908] [2024-06-27 21:07:15,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:15,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:15,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:15,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:15,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:15,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496103908] [2024-06-27 21:07:15,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496103908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:15,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:15,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:15,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421687017] [2024-06-27 21:07:15,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:15,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:15,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:15,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:15,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:15,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:07:15,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 318 transitions, 3947 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:15,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:15,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:07:15,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:16,817 INFO L124 PetriNetUnfolderBase]: 2264/3499 cut-off events. [2024-06-27 21:07:16,817 INFO L125 PetriNetUnfolderBase]: For 185993/185993 co-relation queries the response was YES. [2024-06-27 21:07:16,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26045 conditions, 3499 events. 2264/3499 cut-off events. For 185993/185993 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 18550 event pairs, 429 based on Foata normal form. 2/3500 useless extension candidates. Maximal degree in co-relation 25931. Up to 3338 conditions per place. [2024-06-27 21:07:16,852 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 301 selfloop transitions, 41 changer transitions 0/346 dead transitions. [2024-06-27 21:07:16,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 346 transitions, 4791 flow [2024-06-27 21:07:16,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:07:16,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:07:16,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-27 21:07:16,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415 [2024-06-27 21:07:16,853 INFO L175 Difference]: Start difference. First operand has 241 places, 318 transitions, 3947 flow. Second operand 10 states and 166 transitions. [2024-06-27 21:07:16,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 346 transitions, 4791 flow [2024-06-27 21:07:17,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 346 transitions, 4639 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 21:07:17,333 INFO L231 Difference]: Finished difference. Result has 245 places, 323 transitions, 3978 flow [2024-06-27 21:07:17,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3797, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3978, PETRI_PLACES=245, PETRI_TRANSITIONS=323} [2024-06-27 21:07:17,334 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 204 predicate places. [2024-06-27 21:07:17,334 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 323 transitions, 3978 flow [2024-06-27 21:07:17,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:17,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:17,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:17,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 21:07:17,335 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:17,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:17,335 INFO L85 PathProgramCache]: Analyzing trace with hash -206386365, now seen corresponding path program 1 times [2024-06-27 21:07:17,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:17,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376627466] [2024-06-27 21:07:17,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:17,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:17,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:18,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:18,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:18,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376627466] [2024-06-27 21:07:18,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376627466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:18,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:18,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:18,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900290002] [2024-06-27 21:07:18,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:18,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:18,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:18,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:18,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:18,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:07:18,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 323 transitions, 3978 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:18,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:18,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:07:18,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:19,110 INFO L124 PetriNetUnfolderBase]: 2261/3495 cut-off events. [2024-06-27 21:07:19,110 INFO L125 PetriNetUnfolderBase]: For 188426/188426 co-relation queries the response was YES. [2024-06-27 21:07:19,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25941 conditions, 3495 events. 2261/3495 cut-off events. For 188426/188426 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 18580 event pairs, 446 based on Foata normal form. 1/3495 useless extension candidates. Maximal degree in co-relation 25825. Up to 3382 conditions per place. [2024-06-27 21:07:19,143 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 309 selfloop transitions, 23 changer transitions 0/336 dead transitions. [2024-06-27 21:07:19,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 336 transitions, 4686 flow [2024-06-27 21:07:19,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:07:19,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:07:19,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-27 21:07:19,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-27 21:07:19,145 INFO L175 Difference]: Start difference. First operand has 245 places, 323 transitions, 3978 flow. Second operand 7 states and 115 transitions. [2024-06-27 21:07:19,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 336 transitions, 4686 flow [2024-06-27 21:07:19,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 336 transitions, 4590 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 21:07:19,634 INFO L231 Difference]: Finished difference. Result has 246 places, 323 transitions, 3938 flow [2024-06-27 21:07:19,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3882, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3938, PETRI_PLACES=246, PETRI_TRANSITIONS=323} [2024-06-27 21:07:19,634 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 205 predicate places. [2024-06-27 21:07:19,634 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 323 transitions, 3938 flow [2024-06-27 21:07:19,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:19,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:19,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:19,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 21:07:19,635 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:19,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:19,635 INFO L85 PathProgramCache]: Analyzing trace with hash 2133287543, now seen corresponding path program 6 times [2024-06-27 21:07:19,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:19,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692964521] [2024-06-27 21:07:19,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:19,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:19,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:20,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:20,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:20,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692964521] [2024-06-27 21:07:20,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692964521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:20,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:20,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:20,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312784684] [2024-06-27 21:07:20,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:20,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:20,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:20,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:20,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:20,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:07:20,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 323 transitions, 3938 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:20,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:20,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:07:20,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:21,123 INFO L124 PetriNetUnfolderBase]: 2271/3509 cut-off events. [2024-06-27 21:07:21,123 INFO L125 PetriNetUnfolderBase]: For 196035/196035 co-relation queries the response was YES. [2024-06-27 21:07:21,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26162 conditions, 3509 events. 2271/3509 cut-off events. For 196035/196035 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 18654 event pairs, 441 based on Foata normal form. 2/3510 useless extension candidates. Maximal degree in co-relation 26044. Up to 3353 conditions per place. [2024-06-27 21:07:21,165 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 309 selfloop transitions, 35 changer transitions 0/348 dead transitions. [2024-06-27 21:07:21,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 348 transitions, 4757 flow [2024-06-27 21:07:21,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:07:21,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:07:21,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 21:07:21,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 21:07:21,166 INFO L175 Difference]: Start difference. First operand has 246 places, 323 transitions, 3938 flow. Second operand 8 states and 140 transitions. [2024-06-27 21:07:21,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 348 transitions, 4757 flow [2024-06-27 21:07:21,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 348 transitions, 4687 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 21:07:21,694 INFO L231 Difference]: Finished difference. Result has 249 places, 326 transitions, 4007 flow [2024-06-27 21:07:21,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3868, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4007, PETRI_PLACES=249, PETRI_TRANSITIONS=326} [2024-06-27 21:07:21,694 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 208 predicate places. [2024-06-27 21:07:21,695 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 326 transitions, 4007 flow [2024-06-27 21:07:21,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:21,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:21,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:21,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 21:07:21,695 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:21,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:21,696 INFO L85 PathProgramCache]: Analyzing trace with hash -442561477, now seen corresponding path program 2 times [2024-06-27 21:07:21,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:21,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589506152] [2024-06-27 21:07:21,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:21,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:21,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:22,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:22,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:22,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589506152] [2024-06-27 21:07:22,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589506152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:22,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:22,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:22,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026355402] [2024-06-27 21:07:22,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:22,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:22,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:22,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:22,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:22,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:07:22,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 326 transitions, 4007 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:22,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:22,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:07:22,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:23,321 INFO L124 PetriNetUnfolderBase]: 2279/3521 cut-off events. [2024-06-27 21:07:23,322 INFO L125 PetriNetUnfolderBase]: For 202960/202960 co-relation queries the response was YES. [2024-06-27 21:07:23,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26424 conditions, 3521 events. 2279/3521 cut-off events. For 202960/202960 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 18717 event pairs, 431 based on Foata normal form. 2/3522 useless extension candidates. Maximal degree in co-relation 26304. Up to 3386 conditions per place. [2024-06-27 21:07:23,361 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 313 selfloop transitions, 28 changer transitions 0/345 dead transitions. [2024-06-27 21:07:23,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 345 transitions, 4773 flow [2024-06-27 21:07:23,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:07:23,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:07:23,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 21:07:23,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:07:23,363 INFO L175 Difference]: Start difference. First operand has 249 places, 326 transitions, 4007 flow. Second operand 7 states and 120 transitions. [2024-06-27 21:07:23,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 345 transitions, 4773 flow [2024-06-27 21:07:23,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 345 transitions, 4665 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 21:07:23,866 INFO L231 Difference]: Finished difference. Result has 250 places, 328 transitions, 3997 flow [2024-06-27 21:07:23,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3899, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3997, PETRI_PLACES=250, PETRI_TRANSITIONS=328} [2024-06-27 21:07:23,866 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 209 predicate places. [2024-06-27 21:07:23,866 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 328 transitions, 3997 flow [2024-06-27 21:07:23,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:23,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:23,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:23,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 21:07:23,867 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:23,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:23,867 INFO L85 PathProgramCache]: Analyzing trace with hash -442746051, now seen corresponding path program 7 times [2024-06-27 21:07:23,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:23,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903414494] [2024-06-27 21:07:23,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:23,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:23,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:24,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:24,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:24,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903414494] [2024-06-27 21:07:24,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903414494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:24,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:24,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:24,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447624042] [2024-06-27 21:07:24,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:24,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:24,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:24,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:24,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:24,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:07:24,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 328 transitions, 3997 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:24,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:24,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:07:24,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:25,567 INFO L124 PetriNetUnfolderBase]: 2297/3546 cut-off events. [2024-06-27 21:07:25,567 INFO L125 PetriNetUnfolderBase]: For 212033/212033 co-relation queries the response was YES. [2024-06-27 21:07:25,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26893 conditions, 3546 events. 2297/3546 cut-off events. For 212033/212033 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 18853 event pairs, 440 based on Foata normal form. 2/3547 useless extension candidates. Maximal degree in co-relation 26772. Up to 3357 conditions per place. [2024-06-27 21:07:25,606 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 314 selfloop transitions, 45 changer transitions 0/363 dead transitions. [2024-06-27 21:07:25,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 363 transitions, 5055 flow [2024-06-27 21:07:25,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:07:25,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:07:25,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 21:07:25,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 21:07:25,607 INFO L175 Difference]: Start difference. First operand has 250 places, 328 transitions, 3997 flow. Second operand 9 states and 160 transitions. [2024-06-27 21:07:25,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 363 transitions, 5055 flow [2024-06-27 21:07:26,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 363 transitions, 4975 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 21:07:26,137 INFO L231 Difference]: Finished difference. Result has 255 places, 335 transitions, 4174 flow [2024-06-27 21:07:26,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3919, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4174, PETRI_PLACES=255, PETRI_TRANSITIONS=335} [2024-06-27 21:07:26,138 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 214 predicate places. [2024-06-27 21:07:26,138 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 335 transitions, 4174 flow [2024-06-27 21:07:26,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:26,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:26,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:26,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 21:07:26,138 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:26,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:26,139 INFO L85 PathProgramCache]: Analyzing trace with hash -442746175, now seen corresponding path program 5 times [2024-06-27 21:07:26,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:26,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947554045] [2024-06-27 21:07:26,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:26,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:26,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:27,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:27,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:27,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947554045] [2024-06-27 21:07:27,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947554045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:27,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:27,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:27,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078907826] [2024-06-27 21:07:27,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:27,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:27,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:27,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:27,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:27,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 21:07:27,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 335 transitions, 4174 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:27,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:27,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 21:07:27,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:27,969 INFO L124 PetriNetUnfolderBase]: 2234/3474 cut-off events. [2024-06-27 21:07:27,969 INFO L125 PetriNetUnfolderBase]: For 223474/223504 co-relation queries the response was YES. [2024-06-27 21:07:27,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26113 conditions, 3474 events. 2234/3474 cut-off events. For 223474/223504 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 18593 event pairs, 401 based on Foata normal form. 14/3470 useless extension candidates. Maximal degree in co-relation 25990. Up to 2894 conditions per place. [2024-06-27 21:07:28,009 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 257 selfloop transitions, 71 changer transitions 0/367 dead transitions. [2024-06-27 21:07:28,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 367 transitions, 4984 flow [2024-06-27 21:07:28,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:07:28,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:07:28,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 21:07:28,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.484375 [2024-06-27 21:07:28,011 INFO L175 Difference]: Start difference. First operand has 255 places, 335 transitions, 4174 flow. Second operand 8 states and 155 transitions. [2024-06-27 21:07:28,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 367 transitions, 4984 flow [2024-06-27 21:07:28,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 367 transitions, 4867 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-27 21:07:28,646 INFO L231 Difference]: Finished difference. Result has 258 places, 336 transitions, 4243 flow [2024-06-27 21:07:28,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4057, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4243, PETRI_PLACES=258, PETRI_TRANSITIONS=336} [2024-06-27 21:07:28,646 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 217 predicate places. [2024-06-27 21:07:28,647 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 336 transitions, 4243 flow [2024-06-27 21:07:28,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:28,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:28,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:28,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 21:07:28,647 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:28,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:28,648 INFO L85 PathProgramCache]: Analyzing trace with hash -442568421, now seen corresponding path program 8 times [2024-06-27 21:07:28,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:28,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603999237] [2024-06-27 21:07:28,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:28,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:28,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:29,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:29,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:29,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603999237] [2024-06-27 21:07:29,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603999237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:29,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:29,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:29,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763928470] [2024-06-27 21:07:29,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:29,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:29,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:29,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:29,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:29,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:07:29,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 336 transitions, 4243 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:29,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:29,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:07:29,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:30,247 INFO L124 PetriNetUnfolderBase]: 2333/3602 cut-off events. [2024-06-27 21:07:30,248 INFO L125 PetriNetUnfolderBase]: For 213016/213016 co-relation queries the response was YES. [2024-06-27 21:07:30,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27349 conditions, 3602 events. 2333/3602 cut-off events. For 213016/213016 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 19241 event pairs, 442 based on Foata normal form. 2/3603 useless extension candidates. Maximal degree in co-relation 27224. Up to 3446 conditions per place. [2024-06-27 21:07:30,287 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 321 selfloop transitions, 33 changer transitions 0/358 dead transitions. [2024-06-27 21:07:30,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 358 transitions, 5085 flow [2024-06-27 21:07:30,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:07:30,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:07:30,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 21:07:30,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-27 21:07:30,288 INFO L175 Difference]: Start difference. First operand has 258 places, 336 transitions, 4243 flow. Second operand 8 states and 137 transitions. [2024-06-27 21:07:30,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 358 transitions, 5085 flow [2024-06-27 21:07:30,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 358 transitions, 4939 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 21:07:30,862 INFO L231 Difference]: Finished difference. Result has 260 places, 339 transitions, 4243 flow [2024-06-27 21:07:30,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4097, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4243, PETRI_PLACES=260, PETRI_TRANSITIONS=339} [2024-06-27 21:07:30,862 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 219 predicate places. [2024-06-27 21:07:30,862 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 339 transitions, 4243 flow [2024-06-27 21:07:30,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:30,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:30,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:30,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 21:07:30,863 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:30,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:30,863 INFO L85 PathProgramCache]: Analyzing trace with hash -206386117, now seen corresponding path program 3 times [2024-06-27 21:07:30,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:30,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678181971] [2024-06-27 21:07:30,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:30,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:30,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:31,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:31,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:31,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678181971] [2024-06-27 21:07:31,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678181971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:31,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:31,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:31,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440680488] [2024-06-27 21:07:31,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:31,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:31,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:31,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:31,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:31,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:07:31,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 339 transitions, 4243 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:31,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:31,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:07:31,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:32,462 INFO L124 PetriNetUnfolderBase]: 2341/3614 cut-off events. [2024-06-27 21:07:32,463 INFO L125 PetriNetUnfolderBase]: For 218445/218445 co-relation queries the response was YES. [2024-06-27 21:07:32,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27320 conditions, 3614 events. 2341/3614 cut-off events. For 218445/218445 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 19246 event pairs, 456 based on Foata normal form. 2/3615 useless extension candidates. Maximal degree in co-relation 27194. Up to 3504 conditions per place. [2024-06-27 21:07:32,498 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 331 selfloop transitions, 19 changer transitions 0/354 dead transitions. [2024-06-27 21:07:32,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 354 transitions, 5013 flow [2024-06-27 21:07:32,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:07:32,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:07:32,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-27 21:07:32,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-27 21:07:32,500 INFO L175 Difference]: Start difference. First operand has 260 places, 339 transitions, 4243 flow. Second operand 7 states and 114 transitions. [2024-06-27 21:07:32,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 354 transitions, 5013 flow [2024-06-27 21:07:33,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 354 transitions, 4907 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 21:07:33,130 INFO L231 Difference]: Finished difference. Result has 261 places, 341 transitions, 4215 flow [2024-06-27 21:07:33,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4137, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4215, PETRI_PLACES=261, PETRI_TRANSITIONS=341} [2024-06-27 21:07:33,131 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 220 predicate places. [2024-06-27 21:07:33,131 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 341 transitions, 4215 flow [2024-06-27 21:07:33,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:33,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:33,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:33,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 21:07:33,132 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:33,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:33,132 INFO L85 PathProgramCache]: Analyzing trace with hash -206089447, now seen corresponding path program 4 times [2024-06-27 21:07:33,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:33,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815389142] [2024-06-27 21:07:33,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:33,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:33,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:33,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:33,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:33,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815389142] [2024-06-27 21:07:33,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815389142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:33,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:33,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:33,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469542114] [2024-06-27 21:07:33,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:33,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:33,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:33,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:33,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:33,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:07:33,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 341 transitions, 4215 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:33,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:33,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:07:33,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:34,771 INFO L124 PetriNetUnfolderBase]: 2336/3607 cut-off events. [2024-06-27 21:07:34,771 INFO L125 PetriNetUnfolderBase]: For 221839/221839 co-relation queries the response was YES. [2024-06-27 21:07:34,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27283 conditions, 3607 events. 2336/3607 cut-off events. For 221839/221839 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 19210 event pairs, 449 based on Foata normal form. 2/3608 useless extension candidates. Maximal degree in co-relation 27156. Up to 3500 conditions per place. [2024-06-27 21:07:34,813 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 337 selfloop transitions, 15 changer transitions 0/356 dead transitions. [2024-06-27 21:07:34,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 356 transitions, 4989 flow [2024-06-27 21:07:34,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:07:34,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:07:34,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-27 21:07:34,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-27 21:07:34,815 INFO L175 Difference]: Start difference. First operand has 261 places, 341 transitions, 4215 flow. Second operand 7 states and 113 transitions. [2024-06-27 21:07:34,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 356 transitions, 4989 flow [2024-06-27 21:07:35,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 356 transitions, 4929 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 21:07:35,444 INFO L231 Difference]: Finished difference. Result has 263 places, 343 transitions, 4228 flow [2024-06-27 21:07:35,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4155, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4228, PETRI_PLACES=263, PETRI_TRANSITIONS=343} [2024-06-27 21:07:35,444 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 222 predicate places. [2024-06-27 21:07:35,445 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 343 transitions, 4228 flow [2024-06-27 21:07:35,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:35,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:35,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:35,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 21:07:35,445 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:35,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:35,446 INFO L85 PathProgramCache]: Analyzing trace with hash -214667271, now seen corresponding path program 9 times [2024-06-27 21:07:35,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:35,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266798540] [2024-06-27 21:07:35,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:35,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:35,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:36,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:36,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:36,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266798540] [2024-06-27 21:07:36,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266798540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:36,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:36,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:36,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317959250] [2024-06-27 21:07:36,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:36,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:36,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:36,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:36,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:36,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:07:36,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 343 transitions, 4228 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:36,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:36,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:07:36,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:37,141 INFO L124 PetriNetUnfolderBase]: 2330/3599 cut-off events. [2024-06-27 21:07:37,141 INFO L125 PetriNetUnfolderBase]: For 225548/225548 co-relation queries the response was YES. [2024-06-27 21:07:37,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27262 conditions, 3599 events. 2330/3599 cut-off events. For 225548/225548 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 19186 event pairs, 452 based on Foata normal form. 2/3600 useless extension candidates. Maximal degree in co-relation 27134. Up to 3487 conditions per place. [2024-06-27 21:07:37,184 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 337 selfloop transitions, 18 changer transitions 0/359 dead transitions. [2024-06-27 21:07:37,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 359 transitions, 5010 flow [2024-06-27 21:07:37,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:07:37,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:07:37,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 21:07:37,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 21:07:37,186 INFO L175 Difference]: Start difference. First operand has 263 places, 343 transitions, 4228 flow. Second operand 8 states and 128 transitions. [2024-06-27 21:07:37,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 359 transitions, 5010 flow [2024-06-27 21:07:37,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 359 transitions, 4905 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-27 21:07:37,878 INFO L231 Difference]: Finished difference. Result has 266 places, 344 transitions, 4187 flow [2024-06-27 21:07:37,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4133, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4187, PETRI_PLACES=266, PETRI_TRANSITIONS=344} [2024-06-27 21:07:37,878 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 225 predicate places. [2024-06-27 21:07:37,878 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 344 transitions, 4187 flow [2024-06-27 21:07:37,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:37,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:37,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:37,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 21:07:37,879 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:37,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:37,879 INFO L85 PathProgramCache]: Analyzing trace with hash -158898737, now seen corresponding path program 1 times [2024-06-27 21:07:37,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:37,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160226092] [2024-06-27 21:07:37,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:37,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:37,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:38,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:38,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:38,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160226092] [2024-06-27 21:07:38,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160226092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:38,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:38,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:38,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197607882] [2024-06-27 21:07:38,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:38,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:38,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:38,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:38,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:38,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:07:38,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 344 transitions, 4187 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:38,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:38,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:07:38,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:39,582 INFO L124 PetriNetUnfolderBase]: 2335/3605 cut-off events. [2024-06-27 21:07:39,582 INFO L125 PetriNetUnfolderBase]: For 231165/231169 co-relation queries the response was YES. [2024-06-27 21:07:39,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27320 conditions, 3605 events. 2335/3605 cut-off events. For 231165/231169 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 19249 event pairs, 475 based on Foata normal form. 2/3605 useless extension candidates. Maximal degree in co-relation 27191. Up to 3260 conditions per place. [2024-06-27 21:07:39,624 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 271 selfloop transitions, 93 changer transitions 0/368 dead transitions. [2024-06-27 21:07:39,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 368 transitions, 5210 flow [2024-06-27 21:07:39,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:07:39,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:07:39,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-27 21:07:39,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607142857142857 [2024-06-27 21:07:39,625 INFO L175 Difference]: Start difference. First operand has 266 places, 344 transitions, 4187 flow. Second operand 7 states and 129 transitions. [2024-06-27 21:07:39,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 368 transitions, 5210 flow [2024-06-27 21:07:40,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 368 transitions, 5170 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 21:07:40,258 INFO L231 Difference]: Finished difference. Result has 268 places, 350 transitions, 4479 flow [2024-06-27 21:07:40,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4147, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4479, PETRI_PLACES=268, PETRI_TRANSITIONS=350} [2024-06-27 21:07:40,258 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 227 predicate places. [2024-06-27 21:07:40,258 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 350 transitions, 4479 flow [2024-06-27 21:07:40,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:40,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:40,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:40,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 21:07:40,259 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:40,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:40,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1450322309, now seen corresponding path program 2 times [2024-06-27 21:07:40,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:40,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989514962] [2024-06-27 21:07:40,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:40,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:41,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:41,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:41,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989514962] [2024-06-27 21:07:41,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989514962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:41,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:41,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:07:41,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721107854] [2024-06-27 21:07:41,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:41,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:07:41,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:41,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:07:41,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:07:41,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:07:41,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 350 transitions, 4479 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:41,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:41,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:07:41,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:42,259 INFO L124 PetriNetUnfolderBase]: 2345/3618 cut-off events. [2024-06-27 21:07:42,259 INFO L125 PetriNetUnfolderBase]: For 240783/240783 co-relation queries the response was YES. [2024-06-27 21:07:42,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27986 conditions, 3618 events. 2345/3618 cut-off events. For 240783/240783 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 19338 event pairs, 447 based on Foata normal form. 1/3618 useless extension candidates. Maximal degree in co-relation 27856. Up to 3369 conditions per place. [2024-06-27 21:07:42,297 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 297 selfloop transitions, 73 changer transitions 0/374 dead transitions. [2024-06-27 21:07:42,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 374 transitions, 5399 flow [2024-06-27 21:07:42,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:07:42,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:07:42,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 21:07:42,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 21:07:42,298 INFO L175 Difference]: Start difference. First operand has 268 places, 350 transitions, 4479 flow. Second operand 8 states and 136 transitions. [2024-06-27 21:07:42,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 374 transitions, 5399 flow [2024-06-27 21:07:43,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 374 transitions, 5278 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 21:07:43,029 INFO L231 Difference]: Finished difference. Result has 273 places, 358 transitions, 4648 flow [2024-06-27 21:07:43,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4364, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4648, PETRI_PLACES=273, PETRI_TRANSITIONS=358} [2024-06-27 21:07:43,030 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 232 predicate places. [2024-06-27 21:07:43,030 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 358 transitions, 4648 flow [2024-06-27 21:07:43,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:43,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:43,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:43,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 21:07:43,031 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:43,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:43,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1509751413, now seen corresponding path program 1 times [2024-06-27 21:07:43,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:43,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740996466] [2024-06-27 21:07:43,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:43,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:43,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:43,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:43,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:43,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740996466] [2024-06-27 21:07:43,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740996466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:43,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:43,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:43,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304169412] [2024-06-27 21:07:43,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:43,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:43,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:43,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:43,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:43,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:07:43,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 358 transitions, 4648 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:43,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:43,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:07:43,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:44,821 INFO L124 PetriNetUnfolderBase]: 2379/3670 cut-off events. [2024-06-27 21:07:44,821 INFO L125 PetriNetUnfolderBase]: For 249060/249064 co-relation queries the response was YES. [2024-06-27 21:07:44,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28746 conditions, 3670 events. 2379/3670 cut-off events. For 249060/249064 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 19564 event pairs, 437 based on Foata normal form. 3/3671 useless extension candidates. Maximal degree in co-relation 28614. Up to 3363 conditions per place. [2024-06-27 21:07:44,864 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 305 selfloop transitions, 77 changer transitions 0/386 dead transitions. [2024-06-27 21:07:44,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 386 transitions, 5784 flow [2024-06-27 21:07:44,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:07:44,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:07:44,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 21:07:44,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 21:07:44,866 INFO L175 Difference]: Start difference. First operand has 273 places, 358 transitions, 4648 flow. Second operand 8 states and 144 transitions. [2024-06-27 21:07:44,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 386 transitions, 5784 flow [2024-06-27 21:07:45,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 386 transitions, 5606 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 21:07:45,660 INFO L231 Difference]: Finished difference. Result has 276 places, 364 transitions, 4771 flow [2024-06-27 21:07:45,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4472, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4771, PETRI_PLACES=276, PETRI_TRANSITIONS=364} [2024-06-27 21:07:45,660 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 235 predicate places. [2024-06-27 21:07:45,661 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 364 transitions, 4771 flow [2024-06-27 21:07:45,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:45,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:45,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:45,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 21:07:45,661 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:45,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:45,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1182386507, now seen corresponding path program 2 times [2024-06-27 21:07:45,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:45,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576382776] [2024-06-27 21:07:45,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:45,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:45,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:46,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:46,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:46,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576382776] [2024-06-27 21:07:46,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576382776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:46,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:46,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:07:46,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682351038] [2024-06-27 21:07:46,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:46,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:07:46,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:46,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:07:46,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:07:46,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:07:46,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 364 transitions, 4771 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:46,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:46,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:07:46,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:47,433 INFO L124 PetriNetUnfolderBase]: 2389/3679 cut-off events. [2024-06-27 21:07:47,433 INFO L125 PetriNetUnfolderBase]: For 252297/252299 co-relation queries the response was YES. [2024-06-27 21:07:47,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29220 conditions, 3679 events. 2389/3679 cut-off events. For 252297/252299 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 19645 event pairs, 446 based on Foata normal form. 4/3682 useless extension candidates. Maximal degree in co-relation 29088. Up to 3517 conditions per place. [2024-06-27 21:07:47,477 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 346 selfloop transitions, 32 changer transitions 0/382 dead transitions. [2024-06-27 21:07:47,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 382 transitions, 5691 flow [2024-06-27 21:07:47,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:07:47,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:07:47,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 21:07:47,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-27 21:07:47,478 INFO L175 Difference]: Start difference. First operand has 276 places, 364 transitions, 4771 flow. Second operand 7 states and 118 transitions. [2024-06-27 21:07:47,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 382 transitions, 5691 flow [2024-06-27 21:07:48,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 382 transitions, 5598 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-27 21:07:48,231 INFO L231 Difference]: Finished difference. Result has 280 places, 370 transitions, 4873 flow [2024-06-27 21:07:48,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4680, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4873, PETRI_PLACES=280, PETRI_TRANSITIONS=370} [2024-06-27 21:07:48,232 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 239 predicate places. [2024-06-27 21:07:48,232 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 370 transitions, 4873 flow [2024-06-27 21:07:48,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:48,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:48,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:48,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 21:07:48,232 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:48,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:48,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1777693911, now seen corresponding path program 3 times [2024-06-27 21:07:48,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:48,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752062459] [2024-06-27 21:07:48,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:48,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:48,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:49,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:49,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:49,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752062459] [2024-06-27 21:07:49,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752062459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:49,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:49,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:07:49,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53391139] [2024-06-27 21:07:49,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:49,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:07:49,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:49,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:07:49,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:07:49,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:07:49,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 370 transitions, 4873 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:49,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:49,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:07:49,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:49,976 INFO L124 PetriNetUnfolderBase]: 2396/3698 cut-off events. [2024-06-27 21:07:49,977 INFO L125 PetriNetUnfolderBase]: For 257463/257467 co-relation queries the response was YES. [2024-06-27 21:07:50,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29613 conditions, 3698 events. 