./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe011_power.oepc_pso.oepc_rmo.oepc_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/safe011_power.oepc_pso.oepc_rmo.oepc_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/safe011_power.oepc_pso.oepc_rmo.oepc_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe011_power.oepc_pso.oepc_rmo.oepc_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 21:03:28,205 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:03:28,299 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:03:28,303 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:03:28,304 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:03:28,328 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:03:28,328 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:03:28,329 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:03:28,329 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:03:28,332 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:03:28,333 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:03:28,333 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:03:28,334 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:03:28,335 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:03:28,335 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:03:28,335 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:03:28,335 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:03:28,335 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:03:28,336 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:03:28,336 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:03:28,337 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:03:28,337 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:03:28,338 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:03:28,338 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:03:28,338 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:03:28,338 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:03:28,338 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:03:28,339 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:03:28,339 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:03:28,339 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:03:28,340 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:03:28,340 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:03:28,340 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:03:28,341 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:03:28,341 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:03:28,341 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:03:28,341 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:03:28,341 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:03:28,341 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:03:28,342 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:03:28,342 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:03:28,342 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:03:28,342 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:03:28,342 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 21:03:28,550 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:03:28,570 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:03:28,572 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:03:28,573 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:03:28,574 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:03:28,575 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe011_power.oepc_pso.oepc_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-27 21:03:28,718 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:03:28,718 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:03:28,719 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe011_power.oepc_pso.oepc_rmo.oepc_rmo.opt.i [2024-06-27 21:03:29,679 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:03:29,933 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:03:29,933 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe011_power.oepc_pso.oepc_rmo.oepc_rmo.opt.i [2024-06-27 21:03:29,950 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55abb6b01/1c41d7b06e234ef0bec03c8204fa455c/FLAG69d946c06 [2024-06-27 21:03:29,963 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55abb6b01/1c41d7b06e234ef0bec03c8204fa455c [2024-06-27 21:03:29,964 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:03:29,965 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:03:29,967 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:03:29,967 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:03:29,971 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:03:29,972 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:03:28" (1/2) ... [2024-06-27 21:03:29,972 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@311c68cf and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:03:29, skipping insertion in model container [2024-06-27 21:03:29,973 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:03:28" (1/2) ... [2024-06-27 21:03:29,974 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@28dc1286 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:03:29, skipping insertion in model container [2024-06-27 21:03:29,974 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:03:29" (2/2) ... [2024-06-27 21:03:29,974 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@311c68cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:03:29, skipping insertion in model container [2024-06-27 21:03:29,974 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:03:29" (2/2) ... [2024-06-27 21:03:29,975 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:03:30,041 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:03:30,042 INFO L97 edCorrectnessWitness]: Location invariant before [L824-L824] ((((((((((((((((! multithreaded || z$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 2))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 2))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1)) [2024-06-27 21:03:30,042 INFO L97 edCorrectnessWitness]: Location invariant before [L821-L821] ((((((((((((((((! multithreaded || z$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 2))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 2))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1)) [2024-06-27 21:03:30,042 INFO L97 edCorrectnessWitness]: Location invariant before [L823-L823] ((((((((((((((((! multithreaded || z$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 2))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 2))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1)) [2024-06-27 21:03:30,042 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:03:30,042 INFO L106 edCorrectnessWitness]: ghost_update [L819-L819] multithreaded = 1; [2024-06-27 21:03:30,105 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:03:30,403 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:03:30,412 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 21:03:30,524 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:03:30,560 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:03:30,561 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:03:30 WrapperNode [2024-06-27 21:03:30,561 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:03:30,562 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:03:30,562 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:03:30,562 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:03:30,568 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:03:30" (1/1) ... [2024-06-27 21:03:30,595 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:03:30" (1/1) ... [2024-06-27 21:03:30,623 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 143 [2024-06-27 21:03:30,623 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:03:30,624 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:03:30,624 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:03:30,624 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:03:30,633 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:03:30" (1/1) ... [2024-06-27 21:03:30,633 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:03:30" (1/1) ... [2024-06-27 21:03:30,635 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:03:30" (1/1) ... [2024-06-27 21:03:30,650 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 21:03:30,650 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:03:30" (1/1) ... [2024-06-27 21:03:30,650 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:03:30" (1/1) ... [2024-06-27 21:03:30,656 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:03:30" (1/1) ... [2024-06-27 21:03:30,658 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:03:30" (1/1) ... [2024-06-27 21:03:30,661 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:03:30" (1/1) ... [2024-06-27 21:03:30,662 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:03:30" (1/1) ... [2024-06-27 21:03:30,671 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:03:30,672 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:03:30,672 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:03:30,672 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:03:30,673 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:03:30" (1/1) ... [2024-06-27 21:03:30,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:03:30,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:03:30,739 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 21:03:30,764 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 21:03:30,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 21:03:30,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:03:30,779 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 21:03:30,780 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 21:03:30,780 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 21:03:30,780 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 21:03:30,780 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 21:03:30,780 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 21:03:30,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:03:30,780 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 21:03:30,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:03:30,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:03:30,782 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 21:03:30,911 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:03:30,913 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:03:31,151 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:03:31,151 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:03:31,264 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:03:31,264 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 21:03:31,264 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:03:31 BoogieIcfgContainer [2024-06-27 21:03:31,264 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:03:31,281 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:03:31,281 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:03:31,284 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:03:31,284 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:03:28" (1/4) ... [2024-06-27 21:03:31,284 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ee48ddb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:03:31, skipping insertion in model container [2024-06-27 21:03:31,285 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:03:29" (2/4) ... [2024-06-27 21:03:31,285 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ee48ddb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:03:31, skipping insertion in model container [2024-06-27 21:03:31,285 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:03:30" (3/4) ... [2024-06-27 21:03:31,285 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ee48ddb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:03:31, skipping insertion in model container [2024-06-27 21:03:31,285 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:03:31" (4/4) ... [2024-06-27 21:03:31,286 INFO L112 eAbstractionObserver]: Analyzing ICFG safe011_power.oepc_pso.oepc_rmo.oepc_rmo.opt.i [2024-06-27 21:03:31,299 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:03:31,300 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 21:03:31,300 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:03:31,356 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 21:03:31,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-27 21:03:31,413 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-27 21:03:31,413 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:03:31,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 21:03:31,416 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-27 21:03:31,419 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-27 21:03:31,428 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:03:31,433 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;@7762bfb8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:03:31,433 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 21:03:31,439 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:03:31,440 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 21:03:31,440 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:03:31,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:31,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 21:03:31,441 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 21:03:31,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:31,445 INFO L85 PathProgramCache]: Analyzing trace with hash 368653745, now seen corresponding path program 1 times [2024-06-27 21:03:31,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:31,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34083004] [2024-06-27 21:03:31,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:31,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:31,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:32,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:32,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:32,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34083004] [2024-06-27 21:03:32,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34083004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:32,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:32,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:03:32,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161911021] [2024-06-27 21:03:32,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:32,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:03:32,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:32,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:03:32,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:03:32,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 21:03:32,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:32,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:32,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 21:03:32,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:32,664 INFO L124 PetriNetUnfolderBase]: 1407/2118 cut-off events. [2024-06-27 21:03:32,665 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-27 21:03:32,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4322 conditions, 2118 events. 1407/2118 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9703 event pairs, 989 based on Foata normal form. 1/2076 useless extension candidates. Maximal degree in co-relation 4310. Up to 2105 conditions per place. [2024-06-27 21:03:32,682 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 32 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-27 21:03:32,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 169 flow [2024-06-27 21:03:32,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:03:32,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:03:32,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2024-06-27 21:03:32,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-27 21:03:32,695 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 69 transitions. [2024-06-27 21:03:32,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 169 flow [2024-06-27 21:03:32,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 164 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 21:03:32,699 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-27 21:03:32,700 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 21:03:32,703 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-27 21:03:32,703 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-27 21:03:32,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:32,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:32,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:32,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:03:32,705 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 21:03:32,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:32,706 INFO L85 PathProgramCache]: Analyzing trace with hash 2089182464, now seen corresponding path program 1 times [2024-06-27 21:03:32,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:32,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564517789] [2024-06-27 21:03:32,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:32,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:32,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:33,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:33,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:33,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564517789] [2024-06-27 21:03:33,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564517789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:33,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:33,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 21:03:33,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529160300] [2024-06-27 21:03:33,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:33,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:03:33,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:33,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:03:33,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:03:33,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 21:03:33,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:33,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:33,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 21:03:33,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:33,465 INFO L124 PetriNetUnfolderBase]: 1401/2109 cut-off events. [2024-06-27 21:03:33,465 INFO L125 PetriNetUnfolderBase]: For 403/411 co-relation queries the response was YES. [2024-06-27 21:03:33,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4866 conditions, 2109 events. 1401/2109 cut-off events. For 403/411 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9616 event pairs, 864 based on Foata normal form. 6/2113 useless extension candidates. Maximal degree in co-relation 4854. Up to 2081 conditions per place. [2024-06-27 21:03:33,476 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 39 selfloop transitions, 7 changer transitions 0/51 dead transitions. [2024-06-27 21:03:33,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 236 flow [2024-06-27 21:03:33,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:03:33,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:03:33,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2024-06-27 21:03:33,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55625 [2024-06-27 21:03:33,479 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 89 transitions. [2024-06-27 21:03:33,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 236 flow [2024-06-27 21:03:33,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 51 transitions, 232 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:03:33,482 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 134 flow [2024-06-27 21:03:33,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-27 21:03:33,483 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2024-06-27 21:03:33,483 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 134 flow [2024-06-27 21:03:33,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:33,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:33,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:33,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 21:03:33,486 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:03:33,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:33,488 INFO L85 PathProgramCache]: Analyzing trace with hash 340147666, now seen corresponding path program 1 times [2024-06-27 21:03:33,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:33,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944809310] [2024-06-27 21:03:33,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:33,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:33,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:33,949 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 21:03:33,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:33,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944809310] [2024-06-27 21:03:33,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944809310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:33,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:33,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 21:03:33,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36939812] [2024-06-27 21:03:33,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:33,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 21:03:33,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:33,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 21:03:33,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 21:03:33,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 21:03:33,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:33,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:33,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 21:03:33,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:34,216 INFO L124 PetriNetUnfolderBase]: 1409/2123 cut-off events. [2024-06-27 21:03:34,216 INFO L125 PetriNetUnfolderBase]: For 1119/1137 co-relation queries the response was YES. [2024-06-27 21:03:34,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5445 conditions, 2123 events. 1409/2123 cut-off events. For 1119/1137 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9651 event pairs, 673 based on Foata normal form. 9/2126 useless extension candidates. Maximal degree in co-relation 5431. Up to 2027 conditions per place. [2024-06-27 21:03:34,225 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 52 selfloop transitions, 16 changer transitions 0/73 dead transitions. [2024-06-27 21:03:34,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 73 transitions, 390 flow [2024-06-27 21:03:34,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:03:34,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:03:34,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-06-27 21:03:34,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.585 [2024-06-27 21:03:34,227 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 134 flow. Second operand 5 states and 117 transitions. [2024-06-27 21:03:34,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 73 transitions, 390 flow [2024-06-27 21:03:34,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 73 transitions, 376 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 21:03:34,229 INFO L231 Difference]: Finished difference. Result has 49 places, 48 transitions, 233 flow [2024-06-27 21:03:34,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=233, PETRI_PLACES=49, PETRI_TRANSITIONS=48} [2024-06-27 21:03:34,230 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2024-06-27 21:03:34,230 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 48 transitions, 233 flow [2024-06-27 21:03:34,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:34,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:34,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:34,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 21:03:34,231 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:03:34,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:34,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1732998767, now seen corresponding path program 1 times [2024-06-27 21:03:34,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:34,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280829463] [2024-06-27 21:03:34,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:34,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:34,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:34,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:34,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:34,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280829463] [2024-06-27 21:03:34,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280829463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:34,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:34,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:03:34,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958918605] [2024-06-27 21:03:34,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:34,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:03:34,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:34,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:03:34,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:03:34,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 21:03:34,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 48 transitions, 233 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:34,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:34,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 21:03:34,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:35,103 INFO L124 PetriNetUnfolderBase]: 1461/2197 cut-off events. [2024-06-27 21:03:35,103 INFO L125 PetriNetUnfolderBase]: For 2704/2743 co-relation queries the response was YES. [2024-06-27 21:03:35,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6604 conditions, 2197 events. 