2396/3698 cut-off events. For 257463/257467 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 19751 event pairs, 436 based on Foata normal form. 3/3699 useless extension candidates. Maximal degree in co-relation 29478. Up to 3445 conditions per place. [2024-06-27 21:07:50,022 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 322 selfloop transitions, 76 changer transitions 0/402 dead transitions. [2024-06-27 21:07:50,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 402 transitions, 5987 flow [2024-06-27 21:07:50,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:07:50,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:07:50,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 21:07:50,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-06-27 21:07:50,023 INFO L175 Difference]: Start difference. First operand has 280 places, 370 transitions, 4873 flow. Second operand 8 states and 142 transitions. [2024-06-27 21:07:50,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 402 transitions, 5987 flow [2024-06-27 21:07:50,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 402 transitions, 5902 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 21:07:50,919 INFO L231 Difference]: Finished difference. Result has 285 places, 386 transitions, 5295 flow [2024-06-27 21:07:50,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4792, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5295, PETRI_PLACES=285, PETRI_TRANSITIONS=386} [2024-06-27 21:07:50,920 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 244 predicate places. [2024-06-27 21:07:50,920 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 386 transitions, 5295 flow [2024-06-27 21:07:50,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:50,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:50,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:50,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 21:07:50,921 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:50,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:50,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1011694065, now seen corresponding path program 3 times [2024-06-27 21:07:50,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:50,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352170883] [2024-06-27 21:07:50,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:50,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:50,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:51,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:51,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:51,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352170883] [2024-06-27 21:07:51,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352170883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:51,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:51,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:07:51,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820235459] [2024-06-27 21:07:51,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:51,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:07:51,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:51,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:07:51,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:07:51,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:07:51,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 386 transitions, 5295 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:51,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:51,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:07:51,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:52,799 INFO L124 PetriNetUnfolderBase]: 2461/3791 cut-off events. [2024-06-27 21:07:52,799 INFO L125 PetriNetUnfolderBase]: For 259293/259293 co-relation queries the response was YES. [2024-06-27 21:07:52,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30671 conditions, 3791 events. 2461/3791 cut-off events. For 259293/259293 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 20145 event pairs, 465 based on Foata normal form. 2/3792 useless extension candidates. Maximal degree in co-relation 30534. Up to 3521 conditions per place. [2024-06-27 21:07:52,842 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 368 selfloop transitions, 61 changer transitions 0/433 dead transitions. [2024-06-27 21:07:52,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 433 transitions, 6652 flow [2024-06-27 21:07:52,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:07:52,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:07:52,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 21:07:52,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 21:07:52,844 INFO L175 Difference]: Start difference. First operand has 285 places, 386 transitions, 5295 flow. Second operand 7 states and 125 transitions. [2024-06-27 21:07:52,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 433 transitions, 6652 flow [2024-06-27 21:07:53,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 433 transitions, 6514 flow, removed 53 selfloop flow, removed 3 redundant places. [2024-06-27 21:07:53,682 INFO L231 Difference]: Finished difference. Result has 292 places, 415 transitions, 5829 flow [2024-06-27 21:07:53,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5163, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5829, PETRI_PLACES=292, PETRI_TRANSITIONS=415} [2024-06-27 21:07:53,683 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 251 predicate places. [2024-06-27 21:07:53,683 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 415 transitions, 5829 flow [2024-06-27 21:07:53,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:53,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:53,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:53,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 21:07:53,684 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:53,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:53,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1883796145, now seen corresponding path program 1 times [2024-06-27 21:07:53,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:53,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387080985] [2024-06-27 21:07:53,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:53,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:53,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:54,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:54,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:54,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387080985] [2024-06-27 21:07:54,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387080985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:54,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:54,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:54,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853168595] [2024-06-27 21:07:54,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:54,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:54,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:54,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:54,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:54,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:07:54,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 415 transitions, 5829 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:54,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:54,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:07:54,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:55,311 INFO L124 PetriNetUnfolderBase]: 2576/3957 cut-off events. [2024-06-27 21:07:55,311 INFO L125 PetriNetUnfolderBase]: For 281339/281341 co-relation queries the response was YES. [2024-06-27 21:07:55,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32892 conditions, 3957 events. 2576/3957 cut-off events. For 281339/281341 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 21070 event pairs, 436 based on Foata normal form. 6/3962 useless extension candidates. Maximal degree in co-relation 32750. Up to 3542 conditions per place. [2024-06-27 21:07:55,360 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 360 selfloop transitions, 107 changer transitions 0/471 dead transitions. [2024-06-27 21:07:55,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 471 transitions, 7551 flow [2024-06-27 21:07:55,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:07:55,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:07:55,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 21:07:55,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 21:07:55,362 INFO L175 Difference]: Start difference. First operand has 292 places, 415 transitions, 5829 flow. Second operand 9 states and 162 transitions. [2024-06-27 21:07:55,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 471 transitions, 7551 flow [2024-06-27 21:07:56,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 471 transitions, 7416 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-27 21:07:56,442 INFO L231 Difference]: Finished difference. Result has 300 places, 440 transitions, 6494 flow [2024-06-27 21:07:56,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5698, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6494, PETRI_PLACES=300, PETRI_TRANSITIONS=440} [2024-06-27 21:07:56,443 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 259 predicate places. [2024-06-27 21:07:56,443 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 440 transitions, 6494 flow [2024-06-27 21:07:56,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:56,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:56,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:56,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 21:07:56,443 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:56,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:56,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1883651995, now seen corresponding path program 2 times [2024-06-27 21:07:56,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:56,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246082949] [2024-06-27 21:07:56,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:56,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:56,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:57,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:57,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:57,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246082949] [2024-06-27 21:07:57,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246082949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:57,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:57,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:57,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277839408] [2024-06-27 21:07:57,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:57,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:57,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:57,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:57,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:57,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:07:57,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 440 transitions, 6494 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:57,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:57,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:07:57,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:58,214 INFO L124 PetriNetUnfolderBase]: 2628/4029 cut-off events. [2024-06-27 21:07:58,214 INFO L125 PetriNetUnfolderBase]: For 302617/302619 co-relation queries the response was YES. [2024-06-27 21:07:58,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34625 conditions, 4029 events. 2628/4029 cut-off events. For 302617/302619 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 21450 event pairs, 442 based on Foata normal form. 6/4034 useless extension candidates. Maximal degree in co-relation 34479. Up to 3726 conditions per place. [2024-06-27 21:07:58,265 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 389 selfloop transitions, 78 changer transitions 0/471 dead transitions. [2024-06-27 21:07:58,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 471 transitions, 7855 flow [2024-06-27 21:07:58,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:07:58,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:07:58,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 21:07:58,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 21:07:58,266 INFO L175 Difference]: Start difference. First operand has 300 places, 440 transitions, 6494 flow. Second operand 9 states and 160 transitions. [2024-06-27 21:07:58,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 471 transitions, 7855 flow [2024-06-27 21:07:59,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 471 transitions, 7685 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-27 21:07:59,361 INFO L231 Difference]: Finished difference. Result has 305 places, 448 transitions, 6694 flow [2024-06-27 21:07:59,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6346, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6694, PETRI_PLACES=305, PETRI_TRANSITIONS=448} [2024-06-27 21:07:59,362 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 264 predicate places. [2024-06-27 21:07:59,362 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 448 transitions, 6694 flow [2024-06-27 21:07:59,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:59,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:59,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:59,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 21:07:59,362 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:59,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:59,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1883646415, now seen corresponding path program 3 times [2024-06-27 21:07:59,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:59,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352228524] [2024-06-27 21:07:59,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:59,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:59,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:00,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:00,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:00,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352228524] [2024-06-27 21:08:00,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352228524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:00,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:00,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:08:00,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004209605] [2024-06-27 21:08:00,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:00,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:08:00,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:00,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:08:00,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:08:00,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:08:00,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 448 transitions, 6694 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:00,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:00,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:08:00,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:01,254 INFO L124 PetriNetUnfolderBase]: 2616/4013 cut-off events. [2024-06-27 21:08:01,254 INFO L125 PetriNetUnfolderBase]: For 293394/293396 co-relation queries the response was YES. [2024-06-27 21:08:01,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34312 conditions, 4013 events. 2616/4013 cut-off events. For 293394/293396 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 21357 event pairs, 440 based on Foata normal form. 6/4018 useless extension candidates. Maximal degree in co-relation 34164. Up to 3718 conditions per place. [2024-06-27 21:08:01,308 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 387 selfloop transitions, 81 changer transitions 0/472 dead transitions. [2024-06-27 21:08:01,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 472 transitions, 7758 flow [2024-06-27 21:08:01,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:08:01,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:08:01,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-27 21:08:01,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 21:08:01,310 INFO L175 Difference]: Start difference. First operand has 305 places, 448 transitions, 6694 flow. Second operand 11 states and 187 transitions. [2024-06-27 21:08:01,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 472 transitions, 7758 flow [2024-06-27 21:08:02,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 472 transitions, 7616 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 21:08:02,732 INFO L231 Difference]: Finished difference. Result has 310 places, 448 transitions, 6725 flow [2024-06-27 21:08:02,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6552, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6725, PETRI_PLACES=310, PETRI_TRANSITIONS=448} [2024-06-27 21:08:02,732 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 269 predicate places. [2024-06-27 21:08:02,733 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 448 transitions, 6725 flow [2024-06-27 21:08:02,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:02,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:02,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:02,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 21:08:02,733 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:02,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:02,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1592577611, now seen corresponding path program 4 times [2024-06-27 21:08:02,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:02,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629676538] [2024-06-27 21:08:02,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:02,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:02,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:03,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:03,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:03,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629676538] [2024-06-27 21:08:03,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629676538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:03,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:03,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:08:03,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9745085] [2024-06-27 21:08:03,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:03,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:08:03,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:03,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:08:03,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:08:03,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:08:03,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 448 transitions, 6725 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:03,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:03,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:08:03,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:04,356 INFO L124 PetriNetUnfolderBase]: 2636/4047 cut-off events. [2024-06-27 21:08:04,356 INFO L125 PetriNetUnfolderBase]: For 293915/293917 co-relation queries the response was YES. [2024-06-27 21:08:04,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34664 conditions, 4047 events. 2636/4047 cut-off events. For 293915/293917 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 21645 event pairs, 466 based on Foata normal form. 6/4052 useless extension candidates. Maximal degree in co-relation 34515. Up to 3870 conditions per place. [2024-06-27 21:08:04,410 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 428 selfloop transitions, 31 changer transitions 0/463 dead transitions. [2024-06-27 21:08:04,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 463 transitions, 7770 flow [2024-06-27 21:08:04,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:08:04,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:08:04,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 21:08:04,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:08:04,412 INFO L175 Difference]: Start difference. First operand has 310 places, 448 transitions, 6725 flow. Second operand 7 states and 120 transitions. [2024-06-27 21:08:04,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 463 transitions, 7770 flow [2024-06-27 21:08:05,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 463 transitions, 7590 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-27 21:08:05,677 INFO L231 Difference]: Finished difference. Result has 307 places, 451 transitions, 6693 flow [2024-06-27 21:08:05,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6545, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6693, PETRI_PLACES=307, PETRI_TRANSITIONS=451} [2024-06-27 21:08:05,677 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 266 predicate places. [2024-06-27 21:08:05,678 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 451 transitions, 6693 flow [2024-06-27 21:08:05,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:05,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:05,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:05,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 21:08:05,679 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:05,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:05,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1710421811, now seen corresponding path program 5 times [2024-06-27 21:08:05,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:05,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841149407] [2024-06-27 21:08:05,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:05,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:05,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:06,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:06,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:06,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841149407] [2024-06-27 21:08:06,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841149407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:06,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:06,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:08:06,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451850793] [2024-06-27 21:08:06,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:06,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:08:06,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:06,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:08:06,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:08:06,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:08:06,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 451 transitions, 6693 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:06,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:06,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:08:06,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:07,477 INFO L124 PetriNetUnfolderBase]: 2656/4071 cut-off events. [2024-06-27 21:08:07,477 INFO L125 PetriNetUnfolderBase]: For 294214/294216 co-relation queries the response was YES. [2024-06-27 21:08:07,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34809 conditions, 4071 events. 2656/4071 cut-off events. For 294214/294216 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 21727 event pairs, 464 based on Foata normal form. 6/4076 useless extension candidates. Maximal degree in co-relation 34660. Up to 3735 conditions per place. [2024-06-27 21:08:07,521 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 400 selfloop transitions, 75 changer transitions 0/479 dead transitions. [2024-06-27 21:08:07,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 479 transitions, 8021 flow [2024-06-27 21:08:07,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:08:07,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:08:07,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 21:08:07,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 21:08:07,522 INFO L175 Difference]: Start difference. First operand has 307 places, 451 transitions, 6693 flow. Second operand 8 states and 144 transitions. [2024-06-27 21:08:07,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 479 transitions, 8021 flow [2024-06-27 21:08:08,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 479 transitions, 7924 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 21:08:08,662 INFO L231 Difference]: Finished difference. Result has 311 places, 456 transitions, 6907 flow [2024-06-27 21:08:08,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6596, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6907, PETRI_PLACES=311, PETRI_TRANSITIONS=456} [2024-06-27 21:08:08,662 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 270 predicate places. [2024-06-27 21:08:08,662 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 456 transitions, 6907 flow [2024-06-27 21:08:08,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:08,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:08,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:08,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 21:08:08,663 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:08,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:08,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1599934841, now seen corresponding path program 6 times [2024-06-27 21:08:08,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:08,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241559047] [2024-06-27 21:08:08,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:08,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:08,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:09,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:09,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:09,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241559047] [2024-06-27 21:08:09,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241559047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:09,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:09,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:08:09,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801832827] [2024-06-27 21:08:09,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:09,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:08:09,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:09,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:08:09,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:08:09,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:08:09,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 456 transitions, 6907 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:09,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:09,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:08:09,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:10,365 INFO L124 PetriNetUnfolderBase]: 2644/4055 cut-off events. [2024-06-27 21:08:10,365 INFO L125 PetriNetUnfolderBase]: For 294063/294065 co-relation queries the response was YES. [2024-06-27 21:08:10,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34721 conditions, 4055 events. 2644/4055 cut-off events. For 294063/294065 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 21665 event pairs, 454 based on Foata normal form. 6/4060 useless extension candidates. Maximal degree in co-relation 34570. Up to 3727 conditions per place. [2024-06-27 21:08:10,416 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 395 selfloop transitions, 81 changer transitions 0/480 dead transitions. [2024-06-27 21:08:10,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 480 transitions, 7991 flow [2024-06-27 21:08:10,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:08:10,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:08:10,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 21:08:10,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45625 [2024-06-27 21:08:10,418 INFO L175 Difference]: Start difference. First operand has 311 places, 456 transitions, 6907 flow. Second operand 8 states and 146 transitions. [2024-06-27 21:08:10,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 480 transitions, 7991 flow [2024-06-27 21:08:11,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 480 transitions, 7820 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-27 21:08:11,649 INFO L231 Difference]: Finished difference. Result has 315 places, 456 transitions, 6909 flow [2024-06-27 21:08:11,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6736, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6909, PETRI_PLACES=315, PETRI_TRANSITIONS=456} [2024-06-27 21:08:11,650 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 274 predicate places. [2024-06-27 21:08:11,650 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 456 transitions, 6909 flow [2024-06-27 21:08:11,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:11,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:11,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:11,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 21:08:11,651 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:11,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:11,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1592310484, now seen corresponding path program 1 times [2024-06-27 21:08:11,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:11,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596857431] [2024-06-27 21:08:11,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:11,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:11,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:12,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:12,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:12,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596857431] [2024-06-27 21:08:12,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596857431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:12,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:12,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:08:12,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318143308] [2024-06-27 21:08:12,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:12,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:08:12,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:12,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:08:12,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:08:12,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:08:12,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 456 transitions, 6909 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:12,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:12,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:08:12,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:13,582 INFO L124 PetriNetUnfolderBase]: 2638/4048 cut-off events. [2024-06-27 21:08:13,582 INFO L125 PetriNetUnfolderBase]: For 285385/285385 co-relation queries the response was YES. [2024-06-27 21:08:13,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34348 conditions, 4048 events. 2638/4048 cut-off events. For 285385/285385 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 21610 event pairs, 464 based on Foata normal form. 2/4049 useless extension candidates. Maximal degree in co-relation 34196. Up to 3836 conditions per place. [2024-06-27 21:08:13,637 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 412 selfloop transitions, 50 changer transitions 0/466 dead transitions. [2024-06-27 21:08:13,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 466 transitions, 7881 flow [2024-06-27 21:08:13,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:08:13,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:08:13,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-27 21:08:13,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44583333333333336 [2024-06-27 21:08:13,639 INFO L175 Difference]: Start difference. First operand has 315 places, 456 transitions, 6909 flow. Second operand 6 states and 107 transitions. [2024-06-27 21:08:13,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 466 transitions, 7881 flow [2024-06-27 21:08:14,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 466 transitions, 7607 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-27 21:08:14,790 INFO L231 Difference]: Finished difference. Result has 313 places, 456 transitions, 6760 flow [2024-06-27 21:08:14,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6635, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6760, PETRI_PLACES=313, PETRI_TRANSITIONS=456} [2024-06-27 21:08:14,790 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 272 predicate places. [2024-06-27 21:08:14,790 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 456 transitions, 6760 flow [2024-06-27 21:08:14,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:14,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:14,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:14,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 21:08:14,791 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:14,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:14,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1658461187, now seen corresponding path program 1 times [2024-06-27 21:08:14,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:14,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781777125] [2024-06-27 21:08:14,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:14,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:14,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:15,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:15,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:15,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781777125] [2024-06-27 21:08:15,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781777125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:15,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:15,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:08:15,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652857251] [2024-06-27 21:08:15,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:15,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:08:15,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:15,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:08:15,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:08:15,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:08:15,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 456 transitions, 6760 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:15,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:15,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:08:15,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:16,742 INFO L124 PetriNetUnfolderBase]: 2694/4140 cut-off events. [2024-06-27 21:08:16,742 INFO L125 PetriNetUnfolderBase]: For 298538/298538 co-relation queries the response was YES. [2024-06-27 21:08:16,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34496 conditions, 4140 events. 2694/4140 cut-off events. For 298538/298538 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 22162 event pairs, 359 based on Foata normal form. 8/4147 useless extension candidates. Maximal degree in co-relation 34345. Up to 3771 conditions per place. [2024-06-27 21:08:16,795 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 437 selfloop transitions, 44 changer transitions 0/485 dead transitions. [2024-06-27 21:08:16,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 485 transitions, 8048 flow [2024-06-27 21:08:16,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:08:16,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:08:16,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 21:08:16,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446875 [2024-06-27 21:08:16,796 INFO L175 Difference]: Start difference. First operand has 313 places, 456 transitions, 6760 flow. Second operand 8 states and 143 transitions. [2024-06-27 21:08:16,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 485 transitions, 8048 flow [2024-06-27 21:08:17,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 485 transitions, 7951 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 21:08:17,703 INFO L231 Difference]: Finished difference. Result has 319 places, 461 transitions, 6847 flow [2024-06-27 21:08:17,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6665, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6847, PETRI_PLACES=319, PETRI_TRANSITIONS=461} [2024-06-27 21:08:17,704 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 278 predicate places. [2024-06-27 21:08:17,704 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 461 transitions, 6847 flow [2024-06-27 21:08:17,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:17,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:17,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:17,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 21:08:17,705 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:17,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:17,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1837837925, now seen corresponding path program 2 times [2024-06-27 21:08:17,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:17,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20098036] [2024-06-27 21:08:17,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:17,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:17,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:18,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:18,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:18,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20098036] [2024-06-27 21:08:18,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20098036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:18,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:18,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:08:18,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431771765] [2024-06-27 21:08:18,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:18,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:08:18,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:18,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:08:18,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:08:18,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:08:18,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 461 transitions, 6847 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:18,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:18,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:08:18,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:19,682 INFO L124 PetriNetUnfolderBase]: 2676/4114 cut-off events. [2024-06-27 21:08:19,683 INFO L125 PetriNetUnfolderBase]: For 282908/282908 co-relation queries the response was YES. [2024-06-27 21:08:19,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34096 conditions, 4114 events. 2676/4114 cut-off events. For 282908/282908 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 22046 event pairs, 343 based on Foata normal form. 8/4121 useless extension candidates. Maximal degree in co-relation 33942. Up to 3763 conditions per place. [2024-06-27 21:08:19,736 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 434 selfloop transitions, 44 changer transitions 0/482 dead transitions. [2024-06-27 21:08:19,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 482 transitions, 7929 flow [2024-06-27 21:08:19,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:08:19,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:08:19,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-27 21:08:19,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607142857142857 [2024-06-27 21:08:19,737 INFO L175 Difference]: Start difference. First operand has 319 places, 461 transitions, 6847 flow. Second operand 7 states and 129 transitions. [2024-06-27 21:08:19,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 482 transitions, 7929 flow [2024-06-27 21:08:20,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 482 transitions, 7835 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 21:08:20,749 INFO L231 Difference]: Finished difference. Result has 322 places, 461 transitions, 6847 flow [2024-06-27 21:08:20,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6753, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6847, PETRI_PLACES=322, PETRI_TRANSITIONS=461} [2024-06-27 21:08:20,750 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 281 predicate places. [2024-06-27 21:08:20,750 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 461 transitions, 6847 flow [2024-06-27 21:08:20,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:20,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:20,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:20,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 21:08:20,750 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:20,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:20,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1018073243, now seen corresponding path program 7 times [2024-06-27 21:08:20,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:20,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375976667] [2024-06-27 21:08:20,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:20,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:20,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:21,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:21,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:21,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375976667] [2024-06-27 21:08:21,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375976667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:21,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:21,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:08:21,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972117328] [2024-06-27 21:08:21,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:21,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:08:21,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:21,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:08:21,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:08:21,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:08:21,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 461 transitions, 6847 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:21,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:21,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:08:21,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:22,675 INFO L124 PetriNetUnfolderBase]: 2812/4316 cut-off events. [2024-06-27 21:08:22,675 INFO L125 PetriNetUnfolderBase]: For 303696/303698 co-relation queries the response was YES. [2024-06-27 21:08:22,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36380 conditions, 4316 events. 2812/4316 cut-off events. For 303696/303698 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 23290 event pairs, 483 based on Foata normal form. 6/4321 useless extension candidates. Maximal degree in co-relation 36225. Up to 3779 conditions per place. [2024-06-27 21:08:22,727 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 394 selfloop transitions, 129 changer transitions 0/527 dead transitions. [2024-06-27 21:08:22,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 527 transitions, 8917 flow [2024-06-27 21:08:22,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:08:22,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:08:22,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 193 transitions. [2024-06-27 21:08:22,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43863636363636366 [2024-06-27 21:08:22,729 INFO L175 Difference]: Start difference. First operand has 322 places, 461 transitions, 6847 flow. Second operand 11 states and 193 transitions. [2024-06-27 21:08:22,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 527 transitions, 8917 flow [2024-06-27 21:08:24,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 527 transitions, 8837 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 21:08:24,076 INFO L231 Difference]: Finished difference. Result has 329 places, 490 transitions, 7615 flow [2024-06-27 21:08:24,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6771, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7615, PETRI_PLACES=329, PETRI_TRANSITIONS=490} [2024-06-27 21:08:24,077 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 288 predicate places. [2024-06-27 21:08:24,077 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 490 transitions, 7615 flow [2024-06-27 21:08:24,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:24,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:24,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:24,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 21:08:24,078 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:24,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:24,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1646616141, now seen corresponding path program 8 times [2024-06-27 21:08:24,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:24,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818440650] [2024-06-27 21:08:24,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:24,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:24,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:24,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:24,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:24,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818440650] [2024-06-27 21:08:24,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818440650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:24,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:24,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:08:24,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992937895] [2024-06-27 21:08:24,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:24,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:08:24,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:24,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:08:24,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:08:24,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:08:24,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 490 transitions, 7615 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:24,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:24,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:08:24,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:26,041 INFO L124 PetriNetUnfolderBase]: 2874/4410 cut-off events. [2024-06-27 21:08:26,041 INFO L125 PetriNetUnfolderBase]: For 319157/319159 co-relation queries the response was YES. [2024-06-27 21:08:26,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38037 conditions, 4410 events. 2874/4410 cut-off events. For 319157/319159 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 23873 event pairs, 487 based on Foata normal form. 6/4415 useless extension candidates. Maximal degree in co-relation 37881. Up to 4081 conditions per place. [2024-06-27 21:08:26,201 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 457 selfloop transitions, 71 changer transitions 0/532 dead transitions. [2024-06-27 21:08:26,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 532 transitions, 9234 flow [2024-06-27 21:08:26,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:08:26,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:08:26,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 200 transitions. [2024-06-27 21:08:26,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 21:08:26,203 INFO L175 Difference]: Start difference. First operand has 329 places, 490 transitions, 7615 flow. Second operand 12 states and 200 transitions. [2024-06-27 21:08:26,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 532 transitions, 9234 flow [2024-06-27 21:08:27,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 532 transitions, 8868 flow, removed 139 selfloop flow, removed 5 redundant places. [2024-06-27 21:08:27,523 INFO L231 Difference]: Finished difference. Result has 337 places, 501 transitions, 7660 flow [2024-06-27 21:08:27,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7331, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7660, PETRI_PLACES=337, PETRI_TRANSITIONS=501} [2024-06-27 21:08:27,523 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 296 predicate places. [2024-06-27 21:08:27,523 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 501 transitions, 7660 flow [2024-06-27 21:08:27,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:27,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:27,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:27,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 21:08:27,524 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:27,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:27,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1646610561, now seen corresponding path program 9 times [2024-06-27 21:08:27,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:27,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562299833] [2024-06-27 21:08:27,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:27,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:27,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:28,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:28,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:28,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562299833] [2024-06-27 21:08:28,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562299833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:28,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:28,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:08:28,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754862772] [2024-06-27 21:08:28,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:28,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:08:28,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:28,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:08:28,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:08:28,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:08:28,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 501 transitions, 7660 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:28,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:28,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:08:28,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:29,535 INFO L124 PetriNetUnfolderBase]: 2862/4394 cut-off events. [2024-06-27 21:08:29,536 INFO L125 PetriNetUnfolderBase]: For 313889/313891 co-relation queries the response was YES. [2024-06-27 21:08:29,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37116 conditions, 4394 events. 2862/4394 cut-off events. For 313889/313891 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 23821 event pairs, 485 based on Foata normal form. 6/4399 useless extension candidates. Maximal degree in co-relation 36960. Up to 4073 conditions per place. [2024-06-27 21:08:29,596 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 455 selfloop transitions, 71 changer transitions 0/530 dead transitions. [2024-06-27 21:08:29,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 530 transitions, 8897 flow [2024-06-27 21:08:29,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:08:29,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:08:29,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-27 21:08:29,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42272727272727273 [2024-06-27 21:08:29,597 INFO L175 Difference]: Start difference. First operand has 337 places, 501 transitions, 7660 flow. Second operand 11 states and 186 transitions. [2024-06-27 21:08:29,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 530 transitions, 8897 flow [2024-06-27 21:08:30,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 530 transitions, 8764 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-27 21:08:30,995 INFO L231 Difference]: Finished difference. Result has 340 places, 501 transitions, 7676 flow [2024-06-27 21:08:30,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7527, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7676, PETRI_PLACES=340, PETRI_TRANSITIONS=501} [2024-06-27 21:08:30,995 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 299 predicate places. [2024-06-27 21:08:30,996 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 501 transitions, 7676 flow [2024-06-27 21:08:30,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:30,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:30,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:30,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 21:08:30,996 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:30,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:30,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1903429149, now seen corresponding path program 10 times [2024-06-27 21:08:30,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:30,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071279801] [2024-06-27 21:08:30,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:30,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:31,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:31,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:31,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:31,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071279801] [2024-06-27 21:08:31,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071279801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:31,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:31,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:08:31,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197355062] [2024-06-27 21:08:31,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:31,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:08:31,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:31,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:08:31,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:08:31,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:08:31,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 501 transitions, 7676 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:31,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:31,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:08:31,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:33,094 INFO L124 PetriNetUnfolderBase]: 2892/4432 cut-off events. [2024-06-27 21:08:33,094 INFO L125 PetriNetUnfolderBase]: For 313894/313896 co-relation queries the response was YES. [2024-06-27 21:08:33,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37484 conditions, 4432 events. 2892/4432 cut-off events. For 313894/313896 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 23986 event pairs, 489 based on Foata normal form. 6/4437 useless extension candidates. Maximal degree in co-relation 37327. Up to 3983 conditions per place. [2024-06-27 21:08:33,154 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 402 selfloop transitions, 133 changer transitions 0/539 dead transitions. [2024-06-27 21:08:33,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 539 transitions, 9147 flow [2024-06-27 21:08:33,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:08:33,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:08:33,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-27 21:08:33,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 21:08:33,156 INFO L175 Difference]: Start difference. First operand has 340 places, 501 transitions, 7676 flow. Second operand 10 states and 175 transitions. [2024-06-27 21:08:33,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 539 transitions, 9147 flow [2024-06-27 21:08:34,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 539 transitions, 9005 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-27 21:08:34,452 INFO L231 Difference]: Finished difference. Result has 340 places, 509 transitions, 7921 flow [2024-06-27 21:08:34,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7534, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7921, PETRI_PLACES=340, PETRI_TRANSITIONS=509} [2024-06-27 21:08:34,453 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 299 predicate places. [2024-06-27 21:08:34,453 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 509 transitions, 7921 flow [2024-06-27 21:08:34,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:34,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:34,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:34,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 21:08:34,454 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:34,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:34,454 INFO L85 PathProgramCache]: Analyzing trace with hash 2106573861, now seen corresponding path program 11 times [2024-06-27 21:08:34,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:34,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574774759] [2024-06-27 21:08:34,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:34,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:34,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:35,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:35,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:35,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574774759] [2024-06-27 21:08:35,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574774759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:35,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:35,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:08:35,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663277871] [2024-06-27 21:08:35,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:35,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:08:35,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:35,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:08:35,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:08:35,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:08:35,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 509 transitions, 7921 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:35,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:35,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:08:35,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:36,255 INFO L124 PetriNetUnfolderBase]: 2968/4543 cut-off events. [2024-06-27 21:08:36,255 INFO L125 PetriNetUnfolderBase]: For 341603/341605 co-relation queries the response was YES. [2024-06-27 21:08:36,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39194 conditions, 4543 events. 2968/4543 cut-off events. For 341603/341605 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 24635 event pairs, 468 based on Foata normal form. 6/4548 useless extension candidates. Maximal degree in co-relation 39036. Up to 3551 conditions per place. [2024-06-27 21:08:36,321 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 333 selfloop transitions, 209 changer transitions 0/546 dead transitions. [2024-06-27 21:08:36,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 546 transitions, 9658 flow [2024-06-27 21:08:36,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:08:36,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:08:36,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 21:08:36,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 21:08:36,322 INFO L175 Difference]: Start difference. First operand has 340 places, 509 transitions, 7921 flow. Second operand 9 states and 165 transitions. [2024-06-27 21:08:36,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 546 transitions, 9658 flow [2024-06-27 21:08:37,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 546 transitions, 9264 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-27 21:08:37,868 INFO L231 Difference]: Finished difference. Result has 341 places, 518 transitions, 8159 flow [2024-06-27 21:08:37,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7537, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8159, PETRI_PLACES=341, PETRI_TRANSITIONS=518} [2024-06-27 21:08:37,869 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 300 predicate places. [2024-06-27 21:08:37,869 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 518 transitions, 8159 flow [2024-06-27 21:08:37,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:37,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:37,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:37,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 21:08:37,870 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:37,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:37,870 INFO L85 PathProgramCache]: Analyzing trace with hash 2106158151, now seen corresponding path program 12 times [2024-06-27 21:08:37,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:37,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963224584] [2024-06-27 21:08:37,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:37,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:37,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:38,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:38,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:38,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963224584] [2024-06-27 21:08:38,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963224584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:38,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:38,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:08:38,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431720579] [2024-06-27 21:08:38,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:38,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:08:38,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:38,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:08:38,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:08:38,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:08:38,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 518 transitions, 8159 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:38,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:38,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:08:38,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:39,870 INFO L124 PetriNetUnfolderBase]: 2956/4531 cut-off events. [2024-06-27 21:08:39,870 INFO L125 PetriNetUnfolderBase]: For 343405/343407 co-relation queries the response was YES. [2024-06-27 21:08:39,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39270 conditions, 4531 events. 2956/4531 cut-off events. For 343405/343407 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 24631 event pairs, 510 based on Foata normal form. 6/4536 useless extension candidates. Maximal degree in co-relation 39113. Up to 4104 conditions per place. [2024-06-27 21:08:39,926 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 400 selfloop transitions, 135 changer transitions 0/539 dead transitions. [2024-06-27 21:08:39,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 539 transitions, 9319 flow [2024-06-27 21:08:39,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:08:39,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:08:39,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 21:08:39,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-27 21:08:39,927 INFO L175 Difference]: Start difference. First operand has 341 places, 518 transitions, 8159 flow. Second operand 9 states and 156 transitions. [2024-06-27 21:08:39,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 539 transitions, 9319 flow [2024-06-27 21:08:41,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 539 transitions, 9081 flow, removed 58 selfloop flow, removed 4 redundant places. [2024-06-27 21:08:41,737 INFO L231 Difference]: Finished difference. Result has 346 places, 518 transitions, 8198 flow [2024-06-27 21:08:41,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7921, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8198, PETRI_PLACES=346, PETRI_TRANSITIONS=518} [2024-06-27 21:08:41,738 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 305 predicate places. [2024-06-27 21:08:41,738 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 518 transitions, 8198 flow [2024-06-27 21:08:41,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:41,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:41,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:41,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 21:08:41,738 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:41,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:41,739 INFO L85 PathProgramCache]: Analyzing trace with hash 2024860161, now seen corresponding path program 13 times [2024-06-27 21:08:41,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:41,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664462898] [2024-06-27 21:08:41,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:41,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:41,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:42,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:42,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:42,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664462898] [2024-06-27 21:08:42,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664462898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:42,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:42,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:08:42,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227038191] [2024-06-27 21:08:42,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:42,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:08:42,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:42,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:08:42,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:08:42,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:08:42,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 518 transitions, 8198 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:42,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:42,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:08:42,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:43,821 INFO L124 PetriNetUnfolderBase]: 2976/4559 cut-off events. [2024-06-27 21:08:43,821 INFO L125 PetriNetUnfolderBase]: For 344418/344420 co-relation queries the response was YES. [2024-06-27 21:08:43,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39080 conditions, 4559 events. 2976/4559 cut-off events. For 344418/344420 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 24815 event pairs, 515 based on Foata normal form. 6/4564 useless extension candidates. Maximal degree in co-relation 38921. Up to 4275 conditions per place. [2024-06-27 21:08:43,882 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 457 selfloop transitions, 78 changer transitions 0/539 dead transitions. [2024-06-27 21:08:43,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 539 transitions, 9396 flow [2024-06-27 21:08:43,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:08:43,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:08:43,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 21:08:43,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-27 21:08:43,884 INFO L175 Difference]: Start difference. First operand has 346 places, 518 transitions, 8198 flow. Second operand 9 states and 152 transitions. [2024-06-27 21:08:43,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 539 transitions, 9396 flow [2024-06-27 21:08:45,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 539 transitions, 9082 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 21:08:45,927 INFO L231 Difference]: Finished difference. Result has 347 places, 521 transitions, 8099 flow [2024-06-27 21:08:45,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7884, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8099, PETRI_PLACES=347, PETRI_TRANSITIONS=521} [2024-06-27 21:08:45,927 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 306 predicate places. [2024-06-27 21:08:45,927 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 521 transitions, 8099 flow [2024-06-27 21:08:45,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:45,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:45,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:45,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 21:08:45,928 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:45,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:45,929 INFO L85 PathProgramCache]: Analyzing trace with hash -698487113, now seen corresponding path program 14 times [2024-06-27 21:08:45,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:45,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172038076] [2024-06-27 21:08:45,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:45,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:45,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:46,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:46,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:46,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172038076] [2024-06-27 21:08:46,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172038076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:46,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:46,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:08:46,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82254074] [2024-06-27 21:08:46,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:46,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:08:46,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:46,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:08:46,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:08:46,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:08:46,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 521 transitions, 8099 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:46,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:46,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:08:46,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:47,893 INFO L124 PetriNetUnfolderBase]: 3060/4679 cut-off events. [2024-06-27 21:08:47,894 INFO L125 PetriNetUnfolderBase]: For 375063/375065 co-relation queries the response was YES. [2024-06-27 21:08:47,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40668 conditions, 4679 events. 3060/4679 cut-off events. For 375063/375065 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 25485 event pairs, 472 based on Foata normal form. 6/4684 useless extension candidates. Maximal degree in co-relation 40508. Up to 4042 conditions per place. [2024-06-27 21:08:47,960 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 411 selfloop transitions, 148 changer transitions 0/563 dead transitions. [2024-06-27 21:08:47,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 563 transitions, 9943 flow [2024-06-27 21:08:47,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:08:47,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:08:47,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 205 transitions. [2024-06-27 21:08:47,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4270833333333333 [2024-06-27 21:08:47,962 INFO L175 Difference]: Start difference. First operand has 347 places, 521 transitions, 8099 flow. Second operand 12 states and 205 transitions. [2024-06-27 21:08:47,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 563 transitions, 9943 flow [2024-06-27 21:08:50,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 563 transitions, 9768 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 21:08:50,083 INFO L231 Difference]: Finished difference. Result has 354 places, 530 transitions, 8472 flow [2024-06-27 21:08:50,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7924, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8472, PETRI_PLACES=354, PETRI_TRANSITIONS=530} [2024-06-27 21:08:50,084 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 313 predicate places. [2024-06-27 21:08:50,084 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 530 transitions, 8472 flow [2024-06-27 21:08:50,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:50,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:50,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:50,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 21:08:50,085 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:50,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:50,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1385632835, now seen corresponding path program 15 times [2024-06-27 21:08:50,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:50,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501244768] [2024-06-27 21:08:50,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:50,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:50,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:50,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:50,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:50,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501244768] [2024-06-27 21:08:50,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501244768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:50,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:50,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:08:50,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381852384] [2024-06-27 21:08:50,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:50,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:08:50,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:50,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:08:50,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:08:50,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:08:50,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 530 transitions, 8472 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:50,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:50,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:08:50,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:51,974 INFO L124 PetriNetUnfolderBase]: 3112/4755 cut-off events. [2024-06-27 21:08:51,974 INFO L125 PetriNetUnfolderBase]: For 397833/397835 co-relation queries the response was YES. [2024-06-27 21:08:52,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42231 conditions, 4755 events. 3112/4755 cut-off events. For 397833/397835 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 26040 event pairs, 476 based on Foata normal form. 6/4760 useless extension candidates. Maximal degree in co-relation 42069. Up to 4082 conditions per place. [2024-06-27 21:08:52,045 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 415 selfloop transitions, 145 changer transitions 0/564 dead transitions. [2024-06-27 21:08:52,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 564 transitions, 10229 flow [2024-06-27 21:08:52,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:08:52,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:08:52,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 21:08:52,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527777777777778 [2024-06-27 21:08:52,046 INFO L175 Difference]: Start difference. First operand has 354 places, 530 transitions, 8472 flow. Second operand 9 states and 163 transitions. [2024-06-27 21:08:52,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 564 transitions, 10229 flow [2024-06-27 21:08:54,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 564 transitions, 9961 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-27 21:08:54,186 INFO L231 Difference]: Finished difference. Result has 356 places, 536 transitions, 8639 flow [2024-06-27 21:08:54,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8236, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8639, PETRI_PLACES=356, PETRI_TRANSITIONS=536} [2024-06-27 21:08:54,186 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 315 predicate places. [2024-06-27 21:08:54,187 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 536 transitions, 8639 flow [2024-06-27 21:08:54,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:54,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:54,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:54,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 21:08:54,187 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:54,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:54,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1723914407, now seen corresponding path program 16 times [2024-06-27 21:08:54,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:54,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240606703] [2024-06-27 21:08:54,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:54,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:54,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:54,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:54,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:54,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240606703] [2024-06-27 21:08:54,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240606703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:54,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:54,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:08:54,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211479342] [2024-06-27 21:08:54,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:54,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:08:54,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:54,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:08:54,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:08:55,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:08:55,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 536 transitions, 8639 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:55,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:55,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:08:55,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:56,423 INFO L124 PetriNetUnfolderBase]: 3100/4745 cut-off events. [2024-06-27 21:08:56,423 INFO L125 PetriNetUnfolderBase]: For 394599/394601 co-relation queries the response was YES. [2024-06-27 21:08:56,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42045 conditions, 4745 events. 3100/4745 cut-off events. For 394599/394601 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 25998 event pairs, 535 based on Foata normal form. 6/4750 useless extension candidates. Maximal degree in co-relation 41881. Up to 4387 conditions per place. [2024-06-27 21:08:56,486 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 473 selfloop transitions, 88 changer transitions 0/565 dead transitions. [2024-06-27 21:08:56,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 565 transitions, 10080 flow [2024-06-27 21:08:56,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 21:08:56,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 21:08:56,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 212 transitions. [2024-06-27 21:08:56,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076923076923077 [2024-06-27 21:08:56,488 INFO L175 Difference]: Start difference. First operand has 356 places, 536 transitions, 8639 flow. Second operand 13 states and 212 transitions. [2024-06-27 21:08:56,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 565 transitions, 10080 flow [2024-06-27 21:08:58,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 565 transitions, 9818 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 21:08:58,993 INFO L231 Difference]: Finished difference. Result has 364 places, 536 transitions, 8560 flow [2024-06-27 21:08:58,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8377, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8560, PETRI_PLACES=364, PETRI_TRANSITIONS=536} [2024-06-27 21:08:58,993 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 323 predicate places. [2024-06-27 21:08:58,994 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 536 transitions, 8560 flow [2024-06-27 21:08:58,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:58,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:58,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:58,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 21:08:58,994 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:58,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:58,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1377871055, now seen corresponding path program 17 times [2024-06-27 21:08:58,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:58,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305320809] [2024-06-27 21:08:58,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:58,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:59,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:59,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:59,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:59,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305320809] [2024-06-27 21:08:59,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305320809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:59,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:59,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:08:59,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918080566] [2024-06-27 21:08:59,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:59,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:08:59,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:59,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:08:59,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:08:59,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:08:59,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 536 transitions, 8560 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:59,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:59,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:08:59,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:01,237 INFO L124 PetriNetUnfolderBase]: 3088/4731 cut-off events. [2024-06-27 21:09:01,237 INFO L125 PetriNetUnfolderBase]: For 391177/391179 co-relation queries the response was YES. [2024-06-27 21:09:01,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41419 conditions, 4731 events. 3088/4731 cut-off events. For 391177/391179 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 25935 event pairs, 535 based on Foata normal form. 6/4736 useless extension candidates. Maximal degree in co-relation 41254. Up to 4379 conditions per place. [2024-06-27 21:09:01,298 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 467 selfloop transitions, 88 changer transitions 0/559 dead transitions. [2024-06-27 21:09:01,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 559 transitions, 9796 flow [2024-06-27 21:09:01,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:09:01,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:09:01,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-27 21:09:01,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41363636363636364 [2024-06-27 21:09:01,300 INFO L175 Difference]: Start difference. First operand has 364 places, 536 transitions, 8560 flow. Second operand 11 states and 182 transitions. [2024-06-27 21:09:01,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 559 transitions, 9796 flow [2024-06-27 21:09:03,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 559 transitions, 9525 flow, removed 24 selfloop flow, removed 11 redundant places. [2024-06-27 21:09:03,526 INFO L231 Difference]: Finished difference. Result has 364 places, 536 transitions, 8471 flow [2024-06-27 21:09:03,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8289, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8471, PETRI_PLACES=364, PETRI_TRANSITIONS=536} [2024-06-27 21:09:03,526 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 323 predicate places. [2024-06-27 21:09:03,527 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 536 transitions, 8471 flow [2024-06-27 21:09:03,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:03,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:03,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:03,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 21:09:03,527 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:09:03,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:03,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1390995215, now seen corresponding path program 18 times [2024-06-27 21:09:03,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:03,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578588348] [2024-06-27 21:09:03,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:03,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:03,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:04,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:04,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:04,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578588348] [2024-06-27 21:09:04,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578588348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:04,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:04,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:09:04,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877687623] [2024-06-27 21:09:04,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:04,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:09:04,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:04,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:09:04,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:09:04,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:09:04,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 536 transitions, 8471 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:04,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:04,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:09:04,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:05,471 INFO L124 PetriNetUnfolderBase]: 3076/4707 cut-off events. [2024-06-27 21:09:05,471 INFO L125 PetriNetUnfolderBase]: For 388635/388637 co-relation queries the response was YES. [2024-06-27 21:09:05,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40978 conditions, 4707 events. 3076/4707 cut-off events. For 388635/388637 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 25771 event pairs, 476 based on Foata normal form. 6/4712 useless extension candidates. Maximal degree in co-relation 40813. Up to 4058 conditions per place. [2024-06-27 21:09:05,542 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 408 selfloop transitions, 152 changer transitions 0/564 dead transitions. [2024-06-27 21:09:05,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 564 transitions, 9797 flow [2024-06-27 21:09:05,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:09:05,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:09:05,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-27 21:09:05,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42954545454545456 [2024-06-27 21:09:05,544 INFO L175 Difference]: Start difference. First operand has 364 places, 536 transitions, 8471 flow. Second operand 11 states and 189 transitions. [2024-06-27 21:09:05,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 564 transitions, 9797 flow [2024-06-27 21:09:07,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 564 transitions, 9595 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-27 21:09:07,916 INFO L231 Difference]: Finished difference. Result has 365 places, 536 transitions, 8579 flow [2024-06-27 21:09:07,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8269, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8579, PETRI_PLACES=365, PETRI_TRANSITIONS=536} [2024-06-27 21:09:07,916 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 324 predicate places. [2024-06-27 21:09:07,917 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 536 transitions, 8579 flow [2024-06-27 21:09:07,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:07,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:07,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:07,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 21:09:07,917 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:09:07,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:07,918 INFO L85 PathProgramCache]: Analyzing trace with hash -847856475, now seen corresponding path program 19 times [2024-06-27 21:09:07,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:07,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013485152] [2024-06-27 21:09:07,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:07,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:07,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:08,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:08,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:08,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013485152] [2024-06-27 21:09:08,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013485152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:08,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:08,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:09:08,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653837576] [2024-06-27 21:09:08,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:08,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:09:08,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:08,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:09:08,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:09:08,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:09:08,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 536 transitions, 8579 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:08,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:08,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:09:08,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:09,923 INFO L124 PetriNetUnfolderBase]: 3096/4737 cut-off events. [2024-06-27 21:09:09,923 INFO L125 PetriNetUnfolderBase]: For 399400/399402 co-relation queries the response was YES. [2024-06-27 21:09:09,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41576 conditions, 4737 events. 3096/4737 cut-off events. For 399400/399402 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 26001 event pairs, 529 based on Foata normal form. 6/4742 useless extension candidates. Maximal degree in co-relation 41410. Up to 4327 conditions per place. [2024-06-27 21:09:09,994 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 485 selfloop transitions, 83 changer transitions 0/572 dead transitions. [2024-06-27 21:09:09,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 572 transitions, 10265 flow [2024-06-27 21:09:09,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:09:09,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:09:09,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-27 21:09:09,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4475 [2024-06-27 21:09:09,997 INFO L175 Difference]: Start difference. First operand has 365 places, 536 transitions, 8579 flow. Second operand 10 states and 179 transitions. [2024-06-27 21:09:09,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 572 transitions, 10265 flow [2024-06-27 21:09:12,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 572 transitions, 9905 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-27 21:09:12,337 INFO L231 Difference]: Finished difference. Result has 364 places, 539 transitions, 8450 flow [2024-06-27 21:09:12,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8219, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8450, PETRI_PLACES=364, PETRI_TRANSITIONS=539} [2024-06-27 21:09:12,337 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 323 predicate places. [2024-06-27 21:09:12,338 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 539 transitions, 8450 flow [2024-06-27 21:09:12,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:12,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:12,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:12,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 21:09:12,338 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:09:12,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:12,339 INFO L85 PathProgramCache]: Analyzing trace with hash -847850895, now seen corresponding path program 20 times [2024-06-27 21:09:12,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:12,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161868696] [2024-06-27 21:09:12,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:12,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:12,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:12,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:12,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:12,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161868696] [2024-06-27 21:09:12,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161868696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:12,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:12,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:09:12,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654053752] [2024-06-27 21:09:12,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:12,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:09:12,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:12,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:09:12,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:09:13,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:09:13,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 539 transitions, 8450 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:13,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:13,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:09:13,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:14,188 INFO L124 PetriNetUnfolderBase]: 3084/4725 cut-off events. [2024-06-27 21:09:14,188 INFO L125 PetriNetUnfolderBase]: For 395640/395642 co-relation queries the response was YES. [2024-06-27 21:09:14,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40977 conditions, 4725 events. 3084/4725 cut-off events. For 395640/395642 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 25935 event pairs, 527 based on Foata normal form. 6/4730 useless extension candidates. Maximal degree in co-relation 40810. Up to 4319 conditions per place. [2024-06-27 21:09:14,256 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 479 selfloop transitions, 79 changer transitions 0/562 dead transitions. [2024-06-27 21:09:14,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 562 transitions, 9843 flow [2024-06-27 21:09:14,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:09:14,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:09:14,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:09:14,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-27 21:09:14,258 INFO L175 Difference]: Start difference. First operand has 364 places, 539 transitions, 8450 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:09:14,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 562 transitions, 9843 flow [2024-06-27 21:09:16,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 562 transitions, 9451 flow, removed 38 selfloop flow, removed 9 redundant places. [2024-06-27 21:09:16,482 INFO L231 Difference]: Finished difference. Result has 363 places, 539 transitions, 8222 flow [2024-06-27 21:09:16,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8058, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8222, PETRI_PLACES=363, PETRI_TRANSITIONS=539} [2024-06-27 21:09:16,484 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 322 predicate places. [2024-06-27 21:09:16,485 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 539 transitions, 8222 flow [2024-06-27 21:09:16,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:16,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:16,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:16,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 21:09:16,485 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:09:16,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:16,486 INFO L85 PathProgramCache]: Analyzing trace with hash -840504825, now seen corresponding path program 21 times [2024-06-27 21:09:16,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:16,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299347349] [2024-06-27 21:09:16,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:16,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:16,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:17,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:17,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:17,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299347349] [2024-06-27 21:09:17,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299347349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:17,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:17,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:09:17,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369478540] [2024-06-27 21:09:17,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:17,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:09:17,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:17,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:09:17,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:09:17,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:09:17,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 539 transitions, 8222 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:17,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:17,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:09:17,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:18,544 INFO L124 PetriNetUnfolderBase]: 3072/4707 cut-off events. [2024-06-27 21:09:18,545 INFO L125 PetriNetUnfolderBase]: For 390619/390621 co-relation queries the response was YES. [2024-06-27 21:09:18,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40136 conditions, 4707 events. 3072/4707 cut-off events. For 390619/390621 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 25783 event pairs, 519 based on Foata normal form. 6/4712 useless extension candidates. Maximal degree in co-relation 39970. Up to 4363 conditions per place. [2024-06-27 21:09:18,611 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 479 selfloop transitions, 79 changer transitions 0/562 dead transitions. [2024-06-27 21:09:18,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 562 transitions, 9435 flow [2024-06-27 21:09:18,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:09:18,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:09:18,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:09:18,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-27 21:09:18,613 INFO L175 Difference]: Start difference. First operand has 363 places, 539 transitions, 8222 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:09:18,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 562 transitions, 9435 flow [2024-06-27 21:09:20,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 562 transitions, 9276 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 21:09:20,849 INFO L231 Difference]: Finished difference. Result has 365 places, 539 transitions, 8228 flow [2024-06-27 21:09:20,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8063, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8228, PETRI_PLACES=365, PETRI_TRANSITIONS=539} [2024-06-27 21:09:20,850 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 324 predicate places. [2024-06-27 21:09:20,850 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 539 transitions, 8228 flow [2024-06-27 21:09:20,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:20,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:20,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:20,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 21:09:20,851 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:09:20,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:20,851 INFO L85 PathProgramCache]: Analyzing trace with hash -834726735, now seen corresponding path program 22 times [2024-06-27 21:09:20,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:20,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070206480] [2024-06-27 21:09:20,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:20,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:20,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:21,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:21,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:21,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070206480] [2024-06-27 21:09:21,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070206480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:21,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:21,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:09:21,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002413983] [2024-06-27 21:09:21,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:21,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:09:21,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:21,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:09:21,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:09:21,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:09:21,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 539 transitions, 8228 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:21,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:21,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:09:21,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:22,774 INFO L124 PetriNetUnfolderBase]: 3156/4827 cut-off events. [2024-06-27 21:09:22,774 INFO L125 PetriNetUnfolderBase]: For 428452/428454 co-relation queries the response was YES. [2024-06-27 21:09:22,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42014 conditions, 4827 events. 3156/4827 cut-off events. For 428452/428454 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 26586 event pairs, 520 based on Foata normal form. 6/4832 useless extension candidates. Maximal degree in co-relation 41847. Up to 4144 conditions per place. [2024-06-27 21:09:22,834 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 440 selfloop transitions, 129 changer transitions 0/573 dead transitions. [2024-06-27 21:09:22,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 573 transitions, 10247 flow [2024-06-27 21:09:22,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:09:22,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:09:22,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 21:09:22,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-06-27 21:09:22,835 INFO L175 Difference]: Start difference. First operand has 365 places, 539 transitions, 8228 flow. Second operand 8 states and 148 transitions. [2024-06-27 21:09:22,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 573 transitions, 10247 flow [2024-06-27 21:09:24,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 573 transitions, 9986 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 21:09:24,777 INFO L231 Difference]: Finished difference. Result has 365 places, 548 transitions, 8465 flow [2024-06-27 21:09:24,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7967, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8465, PETRI_PLACES=365, PETRI_TRANSITIONS=548} [2024-06-27 21:09:24,778 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 324 predicate places. [2024-06-27 21:09:24,778 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 548 transitions, 8465 flow [2024-06-27 21:09:24,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:24,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:24,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:24,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 21:09:24,778 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:09:24,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:24,779 INFO L85 PathProgramCache]: Analyzing trace with hash -834963885, now seen corresponding path program 23 times [2024-06-27 21:09:24,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:24,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230878406] [2024-06-27 21:09:24,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:24,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:24,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:25,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:25,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:25,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230878406] [2024-06-27 21:09:25,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230878406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:25,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:25,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:09:25,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028232208] [2024-06-27 21:09:25,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:25,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:09:25,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:25,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:09:25,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:09:25,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:09:25,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 548 transitions, 8465 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:25,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:25,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:09:25,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:26,646 INFO L124 PetriNetUnfolderBase]: 3144/4811 cut-off events. [2024-06-27 21:09:26,647 INFO L125 PetriNetUnfolderBase]: For 425682/425684 co-relation queries the response was YES. [2024-06-27 21:09:26,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41841 conditions, 4811 events. 3144/4811 cut-off events. For 425682/425684 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 26509 event pairs, 526 based on Foata normal form. 6/4816 useless extension candidates. Maximal degree in co-relation 41673. Up to 4136 conditions per place. [2024-06-27 21:09:26,719 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 441 selfloop transitions, 127 changer transitions 0/572 dead transitions. [2024-06-27 21:09:26,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 572 transitions, 10090 flow [2024-06-27 21:09:26,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:09:26,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:09:26,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 21:09:26,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.459375 [2024-06-27 21:09:26,720 INFO L175 Difference]: Start difference. First operand has 365 places, 548 transitions, 8465 flow. Second operand 8 states and 147 transitions. [2024-06-27 21:09:26,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 572 transitions, 10090 flow [2024-06-27 21:09:29,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 572 transitions, 9849 flow, removed 60 selfloop flow, removed 3 redundant places. [2024-06-27 21:09:29,549 INFO L231 Difference]: Finished difference. Result has 370 places, 548 transitions, 8484 flow [2024-06-27 21:09:29,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8224, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8484, PETRI_PLACES=370, PETRI_TRANSITIONS=548} [2024-06-27 21:09:29,550 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 329 predicate places. [2024-06-27 21:09:29,550 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 548 transitions, 8484 flow [2024-06-27 21:09:29,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:29,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:29,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:29,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 21:09:29,550 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:09:29,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:29,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1757880606, now seen corresponding path program 2 times [2024-06-27 21:09:29,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:29,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323199258] [2024-06-27 21:09:29,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:29,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:29,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:30,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:30,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:30,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323199258] [2024-06-27 21:09:30,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323199258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:30,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:30,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:09:30,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734496450] [2024-06-27 21:09:30,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:30,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:09:30,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:30,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:09:30,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:09:30,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:09:30,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 548 transitions, 8484 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:30,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:30,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:09:30,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:31,484 INFO L124 PetriNetUnfolderBase]: 3154/4819 cut-off events. [2024-06-27 21:09:31,484 INFO L125 PetriNetUnfolderBase]: For 428420/428422 co-relation queries the response was YES. [2024-06-27 21:09:31,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41847 conditions, 4819 events. 3154/4819 cut-off events. For 428420/428422 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 26495 event pairs, 541 based on Foata normal form. 4/4822 useless extension candidates. Maximal degree in co-relation 41678. Up to 4619 conditions per place. [2024-06-27 21:09:31,556 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 531 selfloop transitions, 32 changer transitions 0/567 dead transitions. [2024-06-27 21:09:31,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 567 transitions, 9797 flow [2024-06-27 21:09:31,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:09:31,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:09:31,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 21:09:31,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-27 21:09:31,558 INFO L175 Difference]: Start difference. First operand has 370 places, 548 transitions, 8484 flow. Second operand 7 states and 118 transitions. [2024-06-27 21:09:31,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 567 transitions, 9797 flow [2024-06-27 21:09:34,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 567 transitions, 9502 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 21:09:34,045 INFO L231 Difference]: Finished difference. Result has 373 places, 556 transitions, 8433 flow [2024-06-27 21:09:34,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8189, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8433, PETRI_PLACES=373, PETRI_TRANSITIONS=556} [2024-06-27 21:09:34,045 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 332 predicate places. [2024-06-27 21:09:34,046 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 556 transitions, 8433 flow [2024-06-27 21:09:34,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:34,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:34,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:34,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 21:09:34,046 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:09:34,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:34,047 INFO L85 PathProgramCache]: Analyzing trace with hash -840089115, now seen corresponding path program 24 times [2024-06-27 21:09:34,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:34,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887036412] [2024-06-27 21:09:34,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:34,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:34,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:34,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:34,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:34,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887036412] [2024-06-27 21:09:34,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887036412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:34,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:34,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:09:34,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482094781] [2024-06-27 21:09:34,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:34,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:09:34,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:34,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:09:34,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:09:34,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:09:34,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 556 transitions, 8433 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:34,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:34,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:09:34,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:35,943 INFO L124 PetriNetUnfolderBase]: 3142/4805 cut-off events. [2024-06-27 21:09:35,943 INFO L125 PetriNetUnfolderBase]: For 430482/430484 co-relation queries the response was YES. [2024-06-27 21:09:35,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41525 conditions, 4805 events. 