1461/2197 cut-off events. For 2704/2743 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 9945 event pairs, 550 based on Foata normal form. 17/2208 useless extension candidates. Maximal degree in co-relation 6587. Up to 1944 conditions per place. [2024-06-27 21:03:35,114 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 71 selfloop transitions, 27 changer transitions 0/103 dead transitions. [2024-06-27 21:03:35,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 103 transitions, 635 flow [2024-06-27 21:03:35,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:03:35,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:03:35,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-27 21:03:35,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-27 21:03:35,116 INFO L175 Difference]: Start difference. First operand has 49 places, 48 transitions, 233 flow. Second operand 6 states and 147 transitions. [2024-06-27 21:03:35,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 103 transitions, 635 flow [2024-06-27 21:03:35,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 103 transitions, 627 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-27 21:03:35,120 INFO L231 Difference]: Finished difference. Result has 58 places, 64 transitions, 410 flow [2024-06-27 21:03:35,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=410, PETRI_PLACES=58, PETRI_TRANSITIONS=64} [2024-06-27 21:03:35,121 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 17 predicate places. [2024-06-27 21:03:35,121 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 64 transitions, 410 flow [2024-06-27 21:03:35,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:35,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:35,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:35,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 21:03:35,122 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:03:35,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:35,122 INFO L85 PathProgramCache]: Analyzing trace with hash -2111612287, now seen corresponding path program 1 times [2024-06-27 21:03:35,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:35,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478610577] [2024-06-27 21:03:35,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:35,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:35,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:35,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:35,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:35,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478610577] [2024-06-27 21:03:35,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478610577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:35,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:35,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:03:35,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595638979] [2024-06-27 21:03:35,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:35,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:03:35,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:35,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:03:35,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:03:35,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 21:03:35,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 64 transitions, 410 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:35,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:35,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 21:03:35,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:36,236 INFO L124 PetriNetUnfolderBase]: 1571/2375 cut-off events. [2024-06-27 21:03:36,237 INFO L125 PetriNetUnfolderBase]: For 6090/6135 co-relation queries the response was YES. [2024-06-27 21:03:36,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8659 conditions, 2375 events. 1571/2375 cut-off events. For 6090/6135 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 11019 event pairs, 422 based on Foata normal form. 38/2407 useless extension candidates. Maximal degree in co-relation 8636. Up to 1954 conditions per place. [2024-06-27 21:03:36,251 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 79 selfloop transitions, 30 changer transitions 0/114 dead transitions. [2024-06-27 21:03:36,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 114 transitions, 824 flow [2024-06-27 21:03:36,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:03:36,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:03:36,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-27 21:03:36,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 21:03:36,253 INFO L175 Difference]: Start difference. First operand has 58 places, 64 transitions, 410 flow. Second operand 7 states and 168 transitions. [2024-06-27 21:03:36,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 114 transitions, 824 flow [2024-06-27 21:03:36,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 114 transitions, 806 flow, removed 9 selfloop flow, removed 0 redundant places. [2024-06-27 21:03:36,259 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 485 flow [2024-06-27 21:03:36,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=485, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2024-06-27 21:03:36,260 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 23 predicate places. [2024-06-27 21:03:36,260 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 485 flow [2024-06-27 21:03:36,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:36,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:36,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:36,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 21:03:36,261 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 21:03:36,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:36,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1942437771, now seen corresponding path program 1 times [2024-06-27 21:03:36,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:36,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951991288] [2024-06-27 21:03:36,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:36,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:36,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:36,593 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 21:03:36,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:36,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951991288] [2024-06-27 21:03:36,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951991288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:36,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:36,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:03:36,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156249427] [2024-06-27 21:03:36,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:36,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:03:36,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:36,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:03:36,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:03:36,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:03:36,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 485 flow. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:36,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:36,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:03:36,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:36,983 INFO L124 PetriNetUnfolderBase]: 1566/2366 cut-off events. [2024-06-27 21:03:36,984 INFO L125 PetriNetUnfolderBase]: For 7295/7313 co-relation queries the response was YES. [2024-06-27 21:03:36,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9230 conditions, 2366 events. 1566/2366 cut-off events. For 7295/7313 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10964 event pairs, 574 based on Foata normal form. 11/2375 useless extension candidates. Maximal degree in co-relation 9203. Up to 2344 conditions per place. [2024-06-27 21:03:36,999 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 65 selfloop transitions, 8 changer transitions 0/77 dead transitions. [2024-06-27 21:03:36,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 77 transitions, 659 flow [2024-06-27 21:03:37,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:03:37,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:03:37,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-06-27 21:03:37,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 21:03:37,001 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 485 flow. Second operand 5 states and 85 transitions. [2024-06-27 21:03:37,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 77 transitions, 659 flow [2024-06-27 21:03:37,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 77 transitions, 586 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 21:03:37,007 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 436 flow [2024-06-27 21:03:37,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=436, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2024-06-27 21:03:37,008 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 23 predicate places. [2024-06-27 21:03:37,008 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 436 flow [2024-06-27 21:03:37,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:37,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:37,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:37,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 21:03:37,009 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 21:03:37,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:37,009 INFO L85 PathProgramCache]: Analyzing trace with hash 47254065, now seen corresponding path program 1 times [2024-06-27 21:03:37,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:37,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665930942] [2024-06-27 21:03:37,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:37,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:37,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:37,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:37,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:37,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665930942] [2024-06-27 21:03:37,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665930942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:37,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:37,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:03:37,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941322369] [2024-06-27 21:03:37,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:37,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:03:37,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:37,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:03:37,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:03:37,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:03:37,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 436 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:37,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:37,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:03:37,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:37,959 INFO L124 PetriNetUnfolderBase]: 1813/2721 cut-off events. [2024-06-27 21:03:37,959 INFO L125 PetriNetUnfolderBase]: For 8294/8294 co-relation queries the response was YES. [2024-06-27 21:03:37,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10101 conditions, 2721 events. 1813/2721 cut-off events. For 8294/8294 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12755 event pairs, 681 based on Foata normal form. 4/2723 useless extension candidates. Maximal degree in co-relation 10072. Up to 2682 conditions per place. [2024-06-27 21:03:37,981 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 77 selfloop transitions, 11 changer transitions 0/91 dead transitions. [2024-06-27 21:03:37,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 91 transitions, 715 flow [2024-06-27 21:03:37,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:03:37,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:03:37,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-27 21:03:37,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 21:03:37,982 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 436 flow. Second operand 6 states and 96 transitions. [2024-06-27 21:03:37,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 91 transitions, 715 flow [2024-06-27 21:03:37,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 91 transitions, 683 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 21:03:37,989 INFO L231 Difference]: Finished difference. Result has 68 places, 75 transitions, 519 flow [2024-06-27 21:03:37,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=519, PETRI_PLACES=68, PETRI_TRANSITIONS=75} [2024-06-27 21:03:37,990 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 27 predicate places. [2024-06-27 21:03:37,991 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 75 transitions, 519 flow [2024-06-27 21:03:37,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:37,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:37,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:37,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 21:03:37,991 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 21:03:37,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:37,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1459155848, now seen corresponding path program 1 times [2024-06-27 21:03:37,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:37,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941677905] [2024-06-27 21:03:37,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:37,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:38,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:38,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:38,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:38,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941677905] [2024-06-27 21:03:38,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941677905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:38,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:38,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:03:38,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963346272] [2024-06-27 21:03:38,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:38,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:03:38,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:38,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:03:38,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:03:38,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:03:38,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 75 transitions, 519 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:38,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:38,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:03:38,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:38,778 INFO L124 PetriNetUnfolderBase]: 1720/2594 cut-off events. [2024-06-27 21:03:38,778 INFO L125 PetriNetUnfolderBase]: For 10154/10220 co-relation queries the response was YES. [2024-06-27 21:03:38,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10446 conditions, 2594 events. 1720/2594 cut-off events. For 10154/10220 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12176 event pairs, 617 based on Foata normal form. 26/2604 useless extension candidates. Maximal degree in co-relation 10415. Up to 2480 conditions per place. [2024-06-27 21:03:38,794 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 69 selfloop transitions, 22 changer transitions 0/98 dead transitions. [2024-06-27 21:03:38,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 98 transitions, 808 flow [2024-06-27 21:03:38,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:03:38,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:03:38,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-27 21:03:38,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45416666666666666 [2024-06-27 21:03:38,796 INFO L175 Difference]: Start difference. First operand has 68 places, 75 transitions, 519 flow. Second operand 6 states and 109 transitions. [2024-06-27 21:03:38,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 98 transitions, 808 flow [2024-06-27 21:03:38,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 98 transitions, 802 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-27 21:03:38,808 INFO L231 Difference]: Finished difference. Result has 73 places, 78 transitions, 598 flow [2024-06-27 21:03:38,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=513, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=598, PETRI_PLACES=73, PETRI_TRANSITIONS=78} [2024-06-27 21:03:38,810 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 32 predicate places. [2024-06-27 21:03:38,810 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 78 transitions, 598 flow [2024-06-27 21:03:38,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:38,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:38,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:38,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 21:03:38,811 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:03:38,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:38,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1628030678, now seen corresponding path program 2 times [2024-06-27 21:03:38,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:38,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031913410] [2024-06-27 21:03:38,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:38,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:38,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:39,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:39,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:39,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031913410] [2024-06-27 21:03:39,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031913410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:39,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:39,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:03:39,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463102584] [2024-06-27 21:03:39,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:39,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:03:39,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:39,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:03:39,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:03:39,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:03:39,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 78 transitions, 598 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:39,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:39,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:03:39,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:39,649 INFO L124 PetriNetUnfolderBase]: 1703/2566 cut-off events. [2024-06-27 21:03:39,649 INFO L125 PetriNetUnfolderBase]: For 11694/11766 co-relation queries the response was YES. [2024-06-27 21:03:39,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10622 conditions, 2566 events. 1703/2566 cut-off events. For 11694/11766 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 11986 event pairs, 613 based on Foata normal form. 6/2560 useless extension candidates. Maximal degree in co-relation 10588. Up to 2521 conditions per place. [2024-06-27 21:03:39,661 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 71 selfloop transitions, 15 changer transitions 0/93 dead transitions. [2024-06-27 21:03:39,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 93 transitions, 808 flow [2024-06-27 21:03:39,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:03:39,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:03:39,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-27 21:03:39,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 21:03:39,663 INFO L175 Difference]: Start difference. First operand has 73 places, 78 transitions, 598 flow. Second operand 6 states and 100 transitions. [2024-06-27 21:03:39,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 93 transitions, 808 flow [2024-06-27 21:03:39,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 93 transitions, 775 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 21:03:39,675 INFO L231 Difference]: Finished difference. Result has 76 places, 78 transitions, 604 flow [2024-06-27 21:03:39,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=565, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=604, PETRI_PLACES=76, PETRI_TRANSITIONS=78} [2024-06-27 21:03:39,676 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 35 predicate places. [2024-06-27 21:03:39,677 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 78 transitions, 604 flow [2024-06-27 21:03:39,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:39,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:39,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:39,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 21:03:39,677 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 21:03:39,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:39,678 INFO L85 PathProgramCache]: Analyzing trace with hash -2112038878, now seen corresponding path program 1 times [2024-06-27 21:03:39,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:39,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183326132] [2024-06-27 21:03:39,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:39,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:39,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:40,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:40,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:40,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183326132] [2024-06-27 21:03:40,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183326132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:40,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:40,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:03:40,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581594094] [2024-06-27 21:03:40,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:40,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:03:40,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:40,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:03:40,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:03:40,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:03:40,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 78 transitions, 604 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:40,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:40,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:03:40,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:40,614 INFO L124 PetriNetUnfolderBase]: 1872/2804 cut-off events. [2024-06-27 21:03:40,614 INFO L125 PetriNetUnfolderBase]: For 14072/14075 co-relation queries the response was YES. [2024-06-27 21:03:40,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11494 conditions, 2804 events. 