3142/4805 cut-off events. For 430482/430484 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 26449 event pairs, 498 based on Foata normal form. 6/4810 useless extension candidates. Maximal degree in co-relation 41353. Up to 4142 conditions per place. [2024-06-27 21:09:36,016 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 439 selfloop transitions, 139 changer transitions 0/582 dead transitions. [2024-06-27 21:09:36,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 582 transitions, 9934 flow [2024-06-27 21:09:36,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:09:36,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:09:36,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 21:09:36,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465625 [2024-06-27 21:09:36,018 INFO L175 Difference]: Start difference. First operand has 373 places, 556 transitions, 8433 flow. Second operand 8 states and 149 transitions. [2024-06-27 21:09:36,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 582 transitions, 9934 flow [2024-06-27 21:09:38,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 582 transitions, 9789 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-27 21:09:38,233 INFO L231 Difference]: Finished difference. Result has 377 places, 556 transitions, 8574 flow [2024-06-27 21:09:38,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8290, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8574, PETRI_PLACES=377, PETRI_TRANSITIONS=556} [2024-06-27 21:09:38,233 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 336 predicate places. [2024-06-27 21:09:38,234 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 556 transitions, 8574 flow [2024-06-27 21:09:38,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:38,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:38,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:38,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 21:09:38,234 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:09:38,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:38,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1935241619, now seen corresponding path program 25 times [2024-06-27 21:09:38,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:38,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279953116] [2024-06-27 21:09:38,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:38,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:38,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:38,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:38,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:38,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279953116] [2024-06-27 21:09:38,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279953116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:38,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:38,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:09:38,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417189955] [2024-06-27 21:09:38,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:38,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:09:38,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:38,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:09:38,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:09:38,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:09:38,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 556 transitions, 8574 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:38,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:38,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:09:38,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:40,141 INFO L124 PetriNetUnfolderBase]: 3162/4835 cut-off events. [2024-06-27 21:09:40,141 INFO L125 PetriNetUnfolderBase]: For 433250/433252 co-relation queries the response was YES. [2024-06-27 21:09:40,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42124 conditions, 4835 events. 3162/4835 cut-off events. For 433250/433252 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 26624 event pairs, 514 based on Foata normal form. 6/4840 useless extension candidates. Maximal degree in co-relation 41952. Up to 4532 conditions per place. [2024-06-27 21:09:40,214 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 528 selfloop transitions, 44 changer transitions 0/576 dead transitions. [2024-06-27 21:09:40,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 576 transitions, 10093 flow [2024-06-27 21:09:40,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:09:40,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:09:40,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 21:09:40,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 21:09:40,215 INFO L175 Difference]: Start difference. First operand has 377 places, 556 transitions, 8574 flow. Second operand 8 states and 136 transitions. [2024-06-27 21:09:40,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 576 transitions, 10093 flow [2024-06-27 21:09:42,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 576 transitions, 9617 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 21:09:42,063 INFO L231 Difference]: Finished difference. Result has 378 places, 559 transitions, 8279 flow [2024-06-27 21:09:42,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8110, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8279, PETRI_PLACES=378, PETRI_TRANSITIONS=559} [2024-06-27 21:09:42,064 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 337 predicate places. [2024-06-27 21:09:42,064 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 559 transitions, 8279 flow [2024-06-27 21:09:42,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:42,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:42,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:42,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 21:09:42,065 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:09:42,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:42,065 INFO L85 PathProgramCache]: Analyzing trace with hash -2103016630, now seen corresponding path program 3 times [2024-06-27 21:09:42,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:42,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658466494] [2024-06-27 21:09:42,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:42,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:42,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:42,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:42,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:42,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658466494] [2024-06-27 21:09:42,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658466494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:42,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:42,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:09:42,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972748561] [2024-06-27 21:09:42,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:42,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:09:42,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:42,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:09:42,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:09:43,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:09:43,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 559 transitions, 8279 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:43,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:43,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:09:43,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:44,256 INFO L124 PetriNetUnfolderBase]: 3164/4837 cut-off events. [2024-06-27 21:09:44,256 INFO L125 PetriNetUnfolderBase]: For 430150/430150 co-relation queries the response was YES. [2024-06-27 21:09:44,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41318 conditions, 4837 events. 3164/4837 cut-off events. For 430150/430150 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 26616 event pairs, 513 based on Foata normal form. 2/4838 useless extension candidates. Maximal degree in co-relation 41146. Up to 4513 conditions per place. [2024-06-27 21:09:44,320 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 505 selfloop transitions, 71 changer transitions 0/580 dead transitions. [2024-06-27 21:09:44,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 580 transitions, 9855 flow [2024-06-27 21:09:44,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:09:44,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:09:44,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 21:09:44,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392857142857143 [2024-06-27 21:09:44,322 INFO L175 Difference]: Start difference. First operand has 378 places, 559 transitions, 8279 flow. Second operand 7 states and 123 transitions. [2024-06-27 21:09:44,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 580 transitions, 9855 flow [2024-06-27 21:09:47,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 580 transitions, 9427 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-27 21:09:47,096 INFO L231 Difference]: Finished difference. Result has 377 places, 565 transitions, 8169 flow [2024-06-27 21:09:47,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7851, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8169, PETRI_PLACES=377, PETRI_TRANSITIONS=565} [2024-06-27 21:09:47,097 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 336 predicate places. [2024-06-27 21:09:47,097 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 565 transitions, 8169 flow [2024-06-27 21:09:47,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:47,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:47,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:47,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 21:09:47,098 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:09:47,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:47,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1935004469, now seen corresponding path program 26 times [2024-06-27 21:09:47,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:47,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820918029] [2024-06-27 21:09:47,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:47,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:47,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:47,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:47,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:47,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820918029] [2024-06-27 21:09:47,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820918029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:47,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:47,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:09:47,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519186813] [2024-06-27 21:09:47,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:47,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:09:47,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:47,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:09:47,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:09:47,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:09:47,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 565 transitions, 8169 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:47,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:47,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:09:47,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:49,110 INFO L124 PetriNetUnfolderBase]: 3184/4862 cut-off events. [2024-06-27 21:09:49,111 INFO L125 PetriNetUnfolderBase]: For 445855/445857 co-relation queries the response was YES. [2024-06-27 21:09:49,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41260 conditions, 4862 events. 3184/4862 cut-off events. For 445855/445857 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 26698 event pairs, 533 based on Foata normal form. 6/4867 useless extension candidates. Maximal degree in co-relation 41088. Up to 4551 conditions per place. [2024-06-27 21:09:49,321 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 537 selfloop transitions, 44 changer transitions 0/585 dead transitions. [2024-06-27 21:09:49,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 585 transitions, 9677 flow [2024-06-27 21:09:49,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:09:49,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:09:49,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 21:09:49,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-27 21:09:49,322 INFO L175 Difference]: Start difference. First operand has 377 places, 565 transitions, 8169 flow. Second operand 8 states and 137 transitions. [2024-06-27 21:09:49,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 585 transitions, 9677 flow [2024-06-27 21:09:51,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 585 transitions, 9557 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-27 21:09:51,015 INFO L231 Difference]: Finished difference. Result has 381 places, 568 transitions, 8199 flow [2024-06-27 21:09:51,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8051, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8199, PETRI_PLACES=381, PETRI_TRANSITIONS=568} [2024-06-27 21:09:51,016 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 340 predicate places. [2024-06-27 21:09:51,016 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 568 transitions, 8199 flow [2024-06-27 21:09:51,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:51,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:51,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:51,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 21:09:51,016 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:09:51,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:51,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1757752793, now seen corresponding path program 4 times [2024-06-27 21:09:51,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:51,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787063375] [2024-06-27 21:09:51,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:51,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:51,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:51,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:51,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:51,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787063375] [2024-06-27 21:09:51,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787063375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:51,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:51,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:09:51,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896821651] [2024-06-27 21:09:51,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:51,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:09:51,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:51,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:09:51,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:09:51,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:09:51,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 568 transitions, 8199 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:51,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:51,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:09:51,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:53,231 INFO L124 PetriNetUnfolderBase]: 3178/4853 cut-off events. [2024-06-27 21:09:53,232 INFO L125 PetriNetUnfolderBase]: For 430618/430618 co-relation queries the response was YES. [2024-06-27 21:09:53,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41048 conditions, 4853 events. 3178/4853 cut-off events. For 430618/430618 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 26638 event pairs, 537 based on Foata normal form. 2/4854 useless extension candidates. Maximal degree in co-relation 40875. Up to 4617 conditions per place. [2024-06-27 21:09:53,304 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 530 selfloop transitions, 46 changer transitions 0/580 dead transitions. [2024-06-27 21:09:53,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 580 transitions, 9391 flow [2024-06-27 21:09:53,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:09:53,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:09:53,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 21:09:53,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-27 21:09:53,305 INFO L175 Difference]: Start difference. First operand has 381 places, 568 transitions, 8199 flow. Second operand 8 states and 133 transitions. [2024-06-27 21:09:53,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 580 transitions, 9391 flow [2024-06-27 21:09:56,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 580 transitions, 9254 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-27 21:09:56,016 INFO L231 Difference]: Finished difference. Result has 384 places, 568 transitions, 8160 flow [2024-06-27 21:09:56,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8062, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8160, PETRI_PLACES=384, PETRI_TRANSITIONS=568} [2024-06-27 21:09:56,016 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 343 predicate places. [2024-06-27 21:09:56,016 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 568 transitions, 8160 flow [2024-06-27 21:09:56,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:56,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:56,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:56,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 21:09:56,017 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:09:56,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:56,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1757872949, now seen corresponding path program 27 times [2024-06-27 21:09:56,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:56,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952085634] [2024-06-27 21:09:56,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:56,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:56,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:56,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:56,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:56,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952085634] [2024-06-27 21:09:56,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952085634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:56,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:56,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:09:56,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037192458] [2024-06-27 21:09:56,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:56,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:09:56,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:56,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:09:56,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:09:56,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:09:56,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 568 transitions, 8160 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:56,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:56,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:09:56,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:57,943 INFO L124 PetriNetUnfolderBase]: 3166/4836 cut-off events. [2024-06-27 21:09:57,943 INFO L125 PetriNetUnfolderBase]: For 431691/431693 co-relation queries the response was YES. [2024-06-27 21:09:57,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40504 conditions, 4836 events. 3166/4836 cut-off events. For 431691/431693 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 26550 event pairs, 538 based on Foata normal form. 6/4841 useless extension candidates. Maximal degree in co-relation 40330. Up to 4635 conditions per place. [2024-06-27 21:09:58,015 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 552 selfloop transitions, 26 changer transitions 0/582 dead transitions. [2024-06-27 21:09:58,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 582 transitions, 9404 flow [2024-06-27 21:09:58,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:09:58,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:09:58,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 21:09:58,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409375 [2024-06-27 21:09:58,016 INFO L175 Difference]: Start difference. First operand has 384 places, 568 transitions, 8160 flow. Second operand 8 states and 131 transitions. [2024-06-27 21:09:58,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 582 transitions, 9404 flow [2024-06-27 21:10:00,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 582 transitions, 9211 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-27 21:10:00,465 INFO L231 Difference]: Finished difference. Result has 385 places, 568 transitions, 8025 flow [2024-06-27 21:10:00,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7967, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8025, PETRI_PLACES=385, PETRI_TRANSITIONS=568} [2024-06-27 21:10:00,465 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 344 predicate places. [2024-06-27 21:10:00,466 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 568 transitions, 8025 flow [2024-06-27 21:10:00,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:00,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:00,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:00,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 21:10:00,466 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:00,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:00,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1777694097, now seen corresponding path program 4 times [2024-06-27 21:10:00,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:00,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190214387] [2024-06-27 21:10:00,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:00,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:00,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:01,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:01,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:01,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190214387] [2024-06-27 21:10:01,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190214387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:01,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:01,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:10:01,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520879386] [2024-06-27 21:10:01,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:01,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:10:01,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:01,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:10:01,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:10:01,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:10:01,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 568 transitions, 8025 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:01,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:01,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:10:01,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:02,551 INFO L124 PetriNetUnfolderBase]: 3168/4838 cut-off events. [2024-06-27 21:10:02,551 INFO L125 PetriNetUnfolderBase]: For 428033/428033 co-relation queries the response was YES. [2024-06-27 21:10:02,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40398 conditions, 4838 events. 3168/4838 cut-off events. For 428033/428033 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 26548 event pairs, 539 based on Foata normal form. 2/4839 useless extension candidates. Maximal degree in co-relation 40223. Up to 4452 conditions per place. [2024-06-27 21:10:02,625 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 496 selfloop transitions, 85 changer transitions 0/585 dead transitions. [2024-06-27 21:10:02,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 585 transitions, 9301 flow [2024-06-27 21:10:02,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:10:02,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:10:02,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-27 21:10:02,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-27 21:10:02,626 INFO L175 Difference]: Start difference. First operand has 385 places, 568 transitions, 8025 flow. Second operand 6 states and 114 transitions. [2024-06-27 21:10:02,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 585 transitions, 9301 flow [2024-06-27 21:10:05,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 585 transitions, 9082 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-06-27 21:10:05,363 INFO L231 Difference]: Finished difference. Result has 382 places, 571 transitions, 8112 flow [2024-06-27 21:10:05,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7806, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8112, PETRI_PLACES=382, PETRI_TRANSITIONS=571} [2024-06-27 21:10:05,363 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 341 predicate places. [2024-06-27 21:10:05,363 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 571 transitions, 8112 flow [2024-06-27 21:10:05,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:05,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:05,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:05,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 21:10:05,364 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:05,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:05,364 INFO L85 PathProgramCache]: Analyzing trace with hash 2017869159, now seen corresponding path program 1 times [2024-06-27 21:10:05,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:05,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171915608] [2024-06-27 21:10:05,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:05,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:05,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:06,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:06,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:06,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171915608] [2024-06-27 21:10:06,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171915608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:06,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:06,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:10:06,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406488726] [2024-06-27 21:10:06,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:06,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:10:06,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:06,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:10:06,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:10:06,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:10:06,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 571 transitions, 8112 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:06,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:06,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:10:06,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:07,669 INFO L124 PetriNetUnfolderBase]: 3255/4967 cut-off events. [2024-06-27 21:10:07,669 INFO L125 PetriNetUnfolderBase]: For 500683/500683 co-relation queries the response was YES. [2024-06-27 21:10:07,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42412 conditions, 4967 events. 3255/4967 cut-off events. For 500683/500683 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 27350 event pairs, 495 based on Foata normal form. 8/4974 useless extension candidates. Maximal degree in co-relation 42237. Up to 4413 conditions per place. [2024-06-27 21:10:07,745 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 529 selfloop transitions, 88 changer transitions 0/621 dead transitions. [2024-06-27 21:10:07,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 621 transitions, 9832 flow [2024-06-27 21:10:07,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:10:07,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:10:07,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-27 21:10:07,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455 [2024-06-27 21:10:07,747 INFO L175 Difference]: Start difference. First operand has 382 places, 571 transitions, 8112 flow. Second operand 10 states and 182 transitions. [2024-06-27 21:10:07,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 621 transitions, 9832 flow [2024-06-27 21:10:10,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 621 transitions, 9666 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 21:10:10,513 INFO L231 Difference]: Finished difference. Result has 390 places, 576 transitions, 8237 flow [2024-06-27 21:10:10,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7946, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8237, PETRI_PLACES=390, PETRI_TRANSITIONS=576} [2024-06-27 21:10:10,514 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 349 predicate places. [2024-06-27 21:10:10,514 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 576 transitions, 8237 flow [2024-06-27 21:10:10,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:10,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:10,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:10,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 21:10:10,514 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:10,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:10,515 INFO L85 PathProgramCache]: Analyzing trace with hash 2019746829, now seen corresponding path program 2 times [2024-06-27 21:10:10,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:10,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356572989] [2024-06-27 21:10:10,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:10,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:10,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:11,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:11,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:11,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356572989] [2024-06-27 21:10:11,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356572989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:11,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:11,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:10:11,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779669888] [2024-06-27 21:10:11,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:11,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:10:11,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:11,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:10:11,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:10:11,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:10:11,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 576 transitions, 8237 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:11,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:11,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:10:11,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:12,989 INFO L124 PetriNetUnfolderBase]: 3299/5042 cut-off events. [2024-06-27 21:10:12,990 INFO L125 PetriNetUnfolderBase]: For 527901/527901 co-relation queries the response was YES. [2024-06-27 21:10:13,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43248 conditions, 5042 events. 3299/5042 cut-off events. For 527901/527901 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 27904 event pairs, 504 based on Foata normal form. 12/5053 useless extension candidates. Maximal degree in co-relation 43070. Up to 4653 conditions per place. [2024-06-27 21:10:13,069 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 520 selfloop transitions, 89 changer transitions 0/613 dead transitions. [2024-06-27 21:10:13,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 613 transitions, 9659 flow [2024-06-27 21:10:13,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:10:13,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:10:13,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 202 transitions. [2024-06-27 21:10:13,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42083333333333334 [2024-06-27 21:10:13,071 INFO L175 Difference]: Start difference. First operand has 390 places, 576 transitions, 8237 flow. Second operand 12 states and 202 transitions. [2024-06-27 21:10:13,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 613 transitions, 9659 flow [2024-06-27 21:10:15,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 613 transitions, 9532 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 21:10:15,403 INFO L231 Difference]: Finished difference. Result has 397 places, 577 transitions, 8321 flow [2024-06-27 21:10:15,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8110, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8321, PETRI_PLACES=397, PETRI_TRANSITIONS=577} [2024-06-27 21:10:15,403 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 356 predicate places. [2024-06-27 21:10:15,403 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 577 transitions, 8321 flow [2024-06-27 21:10:15,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:15,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:15,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:15,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 21:10:15,404 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:15,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:15,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1635581151, now seen corresponding path program 3 times [2024-06-27 21:10:15,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:15,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887152051] [2024-06-27 21:10:15,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:15,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:15,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:16,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:16,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:16,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887152051] [2024-06-27 21:10:16,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887152051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:16,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:16,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:10:16,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437071911] [2024-06-27 21:10:16,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:16,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:10:16,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:16,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:10:16,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:10:16,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:10:16,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 577 transitions, 8321 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:16,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:16,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:10:16,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:17,781 INFO L124 PetriNetUnfolderBase]: 3327/5084 cut-off events. [2024-06-27 21:10:17,781 INFO L125 PetriNetUnfolderBase]: For 523292/523292 co-relation queries the response was YES. [2024-06-27 21:10:17,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43905 conditions, 5084 events. 3327/5084 cut-off events. For 523292/523292 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 28226 event pairs, 508 based on Foata normal form. 8/5091 useless extension candidates. Maximal degree in co-relation 43725. Up to 4649 conditions per place. [2024-06-27 21:10:17,859 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 526 selfloop transitions, 90 changer transitions 0/620 dead transitions. [2024-06-27 21:10:17,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 620 transitions, 9830 flow [2024-06-27 21:10:17,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:10:17,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:10:17,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 194 transitions. [2024-06-27 21:10:17,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2024-06-27 21:10:17,861 INFO L175 Difference]: Start difference. First operand has 397 places, 577 transitions, 8321 flow. Second operand 11 states and 194 transitions. [2024-06-27 21:10:17,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 620 transitions, 9830 flow [2024-06-27 21:10:20,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 620 transitions, 9658 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-27 21:10:20,912 INFO L231 Difference]: Finished difference. Result has 400 places, 581 transitions, 8413 flow [2024-06-27 21:10:20,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8149, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8413, PETRI_PLACES=400, PETRI_TRANSITIONS=581} [2024-06-27 21:10:20,913 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 359 predicate places. [2024-06-27 21:10:20,913 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 581 transitions, 8413 flow [2024-06-27 21:10:20,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:20,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:20,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:20,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 21:10:20,913 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:20,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:20,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1385647715, now seen corresponding path program 1 times [2024-06-27 21:10:20,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:20,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783339836] [2024-06-27 21:10:20,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:20,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:20,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:21,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:21,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:21,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783339836] [2024-06-27 21:10:21,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783339836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:21,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:21,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:10:21,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357716887] [2024-06-27 21:10:21,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:21,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:10:21,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:21,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:10:21,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:10:21,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:10:21,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 581 transitions, 8413 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:21,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:21,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:10:21,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:23,222 INFO L124 PetriNetUnfolderBase]: 3335/5098 cut-off events. [2024-06-27 21:10:23,222 INFO L125 PetriNetUnfolderBase]: For 509750/509750 co-relation queries the response was YES. [2024-06-27 21:10:23,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44192 conditions, 5098 events. 3335/5098 cut-off events. For 509750/509750 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 28331 event pairs, 524 based on Foata normal form. 2/5099 useless extension candidates. Maximal degree in co-relation 44010. Up to 4899 conditions per place. [2024-06-27 21:10:23,301 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 566 selfloop transitions, 34 changer transitions 0/604 dead transitions. [2024-06-27 21:10:23,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 604 transitions, 9741 flow [2024-06-27 21:10:23,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:10:23,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:10:23,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 21:10:23,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 21:10:23,303 INFO L175 Difference]: Start difference. First operand has 400 places, 581 transitions, 8413 flow. Second operand 9 states and 150 transitions. [2024-06-27 21:10:23,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 604 transitions, 9741 flow [2024-06-27 21:10:26,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 604 transitions, 9616 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 21:10:26,306 INFO L231 Difference]: Finished difference. Result has 402 places, 583 transitions, 8408 flow [2024-06-27 21:10:26,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8288, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8408, PETRI_PLACES=402, PETRI_TRANSITIONS=583} [2024-06-27 21:10:26,307 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 361 predicate places. [2024-06-27 21:10:26,307 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 583 transitions, 8408 flow [2024-06-27 21:10:26,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:26,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:26,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:26,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 21:10:26,307 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:26,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:26,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1385641763, now seen corresponding path program 4 times [2024-06-27 21:10:26,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:26,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557956473] [2024-06-27 21:10:26,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:26,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:26,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:27,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:27,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:27,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557956473] [2024-06-27 21:10:27,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557956473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:27,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:27,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:10:27,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011463913] [2024-06-27 21:10:27,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:27,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:10:27,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:27,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:10:27,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:10:27,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:10:27,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 583 transitions, 8408 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:27,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:27,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:10:27,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:28,778 INFO L124 PetriNetUnfolderBase]: 3381/5166 cut-off events. [2024-06-27 21:10:28,779 INFO L125 PetriNetUnfolderBase]: For 554323/554323 co-relation queries the response was YES. [2024-06-27 21:10:28,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44918 conditions, 5166 events. 3381/5166 cut-off events. For 554323/554323 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 28764 event pairs, 534 based on Foata normal form. 10/5175 useless extension candidates. Maximal degree in co-relation 44734. Up to 4915 conditions per place. [2024-06-27 21:10:28,861 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 573 selfloop transitions, 37 changer transitions 0/614 dead transitions. [2024-06-27 21:10:28,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 614 transitions, 9832 flow [2024-06-27 21:10:28,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:10:28,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:10:28,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-27 21:10:28,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42 [2024-06-27 21:10:28,863 INFO L175 Difference]: Start difference. First operand has 402 places, 583 transitions, 8408 flow. Second operand 10 states and 168 transitions. [2024-06-27 21:10:28,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 614 transitions, 9832 flow [2024-06-27 21:10:32,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 614 transitions, 9744 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 21:10:32,068 INFO L231 Difference]: Finished difference. Result has 407 places, 587 transitions, 8472 flow [2024-06-27 21:10:32,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8320, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8472, PETRI_PLACES=407, PETRI_TRANSITIONS=587} [2024-06-27 21:10:32,069 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 366 predicate places. [2024-06-27 21:10:32,069 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 587 transitions, 8472 flow [2024-06-27 21:10:32,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:32,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:32,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:32,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 21:10:32,069 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:32,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:32,070 INFO L85 PathProgramCache]: Analyzing trace with hash 2025136929, now seen corresponding path program 5 times [2024-06-27 21:10:32,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:32,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639904306] [2024-06-27 21:10:32,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:32,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:32,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:32,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:32,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:32,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639904306] [2024-06-27 21:10:32,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639904306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:32,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:32,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:10:32,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680143916] [2024-06-27 21:10:32,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:32,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:10:32,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:32,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:10:32,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:10:33,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:10:33,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 587 transitions, 8472 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:33,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:33,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:10:33,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:34,494 INFO L124 PetriNetUnfolderBase]: 3481/5320 cut-off events. [2024-06-27 21:10:34,495 INFO L125 PetriNetUnfolderBase]: For 612500/612500 co-relation queries the response was YES. [2024-06-27 21:10:34,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47478 conditions, 5320 events. 3481/5320 cut-off events. For 612500/612500 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 29754 event pairs, 536 based on Foata normal form. 8/5327 useless extension candidates. Maximal degree in co-relation 47292. Up to 4926 conditions per place. [2024-06-27 21:10:34,587 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 571 selfloop transitions, 47 changer transitions 0/622 dead transitions. [2024-06-27 21:10:34,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 622 transitions, 10154 flow [2024-06-27 21:10:34,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:10:34,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:10:34,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-27 21:10:34,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43 [2024-06-27 21:10:34,589 INFO L175 Difference]: Start difference. First operand has 407 places, 587 transitions, 8472 flow. Second operand 10 states and 172 transitions. [2024-06-27 21:10:34,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 622 transitions, 10154 flow [2024-06-27 21:10:37,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 622 transitions, 10064 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 21:10:37,582 INFO L231 Difference]: Finished difference. Result has 410 places, 590 transitions, 8562 flow [2024-06-27 21:10:37,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8382, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8562, PETRI_PLACES=410, PETRI_TRANSITIONS=590} [2024-06-27 21:10:37,583 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 369 predicate places. [2024-06-27 21:10:37,583 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 590 transitions, 8562 flow [2024-06-27 21:10:37,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:37,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:37,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:37,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 21:10:37,584 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:37,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:37,584 INFO L85 PathProgramCache]: Analyzing trace with hash 2025140649, now seen corresponding path program 6 times [2024-06-27 21:10:37,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:37,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142808643] [2024-06-27 21:10:37,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:37,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:37,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:38,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:38,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:38,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142808643] [2024-06-27 21:10:38,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142808643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:38,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:38,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:10:38,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689509906] [2024-06-27 21:10:38,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:38,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:10:38,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:38,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:10:38,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:10:38,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:10:38,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 590 transitions, 8562 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:38,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:38,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:10:38,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:40,101 INFO L124 PetriNetUnfolderBase]: 3517/5374 cut-off events. [2024-06-27 21:10:40,101 INFO L125 PetriNetUnfolderBase]: For 634966/634966 co-relation queries the response was YES. [2024-06-27 21:10:40,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48218 conditions, 5374 events. 3517/5374 cut-off events. For 634966/634966 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 30149 event pairs, 554 based on Foata normal form. 10/5383 useless extension candidates. Maximal degree in co-relation 48030. Up to 5064 conditions per place. [2024-06-27 21:10:40,187 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 569 selfloop transitions, 47 changer transitions 0/620 dead transitions. [2024-06-27 21:10:40,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 620 transitions, 9981 flow [2024-06-27 21:10:40,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:10:40,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:10:40,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 183 transitions. [2024-06-27 21:10:40,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4159090909090909 [2024-06-27 21:10:40,188 INFO L175 Difference]: Start difference. First operand has 410 places, 590 transitions, 8562 flow. Second operand 11 states and 183 transitions. [2024-06-27 21:10:40,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 620 transitions, 9981 flow [2024-06-27 21:10:42,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 620 transitions, 9909 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 21:10:42,952 INFO L231 Difference]: Finished difference. Result has 415 places, 591 transitions, 8628 flow [2024-06-27 21:10:42,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8492, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8628, PETRI_PLACES=415, PETRI_TRANSITIONS=591} [2024-06-27 21:10:42,953 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 374 predicate places. [2024-06-27 21:10:42,953 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 591 transitions, 8628 flow [2024-06-27 21:10:42,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:42,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:42,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:42,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 21:10:42,954 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:42,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:42,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1391211905, now seen corresponding path program 2 times [2024-06-27 21:10:42,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:42,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325288255] [2024-06-27 21:10:42,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:42,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:42,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:43,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:43,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:43,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325288255] [2024-06-27 21:10:43,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325288255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:43,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:43,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:10:43,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626030047] [2024-06-27 21:10:43,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:43,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:10:43,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:43,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:10:43,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:10:44,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:10:44,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 591 transitions, 8628 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:44,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:44,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:10:44,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:45,662 INFO L124 PetriNetUnfolderBase]: 3512/5367 cut-off events. [2024-06-27 21:10:45,662 INFO L125 PetriNetUnfolderBase]: For 601550/601550 co-relation queries the response was YES. [2024-06-27 21:10:45,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48135 conditions, 5367 events. 3512/5367 cut-off events. For 601550/601550 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 30182 event pairs, 567 based on Foata normal form. 2/5368 useless extension candidates. Maximal degree in co-relation 47945. Up to 5170 conditions per place. [2024-06-27 21:10:45,749 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 577 selfloop transitions, 35 changer transitions 0/616 dead transitions. [2024-06-27 21:10:45,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 616 transitions, 9993 flow [2024-06-27 21:10:45,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:10:45,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:10:45,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 174 transitions. [2024-06-27 21:10:45,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39545454545454545 [2024-06-27 21:10:45,756 INFO L175 Difference]: Start difference. First operand has 415 places, 591 transitions, 8628 flow. Second operand 11 states and 174 transitions. [2024-06-27 21:10:45,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 616 transitions, 9993 flow [2024-06-27 21:10:49,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 616 transitions, 9897 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-27 21:10:49,612 INFO L231 Difference]: Finished difference. Result has 417 places, 593 transitions, 8663 flow [2024-06-27 21:10:49,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8532, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8663, PETRI_PLACES=417, PETRI_TRANSITIONS=593} [2024-06-27 21:10:49,613 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 376 predicate places. [2024-06-27 21:10:49,613 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 593 transitions, 8663 flow [2024-06-27 21:10:49,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:49,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:49,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:49,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 21:10:49,617 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:49,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:49,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1391219345, now seen corresponding path program 3 times [2024-06-27 21:10:49,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:49,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122995029] [2024-06-27 21:10:49,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:49,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:49,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:50,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:50,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:50,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122995029] [2024-06-27 21:10:50,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122995029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:50,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:50,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:10:50,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391408746] [2024-06-27 21:10:50,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:50,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:10:50,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:50,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:10:50,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:10:50,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:10:50,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 593 transitions, 8663 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:50,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:50,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:10:50,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:52,106 INFO L124 PetriNetUnfolderBase]: 3520/5379 cut-off events. [2024-06-27 21:10:52,106 INFO L125 PetriNetUnfolderBase]: For 613272/613272 co-relation queries the response was YES. [2024-06-27 21:10:52,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48320 conditions, 5379 events. 3520/5379 cut-off events. For 613272/613272 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 30239 event pairs, 557 based on Foata normal form. 2/5380 useless extension candidates. Maximal degree in co-relation 48129. Up to 5162 conditions per place. [2024-06-27 21:10:52,194 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 573 selfloop transitions, 41 changer transitions 0/618 dead transitions. [2024-06-27 21:10:52,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 618 transitions, 10016 flow [2024-06-27 21:10:52,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:10:52,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:10:52,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 174 transitions. [2024-06-27 21:10:52,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39545454545454545 [2024-06-27 21:10:52,196 INFO L175 Difference]: Start difference. First operand has 417 places, 593 transitions, 8663 flow. Second operand 11 states and 174 transitions. [2024-06-27 21:10:52,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 618 transitions, 10016 flow [2024-06-27 21:10:54,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 618 transitions, 9911 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-27 21:10:54,845 INFO L231 Difference]: Finished difference. Result has 420 places, 595 transitions, 8691 flow [2024-06-27 21:10:54,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8558, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8691, PETRI_PLACES=420, PETRI_TRANSITIONS=595} [2024-06-27 21:10:54,845 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 379 predicate places. [2024-06-27 21:10:54,845 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 595 transitions, 8691 flow [2024-06-27 21:10:54,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:54,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:54,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:54,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 21:10:54,846 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:54,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:54,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1391004143, now seen corresponding path program 7 times [2024-06-27 21:10:54,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:54,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115890806] [2024-06-27 21:10:54,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:54,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:54,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:55,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:55,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:55,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115890806] [2024-06-27 21:10:55,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115890806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:55,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:55,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:10:55,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615199675] [2024-06-27 21:10:55,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:55,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:10:55,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:55,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:10:55,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:10:55,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:10:55,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 595 transitions, 8691 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:55,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:55,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:10:55,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:57,377 INFO L124 PetriNetUnfolderBase]: 3497/5346 cut-off events. [2024-06-27 21:10:57,377 INFO L125 PetriNetUnfolderBase]: For 614704/614704 co-relation queries the response was YES. [2024-06-27 21:10:57,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47253 conditions, 5346 events. 3497/5346 cut-off events. For 614704/614704 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 30043 event pairs, 558 based on Foata normal form. 10/5355 useless extension candidates. Maximal degree in co-relation 47061. Up to 5095 conditions per place. [2024-06-27 21:10:57,463 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 583 selfloop transitions, 38 changer transitions 0/625 dead transitions. [2024-06-27 21:10:57,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 625 transitions, 10116 flow [2024-06-27 21:10:57,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:10:57,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:10:57,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 192 transitions. [2024-06-27 21:10:57,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 21:10:57,465 INFO L175 Difference]: Start difference. First operand has 420 places, 595 transitions, 8691 flow. Second operand 12 states and 192 transitions. [2024-06-27 21:10:57,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 625 transitions, 10116 flow [2024-06-27 21:11:00,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 625 transitions, 9983 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-27 21:11:00,203 INFO L231 Difference]: Finished difference. Result has 424 places, 596 transitions, 8677 flow [2024-06-27 21:11:00,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8568, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8677, PETRI_PLACES=424, PETRI_TRANSITIONS=596} [2024-06-27 21:11:00,203 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 383 predicate places. [2024-06-27 21:11:00,203 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 596 transitions, 8677 flow [2024-06-27 21:11:00,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:00,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:00,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:11:00,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 21:11:00,204 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:11:00,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:00,204 INFO L85 PathProgramCache]: Analyzing trace with hash -840074235, now seen corresponding path program 4 times [2024-06-27 21:11:00,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:00,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878166163] [2024-06-27 21:11:00,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:00,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:00,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:01,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:01,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:01,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878166163] [2024-06-27 21:11:01,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878166163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:01,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:01,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:11:01,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864864741] [2024-06-27 21:11:01,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:01,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:11:01,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:01,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:11:01,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:11:01,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:11:01,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 596 transitions, 8677 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:01,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:01,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:11:01,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:02,517 INFO L124 PetriNetUnfolderBase]: 3505/5358 cut-off events. [2024-06-27 21:11:02,517 INFO L125 PetriNetUnfolderBase]: For 588421/588421 co-relation queries the response was YES. [2024-06-27 21:11:02,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47331 conditions, 5358 events. 3505/5358 cut-off events. For 588421/588421 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 30192 event pairs, 594 based on Foata normal form. 2/5359 useless extension candidates. Maximal degree in co-relation 47138. Up to 5153 conditions per place. [2024-06-27 21:11:02,603 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 582 selfloop transitions, 34 changer transitions 0/620 dead transitions. [2024-06-27 21:11:02,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 620 transitions, 10047 flow [2024-06-27 21:11:02,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:11:02,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:11:02,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 21:11:02,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-27 21:11:02,604 INFO L175 Difference]: Start difference. First operand has 424 places, 596 transitions, 8677 flow. Second operand 8 states and 139 transitions. [2024-06-27 21:11:02,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 620 transitions, 10047 flow [2024-06-27 21:11:05,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 620 transitions, 9970 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-27 21:11:05,893 INFO L231 Difference]: Finished difference. Result has 422 places, 598 transitions, 8732 flow [2024-06-27 21:11:05,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8600, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8732, PETRI_PLACES=422, PETRI_TRANSITIONS=598} [2024-06-27 21:11:05,893 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 381 predicate places. [2024-06-27 21:11:05,893 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 598 transitions, 8732 flow [2024-06-27 21:11:05,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:05,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:05,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:11:05,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 21:11:05,894 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:11:05,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:05,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1935458309, now seen corresponding path program 5 times [2024-06-27 21:11:05,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:05,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474772632] [2024-06-27 21:11:05,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:05,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:05,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:06,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:06,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:06,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474772632] [2024-06-27 21:11:06,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474772632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:06,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:06,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:11:06,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142693708] [2024-06-27 21:11:06,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:06,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:11:06,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:06,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:11:06,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:11:06,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:11:06,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 598 transitions, 8732 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:06,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:06,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:11:06,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:08,063 INFO L124 PetriNetUnfolderBase]: 3513/5372 cut-off events. [2024-06-27 21:11:08,064 INFO L125 PetriNetUnfolderBase]: For 600405/600405 co-relation queries the response was YES. [2024-06-27 21:11:08,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47644 conditions, 5372 events. 3513/5372 cut-off events. For 600405/600405 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 30324 event pairs, 597 based on Foata normal form. 2/5373 useless extension candidates. Maximal degree in co-relation 47450. Up to 5209 conditions per place. [2024-06-27 21:11:08,151 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 594 selfloop transitions, 17 changer transitions 0/615 dead transitions. [2024-06-27 21:11:08,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 615 transitions, 10072 flow [2024-06-27 21:11:08,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:11:08,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:11:08,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 21:11:08,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-27 21:11:08,153 INFO L175 Difference]: Start difference. First operand has 422 places, 598 transitions, 8732 flow. Second operand 8 states and 127 transitions. [2024-06-27 21:11:08,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 615 transitions, 10072 flow [2024-06-27 21:11:11,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 615 transitions, 9959 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 21:11:11,783 INFO L231 Difference]: Finished difference. Result has 424 places, 600 transitions, 8721 flow [2024-06-27 21:11:11,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8619, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8721, PETRI_PLACES=424, PETRI_TRANSITIONS=600} [2024-06-27 21:11:11,784 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 383 predicate places. [2024-06-27 21:11:11,784 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 600 transitions, 8721 flow [2024-06-27 21:11:11,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:11,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:11,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:11:11,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 21:11:11,784 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:11:11,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:11,785 INFO L85 PathProgramCache]: Analyzing trace with hash -2103008477, now seen corresponding path program 6 times [2024-06-27 21:11:11,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:11,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503040530] [2024-06-27 21:11:11,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:11,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:11,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:12,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:12,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:12,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503040530] [2024-06-27 21:11:12,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503040530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:12,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:12,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:11:12,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646693331] [2024-06-27 21:11:12,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:12,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:11:12,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:12,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:11:12,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:11:12,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:11:12,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 600 transitions, 8721 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:12,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:12,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:11:12,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:14,120 INFO L124 PetriNetUnfolderBase]: 3521/5382 cut-off events. [2024-06-27 21:11:14,120 INFO L125 PetriNetUnfolderBase]: For 612328/612328 co-relation queries the response was YES. [2024-06-27 21:11:14,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47849 conditions, 5382 events. 3521/5382 cut-off events. For 612328/612328 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 30364 event pairs, 605 based on Foata normal form. 2/5383 useless extension candidates. Maximal degree in co-relation 47654. Up to 5206 conditions per place. [2024-06-27 21:11:14,209 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 586 selfloop transitions, 27 changer transitions 0/617 dead transitions. [2024-06-27 21:11:14,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 617 transitions, 10056 flow [2024-06-27 21:11:14,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:11:14,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:11:14,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 21:11:14,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 21:11:14,210 INFO L175 Difference]: Start difference. First operand has 424 places, 600 transitions, 8721 flow. Second operand 8 states and 128 transitions. [2024-06-27 21:11:14,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 617 transitions, 10056 flow [2024-06-27 21:11:17,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 617 transitions, 9973 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 21:11:17,559 INFO L231 Difference]: Finished difference. Result has 426 places, 602 transitions, 8754 flow [2024-06-27 21:11:17,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8638, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8754, PETRI_PLACES=426, PETRI_TRANSITIONS=602} [2024-06-27 21:11:17,560 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 385 predicate places. [2024-06-27 21:11:17,560 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 602 transitions, 8754 flow [2024-06-27 21:11:17,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:17,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:17,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:11:17,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 21:11:17,561 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:11:17,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:17,561 INFO L85 PathProgramCache]: Analyzing trace with hash -834510045, now seen corresponding path program 7 times [2024-06-27 21:11:17,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:17,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728739313] [2024-06-27 21:11:17,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:17,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:17,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:18,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:18,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:18,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728739313] [2024-06-27 21:11:18,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728739313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:18,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:18,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:11:18,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047254834] [2024-06-27 21:11:18,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:18,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:11:18,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:18,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:11:18,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:11:18,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:11:18,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 602 transitions, 8754 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:18,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:18,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:11:18,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:20,040 INFO L124 PetriNetUnfolderBase]: 3516/5375 cut-off events. [2024-06-27 21:11:20,040 INFO L125 PetriNetUnfolderBase]: For 613456/613456 co-relation queries the response was YES. [2024-06-27 21:11:20,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47728 conditions, 5375 events. 3516/5375 cut-off events. For 613456/613456 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 30301 event pairs, 595 based on Foata normal form. 2/5376 useless extension candidates. Maximal degree in co-relation 47532. Up to 5170 conditions per place. [2024-06-27 21:11:20,132 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 587 selfloop transitions, 32 changer transitions 0/623 dead transitions. [2024-06-27 21:11:20,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 623 transitions, 10132 flow [2024-06-27 21:11:20,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:11:20,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:11:20,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 21:11:20,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 21:11:20,133 INFO L175 Difference]: Start difference. First operand has 426 places, 602 transitions, 8754 flow. Second operand 8 states and 136 transitions. [2024-06-27 21:11:20,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 623 transitions, 10132 flow [2024-06-27 21:11:23,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 623 transitions, 10042 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 21:11:23,573 INFO L231 Difference]: Finished difference. Result has 428 places, 604 transitions, 8802 flow [2024-06-27 21:11:23,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8664, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8802, PETRI_PLACES=428, PETRI_TRANSITIONS=604} [2024-06-27 21:11:23,574 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 387 predicate places. [2024-06-27 21:11:23,574 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 604 transitions, 8802 flow [2024-06-27 21:11:23,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:23,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:23,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:11:23,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 21:11:23,575 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:11:23,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:23,575 INFO L85 PathProgramCache]: Analyzing trace with hash -834502605, now seen corresponding path program 8 times [2024-06-27 21:11:23,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:23,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640802879] [2024-06-27 21:11:23,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:23,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:23,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:24,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:24,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:24,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640802879] [2024-06-27 21:11:24,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640802879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:24,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:24,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:11:24,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912517691] [2024-06-27 21:11:24,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:24,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:11:24,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:24,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:11:24,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:11:24,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:11:24,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 604 transitions, 8802 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:24,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:24,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:11:24,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:25,975 INFO L124 PetriNetUnfolderBase]: 3524/5389 cut-off events. [2024-06-27 21:11:25,975 INFO L125 PetriNetUnfolderBase]: For 626218/626218 co-relation queries the response was YES. [2024-06-27 21:11:26,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48040 conditions, 5389 events. 3524/5389 cut-off events. For 626218/626218 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 30404 event pairs, 591 based on Foata normal form. 2/5390 useless extension candidates. Maximal degree in co-relation 47843. Up to 5162 conditions per place. [2024-06-27 21:11:26,068 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 584 selfloop transitions, 37 changer transitions 0/625 dead transitions. [2024-06-27 21:11:26,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 625 transitions, 10169 flow [2024-06-27 21:11:26,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:11:26,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:11:26,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 21:11:26,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 21:11:26,069 INFO L175 Difference]: Start difference. First operand has 428 places, 604 transitions, 8802 flow. Second operand 8 states and 136 transitions. [2024-06-27 21:11:26,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 625 transitions, 10169 flow [2024-06-27 21:11:30,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 625 transitions, 10058 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 21:11:30,278 INFO L231 Difference]: Finished difference. Result has 431 places, 606 transitions, 8830 flow [2024-06-27 21:11:30,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8691, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8830, PETRI_PLACES=431, PETRI_TRANSITIONS=606} [2024-06-27 21:11:30,278 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 390 predicate places. [2024-06-27 21:11:30,278 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 606 transitions, 8830 flow [2024-06-27 21:11:30,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:30,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:30,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:11:30,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 21:11:30,279 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:11:30,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:30,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1935250547, now seen corresponding path program 8 times [2024-06-27 21:11:30,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:30,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75403704] [2024-06-27 21:11:30,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:30,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:30,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:31,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:31,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:31,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75403704] [2024-06-27 21:11:31,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75403704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:31,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:31,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:11:31,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338563667] [2024-06-27 21:11:31,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:31,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:11:31,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:31,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:11:31,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:11:31,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:11:31,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 606 transitions, 8830 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:31,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:31,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:11:31,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:32,661 INFO L124 PetriNetUnfolderBase]: 3560/5443 cut-off events. [2024-06-27 21:11:32,662 INFO L125 PetriNetUnfolderBase]: For 681594/681594 co-relation queries the response was YES. [2024-06-27 21:11:32,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48723 conditions, 5443 events. 3560/5443 cut-off events. For 681594/681594 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 30736 event pairs, 610 based on Foata normal form. 10/5452 useless extension candidates. Maximal degree in co-relation 48525. Up to 5228 conditions per place. [2024-06-27 21:11:32,789 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 604 selfloop transitions, 20 changer transitions 0/628 dead transitions. [2024-06-27 21:11:32,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 628 transitions, 10234 flow [2024-06-27 21:11:32,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:11:32,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:11:32,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-27 21:11:32,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2024-06-27 21:11:32,791 INFO L175 Difference]: Start difference. First operand has 431 places, 606 transitions, 8830 flow. Second operand 9 states and 145 transitions. [2024-06-27 21:11:32,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 628 transitions, 10234 flow [2024-06-27 21:11:37,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 628 transitions, 10105 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-27 21:11:37,185 INFO L231 Difference]: Finished difference. Result has 433 places, 607 transitions, 8787 flow [2024-06-27 21:11:37,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8701, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8787, PETRI_PLACES=433, PETRI_TRANSITIONS=607} [2024-06-27 21:11:37,185 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 392 predicate places. [2024-06-27 21:11:37,186 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 607 transitions, 8787 flow [2024-06-27 21:11:37,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:37,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:37,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:11:37,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 21:11:37,186 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:11:37,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:37,187 INFO L85 PathProgramCache]: Analyzing trace with hash -840224337, now seen corresponding path program 9 times [2024-06-27 21:11:37,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:37,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638689748] [2024-06-27 21:11:37,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:37,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:37,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:38,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:38,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:38,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638689748] [2024-06-27 21:11:38,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638689748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:38,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:38,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:11:38,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901106677] [2024-06-27 21:11:38,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:38,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:11:38,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:38,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:11:38,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:11:38,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:11:38,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 607 transitions, 8787 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:38,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:38,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:11:38,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:39,664 INFO L124 PetriNetUnfolderBase]: 3596/5499 cut-off events. [2024-06-27 21:11:39,665 INFO L125 PetriNetUnfolderBase]: For 696767/696767 co-relation queries the response was YES. [2024-06-27 21:11:39,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49313 conditions, 5499 events. 3596/5499 cut-off events. For 696767/696767 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 31146 event pairs, 605 based on Foata normal form. 10/5508 useless extension candidates. Maximal degree in co-relation 49115. Up to 5200 conditions per place. [2024-06-27 21:11:39,753 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 586 selfloop transitions, 51 changer transitions 0/641 dead transitions. [2024-06-27 21:11:39,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 641 transitions, 10261 flow [2024-06-27 21:11:39,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:11:39,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:11:39,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-27 21:11:39,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44 [2024-06-27 21:11:39,754 INFO L175 Difference]: Start difference. First operand has 433 places, 607 transitions, 8787 flow. Second operand 10 states and 176 transitions. [2024-06-27 21:11:39,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 641 transitions, 10261 flow [2024-06-27 21:11:42,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 641 transitions, 10204 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 21:11:42,815 INFO L231 Difference]: Finished difference. Result has 436 places, 608 transitions, 8882 flow [2024-06-27 21:11:42,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8730, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8882, PETRI_PLACES=436, PETRI_TRANSITIONS=608} [2024-06-27 21:11:42,816 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 395 predicate places. [2024-06-27 21:11:42,816 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 608 transitions, 8882 flow [2024-06-27 21:11:42,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:42,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:42,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:11:42,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 21:11:42,816 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:11:42,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:42,817 INFO L85 PathProgramCache]: Analyzing trace with hash -840228057, now seen corresponding path program 10 times [2024-06-27 21:11:42,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:42,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768361474] [2024-06-27 21:11:42,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:42,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:42,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:43,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:43,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:43,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768361474] [2024-06-27 21:11:43,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768361474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:43,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:43,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:11:43,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633048546] [2024-06-27 21:11:43,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:43,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:11:43,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:43,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:11:43,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:11:43,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:11:43,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 608 transitions, 8882 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:43,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:43,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:11:43,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:45,260 INFO L124 PetriNetUnfolderBase]: 3624/5540 cut-off events. [2024-06-27 21:11:45,260 INFO L125 PetriNetUnfolderBase]: For 699999/699999 co-relation queries the response was YES. [2024-06-27 21:11:45,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49848 conditions, 5540 events. 3624/5540 cut-off events. For 699999/699999 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 31396 event pairs, 581 based on Foata normal form. 8/5547 useless extension candidates. Maximal degree in co-relation 49649. Up to 5061 conditions per place. [2024-06-27 21:11:45,352 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 588 selfloop transitions, 56 changer transitions 0/648 dead transitions. [2024-06-27 21:11:45,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 648 transitions, 10617 flow [2024-06-27 21:11:45,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:11:45,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:11:45,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 21:11:45,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46944444444444444 [2024-06-27 21:11:45,353 INFO L175 Difference]: Start difference. First operand has 436 places, 608 transitions, 8882 flow. Second operand 9 states and 169 transitions. [2024-06-27 21:11:45,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 648 transitions, 10617 flow [2024-06-27 21:11:49,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 648 transitions, 10513 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 21:11:49,866 INFO L231 Difference]: Finished difference. Result has 439 places, 610 transitions, 8965 flow [2024-06-27 21:11:49,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8778, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8965, PETRI_PLACES=439, PETRI_TRANSITIONS=610} [2024-06-27 21:11:49,867 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 398 predicate places. [2024-06-27 21:11:49,867 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 610 transitions, 8965 flow [2024-06-27 21:11:49,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:49,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:49,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:11:49,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 21:11:49,868 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:11:49,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:49,868 INFO L85 PathProgramCache]: Analyzing trace with hash -834717807, now seen corresponding path program 11 times [2024-06-27 21:11:49,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:49,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153787728] [2024-06-27 21:11:49,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:49,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:49,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:50,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:50,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:50,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153787728] [2024-06-27 21:11:50,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153787728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:50,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:50,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:11:50,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564474678] [2024-06-27 21:11:50,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:50,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:11:50,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:50,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:11:50,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:11:51,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:11:51,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 610 transitions, 8965 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:51,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:51,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:11:51,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:52,524 INFO L124 PetriNetUnfolderBase]: 3601/5512 cut-off events. [2024-06-27 21:11:52,524 INFO L125 PetriNetUnfolderBase]: For 665430/665430 co-relation queries the response was YES. [2024-06-27 21:11:52,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48579 conditions, 5512 events. 3601/5512 cut-off events. For 665430/665430 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 31302 event pairs, 600 based on Foata normal form. 10/5521 useless extension candidates. Maximal degree in co-relation 48378. Up to 5251 conditions per place. [2024-06-27 21:11:52,615 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 597 selfloop transitions, 35 changer transitions 0/636 dead transitions. [2024-06-27 21:11:52,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 636 transitions, 10408 flow [2024-06-27 21:11:52,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:11:52,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:11:52,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 21:11:52,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-27 21:11:52,616 INFO L175 Difference]: Start difference. First operand has 439 places, 610 transitions, 8965 flow. Second operand 9 states and 154 transitions. [2024-06-27 21:11:52,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 636 transitions, 10408 flow [2024-06-27 21:11:57,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 636 transitions, 10114 flow, removed 32 selfloop flow, removed 9 redundant places. [2024-06-27 21:11:57,153 INFO L231 Difference]: Finished difference. Result has 439 places, 611 transitions, 8794 flow [2024-06-27 21:11:57,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8691, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8794, PETRI_PLACES=439, PETRI_TRANSITIONS=611} [2024-06-27 21:11:57,153 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 398 predicate places. [2024-06-27 21:11:57,154 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 611 transitions, 8794 flow [2024-06-27 21:11:57,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:57,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:57,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:11:57,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 21:11:57,154 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:11:57,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:57,155 INFO L85 PathProgramCache]: Analyzing trace with hash 550278655, now seen corresponding path program 9 times [2024-06-27 21:11:57,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:57,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855149567] [2024-06-27 21:11:57,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:57,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:57,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:57,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:57,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:57,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855149567] [2024-06-27 21:11:57,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855149567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:57,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:57,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:11:57,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7248488] [2024-06-27 21:11:57,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:57,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:11:57,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:57,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:11:57,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:11:58,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:11:58,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 611 transitions, 8794 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:58,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:58,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:11:58,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:59,526 INFO L124 PetriNetUnfolderBase]: 3617/5534 cut-off events. [2024-06-27 21:11:59,526 INFO L125 PetriNetUnfolderBase]: For 624558/624558 co-relation queries the response was YES. [2024-06-27 21:11:59,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47760 conditions, 5534 events. 3617/5534 cut-off events. For 624558/624558 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 31439 event pairs, 621 based on Foata normal form. 2/5535 useless extension candidates. Maximal degree in co-relation 47560. Up to 5359 conditions per place. [2024-06-27 21:11:59,618 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 606 selfloop transitions, 20 changer transitions 0/630 dead transitions. [2024-06-27 21:11:59,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 630 transitions, 10167 flow [2024-06-27 21:11:59,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:11:59,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:11:59,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 21:11:59,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 21:11:59,619 INFO L175 Difference]: Start difference. First operand has 439 places, 611 transitions, 8794 flow. Second operand 8 states and 128 transitions. [2024-06-27 21:11:59,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 630 transitions, 10167 flow [2024-06-27 21:12:04,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 630 transitions, 10090 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 21:12:04,018 INFO L231 Difference]: Finished difference. Result has 441 places, 615 transitions, 8844 flow [2024-06-27 21:12:04,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8717, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8844, PETRI_PLACES=441, PETRI_TRANSITIONS=615} [2024-06-27 21:12:04,019 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 400 predicate places. [2024-06-27 21:12:04,019 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 615 transitions, 8844 flow [2024-06-27 21:12:04,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:04,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:04,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:12:04,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 21:12:04,020 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:12:04,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:04,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1942615589, now seen corresponding path program 10 times [2024-06-27 21:12:04,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:04,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010607131] [2024-06-27 21:12:04,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:04,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:04,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:04,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:04,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:04,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010607131] [2024-06-27 21:12:04,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010607131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:04,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:04,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:12:04,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672849020] [2024-06-27 21:12:04,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:04,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:12:04,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:04,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:12:04,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:12:05,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:12:05,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 615 transitions, 8844 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:05,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:05,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:12:05,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:06,691 INFO L124 PetriNetUnfolderBase]: 3625/5548 cut-off events. [2024-06-27 21:12:06,691 INFO L125 PetriNetUnfolderBase]: For 625636/625636 co-relation queries the response was YES. [2024-06-27 21:12:06,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47900 conditions, 5548 events. 3625/5548 cut-off events. For 625636/625636 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 31514 event pairs, 615 based on Foata normal form. 2/5549 useless extension candidates. Maximal degree in co-relation 47698. Up to 5342 conditions per place. [2024-06-27 21:12:06,771 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 595 selfloop transitions, 33 changer transitions 0/632 dead transitions. [2024-06-27 21:12:06,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 632 transitions, 10217 flow [2024-06-27 21:12:06,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:12:06,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:12:06,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 21:12:06,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403125 [2024-06-27 21:12:06,773 INFO L175 Difference]: Start difference. First operand has 441 places, 615 transitions, 8844 flow. Second operand 8 states and 129 transitions. [2024-06-27 21:12:06,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 632 transitions, 10217 flow [2024-06-27 21:12:10,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 632 transitions, 10130 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 21:12:10,097 INFO L231 Difference]: Finished difference. Result has 444 places, 617 transitions, 8899 flow [2024-06-27 21:12:10,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8757, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8899, PETRI_PLACES=444, PETRI_TRANSITIONS=617} [2024-06-27 21:12:10,097 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 403 predicate places. [2024-06-27 21:12:10,097 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 617 transitions, 8899 flow [2024-06-27 21:12:10,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:10,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:10,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:12:10,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 21:12:10,098 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:12:10,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:10,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1942607932, now seen corresponding path program 1 times [2024-06-27 21:12:10,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:10,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792017937] [2024-06-27 21:12:10,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:10,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:10,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:10,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:10,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:10,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792017937] [2024-06-27 21:12:10,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792017937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:10,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:10,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:12:10,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193756706] [2024-06-27 21:12:10,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:10,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:12:10,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:10,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:12:10,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:12:10,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:12:10,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 617 transitions, 8899 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:10,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:10,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:12:10,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:12,451 INFO L124 PetriNetUnfolderBase]: 3622/5542 cut-off events. [2024-06-27 21:12:12,451 INFO L125 PetriNetUnfolderBase]: For 624660/624660 co-relation queries the response was YES. [2024-06-27 21:12:12,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47900 conditions, 5542 events. 3622/5542 cut-off events. For 624660/624660 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 31480 event pairs, 620 based on Foata normal form. 1/5542 useless extension candidates. Maximal degree in co-relation 47697. Up to 5367 conditions per place. [2024-06-27 21:12:12,534 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 599 selfloop transitions, 29 changer transitions 0/632 dead transitions. [2024-06-27 21:12:12,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 632 transitions, 10220 flow [2024-06-27 21:12:12,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:12:12,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:12:12,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 21:12:12,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403125 [2024-06-27 21:12:12,535 INFO L175 Difference]: Start difference. First operand has 444 places, 617 transitions, 8899 flow. Second operand 8 states and 129 transitions. [2024-06-27 21:12:12,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 632 transitions, 10220 flow [2024-06-27 21:12:16,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 632 transitions, 10086 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-27 21:12:16,952 INFO L231 Difference]: Finished difference. Result has 446 places, 617 transitions, 8833 flow [2024-06-27 21:12:16,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8765, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8833, PETRI_PLACES=446, PETRI_TRANSITIONS=617} [2024-06-27 21:12:16,952 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 405 predicate places. [2024-06-27 21:12:16,952 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 617 transitions, 8833 flow [2024-06-27 21:12:16,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:16,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:16,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:12:16,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 21:12:16,953 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:12:16,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:16,953 INFO L85 PathProgramCache]: Analyzing trace with hash -2093804267, now seen corresponding path program 11 times [2024-06-27 21:12:16,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:16,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069942564] [2024-06-27 21:12:16,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:16,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:16,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:17,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:17,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:17,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069942564] [2024-06-27 21:12:17,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069942564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:17,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:17,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:12:17,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664621903] [2024-06-27 21:12:17,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:17,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:12:17,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:17,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:12:17,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:12:17,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:12:17,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 617 transitions, 8833 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:17,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:17,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:12:17,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:19,404 INFO L124 PetriNetUnfolderBase]: 3617/5535 cut-off events. [2024-06-27 21:12:19,404 INFO L125 PetriNetUnfolderBase]: For 616782/616782 co-relation queries the response was YES. [2024-06-27 21:12:19,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47382 conditions, 5535 events. 