1872/2804 cut-off events. For 14072/14075 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13046 event pairs, 592 based on Foata normal form. 8/2809 useless extension candidates. Maximal degree in co-relation 11459. Up to 2589 conditions per place. [2024-06-27 21:03:40,632 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 100 selfloop transitions, 23 changer transitions 0/126 dead transitions. [2024-06-27 21:03:40,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 126 transitions, 1119 flow [2024-06-27 21:03:40,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:03:40,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:03:40,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 21:03:40,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392857142857143 [2024-06-27 21:03:40,634 INFO L175 Difference]: Start difference. First operand has 76 places, 78 transitions, 604 flow. Second operand 7 states and 123 transitions. [2024-06-27 21:03:40,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 126 transitions, 1119 flow [2024-06-27 21:03:40,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 126 transitions, 1042 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 21:03:40,648 INFO L231 Difference]: Finished difference. Result has 80 places, 95 transitions, 757 flow [2024-06-27 21:03:40,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=757, PETRI_PLACES=80, PETRI_TRANSITIONS=95} [2024-06-27 21:03:40,649 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 39 predicate places. [2024-06-27 21:03:40,650 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 95 transitions, 757 flow [2024-06-27 21:03:40,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:40,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:40,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:40,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 21:03:40,651 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 21:03:40,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:40,651 INFO L85 PathProgramCache]: Analyzing trace with hash -905330398, now seen corresponding path program 2 times [2024-06-27 21:03:40,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:40,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026769093] [2024-06-27 21:03:40,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:40,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:40,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:41,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:41,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:41,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026769093] [2024-06-27 21:03:41,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026769093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:41,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:41,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:03:41,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470806285] [2024-06-27 21:03:41,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:41,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:03:41,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:41,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:03:41,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:03:41,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:03:41,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 95 transitions, 757 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:41,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:41,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:03:41,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:41,659 INFO L124 PetriNetUnfolderBase]: 1894/2835 cut-off events. [2024-06-27 21:03:41,660 INFO L125 PetriNetUnfolderBase]: For 16650/16650 co-relation queries the response was YES. [2024-06-27 21:03:41,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12634 conditions, 2835 events. 1894/2835 cut-off events. For 16650/16650 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13077 event pairs, 621 based on Foata normal form. 4/2837 useless extension candidates. Maximal degree in co-relation 12595. Up to 2754 conditions per place. [2024-06-27 21:03:41,677 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 105 selfloop transitions, 18 changer transitions 0/126 dead transitions. [2024-06-27 21:03:41,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 126 transitions, 1167 flow [2024-06-27 21:03:41,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:03:41,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:03:41,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-27 21:03:41,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-27 21:03:41,678 INFO L175 Difference]: Start difference. First operand has 80 places, 95 transitions, 757 flow. Second operand 7 states and 115 transitions. [2024-06-27 21:03:41,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 126 transitions, 1167 flow [2024-06-27 21:03:41,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 126 transitions, 1145 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-06-27 21:03:41,695 INFO L231 Difference]: Finished difference. Result has 87 places, 103 transitions, 860 flow [2024-06-27 21:03:41,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=739, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=860, PETRI_PLACES=87, PETRI_TRANSITIONS=103} [2024-06-27 21:03:41,695 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 46 predicate places. [2024-06-27 21:03:41,695 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 103 transitions, 860 flow [2024-06-27 21:03:41,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:41,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:41,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:41,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 21:03:41,696 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 21:03:41,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:41,697 INFO L85 PathProgramCache]: Analyzing trace with hash -120446748, now seen corresponding path program 3 times [2024-06-27 21:03:41,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:41,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434209475] [2024-06-27 21:03:41,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:41,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:41,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:42,152 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 21:03:42,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:42,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434209475] [2024-06-27 21:03:42,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434209475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:42,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:42,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:03:42,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311638798] [2024-06-27 21:03:42,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:42,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:03:42,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:42,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:03:42,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:03:42,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:03:42,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 103 transitions, 860 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:42,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:42,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:03:42,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:42,709 INFO L124 PetriNetUnfolderBase]: 1884/2821 cut-off events. [2024-06-27 21:03:42,711 INFO L125 PetriNetUnfolderBase]: For 19371/19371 co-relation queries the response was YES. [2024-06-27 21:03:42,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12933 conditions, 2821 events. 1884/2821 cut-off events. For 19371/19371 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13057 event pairs, 619 based on Foata normal form. 4/2823 useless extension candidates. Maximal degree in co-relation 12890. Up to 2773 conditions per place. [2024-06-27 21:03:42,725 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 107 selfloop transitions, 14 changer transitions 0/124 dead transitions. [2024-06-27 21:03:42,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 124 transitions, 1162 flow [2024-06-27 21:03:42,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:03:42,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:03:42,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-27 21:03:42,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-27 21:03:42,727 INFO L175 Difference]: Start difference. First operand has 87 places, 103 transitions, 860 flow. Second operand 7 states and 110 transitions. [2024-06-27 21:03:42,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 124 transitions, 1162 flow [2024-06-27 21:03:42,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 124 transitions, 1134 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 21:03:42,747 INFO L231 Difference]: Finished difference. Result has 91 places, 104 transitions, 878 flow [2024-06-27 21:03:42,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=878, PETRI_PLACES=91, PETRI_TRANSITIONS=104} [2024-06-27 21:03:42,748 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 50 predicate places. [2024-06-27 21:03:42,748 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 104 transitions, 878 flow [2024-06-27 21:03:42,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:42,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:42,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:42,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 21:03:42,748 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 21:03:42,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:42,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1833429712, now seen corresponding path program 1 times [2024-06-27 21:03:42,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:42,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157685859] [2024-06-27 21:03:42,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:42,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:42,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:43,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:43,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:43,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157685859] [2024-06-27 21:03:43,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157685859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:43,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:43,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:03:43,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756273606] [2024-06-27 21:03:43,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:43,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:03:43,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:43,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:03:43,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:03:43,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:03:43,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 104 transitions, 878 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:43,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:43,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:03:43,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:44,164 INFO L124 PetriNetUnfolderBase]: 1876/2809 cut-off events. [2024-06-27 21:03:44,164 INFO L125 PetriNetUnfolderBase]: For 21476/21476 co-relation queries the response was YES. [2024-06-27 21:03:44,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13088 conditions, 2809 events. 1876/2809 cut-off events. For 21476/21476 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13002 event pairs, 600 based on Foata normal form. 4/2811 useless extension candidates. Maximal degree in co-relation 13044. Up to 2752 conditions per place. [2024-06-27 21:03:44,187 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 108 selfloop transitions, 15 changer transitions 0/126 dead transitions. [2024-06-27 21:03:44,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 126 transitions, 1188 flow [2024-06-27 21:03:44,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:03:44,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:03:44,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-27 21:03:44,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-27 21:03:44,189 INFO L175 Difference]: Start difference. First operand has 91 places, 104 transitions, 878 flow. Second operand 7 states and 110 transitions. [2024-06-27 21:03:44,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 126 transitions, 1188 flow [2024-06-27 21:03:44,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 126 transitions, 1160 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 21:03:44,209 INFO L231 Difference]: Finished difference. Result has 93 places, 106 transitions, 905 flow [2024-06-27 21:03:44,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=850, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=905, PETRI_PLACES=93, PETRI_TRANSITIONS=106} [2024-06-27 21:03:44,210 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 52 predicate places. [2024-06-27 21:03:44,211 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 106 transitions, 905 flow [2024-06-27 21:03:44,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:44,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:44,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:44,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 21:03:44,211 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 21:03:44,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:44,212 INFO L85 PathProgramCache]: Analyzing trace with hash 2085669287, now seen corresponding path program 1 times [2024-06-27 21:03:44,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:44,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427982728] [2024-06-27 21:03:44,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:44,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:44,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:44,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:44,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:44,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427982728] [2024-06-27 21:03:44,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427982728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:44,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:44,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:03:44,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265455817] [2024-06-27 21:03:44,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:44,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:03:44,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:44,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:03:44,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:03:44,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:03:44,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 106 transitions, 905 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:44,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:44,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:03:44,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:45,285 INFO L124 PetriNetUnfolderBase]: 1845/2779 cut-off events. [2024-06-27 21:03:45,285 INFO L125 PetriNetUnfolderBase]: For 26954/27034 co-relation queries the response was YES. [2024-06-27 21:03:45,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13553 conditions, 2779 events. 1845/2779 cut-off events. For 26954/27034 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 13159 event pairs, 520 based on Foata normal form. 31/2748 useless extension candidates. Maximal degree in co-relation 13508. Up to 2399 conditions per place. [2024-06-27 21:03:45,305 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 95 selfloop transitions, 39 changer transitions 0/149 dead transitions. [2024-06-27 21:03:45,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 149 transitions, 1441 flow [2024-06-27 21:03:45,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:03:45,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:03:45,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 21:03:45,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48928571428571427 [2024-06-27 21:03:45,307 INFO L175 Difference]: Start difference. First operand has 93 places, 106 transitions, 905 flow. Second operand 7 states and 137 transitions. [2024-06-27 21:03:45,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 149 transitions, 1441 flow [2024-06-27 21:03:45,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 149 transitions, 1404 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 21:03:45,329 INFO L231 Difference]: Finished difference. Result has 95 places, 114 transitions, 1019 flow [2024-06-27 21:03:45,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=868, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1019, PETRI_PLACES=95, PETRI_TRANSITIONS=114} [2024-06-27 21:03:45,329 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 54 predicate places. [2024-06-27 21:03:45,330 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 114 transitions, 1019 flow [2024-06-27 21:03:45,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:45,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:45,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:45,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 21:03:45,330 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 21:03:45,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:45,331 INFO L85 PathProgramCache]: Analyzing trace with hash 2085759497, now seen corresponding path program 2 times [2024-06-27 21:03:45,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:45,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073008051] [2024-06-27 21:03:45,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:45,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:45,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:46,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:46,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:46,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073008051] [2024-06-27 21:03:46,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073008051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:46,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:46,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:03:46,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460994342] [2024-06-27 21:03:46,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:46,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:03:46,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:46,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:03:46,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:03:46,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:03:46,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 114 transitions, 1019 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:46,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:46,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:03:46,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:46,488 INFO L124 PetriNetUnfolderBase]: 1837/2768 cut-off events. [2024-06-27 21:03:46,488 INFO L125 PetriNetUnfolderBase]: For 30772/30874 co-relation queries the response was YES. [2024-06-27 21:03:46,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14305 conditions, 2768 events. 1837/2768 cut-off events. For 30772/30874 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 13051 event pairs, 553 based on Foata normal form. 15/2721 useless extension candidates. Maximal degree in co-relation 14259. Up to 2583 conditions per place. [2024-06-27 21:03:46,506 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 91 selfloop transitions, 32 changer transitions 0/138 dead transitions. [2024-06-27 21:03:46,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 138 transitions, 1337 flow [2024-06-27 21:03:46,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:03:46,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:03:46,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 21:03:46,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-27 21:03:46,507 INFO L175 Difference]: Start difference. First operand has 95 places, 114 transitions, 1019 flow. Second operand 7 states and 122 transitions. [2024-06-27 21:03:46,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 138 transitions, 1337 flow [2024-06-27 21:03:46,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 138 transitions, 1279 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 21:03:46,532 INFO L231 Difference]: Finished difference. Result has 99 places, 116 transitions, 1054 flow [2024-06-27 21:03:46,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=963, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1054, PETRI_PLACES=99, PETRI_TRANSITIONS=116} [2024-06-27 21:03:46,532 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 58 predicate places. [2024-06-27 21:03:46,533 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 116 transitions, 1054 flow [2024-06-27 21:03:46,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:46,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:46,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:46,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 21:03:46,533 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 21:03:46,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:46,534 INFO L85 PathProgramCache]: Analyzing trace with hash 2089484302, now seen corresponding path program 1 times [2024-06-27 21:03:46,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:46,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642008535] [2024-06-27 21:03:46,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:46,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:46,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:47,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:47,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:47,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642008535] [2024-06-27 21:03:47,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642008535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:47,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:47,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:03:47,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557207142] [2024-06-27 21:03:47,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:47,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:03:47,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:47,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:03:47,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:03:47,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:03:47,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 116 transitions, 1054 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:47,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:47,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:03:47,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:47,492 INFO L124 PetriNetUnfolderBase]: 1968/2942 cut-off events. [2024-06-27 21:03:47,492 INFO L125 PetriNetUnfolderBase]: For 32109/32112 co-relation queries the response was YES. [2024-06-27 21:03:47,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15133 conditions, 2942 events. 1968/2942 cut-off events. For 32109/32112 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 13719 event pairs, 584 based on Foata normal form. 4/2943 useless extension candidates. Maximal degree in co-relation 15085. Up to 2682 conditions per place. [2024-06-27 21:03:47,511 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 116 selfloop transitions, 34 changer transitions 0/153 dead transitions. [2024-06-27 21:03:47,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 153 transitions, 1622 flow [2024-06-27 21:03:47,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:03:47,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:03:47,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 21:03:47,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 21:03:47,513 INFO L175 Difference]: Start difference. First operand has 99 places, 116 transitions, 1054 flow. Second operand 7 states and 125 transitions. [2024-06-27 21:03:47,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 153 transitions, 1622 flow [2024-06-27 21:03:47,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 153 transitions, 1547 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 21:03:47,539 INFO L231 Difference]: Finished difference. Result has 102 places, 123 transitions, 1134 flow [2024-06-27 21:03:47,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=981, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1134, PETRI_PLACES=102, PETRI_TRANSITIONS=123} [2024-06-27 21:03:47,540 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 61 predicate places. [2024-06-27 21:03:47,540 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 123 transitions, 1134 flow [2024-06-27 21:03:47,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:47,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:47,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:47,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 21:03:47,541 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 21:03:47,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:47,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1048699886, now seen corresponding path program 2 times [2024-06-27 21:03:47,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:47,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151549388] [2024-06-27 21:03:47,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:47,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:47,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:48,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:48,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:48,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151549388] [2024-06-27 21:03:48,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151549388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:48,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:48,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:03:48,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908789086] [2024-06-27 21:03:48,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:48,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:03:48,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:48,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:03:48,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:03:48,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:03:48,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 123 transitions, 1134 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:48,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:48,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:03:48,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:48,483 INFO L124 PetriNetUnfolderBase]: 1958/2928 cut-off events. [2024-06-27 21:03:48,483 INFO L125 PetriNetUnfolderBase]: For 35262/35265 co-relation queries the response was YES. [2024-06-27 21:03:48,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15399 conditions, 2928 events. 