3617/5535 cut-off events. For 616782/616782 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 31387 event pairs, 617 based on Foata normal form. 2/5536 useless extension candidates. Maximal degree in co-relation 47178. Up to 5369 conditions per place. [2024-06-27 21:12:19,497 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 613 selfloop transitions, 17 changer transitions 0/634 dead transitions. [2024-06-27 21:12:19,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 634 transitions, 10204 flow [2024-06-27 21:12:19,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:12:19,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:12:19,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 21:12:19,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39375 [2024-06-27 21:12:19,498 INFO L175 Difference]: Start difference. First operand has 446 places, 617 transitions, 8833 flow. Second operand 8 states and 126 transitions. [2024-06-27 21:12:19,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 634 transitions, 10204 flow [2024-06-27 21:12:23,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 634 transitions, 9988 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-27 21:12:23,682 INFO L231 Difference]: Finished difference. Result has 445 places, 619 transitions, 8724 flow [2024-06-27 21:12:23,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8617, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8724, PETRI_PLACES=445, PETRI_TRANSITIONS=619} [2024-06-27 21:12:23,683 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 404 predicate places. [2024-06-27 21:12:23,683 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 619 transitions, 8724 flow [2024-06-27 21:12:23,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:23,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:23,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:12:23,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 21:12:23,684 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:12:23,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:23,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1242796776, now seen corresponding path program 1 times [2024-06-27 21:12:23,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:23,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342649378] [2024-06-27 21:12:23,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:23,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:23,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:24,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:24,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:24,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342649378] [2024-06-27 21:12:24,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342649378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:24,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:24,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:12:24,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641764070] [2024-06-27 21:12:24,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:24,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:12:24,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:24,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:12:24,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:12:24,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:12:24,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 619 transitions, 8724 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:24,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:24,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:12:24,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:26,353 INFO L124 PetriNetUnfolderBase]: 3630/5552 cut-off events. [2024-06-27 21:12:26,354 INFO L125 PetriNetUnfolderBase]: For 629327/629327 co-relation queries the response was YES. [2024-06-27 21:12:26,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47565 conditions, 5552 events. 3630/5552 cut-off events. For 629327/629327 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 31508 event pairs, 630 based on Foata normal form. 1/5552 useless extension candidates. Maximal degree in co-relation 47362. Up to 5064 conditions per place. [2024-06-27 21:12:26,444 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 496 selfloop transitions, 145 changer transitions 0/645 dead transitions. [2024-06-27 21:12:26,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 645 transitions, 10442 flow [2024-06-27 21:12:26,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:12:26,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:12:26,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 21:12:26,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-06-27 21:12:26,445 INFO L175 Difference]: Start difference. First operand has 445 places, 619 transitions, 8724 flow. Second operand 8 states and 148 transitions. [2024-06-27 21:12:26,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 645 transitions, 10442 flow [2024-06-27 21:12:31,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 645 transitions, 10347 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 21:12:31,897 INFO L231 Difference]: Finished difference. Result has 447 places, 625 transitions, 9109 flow [2024-06-27 21:12:31,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8631, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9109, PETRI_PLACES=447, PETRI_TRANSITIONS=625} [2024-06-27 21:12:31,898 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 406 predicate places. [2024-06-27 21:12:31,898 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 625 transitions, 9109 flow [2024-06-27 21:12:31,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:31,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:31,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:12:31,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 21:12:31,898 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:12:31,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:31,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1424914825, now seen corresponding path program 1 times [2024-06-27 21:12:31,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:31,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481167523] [2024-06-27 21:12:31,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:31,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:31,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:32,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:32,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:32,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481167523] [2024-06-27 21:12:32,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481167523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:32,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:32,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:12:32,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048264852] [2024-06-27 21:12:32,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:32,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:12:32,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:32,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:12:32,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:12:32,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:12:32,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 625 transitions, 9109 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:32,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:32,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:12:32,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:34,570 INFO L124 PetriNetUnfolderBase]: 3751/5725 cut-off events. [2024-06-27 21:12:34,570 INFO L125 PetriNetUnfolderBase]: For 703838/703838 co-relation queries the response was YES. [2024-06-27 21:12:34,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50854 conditions, 5725 events. 3751/5725 cut-off events. For 703838/703838 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 32537 event pairs, 551 based on Foata normal form. 6/5730 useless extension candidates. Maximal degree in co-relation 50650. Up to 4988 conditions per place. [2024-06-27 21:12:34,675 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 487 selfloop transitions, 201 changer transitions 0/692 dead transitions. [2024-06-27 21:12:34,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 692 transitions, 11800 flow [2024-06-27 21:12:34,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:12:34,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:12:34,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-27 21:12:34,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4575 [2024-06-27 21:12:34,677 INFO L175 Difference]: Start difference. First operand has 447 places, 625 transitions, 9109 flow. Second operand 10 states and 183 transitions. [2024-06-27 21:12:34,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 692 transitions, 11800 flow [2024-06-27 21:12:40,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 692 transitions, 11662 flow, removed 59 selfloop flow, removed 2 redundant places. [2024-06-27 21:12:40,227 INFO L231 Difference]: Finished difference. Result has 457 places, 659 transitions, 10226 flow [2024-06-27 21:12:40,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8987, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10226, PETRI_PLACES=457, PETRI_TRANSITIONS=659} [2024-06-27 21:12:40,228 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 416 predicate places. [2024-06-27 21:12:40,228 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 659 transitions, 10226 flow [2024-06-27 21:12:40,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:40,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:40,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:12:40,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 21:12:40,228 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:12:40,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:40,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1424914980, now seen corresponding path program 2 times [2024-06-27 21:12:40,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:40,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098548450] [2024-06-27 21:12:40,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:40,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:40,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:41,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:41,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:41,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098548450] [2024-06-27 21:12:41,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098548450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:41,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:41,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:12:41,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807678357] [2024-06-27 21:12:41,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:41,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:12:41,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:41,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:12:41,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:12:41,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:12:41,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 659 transitions, 10226 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:41,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:41,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:12:41,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:43,068 INFO L124 PetriNetUnfolderBase]: 3744/5725 cut-off events. [2024-06-27 21:12:43,069 INFO L125 PetriNetUnfolderBase]: For 689298/689298 co-relation queries the response was YES. [2024-06-27 21:12:43,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52314 conditions, 5725 events. 3744/5725 cut-off events. For 689298/689298 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 32686 event pairs, 623 based on Foata normal form. 1/5725 useless extension candidates. Maximal degree in co-relation 52106. Up to 5321 conditions per place. [2024-06-27 21:12:43,168 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 547 selfloop transitions, 126 changer transitions 0/677 dead transitions. [2024-06-27 21:12:43,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 677 transitions, 11636 flow [2024-06-27 21:12:43,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:12:43,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:12:43,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 21:12:43,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-27 21:12:43,169 INFO L175 Difference]: Start difference. First operand has 457 places, 659 transitions, 10226 flow. Second operand 9 states and 155 transitions. [2024-06-27 21:12:43,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 677 transitions, 11636 flow [2024-06-27 21:12:48,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 677 transitions, 11294 flow, removed 83 selfloop flow, removed 9 redundant places. [2024-06-27 21:12:48,775 INFO L231 Difference]: Finished difference. Result has 457 places, 660 transitions, 10168 flow [2024-06-27 21:12:48,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9884, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10168, PETRI_PLACES=457, PETRI_TRANSITIONS=660} [2024-06-27 21:12:48,776 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 416 predicate places. [2024-06-27 21:12:48,776 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 660 transitions, 10168 flow [2024-06-27 21:12:48,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:48,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:48,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:12:48,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 21:12:48,777 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:12:48,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:48,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1419262486, now seen corresponding path program 3 times [2024-06-27 21:12:48,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:48,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687941796] [2024-06-27 21:12:48,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:48,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:48,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:49,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:49,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:49,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687941796] [2024-06-27 21:12:49,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687941796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:49,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:49,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:12:49,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608755194] [2024-06-27 21:12:49,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:49,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:12:49,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:49,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:12:49,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:12:50,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:12:50,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 660 transitions, 10168 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:50,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:50,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:12:50,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:51,868 INFO L124 PetriNetUnfolderBase]: 3741/5715 cut-off events. [2024-06-27 21:12:51,869 INFO L125 PetriNetUnfolderBase]: For 656125/656125 co-relation queries the response was YES. [2024-06-27 21:12:51,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51361 conditions, 5715 events. 3741/5715 cut-off events. For 656125/656125 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 32573 event pairs, 631 based on Foata normal form. 1/5715 useless extension candidates. Maximal degree in co-relation 51155. Up to 5345 conditions per place. [2024-06-27 21:12:51,956 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 555 selfloop transitions, 115 changer transitions 0/674 dead transitions. [2024-06-27 21:12:51,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 674 transitions, 11551 flow [2024-06-27 21:12:51,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:12:51,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:12:51,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-27 21:12:51,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-27 21:12:51,957 INFO L175 Difference]: Start difference. First operand has 457 places, 660 transitions, 10168 flow. Second operand 9 states and 151 transitions. [2024-06-27 21:12:51,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 674 transitions, 11551 flow [2024-06-27 21:12:57,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 674 transitions, 11153 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-27 21:12:57,509 INFO L231 Difference]: Finished difference. Result has 458 places, 660 transitions, 10025 flow [2024-06-27 21:12:57,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9770, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10025, PETRI_PLACES=458, PETRI_TRANSITIONS=660} [2024-06-27 21:12:57,509 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 417 predicate places. [2024-06-27 21:12:57,509 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 660 transitions, 10025 flow [2024-06-27 21:12:57,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:57,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:57,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:12:57,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 21:12:57,510 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:12:57,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:57,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1419256751, now seen corresponding path program 2 times [2024-06-27 21:12:57,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:57,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486799260] [2024-06-27 21:12:57,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:57,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:57,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:58,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:58,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:58,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486799260] [2024-06-27 21:12:58,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486799260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:58,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:58,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:12:58,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151701946] [2024-06-27 21:12:58,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:58,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:12:58,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:58,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:12:58,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:12:58,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:12:58,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 660 transitions, 10025 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:58,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:58,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:12:58,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:00,303 INFO L124 PetriNetUnfolderBase]: 3767/5747 cut-off events. [2024-06-27 21:13:00,304 INFO L125 PetriNetUnfolderBase]: For 686401/686401 co-relation queries the response was YES. [2024-06-27 21:13:00,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52012 conditions, 5747 events. 3767/5747 cut-off events. For 686401/686401 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 32683 event pairs, 548 based on Foata normal form. 2/5748 useless extension candidates. Maximal degree in co-relation 51805. Up to 5304 conditions per place. [2024-06-27 21:13:00,406 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 561 selfloop transitions, 126 changer transitions 0/691 dead transitions. [2024-06-27 21:13:00,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 691 transitions, 11939 flow [2024-06-27 21:13:00,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:13:00,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:13:00,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 202 transitions. [2024-06-27 21:13:00,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42083333333333334 [2024-06-27 21:13:00,408 INFO L175 Difference]: Start difference. First operand has 458 places, 660 transitions, 10025 flow. Second operand 12 states and 202 transitions. [2024-06-27 21:13:00,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 691 transitions, 11939 flow [2024-06-27 21:13:05,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 691 transitions, 11687 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-27 21:13:05,845 INFO L231 Difference]: Finished difference. Result has 462 places, 666 transitions, 10237 flow [2024-06-27 21:13:05,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9775, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10237, PETRI_PLACES=462, PETRI_TRANSITIONS=666} [2024-06-27 21:13:05,845 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 421 predicate places. [2024-06-27 21:13:05,845 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 666 transitions, 10237 flow [2024-06-27 21:13:05,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:05,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:05,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:05,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 21:13:05,846 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:05,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:05,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1419262331, now seen corresponding path program 3 times [2024-06-27 21:13:05,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:05,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283072475] [2024-06-27 21:13:05,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:05,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:05,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:06,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:06,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:06,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283072475] [2024-06-27 21:13:06,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283072475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:06,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:06,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:13:06,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215437749] [2024-06-27 21:13:06,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:06,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:13:06,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:06,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:13:06,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:13:06,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:13:06,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 666 transitions, 10237 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:06,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:06,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:13:06,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:08,736 INFO L124 PetriNetUnfolderBase]: 3761/5743 cut-off events. [2024-06-27 21:13:08,736 INFO L125 PetriNetUnfolderBase]: For 675545/675545 co-relation queries the response was YES. [2024-06-27 21:13:08,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51898 conditions, 5743 events. 3761/5743 cut-off events. For 675545/675545 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 32721 event pairs, 551 based on Foata normal form. 2/5744 useless extension candidates. Maximal degree in co-relation 51691. Up to 5299 conditions per place. [2024-06-27 21:13:08,837 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 562 selfloop transitions, 122 changer transitions 0/688 dead transitions. [2024-06-27 21:13:08,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 688 transitions, 11733 flow [2024-06-27 21:13:08,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:13:08,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:13:08,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-27 21:13:08,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325 [2024-06-27 21:13:08,839 INFO L175 Difference]: Start difference. First operand has 462 places, 666 transitions, 10237 flow. Second operand 10 states and 173 transitions. [2024-06-27 21:13:08,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 688 transitions, 11733 flow [2024-06-27 21:13:13,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 688 transitions, 11424 flow, removed 67 selfloop flow, removed 9 redundant places. [2024-06-27 21:13:13,477 INFO L231 Difference]: Finished difference. Result has 463 places, 666 transitions, 10188 flow [2024-06-27 21:13:13,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9928, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10188, PETRI_PLACES=463, PETRI_TRANSITIONS=666} [2024-06-27 21:13:13,478 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 422 predicate places. [2024-06-27 21:13:13,478 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 666 transitions, 10188 flow [2024-06-27 21:13:13,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:13,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:13,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:13,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 21:13:13,478 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:13,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:13,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1128187947, now seen corresponding path program 4 times [2024-06-27 21:13:13,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:13,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771016529] [2024-06-27 21:13:13,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:13,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:13,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:14,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:14,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:14,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771016529] [2024-06-27 21:13:14,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771016529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:14,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:14,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:13:14,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659622113] [2024-06-27 21:13:14,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:14,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:13:14,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:14,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:13:14,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:13:14,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:13:14,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 666 transitions, 10188 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:14,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:14,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:13:14,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:16,291 INFO L124 PetriNetUnfolderBase]: 3771/5759 cut-off events. [2024-06-27 21:13:16,291 INFO L125 PetriNetUnfolderBase]: For 677383/677383 co-relation queries the response was YES. [2024-06-27 21:13:16,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52144 conditions, 5759 events. 3771/5759 cut-off events. For 677383/677383 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 32865 event pairs, 619 based on Foata normal form. 2/5760 useless extension candidates. Maximal degree in co-relation 51936. Up to 5489 conditions per place. [2024-06-27 21:13:16,395 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 628 selfloop transitions, 50 changer transitions 0/682 dead transitions. [2024-06-27 21:13:16,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 682 transitions, 11714 flow [2024-06-27 21:13:16,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:13:16,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:13:16,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 21:13:16,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-27 21:13:16,396 INFO L175 Difference]: Start difference. First operand has 463 places, 666 transitions, 10188 flow. Second operand 8 states and 134 transitions. [2024-06-27 21:13:16,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 682 transitions, 11714 flow [2024-06-27 21:13:20,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 682 transitions, 11458 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-27 21:13:20,735 INFO L231 Difference]: Finished difference. Result has 461 places, 669 transitions, 10154 flow [2024-06-27 21:13:20,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9932, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=616, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10154, PETRI_PLACES=461, PETRI_TRANSITIONS=669} [2024-06-27 21:13:20,736 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 420 predicate places. [2024-06-27 21:13:20,736 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 669 transitions, 10154 flow [2024-06-27 21:13:20,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:20,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:20,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:20,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 21:13:20,737 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:20,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:20,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1135545177, now seen corresponding path program 5 times [2024-06-27 21:13:20,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:20,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479055243] [2024-06-27 21:13:20,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:20,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:20,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:21,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:21,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:21,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479055243] [2024-06-27 21:13:21,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479055243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:21,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:21,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:13:21,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855643964] [2024-06-27 21:13:21,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:21,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:13:21,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:21,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:13:21,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:13:21,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:13:21,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 669 transitions, 10154 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:21,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:21,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:13:21,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:23,635 INFO L124 PetriNetUnfolderBase]: 3797/5799 cut-off events. [2024-06-27 21:13:23,635 INFO L125 PetriNetUnfolderBase]: For 693429/693429 co-relation queries the response was YES. [2024-06-27 21:13:23,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52802 conditions, 5799 events. 3797/5799 cut-off events. For 693429/693429 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 33162 event pairs, 596 based on Foata normal form. 2/5800 useless extension candidates. Maximal degree in co-relation 52594. Up to 5256 conditions per place. [2024-06-27 21:13:23,723 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 549 selfloop transitions, 150 changer transitions 0/703 dead transitions. [2024-06-27 21:13:23,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 703 transitions, 12226 flow [2024-06-27 21:13:23,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:13:23,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:13:23,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 21:13:23,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 21:13:23,725 INFO L175 Difference]: Start difference. First operand has 461 places, 669 transitions, 10154 flow. Second operand 9 states and 162 transitions. [2024-06-27 21:13:23,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 703 transitions, 12226 flow [2024-06-27 21:13:27,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 703 transitions, 12054 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-27 21:13:27,723 INFO L231 Difference]: Finished difference. Result has 464 places, 677 transitions, 10664 flow [2024-06-27 21:13:27,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9984, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10664, PETRI_PLACES=464, PETRI_TRANSITIONS=677} [2024-06-27 21:13:27,724 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 423 predicate places. [2024-06-27 21:13:27,724 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 677 transitions, 10664 flow [2024-06-27 21:13:27,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:27,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:27,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:27,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 21:13:27,725 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:27,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:27,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1135539597, now seen corresponding path program 6 times [2024-06-27 21:13:27,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:27,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474077048] [2024-06-27 21:13:27,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:27,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:27,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:28,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:28,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:28,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474077048] [2024-06-27 21:13:28,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474077048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:28,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:28,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:13:28,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436431892] [2024-06-27 21:13:28,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:28,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:13:28,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:28,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:13:28,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:13:28,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:13:28,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 677 transitions, 10664 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:28,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:28,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:13:28,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:30,694 INFO L124 PetriNetUnfolderBase]: 3791/5787 cut-off events. [2024-06-27 21:13:30,694 INFO L125 PetriNetUnfolderBase]: For 685403/685403 co-relation queries the response was YES. [2024-06-27 21:13:30,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53214 conditions, 5787 events. 3791/5787 cut-off events. For 685403/685403 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 33032 event pairs, 600 based on Foata normal form. 2/5788 useless extension candidates. Maximal degree in co-relation 53005. Up to 5251 conditions per place. [2024-06-27 21:13:30,792 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 557 selfloop transitions, 140 changer transitions 0/701 dead transitions. [2024-06-27 21:13:30,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 701 transitions, 12486 flow [2024-06-27 21:13:30,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:13:30,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:13:30,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 21:13:30,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-27 21:13:30,794 INFO L175 Difference]: Start difference. First operand has 464 places, 677 transitions, 10664 flow. Second operand 9 states and 159 transitions. [2024-06-27 21:13:30,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 701 transitions, 12486 flow [2024-06-27 21:13:35,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 701 transitions, 12263 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-27 21:13:35,524 INFO L231 Difference]: Finished difference. Result has 467 places, 678 transitions, 10784 flow [2024-06-27 21:13:35,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10445, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10784, PETRI_PLACES=467, PETRI_TRANSITIONS=678} [2024-06-27 21:13:35,525 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 426 predicate places. [2024-06-27 21:13:35,525 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 678 transitions, 10784 flow [2024-06-27 21:13:35,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:35,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:35,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:35,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 21:13:35,526 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:35,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:35,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1617940392, now seen corresponding path program 4 times [2024-06-27 21:13:35,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:35,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597668008] [2024-06-27 21:13:35,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:35,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:35,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:36,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:36,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:36,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597668008] [2024-06-27 21:13:36,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597668008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:36,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:36,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:13:36,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676600510] [2024-06-27 21:13:36,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:36,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:13:36,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:36,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:13:36,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:13:36,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:13:36,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 678 transitions, 10784 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:36,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:36,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:13:36,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:38,335 INFO L124 PetriNetUnfolderBase]: 3796/5796 cut-off events. [2024-06-27 21:13:38,335 INFO L125 PetriNetUnfolderBase]: For 679910/679910 co-relation queries the response was YES. [2024-06-27 21:13:38,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53512 conditions, 5796 events. 3796/5796 cut-off events. For 679910/679910 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 33095 event pairs, 635 based on Foata normal form. 1/5796 useless extension candidates. Maximal degree in co-relation 53302. Up to 5059 conditions per place. [2024-06-27 21:13:38,435 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 470 selfloop transitions, 234 changer transitions 0/708 dead transitions. [2024-06-27 21:13:38,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 708 transitions, 12662 flow [2024-06-27 21:13:38,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:13:38,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:13:38,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 21:13:38,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527777777777778 [2024-06-27 21:13:38,437 INFO L175 Difference]: Start difference. First operand has 467 places, 678 transitions, 10784 flow. Second operand 9 states and 163 transitions. [2024-06-27 21:13:38,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 708 transitions, 12662 flow [2024-06-27 21:13:44,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 708 transitions, 12428 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 21:13:44,055 INFO L231 Difference]: Finished difference. Result has 470 places, 684 transitions, 11224 flow [2024-06-27 21:13:44,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10552, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11224, PETRI_PLACES=470, PETRI_TRANSITIONS=684} [2024-06-27 21:13:44,056 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 429 predicate places. [2024-06-27 21:13:44,056 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 684 transitions, 11224 flow [2024-06-27 21:13:44,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:44,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:44,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:44,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 21:13:44,056 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:44,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:44,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1620920112, now seen corresponding path program 5 times [2024-06-27 21:13:44,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:44,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706784823] [2024-06-27 21:13:44,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:44,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:44,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:44,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:44,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:44,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706784823] [2024-06-27 21:13:44,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706784823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:44,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:44,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:13:44,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448271851] [2024-06-27 21:13:44,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:44,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:13:44,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:44,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:13:44,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:13:45,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:13:45,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 684 transitions, 11224 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:45,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:45,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:13:45,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:46,744 INFO L124 PetriNetUnfolderBase]: 3816/5835 cut-off events. [2024-06-27 21:13:46,744 INFO L125 PetriNetUnfolderBase]: For 684577/684579 co-relation queries the response was YES. [2024-06-27 21:13:46,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54233 conditions, 5835 events. 3816/5835 cut-off events. For 684577/684579 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 33479 event pairs, 655 based on Foata normal form. 3/5837 useless extension candidates. Maximal degree in co-relation 54023. Up to 5201 conditions per place. [2024-06-27 21:13:46,845 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 514 selfloop transitions, 201 changer transitions 0/719 dead transitions. [2024-06-27 21:13:46,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 719 transitions, 13150 flow [2024-06-27 21:13:46,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:13:46,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:13:46,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-27 21:13:46,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42727272727272725 [2024-06-27 21:13:46,846 INFO L175 Difference]: Start difference. First operand has 470 places, 684 transitions, 11224 flow. Second operand 11 states and 188 transitions. [2024-06-27 21:13:46,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 719 transitions, 13150 flow [2024-06-27 21:13:51,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 719 transitions, 12678 flow, removed 83 selfloop flow, removed 5 redundant places. [2024-06-27 21:13:51,091 INFO L231 Difference]: Finished difference. Result has 476 places, 696 transitions, 11385 flow [2024-06-27 21:13:51,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10802, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11385, PETRI_PLACES=476, PETRI_TRANSITIONS=696} [2024-06-27 21:13:51,091 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 435 predicate places. [2024-06-27 21:13:51,091 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 696 transitions, 11385 flow [2024-06-27 21:13:51,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:51,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:51,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:51,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-27 21:13:51,092 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:51,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:51,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1736511548, now seen corresponding path program 1 times [2024-06-27 21:13:51,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:51,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611317519] [2024-06-27 21:13:51,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:51,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:51,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:51,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:51,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:51,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611317519] [2024-06-27 21:13:51,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611317519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:51,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:51,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:13:51,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565089661] [2024-06-27 21:13:51,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:51,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:13:51,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:51,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:13:51,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:13:52,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:13:52,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 696 transitions, 11385 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:52,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:52,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:13:52,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:53,892 INFO L124 PetriNetUnfolderBase]: 3860/5899 cut-off events. [2024-06-27 21:13:53,892 INFO L125 PetriNetUnfolderBase]: For 761669/761671 co-relation queries the response was YES. [2024-06-27 21:13:53,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55063 conditions, 5899 events. 3860/5899 cut-off events. For 761669/761671 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 33839 event pairs, 572 based on Foata normal form. 14/5912 useless extension candidates. Maximal degree in co-relation 54851. Up to 5548 conditions per place. [2024-06-27 21:13:53,984 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 652 selfloop transitions, 64 changer transitions 0/720 dead transitions. [2024-06-27 21:13:53,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 720 transitions, 13012 flow [2024-06-27 21:13:53,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:13:53,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:13:53,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 21:13:53,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4388888888888889 [2024-06-27 21:13:53,985 INFO L175 Difference]: Start difference. First operand has 476 places, 696 transitions, 11385 flow. Second operand 9 states and 158 transitions. [2024-06-27 21:13:53,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 720 transitions, 13012 flow [2024-06-27 21:13:59,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 720 transitions, 12649 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 21:13:59,373 INFO L231 Difference]: Finished difference. Result has 479 places, 697 transitions, 11187 flow [2024-06-27 21:13:59,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11022, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=632, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11187, PETRI_PLACES=479, PETRI_TRANSITIONS=697} [2024-06-27 21:13:59,374 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 438 predicate places. [2024-06-27 21:13:59,374 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 697 transitions, 11187 flow [2024-06-27 21:13:59,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:59,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:59,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:59,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-27 21:13:59,375 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:59,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:59,375 INFO L85 PathProgramCache]: Analyzing trace with hash -736713728, now seen corresponding path program 1 times [2024-06-27 21:13:59,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:59,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883359337] [2024-06-27 21:13:59,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:59,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:59,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:00,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:00,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:00,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883359337] [2024-06-27 21:14:00,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883359337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:00,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:00,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:14:00,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492989865] [2024-06-27 21:14:00,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:00,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:14:00,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:00,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:14:00,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:14:00,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:14:00,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 697 transitions, 11187 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:00,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:00,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:14:00,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:02,249 INFO L124 PetriNetUnfolderBase]: 3870/5917 cut-off events. [2024-06-27 21:14:02,249 INFO L125 PetriNetUnfolderBase]: For 713869/713871 co-relation queries the response was YES. [2024-06-27 21:14:02,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55121 conditions, 5917 events. 3870/5917 cut-off events. For 713869/713871 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 34028 event pairs, 579 based on Foata normal form. 4/5920 useless extension candidates. Maximal degree in co-relation 54908. Up to 5603 conditions per place. [2024-06-27 21:14:02,353 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 643 selfloop transitions, 83 changer transitions 0/730 dead transitions. [2024-06-27 21:14:02,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 730 transitions, 12919 flow [2024-06-27 21:14:02,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:14:02,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:14:02,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 197 transitions. [2024-06-27 21:14:02,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41041666666666665 [2024-06-27 21:14:02,354 INFO L175 Difference]: Start difference. First operand has 479 places, 697 transitions, 11187 flow. Second operand 12 states and 197 transitions. [2024-06-27 21:14:02,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 730 transitions, 12919 flow [2024-06-27 21:14:07,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 730 transitions, 12824 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 21:14:07,650 INFO L231 Difference]: Finished difference. Result has 488 places, 708 transitions, 11534 flow [2024-06-27 21:14:07,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11092, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11534, PETRI_PLACES=488, PETRI_TRANSITIONS=708} [2024-06-27 21:14:07,651 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 447 predicate places. [2024-06-27 21:14:07,651 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 708 transitions, 11534 flow [2024-06-27 21:14:07,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:07,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:07,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:07,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-27 21:14:07,652 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:07,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:07,652 INFO L85 PathProgramCache]: Analyzing trace with hash -736891730, now seen corresponding path program 6 times [2024-06-27 21:14:07,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:07,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272624524] [2024-06-27 21:14:07,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:07,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:07,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:08,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:08,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:08,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272624524] [2024-06-27 21:14:08,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272624524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:08,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:08,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:14:08,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844580630] [2024-06-27 21:14:08,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:08,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:14:08,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:08,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:14:08,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:14:08,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:14:08,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 708 transitions, 11534 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:08,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:08,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:14:08,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:10,472 INFO L124 PetriNetUnfolderBase]: 3890/5953 cut-off events. [2024-06-27 21:14:10,472 INFO L125 PetriNetUnfolderBase]: For 720890/720892 co-relation queries the response was YES. [2024-06-27 21:14:10,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55822 conditions, 5953 events. 