1958/2928 cut-off events. For 35262/35265 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 13660 event pairs, 575 based on Foata normal form. 4/2929 useless extension candidates. Maximal degree in co-relation 15349. Up to 2674 conditions per place. [2024-06-27 21:03:48,502 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 114 selfloop transitions, 38 changer transitions 0/155 dead transitions. [2024-06-27 21:03:48,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 155 transitions, 1603 flow [2024-06-27 21:03:48,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:03:48,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:03:48,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 21:03:48,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45357142857142857 [2024-06-27 21:03:48,504 INFO L175 Difference]: Start difference. First operand has 102 places, 123 transitions, 1134 flow. Second operand 7 states and 127 transitions. [2024-06-27 21:03:48,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 155 transitions, 1603 flow [2024-06-27 21:03:48,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 155 transitions, 1551 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 21:03:48,540 INFO L231 Difference]: Finished difference. Result has 107 places, 125 transitions, 1210 flow [2024-06-27 21:03:48,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1083, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1210, PETRI_PLACES=107, PETRI_TRANSITIONS=125} [2024-06-27 21:03:48,540 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 66 predicate places. [2024-06-27 21:03:48,540 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 125 transitions, 1210 flow [2024-06-27 21:03:48,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:48,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:48,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:48,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 21:03:48,541 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 21:03:48,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:48,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1999732016, now seen corresponding path program 3 times [2024-06-27 21:03:48,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:48,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146655943] [2024-06-27 21:03:48,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:48,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:48,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:48,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:48,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:48,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146655943] [2024-06-27 21:03:48,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146655943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:48,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:48,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:03:48,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957907715] [2024-06-27 21:03:48,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:48,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:03:48,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:48,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:03:48,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:03:49,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:03:49,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 125 transitions, 1210 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:49,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:49,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:03:49,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:49,504 INFO L124 PetriNetUnfolderBase]: 1948/2914 cut-off events. [2024-06-27 21:03:49,504 INFO L125 PetriNetUnfolderBase]: For 38539/38542 co-relation queries the response was YES. [2024-06-27 21:03:49,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15620 conditions, 2914 events. 1948/2914 cut-off events. For 38539/38542 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 13563 event pairs, 606 based on Foata normal form. 6/2917 useless extension candidates. Maximal degree in co-relation 15568. Up to 2842 conditions per place. [2024-06-27 21:03:49,542 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 128 selfloop transitions, 16 changer transitions 0/147 dead transitions. [2024-06-27 21:03:49,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 147 transitions, 1565 flow [2024-06-27 21:03:49,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:03:49,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:03:49,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-27 21:03:49,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 21:03:49,544 INFO L175 Difference]: Start difference. First operand has 107 places, 125 transitions, 1210 flow. Second operand 7 states and 112 transitions. [2024-06-27 21:03:49,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 147 transitions, 1565 flow [2024-06-27 21:03:49,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 147 transitions, 1503 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 21:03:49,583 INFO L231 Difference]: Finished difference. Result has 110 places, 126 transitions, 1201 flow [2024-06-27 21:03:49,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1151, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1201, PETRI_PLACES=110, PETRI_TRANSITIONS=126} [2024-06-27 21:03:49,584 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 69 predicate places. [2024-06-27 21:03:49,584 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 126 transitions, 1201 flow [2024-06-27 21:03:49,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:49,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:49,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:49,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 21:03:49,585 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 21:03:49,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:49,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1161714167, now seen corresponding path program 1 times [2024-06-27 21:03:49,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:49,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126648113] [2024-06-27 21:03:49,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:49,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:49,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:50,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:50,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:50,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126648113] [2024-06-27 21:03:50,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126648113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:50,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:50,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:03:50,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247489327] [2024-06-27 21:03:50,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:50,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:03:50,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:50,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:03:50,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:03:50,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:03:50,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 126 transitions, 1201 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:50,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:50,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:03:50,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:50,834 INFO L124 PetriNetUnfolderBase]: 1943/2906 cut-off events. [2024-06-27 21:03:50,834 INFO L125 PetriNetUnfolderBase]: For 41556/41556 co-relation queries the response was YES. [2024-06-27 21:03:50,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15673 conditions, 2906 events. 1943/2906 cut-off events. For 41556/41556 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 13504 event pairs, 600 based on Foata normal form. 2/2906 useless extension candidates. Maximal degree in co-relation 15620. Up to 2840 conditions per place. [2024-06-27 21:03:50,853 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 127 selfloop transitions, 19 changer transitions 0/149 dead transitions. [2024-06-27 21:03:50,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 149 transitions, 1569 flow [2024-06-27 21:03:50,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:03:50,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:03:50,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-27 21:03:50,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3964285714285714 [2024-06-27 21:03:50,855 INFO L175 Difference]: Start difference. First operand has 110 places, 126 transitions, 1201 flow. Second operand 7 states and 111 transitions. [2024-06-27 21:03:50,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 149 transitions, 1569 flow [2024-06-27 21:03:50,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 149 transitions, 1537 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 21:03:50,892 INFO L231 Difference]: Finished difference. Result has 112 places, 129 transitions, 1249 flow [2024-06-27 21:03:50,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1169, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1249, PETRI_PLACES=112, PETRI_TRANSITIONS=129} [2024-06-27 21:03:50,893 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 71 predicate places. [2024-06-27 21:03:50,893 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 129 transitions, 1249 flow [2024-06-27 21:03:50,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:50,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:50,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:50,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 21:03:50,894 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 21:03:50,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:50,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1720011866, now seen corresponding path program 1 times [2024-06-27 21:03:50,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:50,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660705929] [2024-06-27 21:03:50,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:50,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:50,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:51,285 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 21:03:51,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:51,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660705929] [2024-06-27 21:03:51,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660705929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:51,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:51,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:03:51,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117480571] [2024-06-27 21:03:51,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:51,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:03:51,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:51,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:03:51,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:03:51,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:03:51,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 129 transitions, 1249 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:51,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:51,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:03:51,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:51,810 INFO L124 PetriNetUnfolderBase]: 1937/2898 cut-off events. [2024-06-27 21:03:51,811 INFO L125 PetriNetUnfolderBase]: For 45249/45249 co-relation queries the response was YES. [2024-06-27 21:03:51,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16112 conditions, 2898 events. 1937/2898 cut-off events. For 45249/45249 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13478 event pairs, 604 based on Foata normal form. 2/2898 useless extension candidates. Maximal degree in co-relation 16058. Up to 2877 conditions per place. [2024-06-27 21:03:51,830 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 128 selfloop transitions, 10 changer transitions 0/141 dead transitions. [2024-06-27 21:03:51,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 141 transitions, 1577 flow [2024-06-27 21:03:51,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:03:51,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:03:51,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2024-06-27 21:03:51,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.395 [2024-06-27 21:03:51,831 INFO L175 Difference]: Start difference. First operand has 112 places, 129 transitions, 1249 flow. Second operand 5 states and 79 transitions. [2024-06-27 21:03:51,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 141 transitions, 1577 flow [2024-06-27 21:03:51,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 141 transitions, 1535 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 21:03:51,913 INFO L231 Difference]: Finished difference. Result has 112 places, 132 transitions, 1269 flow [2024-06-27 21:03:51,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1207, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1269, PETRI_PLACES=112, PETRI_TRANSITIONS=132} [2024-06-27 21:03:51,914 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 71 predicate places. [2024-06-27 21:03:51,914 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 132 transitions, 1269 flow [2024-06-27 21:03:51,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:51,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:51,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:51,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 21:03:51,914 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:03:51,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:51,915 INFO L85 PathProgramCache]: Analyzing trace with hash 231179541, now seen corresponding path program 1 times [2024-06-27 21:03:51,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:51,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065657450] [2024-06-27 21:03:51,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:51,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:51,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:52,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:52,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:52,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065657450] [2024-06-27 21:03:52,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065657450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:52,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:52,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:03:52,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651591549] [2024-06-27 21:03:52,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:52,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:03:52,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:52,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:03:52,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:03:52,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:03:52,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 132 transitions, 1269 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:52,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:52,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:03:52,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:53,140 INFO L124 PetriNetUnfolderBase]: 1883/2838 cut-off events. [2024-06-27 21:03:53,141 INFO L125 PetriNetUnfolderBase]: For 54614/54706 co-relation queries the response was YES. [2024-06-27 21:03:53,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16380 conditions, 2838 events. 1883/2838 cut-off events. For 54614/54706 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 13465 event pairs, 416 based on Foata normal form. 26/2805 useless extension candidates. Maximal degree in co-relation 16325. Up to 2503 conditions per place. [2024-06-27 21:03:53,160 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 116 selfloop transitions, 40 changer transitions 0/176 dead transitions. [2024-06-27 21:03:53,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 176 transitions, 1835 flow [2024-06-27 21:03:53,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:03:53,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:03:53,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 21:03:53,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446875 [2024-06-27 21:03:53,162 INFO L175 Difference]: Start difference. First operand has 112 places, 132 transitions, 1269 flow. Second operand 8 states and 143 transitions. [2024-06-27 21:03:53,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 176 transitions, 1835 flow [2024-06-27 21:03:53,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 176 transitions, 1803 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 21:03:53,204 INFO L231 Difference]: Finished difference. Result has 119 places, 142 transitions, 1447 flow [2024-06-27 21:03:53,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1237, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1447, PETRI_PLACES=119, PETRI_TRANSITIONS=142} [2024-06-27 21:03:53,205 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 78 predicate places. [2024-06-27 21:03:53,205 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 142 transitions, 1447 flow [2024-06-27 21:03:53,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:53,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:53,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:53,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 21:03:53,206 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:03:53,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:53,206 INFO L85 PathProgramCache]: Analyzing trace with hash 231239991, now seen corresponding path program 2 times [2024-06-27 21:03:53,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:53,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703732142] [2024-06-27 21:03:53,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:53,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:53,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:53,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:53,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703732142] [2024-06-27 21:03:53,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703732142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:53,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:53,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:03:53,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412686416] [2024-06-27 21:03:53,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:53,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:03:53,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:53,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:03:53,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:03:54,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:03:54,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 142 transitions, 1447 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:54,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:54,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:03:54,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:54,555 INFO L124 PetriNetUnfolderBase]: 1873/2822 cut-off events. [2024-06-27 21:03:54,555 INFO L125 PetriNetUnfolderBase]: For 59390/59478 co-relation queries the response was YES. [2024-06-27 21:03:54,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16898 conditions, 2822 events. 1873/2822 cut-off events. For 59390/59478 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 13417 event pairs, 518 based on Foata normal form. 35/2800 useless extension candidates. Maximal degree in co-relation 16840. Up to 2568 conditions per place. [2024-06-27 21:03:54,572 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 115 selfloop transitions, 42 changer transitions 0/177 dead transitions. [2024-06-27 21:03:54,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 177 transitions, 1855 flow [2024-06-27 21:03:54,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:03:54,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:03:54,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 21:03:54,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-27 21:03:54,574 INFO L175 Difference]: Start difference. First operand has 119 places, 142 transitions, 1447 flow. Second operand 9 states and 156 transitions. [2024-06-27 21:03:54,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 177 transitions, 1855 flow [2024-06-27 21:03:54,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 177 transitions, 1784 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-27 21:03:54,620 INFO L231 Difference]: Finished difference. Result has 126 places, 143 transitions, 1484 flow [2024-06-27 21:03:54,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1376, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1484, PETRI_PLACES=126, PETRI_TRANSITIONS=143} [2024-06-27 21:03:54,621 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 85 predicate places. [2024-06-27 21:03:54,621 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 143 transitions, 1484 flow [2024-06-27 21:03:54,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:54,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:54,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:54,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 21:03:54,621 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:03:54,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:54,622 INFO L85 PathProgramCache]: Analyzing trace with hash 231240115, now seen corresponding path program 1 times [2024-06-27 21:03:54,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:54,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310424489] [2024-06-27 21:03:54,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:54,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:54,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:55,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:55,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:55,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310424489] [2024-06-27 21:03:55,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310424489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:55,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:55,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:03:55,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894883140] [2024-06-27 21:03:55,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:55,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:03:55,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:55,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:03:55,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:03:55,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:03:55,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 143 transitions, 1484 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:55,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:55,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:03:55,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:55,923 INFO L124 PetriNetUnfolderBase]: 1987/2974 cut-off events. [2024-06-27 21:03:55,923 INFO L125 PetriNetUnfolderBase]: For 59427/59430 co-relation queries the response was YES. [2024-06-27 21:03:55,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17551 conditions, 2974 events. 1987/2974 cut-off events. For 59427/59430 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13955 event pairs, 510 based on Foata normal form. 4/2975 useless extension candidates. Maximal degree in co-relation 17490. Up to 2597 conditions per place. [2024-06-27 21:03:55,947 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 148 selfloop transitions, 49 changer transitions 0/200 dead transitions. [2024-06-27 21:03:55,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 200 transitions, 2222 flow [2024-06-27 21:03:55,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:03:55,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:03:55,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-27 21:03:55,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43 [2024-06-27 21:03:55,949 INFO L175 Difference]: Start difference. First operand has 126 places, 143 transitions, 1484 flow. Second operand 10 states and 172 transitions. [2024-06-27 21:03:55,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 200 transitions, 2222 flow [2024-06-27 21:03:56,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 200 transitions, 2130 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 21:03:56,013 INFO L231 Difference]: Finished difference. Result has 132 places, 156 transitions, 1667 flow [2024-06-27 21:03:56,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1402, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1667, PETRI_PLACES=132, PETRI_TRANSITIONS=156} [2024-06-27 21:03:56,013 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 91 predicate places. [2024-06-27 21:03:56,014 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 156 transitions, 1667 flow [2024-06-27 21:03:56,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:56,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:56,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:56,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 21:03:56,014 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:03:56,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:56,015 INFO L85 PathProgramCache]: Analyzing trace with hash 349327795, now seen corresponding path program 2 times [2024-06-27 21:03:56,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:56,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268816621] [2024-06-27 21:03:56,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:56,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:56,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:56,768 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 21:03:56,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:56,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268816621] [2024-06-27 21:03:56,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268816621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:56,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:56,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:03:56,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219069520] [2024-06-27 21:03:56,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:56,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:03:56,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:56,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:03:56,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:03:56,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:03:56,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 156 transitions, 1667 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:56,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:56,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:03:56,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:57,401 INFO L124 PetriNetUnfolderBase]: 2009/3006 cut-off events. [2024-06-27 21:03:57,402 INFO L125 PetriNetUnfolderBase]: For 64760/64763 co-relation queries the response was YES. [2024-06-27 21:03:57,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18421 conditions, 3006 events. 2009/3006 cut-off events. For 64760/64763 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 14073 event pairs, 518 based on Foata normal form. 4/3007 useless extension candidates. Maximal degree in co-relation 18357. Up to 2667 conditions per place. [2024-06-27 21:03:57,424 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 152 selfloop transitions, 48 changer transitions 0/203 dead transitions. [2024-06-27 21:03:57,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 203 transitions, 2317 flow [2024-06-27 21:03:57,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:03:57,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:03:57,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 21:03:57,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 21:03:57,426 INFO L175 Difference]: Start difference. First operand has 132 places, 156 transitions, 1667 flow. Second operand 9 states and 162 transitions. [2024-06-27 21:03:57,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 203 transitions, 2317 flow [2024-06-27 21:03:57,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 203 transitions, 2234 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 21:03:57,512 INFO L231 Difference]: Finished difference. Result has 137 places, 160 transitions, 1744 flow [2024-06-27 21:03:57,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1590, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1744, PETRI_PLACES=137, PETRI_TRANSITIONS=160} [2024-06-27 21:03:57,513 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 96 predicate places. [2024-06-27 21:03:57,513 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 160 transitions, 1744 flow [2024-06-27 21:03:57,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:57,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:57,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:57,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 21:03:57,515 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:03:57,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:57,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1850216385, now seen corresponding path program 3 times [2024-06-27 21:03:57,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:57,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368085459] [2024-06-27 21:03:57,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:57,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:57,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:58,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:58,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:58,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368085459] [2024-06-27 21:03:58,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368085459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:58,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:58,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:03:58,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289902015] [2024-06-27 21:03:58,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:58,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:03:58,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:58,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:03:58,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:03:58,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:03:58,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 160 transitions, 1744 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:58,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:58,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:03:58,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:58,876 INFO L124 PetriNetUnfolderBase]: 2031/3038 cut-off events. [2024-06-27 21:03:58,877 INFO L125 PetriNetUnfolderBase]: For 69845/69848 co-relation queries the response was YES. [2024-06-27 21:03:58,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19025 conditions, 3038 events. 2031/3038 cut-off events. For 69845/69848 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 14255 event pairs, 516 based on Foata normal form. 4/3039 useless extension candidates. Maximal degree in co-relation 18958. Up to 2738 conditions per place. [2024-06-27 21:03:58,904 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 149 selfloop transitions, 46 changer transitions 0/198 dead transitions. [2024-06-27 21:03:58,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 198 transitions, 2380 flow [2024-06-27 21:03:58,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:03:58,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:03:58,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 21:03:58,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-27 21:03:58,905 INFO L175 Difference]: Start difference. First operand has 137 places, 160 transitions, 1744 flow. Second operand 8 states and 139 transitions. [2024-06-27 21:03:58,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 198 transitions, 2380 flow [2024-06-27 21:03:58,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 198 transitions, 2268 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 21:03:58,987 INFO L231 Difference]: Finished difference. Result has 139 places, 166 transitions, 1833 flow [2024-06-27 21:03:58,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1638, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1833, PETRI_PLACES=139, PETRI_TRANSITIONS=166} [2024-06-27 21:03:58,988 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 98 predicate places. [2024-06-27 21:03:58,989 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 166 transitions, 1833 flow [2024-06-27 21:03:58,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:58,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:58,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:58,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 21:03:58,989 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:03:58,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:58,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1850223329, now seen corresponding path program 1 times [2024-06-27 21:03:58,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:58,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857406436] [2024-06-27 21:03:58,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:58,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:59,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:59,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:59,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:59,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857406436] [2024-06-27 21:03:59,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857406436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:59,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:59,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:03:59,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447830586] [2024-06-27 21:03:59,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:59,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:03:59,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:59,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:03:59,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:03:59,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:03:59,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 166 transitions, 1833 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:59,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:59,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:03:59,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:00,511 INFO L124 PetriNetUnfolderBase]: 2065/3092 cut-off events. [2024-06-27 21:04:00,512 INFO L125 PetriNetUnfolderBase]: For 78014/78017 co-relation queries the response was YES. [2024-06-27 21:04:00,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19804 conditions, 3092 events. 2065/3092 cut-off events. For 78014/78017 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 14579 event pairs, 506 based on Foata normal form. 8/3097 useless extension candidates. Maximal degree in co-relation 19735. Up to 2808 conditions per place. [2024-06-27 21:04:00,535 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 156 selfloop transitions, 39 changer transitions 0/198 dead transitions. [2024-06-27 21:04:00,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 198 transitions, 2335 flow [2024-06-27 21:04:00,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:04:00,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:04:00,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 21:04:00,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 21:04:00,537 INFO L175 Difference]: Start difference. First operand has 139 places, 166 transitions, 1833 flow. Second operand 8 states and 136 transitions. [2024-06-27 21:04:00,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 198 transitions, 2335 flow [2024-06-27 21:04:00,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 198 transitions, 2256 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 21:04:00,639 INFO L231 Difference]: Finished difference. Result has 142 places, 169 transitions, 1882 flow [2024-06-27 21:04:00,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1754, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1882, PETRI_PLACES=142, PETRI_TRANSITIONS=169} [2024-06-27 21:04:00,640 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 101 predicate places. [2024-06-27 21:04:00,640 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 169 transitions, 1882 flow [2024-06-27 21:04:00,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:00,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:00,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:00,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 21:04:00,641 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:00,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:00,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1855902689, now seen corresponding path program 2 times [2024-06-27 21:04:00,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:00,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611639303] [2024-06-27 21:04:00,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:00,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:00,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:01,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:01,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:01,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611639303] [2024-06-27 21:04:01,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611639303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:01,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:01,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:04:01,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783183533] [2024-06-27 21:04:01,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:01,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:04:01,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:01,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:04:01,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:04:01,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:04:01,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 169 transitions, 1882 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:01,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:01,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:04:01,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:02,001 INFO L124 PetriNetUnfolderBase]: 2082/3118 cut-off events. [2024-06-27 21:04:02,002 INFO L125 PetriNetUnfolderBase]: For 83336/83336 co-relation queries the response was YES. [2024-06-27 21:04:02,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20382 conditions, 3118 events. 2082/3118 cut-off events. For 83336/83336 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 14669 event pairs, 544 based on Foata normal form. 4/3120 useless extension candidates. Maximal degree in co-relation 20312. Up to 3025 conditions per place. [2024-06-27 21:04:02,026 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 173 selfloop transitions, 21 changer transitions 0/197 dead transitions. [2024-06-27 21:04:02,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 197 transitions, 2368 flow [2024-06-27 21:04:02,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:04:02,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:04:02,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 21:04:02,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-27 21:04:02,028 INFO L175 Difference]: Start difference. First operand has 142 places, 169 transitions, 1882 flow. Second operand 8 states and 127 transitions. [2024-06-27 21:04:02,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 197 transitions, 2368 flow [2024-06-27 21:04:02,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 197 transitions, 2264 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 21:04:02,132 INFO L231 Difference]: Finished difference. Result has 144 places, 171 transitions, 1861 flow [2024-06-27 21:04:02,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1778, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1861, PETRI_PLACES=144, PETRI_TRANSITIONS=171} [2024-06-27 21:04:02,133 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 103 predicate places. [2024-06-27 21:04:02,133 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 171 transitions, 1861 flow [2024-06-27 21:04:02,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:02,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:02,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:02,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 21:04:02,134 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:02,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:02,134 INFO L85 PathProgramCache]: Analyzing trace with hash -989613391, now seen corresponding path program 3 times [2024-06-27 21:04:02,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:02,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172155797] [2024-06-27 21:04:02,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:02,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:02,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:02,937 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 21:04:02,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:02,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172155797] [2024-06-27 21:04:02,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172155797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:02,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:02,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:04:02,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482558735] [2024-06-27 21:04:02,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:02,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:04:02,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:02,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:04:02,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:04:02,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:04:02,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 171 transitions, 1861 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:02,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:02,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:04:02,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:03,606 INFO L124 PetriNetUnfolderBase]: 2099/3145 cut-off events. [2024-06-27 21:04:03,607 INFO L125 PetriNetUnfolderBase]: For 89265/89265 co-relation queries the response was YES. [2024-06-27 21:04:03,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20655 conditions, 3145 events. 2099/3145 cut-off events. For 89265/89265 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 14798 event pairs, 549 based on Foata normal form. 4/3147 useless extension candidates. Maximal degree in co-relation 20584. Up to 3056 conditions per place. [2024-06-27 21:04:03,628 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 174 selfloop transitions, 21 changer transitions 0/198 dead transitions. [2024-06-27 21:04:03,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 198 transitions, 2349 flow [2024-06-27 21:04:03,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:04:03,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:04:03,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-27 21:04:03,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.390625 [2024-06-27 21:04:03,630 INFO L175 Difference]: Start difference. First operand has 144 places, 171 transitions, 1861 flow. Second operand 8 states and 125 transitions. [2024-06-27 21:04:03,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 198 transitions, 2349 flow [2024-06-27 21:04:03,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 198 transitions, 2284 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 21:04:03,727 INFO L231 Difference]: Finished difference. Result has 146 places, 173 transitions, 1884 flow [2024-06-27 21:04:03,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1796, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1884, PETRI_PLACES=146, PETRI_TRANSITIONS=173} [2024-06-27 21:04:03,728 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 105 predicate places. [2024-06-27 21:04:03,728 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 173 transitions, 1884 flow [2024-06-27 21:04:03,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:03,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:03,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:03,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 21:04:03,729 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 21:04:03,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:03,729 INFO L85 PathProgramCache]: Analyzing trace with hash -997894545, now seen corresponding path program 4 times [2024-06-27 21:04:03,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:03,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976512665] [2024-06-27 21:04:03,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:03,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:03,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:04,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:04,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:04,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976512665] [2024-06-27 21:04:04,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976512665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:04,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:04,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:04:04,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057723741] [2024-06-27 21:04:04,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:04,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:04:04,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:04,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:04:04,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:04:04,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:04:04,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 173 transitions, 1884 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:04,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:04,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:04:04,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:04,948 INFO L124 PetriNetUnfolderBase]: 2089/3132 cut-off events. [2024-06-27 21:04:04,948 INFO L125 PetriNetUnfolderBase]: For 94090/94093 co-relation queries the response was YES. [2024-06-27 21:04:04,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20746 conditions, 3132 events. 