3890/5953 cut-off events. For 720890/720892 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 34324 event pairs, 655 based on Foata normal form. 3/5955 useless extension candidates. Maximal degree in co-relation 55605. Up to 5609 conditions per place. [2024-06-27 21:14:10,577 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 633 selfloop transitions, 98 changer transitions 0/735 dead transitions. [2024-06-27 21:14:10,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 735 transitions, 13218 flow [2024-06-27 21:14:10,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:14:10,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:14:10,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-27 21:14:10,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41 [2024-06-27 21:14:10,579 INFO L175 Difference]: Start difference. First operand has 488 places, 708 transitions, 11534 flow. Second operand 10 states and 164 transitions. [2024-06-27 21:14:10,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 735 transitions, 13218 flow [2024-06-27 21:14:15,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 735 transitions, 13106 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-27 21:14:15,953 INFO L231 Difference]: Finished difference. Result has 495 places, 720 transitions, 11817 flow [2024-06-27 21:14:15,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11422, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11817, PETRI_PLACES=495, PETRI_TRANSITIONS=720} [2024-06-27 21:14:15,954 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 454 predicate places. [2024-06-27 21:14:15,954 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 720 transitions, 11817 flow [2024-06-27 21:14:15,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:15,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:15,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:15,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-27 21:14:15,954 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:15,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:15,955 INFO L85 PathProgramCache]: Analyzing trace with hash -736891358, now seen corresponding path program 2 times [2024-06-27 21:14:15,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:15,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156560806] [2024-06-27 21:14:15,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:15,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:15,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:16,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:16,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:16,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156560806] [2024-06-27 21:14:16,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156560806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:16,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:16,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:14:16,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505156013] [2024-06-27 21:14:16,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:16,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:14:16,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:16,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:14:16,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:14:16,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:14:16,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 720 transitions, 11817 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:16,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:16,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:14:16,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:18,895 INFO L124 PetriNetUnfolderBase]: 3916/5983 cut-off events. [2024-06-27 21:14:18,896 INFO L125 PetriNetUnfolderBase]: For 752188/752190 co-relation queries the response was YES. [2024-06-27 21:14:18,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56618 conditions, 5983 events. 3916/5983 cut-off events. For 752188/752190 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 34442 event pairs, 580 based on Foata normal form. 4/5986 useless extension candidates. Maximal degree in co-relation 56399. Up to 5630 conditions per place. [2024-06-27 21:14:18,989 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 647 selfloop transitions, 97 changer transitions 0/748 dead transitions. [2024-06-27 21:14:18,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 748 transitions, 13774 flow [2024-06-27 21:14:18,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:14:18,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:14:18,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-27 21:14:18,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325 [2024-06-27 21:14:18,990 INFO L175 Difference]: Start difference. First operand has 495 places, 720 transitions, 11817 flow. Second operand 10 states and 173 transitions. [2024-06-27 21:14:18,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 748 transitions, 13774 flow [2024-06-27 21:14:24,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 748 transitions, 13562 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-27 21:14:24,845 INFO L231 Difference]: Finished difference. Result has 501 places, 727 transitions, 12006 flow [2024-06-27 21:14:24,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11606, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12006, PETRI_PLACES=501, PETRI_TRANSITIONS=727} [2024-06-27 21:14:24,846 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 460 predicate places. [2024-06-27 21:14:24,846 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 727 transitions, 12006 flow [2024-06-27 21:14:24,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:24,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:24,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:24,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-27 21:14:24,847 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:24,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:24,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1736331624, now seen corresponding path program 3 times [2024-06-27 21:14:24,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:24,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954396848] [2024-06-27 21:14:24,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:24,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:24,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:25,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:25,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:25,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954396848] [2024-06-27 21:14:25,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954396848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:25,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:25,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:14:25,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198348347] [2024-06-27 21:14:25,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:25,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:14:25,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:25,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:14:25,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:14:25,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:14:25,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 727 transitions, 12006 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:25,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:25,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:14:25,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:27,891 INFO L124 PetriNetUnfolderBase]: 3920/5997 cut-off events. [2024-06-27 21:14:27,891 INFO L125 PetriNetUnfolderBase]: For 765008/765010 co-relation queries the response was YES. [2024-06-27 21:14:27,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56725 conditions, 5997 events. 3920/5997 cut-off events. For 765008/765010 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 34617 event pairs, 578 based on Foata normal form. 6/6002 useless extension candidates. Maximal degree in co-relation 56504. Up to 5602 conditions per place. [2024-06-27 21:14:27,997 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 652 selfloop transitions, 94 changer transitions 0/750 dead transitions. [2024-06-27 21:14:27,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 750 transitions, 13670 flow [2024-06-27 21:14:27,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:14:27,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:14:27,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-27 21:14:27,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 21:14:27,998 INFO L175 Difference]: Start difference. First operand has 501 places, 727 transitions, 12006 flow. Second operand 10 states and 175 transitions. [2024-06-27 21:14:27,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 750 transitions, 13670 flow [2024-06-27 21:14:33,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 750 transitions, 13480 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-27 21:14:33,599 INFO L231 Difference]: Finished difference. Result has 504 places, 730 transitions, 12120 flow [2024-06-27 21:14:33,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11816, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=727, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12120, PETRI_PLACES=504, PETRI_TRANSITIONS=730} [2024-06-27 21:14:33,601 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 463 predicate places. [2024-06-27 21:14:33,601 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 730 transitions, 12120 flow [2024-06-27 21:14:33,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:33,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:33,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:33,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-27 21:14:33,602 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:33,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:33,602 INFO L85 PathProgramCache]: Analyzing trace with hash -2125257416, now seen corresponding path program 2 times [2024-06-27 21:14:33,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:33,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898796898] [2024-06-27 21:14:33,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:33,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:33,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:34,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:34,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:34,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898796898] [2024-06-27 21:14:34,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898796898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:34,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:34,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:14:34,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676303026] [2024-06-27 21:14:34,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:34,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:14:34,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:34,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:14:34,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:14:34,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:14:34,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 730 transitions, 12120 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:34,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:34,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:14:34,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:36,452 INFO L124 PetriNetUnfolderBase]: 3964/6066 cut-off events. [2024-06-27 21:14:36,453 INFO L125 PetriNetUnfolderBase]: For 834301/834301 co-relation queries the response was YES. [2024-06-27 21:14:36,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57976 conditions, 6066 events. 3964/6066 cut-off events. For 834301/834301 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 35165 event pairs, 647 based on Foata normal form. 12/6077 useless extension candidates. Maximal degree in co-relation 57754. Up to 5744 conditions per place. [2024-06-27 21:14:36,563 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 702 selfloop transitions, 41 changer transitions 0/747 dead transitions. [2024-06-27 21:14:36,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 747 transitions, 13780 flow [2024-06-27 21:14:36,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:14:36,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:14:36,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 21:14:36,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-27 21:14:36,564 INFO L175 Difference]: Start difference. First operand has 504 places, 730 transitions, 12120 flow. Second operand 7 states and 124 transitions. [2024-06-27 21:14:36,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 747 transitions, 13780 flow [2024-06-27 21:14:42,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 747 transitions, 13450 flow, removed 47 selfloop flow, removed 9 redundant places. [2024-06-27 21:14:42,813 INFO L231 Difference]: Finished difference. Result has 502 places, 731 transitions, 11913 flow [2024-06-27 21:14:42,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11790, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=689, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11913, PETRI_PLACES=502, PETRI_TRANSITIONS=731} [2024-06-27 21:14:42,814 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 461 predicate places. [2024-06-27 21:14:42,814 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 731 transitions, 11913 flow [2024-06-27 21:14:42,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:42,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:42,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:42,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-27 21:14:42,815 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:42,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:42,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1941808730, now seen corresponding path program 3 times [2024-06-27 21:14:42,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:42,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603283052] [2024-06-27 21:14:42,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:42,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:43,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:43,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:43,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603283052] [2024-06-27 21:14:43,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603283052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:43,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:43,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:14:43,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391669807] [2024-06-27 21:14:43,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:43,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:14:43,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:43,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:14:43,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:14:43,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:14:43,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 731 transitions, 11913 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:43,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:43,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:14:43,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:45,703 INFO L124 PetriNetUnfolderBase]: 4008/6130 cut-off events. [2024-06-27 21:14:45,703 INFO L125 PetriNetUnfolderBase]: For 847310/847310 co-relation queries the response was YES. [2024-06-27 21:14:45,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58355 conditions, 6130 events. 4008/6130 cut-off events. For 847310/847310 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 35505 event pairs, 577 based on Foata normal form. 12/6141 useless extension candidates. Maximal degree in co-relation 58133. Up to 5614 conditions per place. [2024-06-27 21:14:45,816 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 650 selfloop transitions, 99 changer transitions 0/753 dead transitions. [2024-06-27 21:14:45,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 753 transitions, 13605 flow [2024-06-27 21:14:45,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:14:45,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:14:45,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:14:45,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-27 21:14:45,817 INFO L175 Difference]: Start difference. First operand has 502 places, 731 transitions, 11913 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:14:45,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 753 transitions, 13605 flow [2024-06-27 21:14:52,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 753 transitions, 13536 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 21:14:52,450 INFO L231 Difference]: Finished difference. Result has 506 places, 732 transitions, 12094 flow [2024-06-27 21:14:52,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11844, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=731, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=632, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12094, PETRI_PLACES=506, PETRI_TRANSITIONS=732} [2024-06-27 21:14:52,463 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 465 predicate places. [2024-06-27 21:14:52,463 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 732 transitions, 12094 flow [2024-06-27 21:14:52,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:52,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:52,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:52,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-27 21:14:52,464 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:52,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:52,464 INFO L85 PathProgramCache]: Analyzing trace with hash -2116983206, now seen corresponding path program 4 times [2024-06-27 21:14:52,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:52,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78424392] [2024-06-27 21:14:52,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:52,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:52,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:53,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:53,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:53,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78424392] [2024-06-27 21:14:53,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78424392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:53,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:53,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:14:53,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405612541] [2024-06-27 21:14:53,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:53,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:14:53,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:53,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:14:53,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:14:53,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:14:53,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 732 transitions, 12094 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:53,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:53,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:14:53,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:55,251 INFO L124 PetriNetUnfolderBase]: 4044/6182 cut-off events. [2024-06-27 21:14:55,251 INFO L125 PetriNetUnfolderBase]: For 851264/851264 co-relation queries the response was YES. [2024-06-27 21:14:55,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59261 conditions, 6182 events. 4044/6182 cut-off events. For 851264/851264 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 35897 event pairs, 667 based on Foata normal form. 10/6191 useless extension candidates. Maximal degree in co-relation 59038. Up to 5795 conditions per place. [2024-06-27 21:14:55,364 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 685 selfloop transitions, 60 changer transitions 0/749 dead transitions. [2024-06-27 21:14:55,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 749 transitions, 13762 flow [2024-06-27 21:14:55,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:14:55,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:14:55,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 21:14:55,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 21:14:55,366 INFO L175 Difference]: Start difference. First operand has 506 places, 732 transitions, 12094 flow. Second operand 7 states and 125 transitions. [2024-06-27 21:14:55,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 749 transitions, 13762 flow [2024-06-27 21:15:02,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 749 transitions, 13566 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 21:15:02,043 INFO L231 Difference]: Finished difference. Result has 507 places, 733 transitions, 12070 flow [2024-06-27 21:15:02,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11900, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=672, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12070, PETRI_PLACES=507, PETRI_TRANSITIONS=733} [2024-06-27 21:15:02,043 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 466 predicate places. [2024-06-27 21:15:02,044 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 733 transitions, 12070 flow [2024-06-27 21:15:02,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:02,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:02,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:02,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-27 21:15:02,044 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:15:02,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:02,045 INFO L85 PathProgramCache]: Analyzing trace with hash -2125027024, now seen corresponding path program 1 times [2024-06-27 21:15:02,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:02,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417031467] [2024-06-27 21:15:02,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:02,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:02,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:02,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:02,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:02,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417031467] [2024-06-27 21:15:02,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417031467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:02,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:02,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:15:02,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128065160] [2024-06-27 21:15:02,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:02,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:15:02,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:02,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:15:02,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:15:03,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:15:03,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 733 transitions, 12070 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:03,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:03,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:15:03,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:04,891 INFO L124 PetriNetUnfolderBase]: 4051/6201 cut-off events. [2024-06-27 21:15:04,892 INFO L125 PetriNetUnfolderBase]: For 789853/789855 co-relation queries the response was YES. [2024-06-27 21:15:04,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59102 conditions, 6201 events. 4051/6201 cut-off events. For 789853/789855 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 36096 event pairs, 674 based on Foata normal form. 4/6204 useless extension candidates. Maximal degree in co-relation 58878. Up to 5929 conditions per place. [2024-06-27 21:15:05,006 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 698 selfloop transitions, 50 changer transitions 0/752 dead transitions. [2024-06-27 21:15:05,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 752 transitions, 13819 flow [2024-06-27 21:15:05,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:15:05,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:15:05,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 21:15:05,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43214285714285716 [2024-06-27 21:15:05,008 INFO L175 Difference]: Start difference. First operand has 507 places, 733 transitions, 12070 flow. Second operand 7 states and 121 transitions. [2024-06-27 21:15:05,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 752 transitions, 13819 flow [2024-06-27 21:15:11,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 752 transitions, 13697 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 21:15:11,083 INFO L231 Difference]: Finished difference. Result has 510 places, 739 transitions, 12267 flow [2024-06-27 21:15:11,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11952, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=683, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12267, PETRI_PLACES=510, PETRI_TRANSITIONS=739} [2024-06-27 21:15:11,084 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 469 predicate places. [2024-06-27 21:15:11,084 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 739 transitions, 12267 flow [2024-06-27 21:15:11,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:11,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:11,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:11,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-27 21:15:11,085 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:15:11,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:11,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1941801786, now seen corresponding path program 4 times [2024-06-27 21:15:11,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:11,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587172252] [2024-06-27 21:15:11,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:11,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:11,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:12,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:12,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:12,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587172252] [2024-06-27 21:15:12,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587172252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:12,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:12,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:15:12,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280414482] [2024-06-27 21:15:12,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:12,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:15:12,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:12,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:15:12,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:15:12,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:15:12,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 739 transitions, 12267 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:12,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:12,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:15:12,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:14,010 INFO L124 PetriNetUnfolderBase]: 4071/6229 cut-off events. [2024-06-27 21:15:14,011 INFO L125 PetriNetUnfolderBase]: For 805032/805034 co-relation queries the response was YES. [2024-06-27 21:15:14,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59375 conditions, 6229 events. 4071/6229 cut-off events. For 805032/805034 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 36287 event pairs, 660 based on Foata normal form. 6/6234 useless extension candidates. Maximal degree in co-relation 59149. Up to 5804 conditions per place. [2024-06-27 21:15:14,128 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 675 selfloop transitions, 87 changer transitions 0/766 dead transitions. [2024-06-27 21:15:14,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 766 transitions, 14105 flow [2024-06-27 21:15:14,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:15:14,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:15:14,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 21:15:14,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-27 21:15:14,129 INFO L175 Difference]: Start difference. First operand has 510 places, 739 transitions, 12267 flow. Second operand 9 states and 159 transitions. [2024-06-27 21:15:14,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 766 transitions, 14105 flow [2024-06-27 21:15:20,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 766 transitions, 13968 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-27 21:15:20,614 INFO L231 Difference]: Finished difference. Result has 514 places, 745 transitions, 12508 flow [2024-06-27 21:15:20,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12130, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=739, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=652, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12508, PETRI_PLACES=514, PETRI_TRANSITIONS=745} [2024-06-27 21:15:20,615 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 473 predicate places. [2024-06-27 21:15:20,615 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 745 transitions, 12508 flow [2024-06-27 21:15:20,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:20,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:20,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:20,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-27 21:15:20,615 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:15:20,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:20,616 INFO L85 PathProgramCache]: Analyzing trace with hash -2116686536, now seen corresponding path program 5 times [2024-06-27 21:15:20,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:20,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817254006] [2024-06-27 21:15:20,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:20,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:20,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:21,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:21,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:21,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817254006] [2024-06-27 21:15:21,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817254006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:21,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:21,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:15:21,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979634504] [2024-06-27 21:15:21,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:21,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:15:21,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:21,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:15:21,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:15:21,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:15:21,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 745 transitions, 12508 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:21,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:21,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:15:21,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:23,554 INFO L124 PetriNetUnfolderBase]: 4135/6326 cut-off events. [2024-06-27 21:15:23,554 INFO L125 PetriNetUnfolderBase]: For 864078/864078 co-relation queries the response was YES. [2024-06-27 21:15:23,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60799 conditions, 6326 events. 4135/6326 cut-off events. For 864078/864078 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 36918 event pairs, 664 based on Foata normal form. 12/6337 useless extension candidates. Maximal degree in co-relation 60573. Up to 5954 conditions per place. [2024-06-27 21:15:23,672 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 720 selfloop transitions, 43 changer transitions 0/767 dead transitions. [2024-06-27 21:15:23,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 767 transitions, 14315 flow [2024-06-27 21:15:23,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:15:23,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:15:23,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 21:15:23,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45357142857142857 [2024-06-27 21:15:23,673 INFO L175 Difference]: Start difference. First operand has 514 places, 745 transitions, 12508 flow. Second operand 7 states and 127 transitions. [2024-06-27 21:15:23,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 767 transitions, 14315 flow [2024-06-27 21:15:29,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 767 transitions, 14033 flow, removed 70 selfloop flow, removed 6 redundant places. [2024-06-27 21:15:29,816 INFO L231 Difference]: Finished difference. Result has 516 places, 748 transitions, 12390 flow [2024-06-27 21:15:29,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12226, PETRI_DIFFERENCE_MINUEND_PLACES=508, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=702, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12390, PETRI_PLACES=516, PETRI_TRANSITIONS=748} [2024-06-27 21:15:29,817 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 475 predicate places. [2024-06-27 21:15:29,817 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 748 transitions, 12390 flow [2024-06-27 21:15:29,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:29,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:29,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:29,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-27 21:15:29,818 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:15:29,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:29,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1941624156, now seen corresponding path program 5 times [2024-06-27 21:15:29,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:29,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032783623] [2024-06-27 21:15:29,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:29,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:29,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:30,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:30,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:30,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032783623] [2024-06-27 21:15:30,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032783623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:30,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:30,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:15:30,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979296699] [2024-06-27 21:15:30,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:30,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:15:30,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:30,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:15:30,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:15:30,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:15:30,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 748 transitions, 12390 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:30,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:30,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:15:30,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:32,831 INFO L124 PetriNetUnfolderBase]: 4187/6400 cut-off events. [2024-06-27 21:15:32,831 INFO L125 PetriNetUnfolderBase]: For 843647/843649 co-relation queries the response was YES. [2024-06-27 21:15:32,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62173 conditions, 6400 events. 4187/6400 cut-off events. For 843647/843649 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 37394 event pairs, 677 based on Foata normal form. 6/6405 useless extension candidates. Maximal degree in co-relation 61945. Up to 5872 conditions per place. [2024-06-27 21:15:32,961 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 660 selfloop transitions, 131 changer transitions 0/795 dead transitions. [2024-06-27 21:15:32,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 795 transitions, 14831 flow [2024-06-27 21:15:32,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:15:32,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:15:32,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-27 21:15:32,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-06-27 21:15:32,962 INFO L175 Difference]: Start difference. First operand has 516 places, 748 transitions, 12390 flow. Second operand 10 states and 184 transitions. [2024-06-27 21:15:32,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 795 transitions, 14831 flow [2024-06-27 21:15:40,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 795 transitions, 14740 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 21:15:40,469 INFO L231 Difference]: Finished difference. Result has 523 places, 767 transitions, 13148 flow [2024-06-27 21:15:40,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12299, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=623, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13148, PETRI_PLACES=523, PETRI_TRANSITIONS=767} [2024-06-27 21:15:40,470 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 482 predicate places. [2024-06-27 21:15:40,470 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 767 transitions, 13148 flow [2024-06-27 21:15:40,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:40,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:40,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:40,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-27 21:15:40,471 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:15:40,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:40,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1941623784, now seen corresponding path program 7 times [2024-06-27 21:15:40,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:40,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346888157] [2024-06-27 21:15:40,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:40,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:40,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:41,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:41,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:41,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346888157] [2024-06-27 21:15:41,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346888157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:41,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:41,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:15:41,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566572533] [2024-06-27 21:15:41,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:41,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:15:41,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:41,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:15:41,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:15:41,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:15:41,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 767 transitions, 13148 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:41,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:41,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:15:41,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:43,667 INFO L124 PetriNetUnfolderBase]: 4184/6395 cut-off events. [2024-06-27 21:15:43,667 INFO L125 PetriNetUnfolderBase]: For 834106/834106 co-relation queries the response was YES. [2024-06-27 21:15:43,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62929 conditions, 6395 events. 4184/6395 cut-off events. For 834106/834106 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 37379 event pairs, 711 based on Foata normal form. 1/6395 useless extension candidates. Maximal degree in co-relation 62699. Up to 5830 conditions per place. [2024-06-27 21:15:43,773 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 634 selfloop transitions, 151 changer transitions 0/789 dead transitions. [2024-06-27 21:15:43,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 789 transitions, 14774 flow [2024-06-27 21:15:43,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:15:43,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:15:43,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 21:15:43,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465625 [2024-06-27 21:15:43,774 INFO L175 Difference]: Start difference. First operand has 523 places, 767 transitions, 13148 flow. Second operand 8 states and 149 transitions. [2024-06-27 21:15:43,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 789 transitions, 14774 flow [2024-06-27 21:15:51,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 789 transitions, 14410 flow, removed 124 selfloop flow, removed 7 redundant places. [2024-06-27 21:15:51,138 INFO L231 Difference]: Finished difference. Result has 524 places, 767 transitions, 13098 flow [2024-06-27 21:15:51,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12784, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=767, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=616, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13098, PETRI_PLACES=524, PETRI_TRANSITIONS=767} [2024-06-27 21:15:51,138 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 483 predicate places. [2024-06-27 21:15:51,138 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 767 transitions, 13098 flow [2024-06-27 21:15:51,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:51,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:51,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:51,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-27 21:15:51,139 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:15:51,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:51,139 INFO L85 PathProgramCache]: Analyzing trace with hash -2125264360, now seen corresponding path program 6 times [2024-06-27 21:15:51,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:51,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422700487] [2024-06-27 21:15:51,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:51,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:51,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:52,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:52,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:52,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422700487] [2024-06-27 21:15:52,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422700487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:52,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:52,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:15:52,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762063996] [2024-06-27 21:15:52,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:52,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:15:52,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:52,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:15:52,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:15:52,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:15:52,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 767 transitions, 13098 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:52,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:52,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:15:52,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:54,304 INFO L124 PetriNetUnfolderBase]: 4182/6391 cut-off events. [2024-06-27 21:15:54,304 INFO L125 PetriNetUnfolderBase]: For 840810/840810 co-relation queries the response was YES. [2024-06-27 21:15:54,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62459 conditions, 6391 events. 4182/6391 cut-off events. For 840810/840810 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 37357 event pairs, 696 based on Foata normal form. 6/6396 useless extension candidates. Maximal degree in co-relation 62228. Up to 6069 conditions per place. [2024-06-27 21:15:54,416 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 720 selfloop transitions, 60 changer transitions 0/784 dead transitions. [2024-06-27 21:15:54,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 784 transitions, 14846 flow [2024-06-27 21:15:54,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:15:54,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:15:54,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 21:15:54,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-27 21:15:54,418 INFO L175 Difference]: Start difference. First operand has 524 places, 767 transitions, 13098 flow. Second operand 8 states and 138 transitions. [2024-06-27 21:15:54,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 784 transitions, 14846 flow [2024-06-27 21:16:01,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 784 transitions, 14518 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 21:16:01,254 INFO L231 Difference]: Finished difference. Result has 526 places, 770 transitions, 13018 flow [2024-06-27 21:16:01,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12770, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=767, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=707, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13018, PETRI_PLACES=526, PETRI_TRANSITIONS=770} [2024-06-27 21:16:01,254 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 485 predicate places. [2024-06-27 21:16:01,254 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 770 transitions, 13018 flow [2024-06-27 21:16:01,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:01,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:01,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:01,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-27 21:16:01,255 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:16:01,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:01,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1150765636, now seen corresponding path program 7 times [2024-06-27 21:16:01,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:01,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536494825] [2024-06-27 21:16:01,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:01,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:01,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:02,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:02,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:02,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536494825] [2024-06-27 21:16:02,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536494825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:02,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:02,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:16:02,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586804687] [2024-06-27 21:16:02,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:02,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:16:02,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:02,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:16:02,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:16:02,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:16:02,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 770 transitions, 13018 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:02,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:02,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:16:02,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:04,353 INFO L124 PetriNetUnfolderBase]: 4296/6564 cut-off events. [2024-06-27 21:16:04,354 INFO L125 PetriNetUnfolderBase]: For 873327/873329 co-relation queries the response was YES. [2024-06-27 21:16:04,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64603 conditions, 6564 events. 4296/6564 cut-off events. For 873327/873329 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 38498 event pairs, 712 based on Foata normal form. 6/6569 useless extension candidates. Maximal degree in co-relation 64371. Up to 5702 conditions per place. [2024-06-27 21:16:04,486 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 630 selfloop transitions, 215 changer transitions 0/849 dead transitions. [2024-06-27 21:16:04,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 849 transitions, 16001 flow [2024-06-27 21:16:04,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 21:16:04,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 21:16:04,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 241 transitions. [2024-06-27 21:16:04,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4303571428571429 [2024-06-27 21:16:04,488 INFO L175 Difference]: Start difference. First operand has 526 places, 770 transitions, 13018 flow. Second operand 14 states and 241 transitions. [2024-06-27 21:16:04,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 849 transitions, 16001 flow [2024-06-27 21:16:11,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 849 transitions, 15756 flow, removed 70 selfloop flow, removed 6 redundant places. [2024-06-27 21:16:11,105 INFO L231 Difference]: Finished difference. Result has 536 places, 804 transitions, 14070 flow [2024-06-27 21:16:11,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12773, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=770, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=14070, PETRI_PLACES=536, PETRI_TRANSITIONS=804} [2024-06-27 21:16:11,105 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 495 predicate places. [2024-06-27 21:16:11,106 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 804 transitions, 14070 flow [2024-06-27 21:16:11,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:11,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:11,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:11,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-27 21:16:11,106 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:16:11,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:11,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1269030946, now seen corresponding path program 8 times [2024-06-27 21:16:11,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:11,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525933949] [2024-06-27 21:16:11,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:11,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:11,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:11,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:11,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:11,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525933949] [2024-06-27 21:16:11,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525933949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:11,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:11,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:16:11,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171093425] [2024-06-27 21:16:11,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:11,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:16:11,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:11,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:16:11,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:16:11,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:16:11,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 804 transitions, 14070 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:11,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:11,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:16:11,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:14,261 INFO L124 PetriNetUnfolderBase]: 4316/6590 cut-off events. [2024-06-27 21:16:14,261 INFO L125 PetriNetUnfolderBase]: For 901360/901362 co-relation queries the response was YES. [2024-06-27 21:16:14,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66414 conditions, 6590 events. 4316/6590 cut-off events. For 901360/901362 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 38646 event pairs, 714 based on Foata normal form. 6/6595 useless extension candidates. Maximal degree in co-relation 66179. Up to 6196 conditions per place. [2024-06-27 21:16:14,398 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 758 selfloop transitions, 78 changer transitions 0/840 dead transitions. [2024-06-27 21:16:14,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 840 transitions, 16137 flow [2024-06-27 21:16:14,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 21:16:14,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 21:16:14,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 214 transitions. [2024-06-27 21:16:14,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115384615384615 [2024-06-27 21:16:14,399 INFO L175 Difference]: Start difference. First operand has 536 places, 804 transitions, 14070 flow. Second operand 13 states and 214 transitions. [2024-06-27 21:16:14,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 840 transitions, 16137 flow [2024-06-27 21:16:21,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 840 transitions, 15632 flow, removed 137 selfloop flow, removed 9 redundant places. [2024-06-27 21:16:21,960 INFO L231 Difference]: Finished difference. Result has 540 places, 808 transitions, 13888 flow [2024-06-27 21:16:21,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13619, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=804, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=726, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=13888, PETRI_PLACES=540, PETRI_TRANSITIONS=808} [2024-06-27 21:16:21,961 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 499 predicate places. [2024-06-27 21:16:21,961 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 808 transitions, 13888 flow [2024-06-27 21:16:21,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:21,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:21,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:21,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-27 21:16:21,961 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:16:21,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:21,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1268853316, now seen corresponding path program 9 times [2024-06-27 21:16:21,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:21,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331925645] [2024-06-27 21:16:21,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:21,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:21,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:23,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:23,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:23,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331925645] [2024-06-27 21:16:23,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331925645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:23,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:23,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:16:23,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595108442] [2024-06-27 21:16:23,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:23,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:16:23,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:23,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:16:23,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:16:23,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:16:23,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 808 transitions, 13888 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:23,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:23,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:16:23,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:25,440 INFO L124 PetriNetUnfolderBase]: 4331/6611 cut-off events. [2024-06-27 21:16:25,440 INFO L125 PetriNetUnfolderBase]: For 891535/891537 co-relation queries the response was YES. [2024-06-27 21:16:25,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66243 conditions, 6611 events. 4331/6611 cut-off events. For 891535/891537 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 38782 event pairs, 731 based on Foata normal form. 4/6614 useless extension candidates. Maximal degree in co-relation 66006. Up to 6309 conditions per place. [2024-06-27 21:16:25,565 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 793 selfloop transitions, 62 changer transitions 0/859 dead transitions. [2024-06-27 21:16:25,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 859 transitions, 16120 flow [2024-06-27 21:16:25,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 21:16:25,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 21:16:25,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 208 transitions. [2024-06-27 21:16:25,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 21:16:25,566 INFO L175 Difference]: Start difference. First operand has 540 places, 808 transitions, 13888 flow. Second operand 13 states and 208 transitions. [2024-06-27 21:16:25,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 859 transitions, 16120 flow [2024-06-27 21:16:33,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 859 transitions, 15859 flow, removed 53 selfloop flow, removed 10 redundant places. [2024-06-27 21:16:33,034 INFO L231 Difference]: Finished difference. Result has 548 places, 832 transitions, 14241 flow [2024-06-27 21:16:33,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13680, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=808, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=750, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=14241, PETRI_PLACES=548, PETRI_TRANSITIONS=832} [2024-06-27 21:16:33,035 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 507 predicate places. [2024-06-27 21:16:33,035 INFO L495 AbstractCegarLoop]: Abstraction has has 548 places, 832 transitions, 14241 flow [2024-06-27 21:16:33,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:33,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:33,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:33,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-27 21:16:33,036 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:16:33,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:33,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1151403452, now seen corresponding path program 6 times [2024-06-27 21:16:33,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:33,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741693398] [2024-06-27 21:16:33,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:33,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:33,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:33,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:33,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:33,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741693398] [2024-06-27 21:16:33,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741693398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:33,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:33,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:16:33,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674922333] [2024-06-27 21:16:33,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:33,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:16:33,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:33,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:16:33,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:16:34,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:16:34,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 832 transitions, 14241 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:34,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:34,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:16:34,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:36,332 INFO L124 PetriNetUnfolderBase]: 4375/6687 cut-off events. [2024-06-27 21:16:36,332 INFO L125 PetriNetUnfolderBase]: For 984060/984062 co-relation queries the response was YES. [2024-06-27 21:16:36,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67195 conditions, 6687 events. 