2089/3132 cut-off events. For 94090/94093 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 14774 event pairs, 546 based on Foata normal form. 6/3135 useless extension candidates. Maximal degree in co-relation 20674. Up to 3037 conditions per place. [2024-06-27 21:04:04,972 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 178 selfloop transitions, 19 changer transitions 0/200 dead transitions. [2024-06-27 21:04:04,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 200 transitions, 2360 flow [2024-06-27 21:04:04,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:04:04,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:04:04,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 21:04:04,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-27 21:04:04,974 INFO L175 Difference]: Start difference. First operand has 146 places, 173 transitions, 1884 flow. Second operand 8 states and 127 transitions. [2024-06-27 21:04:04,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 200 transitions, 2360 flow [2024-06-27 21:04:05,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 200 transitions, 2280 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 21:04:05,078 INFO L231 Difference]: Finished difference. Result has 148 places, 174 transitions, 1864 flow [2024-06-27 21:04:05,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1808, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1864, PETRI_PLACES=148, PETRI_TRANSITIONS=174} [2024-06-27 21:04:05,080 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 107 predicate places. [2024-06-27 21:04:05,080 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 174 transitions, 1864 flow [2024-06-27 21:04:05,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:05,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:05,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:05,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 21:04:05,081 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 21:04:05,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:05,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1653399337, now seen corresponding path program 1 times [2024-06-27 21:04:05,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:05,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695462790] [2024-06-27 21:04:05,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:05,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:05,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:05,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:05,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:05,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695462790] [2024-06-27 21:04:05,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695462790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:05,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:05,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:04:05,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645450077] [2024-06-27 21:04:05,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:05,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:04:05,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:05,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:04:05,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:04:05,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:04:05,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 174 transitions, 1864 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:05,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:05,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:04:05,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:06,375 INFO L124 PetriNetUnfolderBase]: 2084/3142 cut-off events. [2024-06-27 21:04:06,375 INFO L125 PetriNetUnfolderBase]: For 100223/100226 co-relation queries the response was YES. [2024-06-27 21:04:06,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20777 conditions, 3142 events. 2084/3142 cut-off events. For 100223/100226 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 15073 event pairs, 923 based on Foata normal form. 4/3143 useless extension candidates. Maximal degree in co-relation 20704. Up to 3026 conditions per place. [2024-06-27 21:04:06,400 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 167 selfloop transitions, 26 changer transitions 0/196 dead transitions. [2024-06-27 21:04:06,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 196 transitions, 2333 flow [2024-06-27 21:04:06,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:04:06,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:04:06,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-27 21:04:06,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.378125 [2024-06-27 21:04:06,401 INFO L175 Difference]: Start difference. First operand has 148 places, 174 transitions, 1864 flow. Second operand 8 states and 121 transitions. [2024-06-27 21:04:06,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 196 transitions, 2333 flow [2024-06-27 21:04:06,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 196 transitions, 2283 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 21:04:06,514 INFO L231 Difference]: Finished difference. Result has 151 places, 176 transitions, 1912 flow [2024-06-27 21:04:06,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1816, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1912, PETRI_PLACES=151, PETRI_TRANSITIONS=176} [2024-06-27 21:04:06,515 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 110 predicate places. [2024-06-27 21:04:06,515 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 176 transitions, 1912 flow [2024-06-27 21:04:06,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:06,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:06,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:06,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 21:04:06,516 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:06,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:06,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1653102419, now seen corresponding path program 4 times [2024-06-27 21:04:06,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:06,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400191458] [2024-06-27 21:04:06,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:06,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:06,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:07,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:07,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:07,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400191458] [2024-06-27 21:04:07,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400191458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:07,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:07,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:04:07,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992932841] [2024-06-27 21:04:07,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:07,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:04:07,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:07,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:04:07,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:04:07,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:04:07,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 176 transitions, 1912 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:07,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:07,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:04:07,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:07,919 INFO L124 PetriNetUnfolderBase]: 2076/3129 cut-off events. [2024-06-27 21:04:07,919 INFO L125 PetriNetUnfolderBase]: For 104835/104835 co-relation queries the response was YES. [2024-06-27 21:04:07,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20802 conditions, 3129 events. 2076/3129 cut-off events. For 104835/104835 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 14961 event pairs, 907 based on Foata normal form. 4/3131 useless extension candidates. Maximal degree in co-relation 20727. Up to 3032 conditions per place. [2024-06-27 21:04:07,945 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 181 selfloop transitions, 18 changer transitions 0/202 dead transitions. [2024-06-27 21:04:07,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 202 transitions, 2408 flow [2024-06-27 21:04:07,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:04:07,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:04:07,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-27 21:04:07,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-27 21:04:07,946 INFO L175 Difference]: Start difference. First operand has 151 places, 176 transitions, 1912 flow. Second operand 8 states and 124 transitions. [2024-06-27 21:04:07,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 202 transitions, 2408 flow [2024-06-27 21:04:08,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 202 transitions, 2341 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 21:04:08,064 INFO L231 Difference]: Finished difference. Result has 154 places, 178 transitions, 1930 flow [2024-06-27 21:04:08,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1845, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1930, PETRI_PLACES=154, PETRI_TRANSITIONS=178} [2024-06-27 21:04:08,064 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 113 predicate places. [2024-06-27 21:04:08,065 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 178 transitions, 1930 flow [2024-06-27 21:04:08,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:08,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:08,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:08,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 21:04:08,065 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:08,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:08,066 INFO L85 PathProgramCache]: Analyzing trace with hash 271026309, now seen corresponding path program 1 times [2024-06-27 21:04:08,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:08,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474559064] [2024-06-27 21:04:08,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:08,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:08,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:08,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:08,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:08,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474559064] [2024-06-27 21:04:08,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474559064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:08,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:08,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:04:08,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001502511] [2024-06-27 21:04:08,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:08,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:04:08,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:08,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:04:08,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:04:08,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:04:08,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 178 transitions, 1930 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:08,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:08,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:04:08,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:09,568 INFO L124 PetriNetUnfolderBase]: 2714/4119 cut-off events. [2024-06-27 21:04:09,568 INFO L125 PetriNetUnfolderBase]: For 133535/133542 co-relation queries the response was YES. [2024-06-27 21:04:09,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26903 conditions, 4119 events. 2714/4119 cut-off events. For 133535/133542 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 20981 event pairs, 624 based on Foata normal form. 20/4136 useless extension candidates. Maximal degree in co-relation 26826. Up to 3091 conditions per place. [2024-06-27 21:04:09,599 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 232 selfloop transitions, 76 changer transitions 0/311 dead transitions. [2024-06-27 21:04:09,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 311 transitions, 3776 flow [2024-06-27 21:04:09,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:04:09,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:04:09,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-27 21:04:09,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 21:04:09,601 INFO L175 Difference]: Start difference. First operand has 154 places, 178 transitions, 1930 flow. Second operand 10 states and 180 transitions. [2024-06-27 21:04:09,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 311 transitions, 3776 flow [2024-06-27 21:04:09,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 311 transitions, 3713 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 21:04:09,780 INFO L231 Difference]: Finished difference. Result has 164 places, 238 transitions, 2857 flow [2024-06-27 21:04:09,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1867, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2857, PETRI_PLACES=164, PETRI_TRANSITIONS=238} [2024-06-27 21:04:09,781 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 123 predicate places. [2024-06-27 21:04:09,781 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 238 transitions, 2857 flow [2024-06-27 21:04:09,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:09,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:09,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:09,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 21:04:09,781 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:09,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:09,782 INFO L85 PathProgramCache]: Analyzing trace with hash 790774673, now seen corresponding path program 2 times [2024-06-27 21:04:09,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:09,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327811660] [2024-06-27 21:04:09,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:09,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:09,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:10,394 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 21:04:10,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:10,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327811660] [2024-06-27 21:04:10,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327811660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:10,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:10,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:04:10,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961810388] [2024-06-27 21:04:10,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:10,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:04:10,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:10,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:04:10,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:04:10,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:04:10,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 238 transitions, 2857 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:10,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:10,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:04:10,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:11,484 INFO L124 PetriNetUnfolderBase]: 2979/4541 cut-off events. [2024-06-27 21:04:11,484 INFO L125 PetriNetUnfolderBase]: For 155514/155525 co-relation queries the response was YES. [2024-06-27 21:04:11,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31317 conditions, 4541 events. 2979/4541 cut-off events. For 155514/155525 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 23764 event pairs, 672 based on Foata normal form. 24/4562 useless extension candidates. Maximal degree in co-relation 31234. Up to 3667 conditions per place. [2024-06-27 21:04:11,524 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 237 selfloop transitions, 88 changer transitions 0/328 dead transitions. [2024-06-27 21:04:11,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 328 transitions, 4349 flow [2024-06-27 21:04:11,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:04:11,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:04:11,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 197 transitions. [2024-06-27 21:04:11,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2024-06-27 21:04:11,526 INFO L175 Difference]: Start difference. First operand has 164 places, 238 transitions, 2857 flow. Second operand 11 states and 197 transitions. [2024-06-27 21:04:11,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 328 transitions, 4349 flow [2024-06-27 21:04:11,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 328 transitions, 4296 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-27 21:04:11,813 INFO L231 Difference]: Finished difference. Result has 177 places, 258 transitions, 3347 flow [2024-06-27 21:04:11,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2808, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3347, PETRI_PLACES=177, PETRI_TRANSITIONS=258} [2024-06-27 21:04:11,813 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 136 predicate places. [2024-06-27 21:04:11,813 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 258 transitions, 3347 flow [2024-06-27 21:04:11,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:11,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:11,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:11,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 21:04:11,814 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:11,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:11,814 INFO L85 PathProgramCache]: Analyzing trace with hash 790778393, now seen corresponding path program 3 times [2024-06-27 21:04:11,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:11,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848230874] [2024-06-27 21:04:11,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:11,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:11,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:12,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:12,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:12,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848230874] [2024-06-27 21:04:12,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848230874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:12,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:12,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:04:12,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313069336] [2024-06-27 21:04:12,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:12,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:04:12,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:12,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:04:12,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:04:12,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:04:12,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 258 transitions, 3347 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:12,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:12,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:04:12,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:13,582 INFO L124 PetriNetUnfolderBase]: 2943/4485 cut-off events. [2024-06-27 21:04:13,582 INFO L125 PetriNetUnfolderBase]: For 157748/157759 co-relation queries the response was YES. [2024-06-27 21:04:13,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31347 conditions, 4485 events. 2943/4485 cut-off events. For 157748/157759 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 23372 event pairs, 676 based on Foata normal form. 28/4510 useless extension candidates. Maximal degree in co-relation 31258. Up to 3772 conditions per place. [2024-06-27 21:04:13,623 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 235 selfloop transitions, 89 changer transitions 0/327 dead transitions. [2024-06-27 21:04:13,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 327 transitions, 4455 flow [2024-06-27 21:04:13,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:04:13,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:04:13,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 205 transitions. [2024-06-27 21:04:13,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4270833333333333 [2024-06-27 21:04:13,625 INFO L175 Difference]: Start difference. First operand has 177 places, 258 transitions, 3347 flow. Second operand 12 states and 205 transitions. [2024-06-27 21:04:13,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 327 transitions, 4455 flow [2024-06-27 21:04:13,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 327 transitions, 4336 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 21:04:13,906 INFO L231 Difference]: Finished difference. Result has 186 places, 262 transitions, 3506 flow [2024-06-27 21:04:13,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3236, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3506, PETRI_PLACES=186, PETRI_TRANSITIONS=262} [2024-06-27 21:04:13,907 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 145 predicate places. [2024-06-27 21:04:13,907 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 262 transitions, 3506 flow [2024-06-27 21:04:13,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:13,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:13,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:13,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 21:04:13,908 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:13,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:13,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1145370065, now seen corresponding path program 4 times [2024-06-27 21:04:13,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:13,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431559405] [2024-06-27 21:04:13,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:13,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:13,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:14,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:14,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:14,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431559405] [2024-06-27 21:04:14,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431559405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:14,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:14,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:04:14,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821871757] [2024-06-27 21:04:14,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:14,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:04:14,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:14,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:04:14,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:04:14,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:04:14,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 262 transitions, 3506 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:14,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:14,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:04:14,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:15,520 INFO L124 PetriNetUnfolderBase]: 3547/5561 cut-off events. [2024-06-27 21:04:15,521 INFO L125 PetriNetUnfolderBase]: For 200269/200284 co-relation queries the response was YES. [2024-06-27 21:04:15,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38730 conditions, 5561 events. 3547/5561 cut-off events. For 200269/200284 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 32035 event pairs, 606 based on Foata normal form. 26/5563 useless extension candidates. Maximal degree in co-relation 38637. Up to 2565 conditions per place. [2024-06-27 21:04:15,565 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 202 selfloop transitions, 134 changer transitions 0/352 dead transitions. [2024-06-27 21:04:15,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 352 transitions, 5163 flow [2024-06-27 21:04:15,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:04:15,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:04:15,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 21:04:15,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49444444444444446 [2024-06-27 21:04:15,567 INFO L175 Difference]: Start difference. First operand has 186 places, 262 transitions, 3506 flow. Second operand 9 states and 178 transitions. [2024-06-27 21:04:15,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 352 transitions, 5163 flow [2024-06-27 21:04:15,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 352 transitions, 5022 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 21:04:15,903 INFO L231 Difference]: Finished difference. Result has 192 places, 287 transitions, 4168 flow [2024-06-27 21:04:15,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3368, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4168, PETRI_PLACES=192, PETRI_TRANSITIONS=287} [2024-06-27 21:04:15,904 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 151 predicate places. [2024-06-27 21:04:15,904 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 287 transitions, 4168 flow [2024-06-27 21:04:15,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:15,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:15,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:15,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 21:04:15,905 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:15,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:15,905 INFO L85 PathProgramCache]: Analyzing trace with hash -528240167, now seen corresponding path program 5 times [2024-06-27 21:04:15,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:15,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863268845] [2024-06-27 21:04:15,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:15,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:15,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:16,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:16,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:16,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863268845] [2024-06-27 21:04:16,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863268845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:16,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:16,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:04:16,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220988691] [2024-06-27 21:04:16,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:16,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:04:16,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:16,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:04:16,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:04:16,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:04:16,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 287 transitions, 4168 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:16,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:16,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:04:16,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:17,553 INFO L124 PetriNetUnfolderBase]: 4214/6588 cut-off events. [2024-06-27 21:04:17,553 INFO L125 PetriNetUnfolderBase]: For 257326/257355 co-relation queries the response was YES. [2024-06-27 21:04:17,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48676 conditions, 6588 events. 4214/6588 cut-off events. For 257326/257355 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 39219 event pairs, 981 based on Foata normal form. 40/6587 useless extension candidates. Maximal degree in co-relation 48578. Up to 3634 conditions per place. [2024-06-27 21:04:17,619 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 218 selfloop transitions, 177 changer transitions 0/411 dead transitions. [2024-06-27 21:04:17,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 411 transitions, 6660 flow [2024-06-27 21:04:17,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:04:17,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:04:17,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-27 21:04:17,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49166666666666664 [2024-06-27 21:04:17,620 INFO L175 Difference]: Start difference. First operand has 192 places, 287 transitions, 4168 flow. Second operand 9 states and 177 transitions. [2024-06-27 21:04:17,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 411 transitions, 6660 flow [2024-06-27 21:04:18,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 411 transitions, 6546 flow, removed 45 selfloop flow, removed 3 redundant places. [2024-06-27 21:04:18,283 INFO L231 Difference]: Finished difference. Result has 201 places, 339 transitions, 5424 flow [2024-06-27 21:04:18,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4100, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5424, PETRI_PLACES=201, PETRI_TRANSITIONS=339} [2024-06-27 21:04:18,284 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 160 predicate places. [2024-06-27 21:04:18,284 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 339 transitions, 5424 flow [2024-06-27 21:04:18,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:18,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:18,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:18,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 21:04:18,285 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:18,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:18,285 INFO L85 PathProgramCache]: Analyzing trace with hash 675704353, now seen corresponding path program 6 times [2024-06-27 21:04:18,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:18,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637996786] [2024-06-27 21:04:18,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:18,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:18,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:18,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:18,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:18,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637996786] [2024-06-27 21:04:18,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637996786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:18,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:18,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:04:18,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628693271] [2024-06-27 21:04:18,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:18,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:04:18,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:18,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:04:18,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:04:18,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:04:18,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 339 transitions, 5424 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:18,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:18,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:04:18,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:20,154 INFO L124 PetriNetUnfolderBase]: 4320/6785 cut-off events. [2024-06-27 21:04:20,154 INFO L125 PetriNetUnfolderBase]: For 273155/273178 co-relation queries the response was YES. [2024-06-27 21:04:20,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51428 conditions, 6785 events. 4320/6785 cut-off events. For 273155/273178 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 40729 event pairs, 1247 based on Foata normal form. 46/6813 useless extension candidates. Maximal degree in co-relation 51326. Up to 5240 conditions per place. [2024-06-27 21:04:20,216 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 229 selfloop transitions, 161 changer transitions 0/406 dead transitions. [2024-06-27 21:04:20,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 406 transitions, 7008 flow [2024-06-27 21:04:20,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:04:20,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:04:20,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 21:04:20,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861111111111111 [2024-06-27 21:04:20,219 INFO L175 Difference]: Start difference. First operand has 201 places, 339 transitions, 5424 flow. Second operand 9 states and 175 transitions. [2024-06-27 21:04:20,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 406 transitions, 7008 flow [2024-06-27 21:04:20,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 406 transitions, 6732 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-27 21:04:20,906 INFO L231 Difference]: Finished difference. Result has 207 places, 348 transitions, 5756 flow [2024-06-27 21:04:20,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5159, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5756, PETRI_PLACES=207, PETRI_TRANSITIONS=348} [2024-06-27 21:04:20,906 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 166 predicate places. [2024-06-27 21:04:20,906 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 348 transitions, 5756 flow [2024-06-27 21:04:20,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:20,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:20,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:20,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 21:04:20,907 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:20,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:20,907 INFO L85 PathProgramCache]: Analyzing trace with hash -526366217, now seen corresponding path program 7 times [2024-06-27 21:04:20,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:20,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851206434] [2024-06-27 21:04:20,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:20,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:20,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:21,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:21,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:21,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851206434] [2024-06-27 21:04:21,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851206434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:21,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:21,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:04:21,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443844062] [2024-06-27 21:04:21,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:21,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:04:21,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:21,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:04:21,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:04:21,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:04:21,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 348 transitions, 5756 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:21,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:21,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:04:21,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:22,796 INFO L124 PetriNetUnfolderBase]: 4339/6808 cut-off events. [2024-06-27 21:04:22,797 INFO L125 PetriNetUnfolderBase]: For 260612/260635 co-relation queries the response was YES. [2024-06-27 21:04:22,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52032 conditions, 6808 events. 4339/6808 cut-off events. For 260612/260635 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 40941 event pairs, 1117 based on Foata normal form. 40/6830 useless extension candidates. Maximal degree in co-relation 51928. Up to 4932 conditions per place. [2024-06-27 21:04:22,871 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 232 selfloop transitions, 167 changer transitions 0/415 dead transitions. [2024-06-27 21:04:22,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 415 transitions, 7350 flow [2024-06-27 21:04:22,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:04:22,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:04:22,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-27 21:04:22,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49166666666666664 [2024-06-27 21:04:22,872 INFO L175 Difference]: Start difference. First operand has 207 places, 348 transitions, 5756 flow. Second operand 9 states and 177 transitions. [2024-06-27 21:04:22,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 415 transitions, 7350 flow [2024-06-27 21:04:23,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 415 transitions, 7042 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 21:04:23,598 INFO L231 Difference]: Finished difference. Result has 212 places, 353 transitions, 5948 flow [2024-06-27 21:04:23,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5448, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5948, PETRI_PLACES=212, PETRI_TRANSITIONS=353} [2024-06-27 21:04:23,599 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 171 predicate places. [2024-06-27 21:04:23,599 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 353 transitions, 5948 flow [2024-06-27 21:04:23,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:23,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:23,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:23,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 21:04:23,600 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:23,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:23,600 INFO L85 PathProgramCache]: Analyzing trace with hash -2118087463, now seen corresponding path program 8 times [2024-06-27 21:04:23,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:23,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800997952] [2024-06-27 21:04:23,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:23,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:23,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:24,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:24,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:24,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800997952] [2024-06-27 21:04:24,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800997952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:24,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:24,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:04:24,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588555944] [2024-06-27 21:04:24,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:24,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:04:24,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:24,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:04:24,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:04:24,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:04:24,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 353 transitions, 5948 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:24,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:24,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:04:24,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:25,969 INFO L124 PetriNetUnfolderBase]: 4846/7565 cut-off events. [2024-06-27 21:04:25,969 INFO L125 PetriNetUnfolderBase]: For 298124/298137 co-relation queries the response was YES. [2024-06-27 21:04:26,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59238 conditions, 7565 events. 4846/7565 cut-off events. For 298124/298137 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 46010 event pairs, 1514 based on Foata normal form. 34/7596 useless extension candidates. Maximal degree in co-relation 59132. Up to 6446 conditions per place. [2024-06-27 21:04:26,041 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 350 selfloop transitions, 95 changer transitions 0/448 dead transitions. [2024-06-27 21:04:26,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 448 transitions, 8160 flow [2024-06-27 21:04:26,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:04:26,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:04:26,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-27 21:04:26,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4575 [2024-06-27 21:04:26,043 INFO L175 Difference]: Start difference. First operand has 212 places, 353 transitions, 5948 flow. Second operand 10 states and 183 transitions. [2024-06-27 21:04:26,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 448 transitions, 8160 flow [2024-06-27 21:04:26,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 448 transitions, 7921 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 21:04:26,799 INFO L231 Difference]: Finished difference. Result has 220 places, 390 transitions, 6875 flow [2024-06-27 21:04:26,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5735, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6875, PETRI_PLACES=220, PETRI_TRANSITIONS=390} [2024-06-27 21:04:26,799 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 179 predicate places. [2024-06-27 21:04:26,799 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 390 transitions, 6875 flow [2024-06-27 21:04:26,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:26,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:26,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:26,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 21:04:26,800 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:26,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:26,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1089214143, now seen corresponding path program 9 times [2024-06-27 21:04:26,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:26,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799218040] [2024-06-27 21:04:26,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:26,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:26,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:27,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:27,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:27,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799218040] [2024-06-27 21:04:27,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799218040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:27,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:27,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:04:27,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671437261] [2024-06-27 21:04:27,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:27,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:04:27,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:27,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:04:27,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:04:27,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:04:27,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 390 transitions, 6875 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:27,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:27,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:04:27,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:29,247 INFO L124 PetriNetUnfolderBase]: 4998/7827 cut-off events. [2024-06-27 21:04:29,247 INFO L125 PetriNetUnfolderBase]: For 310874/310889 co-relation queries the response was YES. [2024-06-27 21:04:29,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61943 conditions, 7827 events. 4998/7827 cut-off events. For 310874/310889 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 48211 event pairs, 1612 based on Foata normal form. 48/7872 useless extension candidates. Maximal degree in co-relation 61832. Up to 7008 conditions per place. [2024-06-27 21:04:29,345 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 354 selfloop transitions, 92 changer transitions 0/449 dead transitions. [2024-06-27 21:04:29,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 449 transitions, 8185 flow [2024-06-27 21:04:29,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:04:29,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:04:29,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-27 21:04:29,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-06-27 21:04:29,347 INFO L175 Difference]: Start difference. First operand has 220 places, 390 transitions, 6875 flow. Second operand 11 states and 192 transitions. [2024-06-27 21:04:29,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 449 transitions, 8185 flow [2024-06-27 21:04:30,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 449 transitions, 8113 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-27 21:04:30,216 INFO L231 Difference]: Finished difference. Result has 230 places, 394 transitions, 7136 flow [2024-06-27 21:04:30,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6809, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7136, PETRI_PLACES=230, PETRI_TRANSITIONS=394} [2024-06-27 21:04:30,217 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 189 predicate places. [2024-06-27 21:04:30,217 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 394 transitions, 7136 flow [2024-06-27 21:04:30,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:30,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:30,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:30,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 21:04:30,218 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:30,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:30,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1094928435, now seen corresponding path program 1 times [2024-06-27 21:04:30,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:30,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252377496] [2024-06-27 21:04:30,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:30,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:30,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:30,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:30,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:30,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252377496] [2024-06-27 21:04:30,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252377496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:30,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:30,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:04:30,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016813814] [2024-06-27 21:04:30,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:30,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:04:30,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:30,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:04:30,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:04:30,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:04:30,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 394 transitions, 7136 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:30,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:30,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:04:30,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:32,632 INFO L124 PetriNetUnfolderBase]: 5071/7928 cut-off events. [2024-06-27 21:04:32,632 INFO L125 PetriNetUnfolderBase]: For 304515/304538 co-relation queries the response was YES. [2024-06-27 21:04:32,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63715 conditions, 7928 events. 5071/7928 cut-off events. For 304515/304538 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 48706 event pairs, 1629 based on Foata normal form. 26/7951 useless extension candidates. Maximal degree in co-relation 63600. Up to 7244 conditions per place. [2024-06-27 21:04:32,720 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 329 selfloop transitions, 121 changer transitions 0/453 dead transitions. [2024-06-27 21:04:32,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 453 transitions, 8740 flow [2024-06-27 21:04:32,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:04:32,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:04:32,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 21:04:32,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-27 21:04:32,722 INFO L175 Difference]: Start difference. First operand has 230 places, 394 transitions, 7136 flow. Second operand 9 states and 154 transitions. [2024-06-27 21:04:32,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 453 transitions, 8740 flow [2024-06-27 21:04:33,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 453 transitions, 8571 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 21:04:33,561 INFO L231 Difference]: Finished difference. Result has 236 places, 418 transitions, 7889 flow [2024-06-27 21:04:33,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6983, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7889, PETRI_PLACES=236, PETRI_TRANSITIONS=418} [2024-06-27 21:04:33,562 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 195 predicate places. [2024-06-27 21:04:33,562 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 418 transitions, 7889 flow [2024-06-27 21:04:33,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:33,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:33,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:33,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 21:04:33,562 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:33,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:33,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1094720673, now seen corresponding path program 10 times [2024-06-27 21:04:33,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:33,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297134008] [2024-06-27 21:04:33,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:33,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:33,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:34,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:34,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:34,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297134008] [2024-06-27 21:04:34,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297134008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:34,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:34,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:04:34,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568469056] [2024-06-27 21:04:34,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:34,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:04:34,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:34,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:04:34,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:04:34,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:04:34,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 418 transitions, 7889 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:34,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:34,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:04:34,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:36,086 INFO L124 PetriNetUnfolderBase]: 5098/7977 cut-off events. [2024-06-27 21:04:36,086 INFO L125 PetriNetUnfolderBase]: For 323880/323903 co-relation queries the response was YES. [2024-06-27 21:04:36,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64418 conditions, 7977 events. 