4375/6687 cut-off events. For 984060/984062 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 39473 event pairs, 737 based on Foata normal form. 14/6700 useless extension candidates. Maximal degree in co-relation 66952. Up to 6296 conditions per place. [2024-06-27 21:16:36,451 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 788 selfloop transitions, 67 changer transitions 0/859 dead transitions. [2024-06-27 21:16:36,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 557 places, 859 transitions, 16183 flow [2024-06-27 21:16:36,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:16:36,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:16:36,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-27 21:16:36,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43 [2024-06-27 21:16:36,452 INFO L175 Difference]: Start difference. First operand has 548 places, 832 transitions, 14241 flow. Second operand 10 states and 172 transitions. [2024-06-27 21:16:36,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 557 places, 859 transitions, 16183 flow [2024-06-27 21:16:44,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 859 transitions, 15965 flow, removed 77 selfloop flow, removed 4 redundant places. [2024-06-27 21:16:44,314 INFO L231 Difference]: Finished difference. Result has 554 places, 833 transitions, 14197 flow [2024-06-27 21:16:44,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14023, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=832, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=765, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14197, PETRI_PLACES=554, PETRI_TRANSITIONS=833} [2024-06-27 21:16:44,315 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 513 predicate places. [2024-06-27 21:16:44,315 INFO L495 AbstractCegarLoop]: Abstraction has has 554 places, 833 transitions, 14197 flow [2024-06-27 21:16:44,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:44,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:44,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:44,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-27 21:16:44,315 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:16:44,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:44,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1120438690, now seen corresponding path program 10 times [2024-06-27 21:16:44,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:44,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783961573] [2024-06-27 21:16:44,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:44,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:44,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:45,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:45,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:45,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783961573] [2024-06-27 21:16:45,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783961573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:45,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:45,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:16:45,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175176512] [2024-06-27 21:16:45,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:45,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:16:45,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:45,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:16:45,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:16:45,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:16:45,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 554 places, 833 transitions, 14197 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:45,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:45,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:16:45,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:47,651 INFO L124 PetriNetUnfolderBase]: 4483/6826 cut-off events. [2024-06-27 21:16:47,652 INFO L125 PetriNetUnfolderBase]: For 974891/974893 co-relation queries the response was YES. [2024-06-27 21:16:47,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69569 conditions, 6826 events. 4483/6826 cut-off events. For 974891/974893 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 40062 event pairs, 746 based on Foata normal form. 6/6831 useless extension candidates. Maximal degree in co-relation 69324. Up to 6175 conditions per place. [2024-06-27 21:16:47,791 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 712 selfloop transitions, 195 changer transitions 0/911 dead transitions. [2024-06-27 21:16:47,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 566 places, 911 transitions, 17381 flow [2024-06-27 21:16:47,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 21:16:47,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 21:16:47,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 224 transitions. [2024-06-27 21:16:47,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4307692307692308 [2024-06-27 21:16:47,793 INFO L175 Difference]: Start difference. First operand has 554 places, 833 transitions, 14197 flow. Second operand 13 states and 224 transitions. [2024-06-27 21:16:47,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 566 places, 911 transitions, 17381 flow [2024-06-27 21:16:53,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 911 transitions, 17208 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-27 21:16:53,661 INFO L231 Difference]: Finished difference. Result has 560 places, 866 transitions, 15315 flow [2024-06-27 21:16:53,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14024, PETRI_DIFFERENCE_MINUEND_PLACES=545, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=833, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=15315, PETRI_PLACES=560, PETRI_TRANSITIONS=866} [2024-06-27 21:16:53,662 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 519 predicate places. [2024-06-27 21:16:53,662 INFO L495 AbstractCegarLoop]: Abstraction has has 560 places, 866 transitions, 15315 flow [2024-06-27 21:16:53,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:53,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:53,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:53,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-27 21:16:53,662 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:16:53,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:53,663 INFO L85 PathProgramCache]: Analyzing trace with hash 482019908, now seen corresponding path program 11 times [2024-06-27 21:16:53,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:53,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465747994] [2024-06-27 21:16:53,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:53,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:53,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:54,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:54,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:54,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465747994] [2024-06-27 21:16:54,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465747994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:54,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:54,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:16:54,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415398318] [2024-06-27 21:16:54,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:54,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:16:54,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:54,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:16:54,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:16:54,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:16:54,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 866 transitions, 15315 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:54,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:54,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:16:54,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:57,047 INFO L124 PetriNetUnfolderBase]: 4514/6863 cut-off events. [2024-06-27 21:16:57,047 INFO L125 PetriNetUnfolderBase]: For 1002852/1002854 co-relation queries the response was YES. [2024-06-27 21:16:57,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71615 conditions, 6863 events. 4514/6863 cut-off events. For 1002852/1002854 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 40171 event pairs, 748 based on Foata normal form. 4/6866 useless extension candidates. Maximal degree in co-relation 71367. Up to 6353 conditions per place. [2024-06-27 21:16:57,185 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 756 selfloop transitions, 158 changer transitions 0/918 dead transitions. [2024-06-27 21:16:57,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 918 transitions, 18058 flow [2024-06-27 21:16:57,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:16:57,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:16:57,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-27 21:16:57,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.435 [2024-06-27 21:16:57,187 INFO L175 Difference]: Start difference. First operand has 560 places, 866 transitions, 15315 flow. Second operand 10 states and 174 transitions. [2024-06-27 21:16:57,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 918 transitions, 18058 flow [2024-06-27 21:17:05,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 561 places, 918 transitions, 17469 flow, removed 194 selfloop flow, removed 8 redundant places. [2024-06-27 21:17:05,311 INFO L231 Difference]: Finished difference. Result has 563 places, 890 transitions, 15650 flow [2024-06-27 21:17:05,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14826, PETRI_DIFFERENCE_MINUEND_PLACES=552, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=866, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=721, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15650, PETRI_PLACES=563, PETRI_TRANSITIONS=890} [2024-06-27 21:17:05,312 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 522 predicate places. [2024-06-27 21:17:05,312 INFO L495 AbstractCegarLoop]: Abstraction has has 563 places, 890 transitions, 15650 flow [2024-06-27 21:17:05,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:05,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:05,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:05,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-27 21:17:05,313 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:17:05,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:05,314 INFO L85 PathProgramCache]: Analyzing trace with hash 836698658, now seen corresponding path program 12 times [2024-06-27 21:17:05,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:05,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087208041] [2024-06-27 21:17:05,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:05,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:05,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:06,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:06,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:06,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087208041] [2024-06-27 21:17:06,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087208041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:06,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:06,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:17:06,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906143888] [2024-06-27 21:17:06,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:06,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:17:06,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:06,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:17:06,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:17:06,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:17:06,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 890 transitions, 15650 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:06,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:06,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:17:06,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:08,808 INFO L124 PetriNetUnfolderBase]: 4564/6928 cut-off events. [2024-06-27 21:17:08,809 INFO L125 PetriNetUnfolderBase]: For 1061456/1061458 co-relation queries the response was YES. [2024-06-27 21:17:08,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73549 conditions, 6928 events. 4564/6928 cut-off events. For 1061456/1061458 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 40545 event pairs, 636 based on Foata normal form. 4/6931 useless extension candidates. Maximal degree in co-relation 73298. Up to 5823 conditions per place. [2024-06-27 21:17:08,945 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 701 selfloop transitions, 274 changer transitions 0/979 dead transitions. [2024-06-27 21:17:08,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 979 transitions, 19099 flow [2024-06-27 21:17:08,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:17:08,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:17:08,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 21:17:08,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2024-06-27 21:17:08,946 INFO L175 Difference]: Start difference. First operand has 563 places, 890 transitions, 15650 flow. Second operand 9 states and 164 transitions. [2024-06-27 21:17:08,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 979 transitions, 19099 flow [2024-06-27 21:17:17,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 567 places, 979 transitions, 18713 flow, removed 158 selfloop flow, removed 4 redundant places. [2024-06-27 21:17:17,205 INFO L231 Difference]: Finished difference. Result has 571 places, 933 transitions, 16864 flow [2024-06-27 21:17:17,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15322, PETRI_DIFFERENCE_MINUEND_PLACES=559, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=890, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=627, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16864, PETRI_PLACES=571, PETRI_TRANSITIONS=933} [2024-06-27 21:17:17,206 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 530 predicate places. [2024-06-27 21:17:17,206 INFO L495 AbstractCegarLoop]: Abstraction has has 571 places, 933 transitions, 16864 flow [2024-06-27 21:17:17,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:17,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:17,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:17,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-27 21:17:17,207 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:17:17,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:17,207 INFO L85 PathProgramCache]: Analyzing trace with hash 836282948, now seen corresponding path program 13 times [2024-06-27 21:17:17,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:17,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867188222] [2024-06-27 21:17:17,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:17,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:17,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:18,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:18,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:18,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867188222] [2024-06-27 21:17:18,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867188222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:18,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:18,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:17:18,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447408953] [2024-06-27 21:17:18,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:18,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:17:18,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:18,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:17:18,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:17:18,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:17:18,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 571 places, 933 transitions, 16864 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:18,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:18,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:17:18,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:20,794 INFO L124 PetriNetUnfolderBase]: 4572/6948 cut-off events. [2024-06-27 21:17:20,794 INFO L125 PetriNetUnfolderBase]: For 1080804/1080806 co-relation queries the response was YES. [2024-06-27 21:17:20,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74565 conditions, 6948 events. 4572/6948 cut-off events. For 1080804/1080806 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 40762 event pairs, 738 based on Foata normal form. 8/6955 useless extension candidates. Maximal degree in co-relation 74310. Up to 6245 conditions per place. [2024-06-27 21:17:20,944 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 675 selfloop transitions, 285 changer transitions 0/964 dead transitions. [2024-06-27 21:17:20,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 582 places, 964 transitions, 18973 flow [2024-06-27 21:17:20,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:17:20,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:17:20,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 205 transitions. [2024-06-27 21:17:20,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4270833333333333 [2024-06-27 21:17:20,945 INFO L175 Difference]: Start difference. First operand has 571 places, 933 transitions, 16864 flow. Second operand 12 states and 205 transitions. [2024-06-27 21:17:20,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 582 places, 964 transitions, 18973 flow [2024-06-27 21:17:30,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 576 places, 964 transitions, 18690 flow, removed 119 selfloop flow, removed 6 redundant places. [2024-06-27 21:17:30,916 INFO L231 Difference]: Finished difference. Result has 577 places, 939 transitions, 17295 flow [2024-06-27 21:17:30,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=16581, PETRI_DIFFERENCE_MINUEND_PLACES=565, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=933, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=649, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=17295, PETRI_PLACES=577, PETRI_TRANSITIONS=939} [2024-06-27 21:17:30,916 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 536 predicate places. [2024-06-27 21:17:30,916 INFO L495 AbstractCegarLoop]: Abstraction has has 577 places, 939 transitions, 17295 flow [2024-06-27 21:17:30,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:30,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:30,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:30,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-27 21:17:30,917 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:17:30,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:30,918 INFO L85 PathProgramCache]: Analyzing trace with hash 177644894, now seen corresponding path program 7 times [2024-06-27 21:17:30,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:30,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072595925] [2024-06-27 21:17:30,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:30,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:30,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:31,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:31,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:31,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072595925] [2024-06-27 21:17:31,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072595925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:31,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:31,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:17:31,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374159268] [2024-06-27 21:17:31,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:31,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:17:31,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:31,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:17:31,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:17:32,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:17:32,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 577 places, 939 transitions, 17295 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:32,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:32,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:17:32,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:34,851 INFO L124 PetriNetUnfolderBase]: 4621/7026 cut-off events. [2024-06-27 21:17:34,851 INFO L125 PetriNetUnfolderBase]: For 1089008/1089008 co-relation queries the response was YES. [2024-06-27 21:17:34,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74678 conditions, 7026 events. 4621/7026 cut-off events. For 1089008/1089008 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 41288 event pairs, 614 based on Foata normal form. 12/7037 useless extension candidates. Maximal degree in co-relation 74424. Up to 6418 conditions per place. [2024-06-27 21:17:34,978 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 821 selfloop transitions, 146 changer transitions 0/971 dead transitions. [2024-06-27 21:17:34,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 971 transitions, 19544 flow [2024-06-27 21:17:34,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:17:34,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:17:34,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 21:17:34,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 21:17:34,979 INFO L175 Difference]: Start difference. First operand has 577 places, 939 transitions, 17295 flow. Second operand 9 states and 160 transitions. [2024-06-27 21:17:34,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 585 places, 971 transitions, 19544 flow [2024-06-27 21:17:44,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 576 places, 971 transitions, 18901 flow, removed 47 selfloop flow, removed 9 redundant places. [2024-06-27 21:17:44,261 INFO L231 Difference]: Finished difference. Result has 579 places, 946 transitions, 17149 flow [2024-06-27 21:17:44,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=16652, PETRI_DIFFERENCE_MINUEND_PLACES=568, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=939, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=793, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17149, PETRI_PLACES=579, PETRI_TRANSITIONS=946} [2024-06-27 21:17:44,262 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 538 predicate places. [2024-06-27 21:17:44,262 INFO L495 AbstractCegarLoop]: Abstraction has has 579 places, 946 transitions, 17149 flow [2024-06-27 21:17:44,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:44,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:44,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:44,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-27 21:17:44,262 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:17:44,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:44,263 INFO L85 PathProgramCache]: Analyzing trace with hash 340890, now seen corresponding path program 14 times [2024-06-27 21:17:44,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:44,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044601144] [2024-06-27 21:17:44,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:44,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:44,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:45,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:45,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:45,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044601144] [2024-06-27 21:17:45,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044601144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:45,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:45,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:17:45,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34210128] [2024-06-27 21:17:45,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:45,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:17:45,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:45,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:17:45,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:17:45,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:17:45,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 579 places, 946 transitions, 17149 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:45,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:45,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:17:45,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:48,256 INFO L124 PetriNetUnfolderBase]: 4801/7281 cut-off events. [2024-06-27 21:17:48,256 INFO L125 PetriNetUnfolderBase]: For 1218274/1218276 co-relation queries the response was YES. [2024-06-27 21:17:48,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81102 conditions, 7281 events. 4801/7281 cut-off events. For 1218274/1218276 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 42892 event pairs, 631 based on Foata normal form. 6/7286 useless extension candidates. Maximal degree in co-relation 80845. Up to 6308 conditions per place. [2024-06-27 21:17:48,403 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 741 selfloop transitions, 270 changer transitions 0/1015 dead transitions. [2024-06-27 21:17:48,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 1015 transitions, 21165 flow [2024-06-27 21:17:48,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:17:48,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:17:48,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 211 transitions. [2024-06-27 21:17:48,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4395833333333333 [2024-06-27 21:17:48,404 INFO L175 Difference]: Start difference. First operand has 579 places, 946 transitions, 17149 flow. Second operand 12 states and 211 transitions. [2024-06-27 21:17:48,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 1015 transitions, 21165 flow [2024-06-27 21:17:58,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 585 places, 1015 transitions, 20968 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 21:17:58,131 INFO L231 Difference]: Finished difference. Result has 588 places, 982 transitions, 18852 flow [2024-06-27 21:17:58,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=16952, PETRI_DIFFERENCE_MINUEND_PLACES=574, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=946, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=691, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=18852, PETRI_PLACES=588, PETRI_TRANSITIONS=982} [2024-06-27 21:17:58,131 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 547 predicate places. [2024-06-27 21:17:58,132 INFO L495 AbstractCegarLoop]: Abstraction has has 588 places, 982 transitions, 18852 flow [2024-06-27 21:17:58,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:58,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:58,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:58,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-27 21:17:58,132 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:17:58,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:58,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1645573564, now seen corresponding path program 15 times [2024-06-27 21:17:58,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:58,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849893356] [2024-06-27 21:17:58,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:58,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:58,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:59,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:59,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:59,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849893356] [2024-06-27 21:17:59,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849893356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:59,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:59,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:17:59,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807567843] [2024-06-27 21:17:59,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:59,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:17:59,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:59,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:17:59,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:17:59,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:17:59,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 588 places, 982 transitions, 18852 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:59,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:59,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:17:59,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:02,441 INFO L124 PetriNetUnfolderBase]: 4809/7293 cut-off events. [2024-06-27 21:18:02,441 INFO L125 PetriNetUnfolderBase]: For 1231916/1231918 co-relation queries the response was YES. [2024-06-27 21:18:02,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82057 conditions, 7293 events. 4809/7293 cut-off events. For 1231916/1231918 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 42971 event pairs, 768 based on Foata normal form. 8/7300 useless extension candidates. Maximal degree in co-relation 81796. Up to 6897 conditions per place. [2024-06-27 21:18:02,605 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 881 selfloop transitions, 122 changer transitions 0/1007 dead transitions. [2024-06-27 21:18:02,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 598 places, 1007 transitions, 21080 flow [2024-06-27 21:18:02,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:18:02,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:18:02,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-27 21:18:02,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41363636363636364 [2024-06-27 21:18:02,617 INFO L175 Difference]: Start difference. First operand has 588 places, 982 transitions, 18852 flow. Second operand 11 states and 182 transitions. [2024-06-27 21:18:02,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 598 places, 1007 transitions, 21080 flow [2024-06-27 21:18:12,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 589 places, 1007 transitions, 20450 flow, removed 174 selfloop flow, removed 9 redundant places. [2024-06-27 21:18:12,396 INFO L231 Difference]: Finished difference. Result has 590 places, 989 transitions, 18659 flow [2024-06-27 21:18:12,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=18237, PETRI_DIFFERENCE_MINUEND_PLACES=579, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=982, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=861, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=18659, PETRI_PLACES=590, PETRI_TRANSITIONS=989} [2024-06-27 21:18:12,396 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 549 predicate places. [2024-06-27 21:18:12,396 INFO L495 AbstractCegarLoop]: Abstraction has has 590 places, 989 transitions, 18659 flow [2024-06-27 21:18:12,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:12,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:12,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:18:12,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-27 21:18:12,397 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:18:12,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:12,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1467782240, now seen corresponding path program 8 times [2024-06-27 21:18:12,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:12,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387729345] [2024-06-27 21:18:12,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:12,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:12,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:13,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:13,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:13,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387729345] [2024-06-27 21:18:13,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387729345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:13,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:13,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:18:13,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555889185] [2024-06-27 21:18:13,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:13,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:18:13,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:13,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:18:13,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:18:13,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:18:13,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 590 places, 989 transitions, 18659 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:13,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:13,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:18:13,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:16,515 INFO L124 PetriNetUnfolderBase]: 4909/7453 cut-off events. [2024-06-27 21:18:16,515 INFO L125 PetriNetUnfolderBase]: For 1358777/1358779 co-relation queries the response was YES. [2024-06-27 21:18:16,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85046 conditions, 7453 events. 4909/7453 cut-off events. For 1358777/1358779 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 44156 event pairs, 662 based on Foata normal form. 10/7462 useless extension candidates. Maximal degree in co-relation 84783. Up to 6701 conditions per place. [2024-06-27 21:18:16,666 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 900 selfloop transitions, 116 changer transitions 0/1020 dead transitions. [2024-06-27 21:18:16,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 598 places, 1020 transitions, 21360 flow [2024-06-27 21:18:16,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:18:16,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:18:16,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 21:18:16,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-27 21:18:16,668 INFO L175 Difference]: Start difference. First operand has 590 places, 989 transitions, 18659 flow. Second operand 9 states and 161 transitions. [2024-06-27 21:18:16,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 598 places, 1020 transitions, 21360 flow [2024-06-27 21:18:27,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 589 places, 1020 transitions, 20955 flow, removed 72 selfloop flow, removed 9 redundant places. [2024-06-27 21:18:27,323 INFO L231 Difference]: Finished difference. Result has 590 places, 991 transitions, 18564 flow [2024-06-27 21:18:27,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=18254, PETRI_DIFFERENCE_MINUEND_PLACES=581, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=989, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=874, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18564, PETRI_PLACES=590, PETRI_TRANSITIONS=991} [2024-06-27 21:18:27,324 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 549 predicate places. [2024-06-27 21:18:27,324 INFO L495 AbstractCegarLoop]: Abstraction has has 590 places, 991 transitions, 18564 flow [2024-06-27 21:18:27,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:27,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:27,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:18:27,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-27 21:18:27,325 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:18:27,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:27,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1474455424, now seen corresponding path program 16 times [2024-06-27 21:18:27,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:27,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273342091] [2024-06-27 21:18:27,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:27,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:27,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:28,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:28,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:28,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273342091] [2024-06-27 21:18:28,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273342091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:28,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:28,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:18:28,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620434563] [2024-06-27 21:18:28,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:28,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:18:28,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:28,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:18:28,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:18:28,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:18:28,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 590 places, 991 transitions, 18564 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:28,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:28,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:18:28,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:31,383 INFO L124 PetriNetUnfolderBase]: 4919/7459 cut-off events. [2024-06-27 21:18:31,383 INFO L125 PetriNetUnfolderBase]: For 1332304/1332306 co-relation queries the response was YES. [2024-06-27 21:18:31,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85336 conditions, 7459 events. 4919/7459 cut-off events. For 1332304/1332306 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 44071 event pairs, 679 based on Foata normal form. 4/7462 useless extension candidates. Maximal degree in co-relation 85072. Up to 6934 conditions per place. [2024-06-27 21:18:31,541 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 878 selfloop transitions, 151 changer transitions 0/1033 dead transitions. [2024-06-27 21:18:31,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 601 places, 1033 transitions, 21324 flow [2024-06-27 21:18:31,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:18:31,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:18:31,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 199 transitions. [2024-06-27 21:18:31,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41458333333333336 [2024-06-27 21:18:31,543 INFO L175 Difference]: Start difference. First operand has 590 places, 991 transitions, 18564 flow. Second operand 12 states and 199 transitions. [2024-06-27 21:18:31,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 601 places, 1033 transitions, 21324 flow [2024-06-27 21:18:42,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 1033 transitions, 21169 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 21:18:42,306 INFO L231 Difference]: Finished difference. Result has 600 places, 1009 transitions, 19163 flow [2024-06-27 21:18:42,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=18409, PETRI_DIFFERENCE_MINUEND_PLACES=585, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=991, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=846, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=19163, PETRI_PLACES=600, PETRI_TRANSITIONS=1009} [2024-06-27 21:18:42,307 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 559 predicate places. [2024-06-27 21:18:42,307 INFO L495 AbstractCegarLoop]: Abstraction has has 600 places, 1009 transitions, 19163 flow [2024-06-27 21:18:42,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:42,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:42,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:18:42,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-27 21:18:42,308 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:18:42,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:42,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1474722334, now seen corresponding path program 17 times [2024-06-27 21:18:42,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:42,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000609207] [2024-06-27 21:18:42,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:42,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:42,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:43,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:43,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:43,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000609207] [2024-06-27 21:18:43,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000609207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:43,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:43,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:18:43,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503170804] [2024-06-27 21:18:43,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:43,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:18:43,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:43,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:18:43,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:18:43,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:18:43,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 600 places, 1009 transitions, 19163 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:43,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:43,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:18:43,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:46,637 INFO L124 PetriNetUnfolderBase]: 4939/7489 cut-off events. [2024-06-27 21:18:46,638 INFO L125 PetriNetUnfolderBase]: For 1370496/1370498 co-relation queries the response was YES. [2024-06-27 21:18:46,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86570 conditions, 7489 events. 4939/7489 cut-off events. For 1370496/1370498 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 44279 event pairs, 660 based on Foata normal form. 6/7494 useless extension candidates. Maximal degree in co-relation 86301. Up to 6765 conditions per place. [2024-06-27 21:18:46,934 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 832 selfloop transitions, 203 changer transitions 0/1039 dead transitions. [2024-06-27 21:18:46,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 611 places, 1039 transitions, 21602 flow [2024-06-27 21:18:46,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:18:46,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:18:46,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 204 transitions. [2024-06-27 21:18:46,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 21:18:46,935 INFO L175 Difference]: Start difference. First operand has 600 places, 1009 transitions, 19163 flow. Second operand 12 states and 204 transitions. [2024-06-27 21:18:46,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 611 places, 1039 transitions, 21602 flow [2024-06-27 21:18:57,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 609 places, 1039 transitions, 21337 flow, removed 121 selfloop flow, removed 2 redundant places. [2024-06-27 21:18:57,441 INFO L231 Difference]: Finished difference. Result has 610 places, 1015 transitions, 19567 flow [2024-06-27 21:18:57,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=18946, PETRI_DIFFERENCE_MINUEND_PLACES=598, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1009, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=806, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=19567, PETRI_PLACES=610, PETRI_TRANSITIONS=1015} [2024-06-27 21:18:57,442 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 569 predicate places. [2024-06-27 21:18:57,443 INFO L495 AbstractCegarLoop]: Abstraction has has 610 places, 1015 transitions, 19567 flow [2024-06-27 21:18:57,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:57,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:57,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:18:57,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-27 21:18:57,443 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:18:57,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:57,444 INFO L85 PathProgramCache]: Analyzing trace with hash -235661986, now seen corresponding path program 9 times [2024-06-27 21:18:57,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:57,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945000968] [2024-06-27 21:18:57,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:57,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:57,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:58,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:58,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:58,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945000968] [2024-06-27 21:18:58,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945000968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:58,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:58,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:18:58,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906049232] [2024-06-27 21:18:58,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:58,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:18:58,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:58,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:18:58,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:18:58,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:18:58,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 610 places, 1015 transitions, 19567 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:58,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:58,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:18:58,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:01,723 INFO L124 PetriNetUnfolderBase]: 4911/7452 cut-off events. [2024-06-27 21:19:01,724 INFO L125 PetriNetUnfolderBase]: For 1348902/1348902 co-relation queries the response was YES. [2024-06-27 21:19:01,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84747 conditions, 7452 events. 4911/7452 cut-off events. For 1348902/1348902 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 44095 event pairs, 778 based on Foata normal form. 12/7463 useless extension candidates. Maximal degree in co-relation 84476. Up to 7035 conditions per place. [2024-06-27 21:19:01,899 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 950 selfloop transitions, 82 changer transitions 0/1036 dead transitions. [2024-06-27 21:19:01,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 618 places, 1036 transitions, 21831 flow [2024-06-27 21:19:01,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:19:01,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:19:01,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 21:19:01,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-27 21:19:01,901 INFO L175 Difference]: Start difference. First operand has 610 places, 1015 transitions, 19567 flow. Second operand 9 states and 155 transitions. [2024-06-27 21:19:01,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 618 places, 1036 transitions, 21831 flow [2024-06-27 21:19:12,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 608 places, 1036 transitions, 21267 flow, removed 83 selfloop flow, removed 10 redundant places. [2024-06-27 21:19:12,062 INFO L231 Difference]: Finished difference. Result has 609 places, 1015 transitions, 19173 flow [2024-06-27 21:19:12,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=19003, PETRI_DIFFERENCE_MINUEND_PLACES=600, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1015, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=933, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=19173, PETRI_PLACES=609, PETRI_TRANSITIONS=1015} [2024-06-27 21:19:12,063 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 568 predicate places. [2024-06-27 21:19:12,063 INFO L495 AbstractCegarLoop]: Abstraction has has 609 places, 1015 transitions, 19173 flow [2024-06-27 21:19:12,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:12,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:12,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:19:12,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-27 21:19:12,064 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:12,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:12,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1482073984, now seen corresponding path program 18 times [2024-06-27 21:19:12,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:12,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53582233] [2024-06-27 21:19:12,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:12,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:12,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:13,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:19:13,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:13,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53582233] [2024-06-27 21:19:13,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53582233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:13,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:13,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:19:13,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473056753] [2024-06-27 21:19:13,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:13,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:19:13,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:13,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:19:13,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:19:13,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:19:13,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 609 places, 1015 transitions, 19173 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:13,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:13,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:19:13,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:16,343 INFO L124 PetriNetUnfolderBase]: 4915/7465 cut-off events. [2024-06-27 21:19:16,343 INFO L125 PetriNetUnfolderBase]: For 1276266/1276268 co-relation queries the response was YES. [2024-06-27 21:19:16,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84024 conditions, 7465 events. 4915/7465 cut-off events. For 1276266/1276268 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 44278 event pairs, 642 based on Foata normal form. 6/7470 useless extension candidates. Maximal degree in co-relation 83752. Up to 6731 conditions per place. [2024-06-27 21:19:16,500 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 837 selfloop transitions, 205 changer transitions 0/1046 dead transitions. [2024-06-27 21:19:16,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 621 places, 1046 transitions, 21544 flow [2024-06-27 21:19:16,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 21:19:16,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 21:19:16,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 218 transitions. [2024-06-27 21:19:16,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41923076923076924 [2024-06-27 21:19:16,502 INFO L175 Difference]: Start difference. First operand has 609 places, 1015 transitions, 19173 flow. Second operand 13 states and 218 transitions. [2024-06-27 21:19:16,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 621 places, 1046 transitions, 21544 flow [2024-06-27 21:19:27,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 613 places, 1046 transitions, 21357 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 21:19:27,517 INFO L231 Difference]: Finished difference. Result has 614 places, 1018 transitions, 19523 flow [2024-06-27 21:19:27,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=18986, PETRI_DIFFERENCE_MINUEND_PLACES=601, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1015, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=810, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=19523, PETRI_PLACES=614, PETRI_TRANSITIONS=1018} [2024-06-27 21:19:27,518 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 573 predicate places. [2024-06-27 21:19:27,518 INFO L495 AbstractCegarLoop]: Abstraction has has 614 places, 1018 transitions, 19523 flow [2024-06-27 21:19:27,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:27,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:27,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:19:27,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-27 21:19:27,518 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:27,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:27,519 INFO L85 PathProgramCache]: Analyzing trace with hash -235668930, now seen corresponding path program 19 times [2024-06-27 21:19:27,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:27,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936311326] [2024-06-27 21:19:27,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:27,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:27,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:28,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:19:28,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:28,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936311326] [2024-06-27 21:19:28,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936311326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:28,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:28,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:19:28,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831418894] [2024-06-27 21:19:28,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:28,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:19:28,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:28,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:19:28,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:19:28,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:19:28,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 614 places, 1018 transitions, 19523 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:28,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:28,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:19:28,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:31,921 INFO L124 PetriNetUnfolderBase]: 4903/7445 cut-off events. [2024-06-27 21:19:31,921 INFO L125 PetriNetUnfolderBase]: For 1259212/1259214 co-relation queries the response was YES. [2024-06-27 21:19:32,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83663 conditions, 7445 events. 4903/7445 cut-off events. For 1259212/1259214 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 44151 event pairs, 775 based on Foata normal form. 6/7450 useless extension candidates. Maximal degree in co-relation 83390. Up to 7024 conditions per place. [2024-06-27 21:19:32,204 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 923 selfloop transitions, 113 changer transitions 0/1040 dead transitions. [2024-06-27 21:19:32,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 625 places, 1040 transitions, 21705 flow [2024-06-27 21:19:32,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:19:32,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:19:32,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 197 transitions. [2024-06-27 21:19:32,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41041666666666665 [2024-06-27 21:19:32,205 INFO L175 Difference]: Start difference. First operand has 614 places, 1018 transitions, 19523 flow. Second operand 12 states and 197 transitions. [2024-06-27 21:19:32,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 625 places, 1040 transitions, 21705 flow Killed by 15