5098/7977 cut-off events. For 323880/323903 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 49280 event pairs, 1631 based on Foata normal form. 50/8024 useless extension candidates. Maximal degree in co-relation 64299. Up to 7170 conditions per place. [2024-06-27 21:04:36,353 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 371 selfloop transitions, 93 changer transitions 0/467 dead transitions. [2024-06-27 21:04:36,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 467 transitions, 9187 flow [2024-06-27 21:04:36,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:04:36,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:04:36,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-27 21:04:36,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43 [2024-06-27 21:04:36,355 INFO L175 Difference]: Start difference. First operand has 236 places, 418 transitions, 7889 flow. Second operand 10 states and 172 transitions. [2024-06-27 21:04:36,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 467 transitions, 9187 flow [2024-06-27 21:04:37,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 467 transitions, 9020 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 21:04:37,181 INFO L231 Difference]: Finished difference. Result has 244 places, 423 transitions, 8082 flow [2024-06-27 21:04:37,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7722, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8082, PETRI_PLACES=244, PETRI_TRANSITIONS=423} [2024-06-27 21:04:37,182 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 203 predicate places. [2024-06-27 21:04:37,182 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 423 transitions, 8082 flow [2024-06-27 21:04:37,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:37,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:37,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:37,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 21:04:37,187 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:37,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:37,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1094935875, now seen corresponding path program 2 times [2024-06-27 21:04:37,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:37,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363961430] [2024-06-27 21:04:37,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:37,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:37,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:38,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:38,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:38,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363961430] [2024-06-27 21:04:38,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363961430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:38,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:38,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:04:38,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920173184] [2024-06-27 21:04:38,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:38,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:04:38,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:38,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:04:38,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:04:38,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:04:38,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 423 transitions, 8082 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:38,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:38,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:04:38,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:39,896 INFO L124 PetriNetUnfolderBase]: 5150/8053 cut-off events. [2024-06-27 21:04:39,897 INFO L125 PetriNetUnfolderBase]: For 320270/320293 co-relation queries the response was YES. [2024-06-27 21:04:39,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65118 conditions, 8053 events. 5150/8053 cut-off events. For 320270/320293 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 49800 event pairs, 1590 based on Foata normal form. 26/8076 useless extension candidates. Maximal degree in co-relation 64997. Up to 7201 conditions per place. [2024-06-27 21:04:39,980 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 335 selfloop transitions, 133 changer transitions 0/471 dead transitions. [2024-06-27 21:04:39,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 471 transitions, 9484 flow [2024-06-27 21:04:39,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:04:39,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:04:39,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 21:04:39,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-27 21:04:39,982 INFO L175 Difference]: Start difference. First operand has 244 places, 423 transitions, 8082 flow. Second operand 9 states and 155 transitions. [2024-06-27 21:04:39,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 471 transitions, 9484 flow [2024-06-27 21:04:40,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 471 transitions, 9346 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 21:04:40,804 INFO L231 Difference]: Finished difference. Result has 249 places, 435 transitions, 8482 flow [2024-06-27 21:04:40,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7944, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8482, PETRI_PLACES=249, PETRI_TRANSITIONS=435} [2024-06-27 21:04:40,805 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 208 predicate places. [2024-06-27 21:04:40,805 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 435 transitions, 8482 flow [2024-06-27 21:04:40,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:40,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:40,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:40,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 21:04:40,806 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 21:04:40,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:40,806 INFO L85 PathProgramCache]: Analyzing trace with hash 536628535, now seen corresponding path program 1 times [2024-06-27 21:04:40,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:40,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278192594] [2024-06-27 21:04:40,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:40,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:40,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:41,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:41,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:41,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278192594] [2024-06-27 21:04:41,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278192594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:41,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:41,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:04:41,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622428577] [2024-06-27 21:04:41,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:41,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:04:41,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:41,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:04:41,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:04:41,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:04:41,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 435 transitions, 8482 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:41,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:41,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:04:41,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:43,254 INFO L124 PetriNetUnfolderBase]: 5165/8078 cut-off events. [2024-06-27 21:04:43,255 INFO L125 PetriNetUnfolderBase]: For 331033/331037 co-relation queries the response was YES. [2024-06-27 21:04:43,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66014 conditions, 8078 events. 5165/8078 cut-off events. For 331033/331037 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 50020 event pairs, 2078 based on Foata normal form. 6/8082 useless extension candidates. Maximal degree in co-relation 65891. Up to 7892 conditions per place. [2024-06-27 21:04:43,338 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 437 selfloop transitions, 28 changer transitions 0/468 dead transitions. [2024-06-27 21:04:43,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 468 transitions, 9698 flow [2024-06-27 21:04:43,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:04:43,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:04:43,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 21:04:43,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 21:04:43,340 INFO L175 Difference]: Start difference. First operand has 249 places, 435 transitions, 8482 flow. Second operand 8 states and 128 transitions. [2024-06-27 21:04:43,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 468 transitions, 9698 flow [2024-06-27 21:04:44,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 468 transitions, 9484 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-27 21:04:44,331 INFO L231 Difference]: Finished difference. Result has 254 places, 446 transitions, 8495 flow [2024-06-27 21:04:44,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8272, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8495, PETRI_PLACES=254, PETRI_TRANSITIONS=446} [2024-06-27 21:04:44,332 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 213 predicate places. [2024-06-27 21:04:44,332 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 446 transitions, 8495 flow [2024-06-27 21:04:44,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:44,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:44,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:44,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 21:04:44,333 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:44,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:44,334 INFO L85 PathProgramCache]: Analyzing trace with hash -2043118323, now seen corresponding path program 11 times [2024-06-27 21:04:44,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:44,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202947110] [2024-06-27 21:04:44,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:44,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:44,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:45,095 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 21:04:45,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:45,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202947110] [2024-06-27 21:04:45,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202947110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:45,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:45,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:04:45,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813685046] [2024-06-27 21:04:45,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:45,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:04:45,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:45,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:04:45,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:04:45,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:04:45,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 446 transitions, 8495 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:45,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:45,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:04:45,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:47,061 INFO L124 PetriNetUnfolderBase]: 5555/8689 cut-off events. [2024-06-27 21:04:47,062 INFO L125 PetriNetUnfolderBase]: For 401156/401191 co-relation queries the response was YES. [2024-06-27 21:04:47,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71555 conditions, 8689 events. 5555/8689 cut-off events. For 401156/401191 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 54297 event pairs, 1228 based on Foata normal form. 52/8738 useless extension candidates. Maximal degree in co-relation 71428. Up to 3842 conditions per place. [2024-06-27 21:04:47,165 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 244 selfloop transitions, 263 changer transitions 0/510 dead transitions. [2024-06-27 21:04:47,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 510 transitions, 10186 flow [2024-06-27 21:04:47,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:04:47,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:04:47,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 21:04:47,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527777777777778 [2024-06-27 21:04:47,167 INFO L175 Difference]: Start difference. First operand has 254 places, 446 transitions, 8495 flow. Second operand 9 states and 163 transitions. [2024-06-27 21:04:47,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 510 transitions, 10186 flow [2024-06-27 21:04:48,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 510 transitions, 10145 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-27 21:04:48,277 INFO L231 Difference]: Finished difference. Result has 263 places, 458 transitions, 9418 flow [2024-06-27 21:04:48,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8454, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9418, PETRI_PLACES=263, PETRI_TRANSITIONS=458} [2024-06-27 21:04:48,278 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 222 predicate places. [2024-06-27 21:04:48,279 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 458 transitions, 9418 flow [2024-06-27 21:04:48,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:48,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:48,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:48,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 21:04:48,280 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:48,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:48,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1421493213, now seen corresponding path program 12 times [2024-06-27 21:04:48,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:48,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231405050] [2024-06-27 21:04:48,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:48,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:48,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:48,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:48,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:48,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231405050] [2024-06-27 21:04:48,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231405050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:48,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:48,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:04:48,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969778873] [2024-06-27 21:04:48,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:48,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:04:48,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:48,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:04:48,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:04:49,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:04:49,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 458 transitions, 9418 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:49,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:49,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:04:49,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:51,244 INFO L124 PetriNetUnfolderBase]: 6289/9904 cut-off events. [2024-06-27 21:04:51,244 INFO L125 PetriNetUnfolderBase]: For 494244/494283 co-relation queries the response was YES. [2024-06-27 21:04:51,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84557 conditions, 9904 events. 6289/9904 cut-off events. For 494244/494283 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 64303 event pairs, 1750 based on Foata normal form. 64/9965 useless extension candidates. Maximal degree in co-relation 84426. Up to 7389 conditions per place. [2024-06-27 21:04:51,348 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 293 selfloop transitions, 236 changer transitions 0/532 dead transitions. [2024-06-27 21:04:51,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 532 transitions, 11639 flow [2024-06-27 21:04:51,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:04:51,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:04:51,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 21:04:51,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 21:04:51,354 INFO L175 Difference]: Start difference. First operand has 263 places, 458 transitions, 9418 flow. Second operand 9 states and 165 transitions. [2024-06-27 21:04:51,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 532 transitions, 11639 flow [2024-06-27 21:04:52,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 532 transitions, 11313 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-27 21:04:52,635 INFO L231 Difference]: Finished difference. Result has 268 places, 484 transitions, 10251 flow [2024-06-27 21:04:52,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9120, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10251, PETRI_PLACES=268, PETRI_TRANSITIONS=484} [2024-06-27 21:04:52,636 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 227 predicate places. [2024-06-27 21:04:52,636 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 484 transitions, 10251 flow [2024-06-27 21:04:52,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:52,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:52,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:52,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 21:04:52,637 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:52,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:52,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1191982683, now seen corresponding path program 13 times [2024-06-27 21:04:52,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:52,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184723132] [2024-06-27 21:04:52,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:52,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:52,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:53,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:53,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:53,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184723132] [2024-06-27 21:04:53,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184723132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:53,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:53,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:04:53,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375548880] [2024-06-27 21:04:53,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:53,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:04:53,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:53,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:04:53,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:04:53,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:04:53,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 484 transitions, 10251 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:53,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:53,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:04:53,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:56,009 INFO L124 PetriNetUnfolderBase]: 6429/10175 cut-off events. [2024-06-27 21:04:56,010 INFO L125 PetriNetUnfolderBase]: For 506712/506749 co-relation queries the response was YES. [2024-06-27 21:04:56,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85777 conditions, 10175 events. 6429/10175 cut-off events. For 506712/506749 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 67026 event pairs, 1978 based on Foata normal form. 122/10294 useless extension candidates. Maximal degree in co-relation 85644. Up to 7637 conditions per place. [2024-06-27 21:04:56,122 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 301 selfloop transitions, 241 changer transitions 0/545 dead transitions. [2024-06-27 21:04:56,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 545 transitions, 11875 flow [2024-06-27 21:04:56,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:04:56,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:04:56,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-27 21:04:56,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42954545454545456 [2024-06-27 21:04:56,124 INFO L175 Difference]: Start difference. First operand has 268 places, 484 transitions, 10251 flow. Second operand 11 states and 189 transitions. [2024-06-27 21:04:56,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 545 transitions, 11875 flow [2024-06-27 21:04:57,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 545 transitions, 11627 flow, removed 62 selfloop flow, removed 3 redundant places. [2024-06-27 21:04:57,484 INFO L231 Difference]: Finished difference. Result has 276 places, 491 transitions, 10790 flow [2024-06-27 21:04:57,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10033, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10790, PETRI_PLACES=276, PETRI_TRANSITIONS=491} [2024-06-27 21:04:57,484 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 235 predicate places. [2024-06-27 21:04:57,485 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 491 transitions, 10790 flow [2024-06-27 21:04:57,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:57,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:57,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:57,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 21:04:57,485 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:57,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:57,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1334801403, now seen corresponding path program 14 times [2024-06-27 21:04:57,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:57,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462778063] [2024-06-27 21:04:57,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:57,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:57,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:58,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:58,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:58,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462778063] [2024-06-27 21:04:58,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462778063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:58,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:58,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:04:58,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861156060] [2024-06-27 21:04:58,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:58,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:04:58,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:58,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:04:58,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:04:58,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:04:58,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 491 transitions, 10790 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:58,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:58,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:04:58,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:00,708 INFO L124 PetriNetUnfolderBase]: 6791/10773 cut-off events. [2024-06-27 21:05:00,709 INFO L125 PetriNetUnfolderBase]: For 495308/495331 co-relation queries the response was YES. [2024-06-27 21:05:00,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91793 conditions, 10773 events. 6791/10773 cut-off events. For 495308/495331 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 72146 event pairs, 2271 based on Foata normal form. 60/10830 useless extension candidates. Maximal degree in co-relation 91658. Up to 8959 conditions per place. [2024-06-27 21:05:00,856 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 378 selfloop transitions, 170 changer transitions 0/551 dead transitions. [2024-06-27 21:05:00,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 551 transitions, 12667 flow [2024-06-27 21:05:00,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:05:00,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:05:00,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 21:05:00,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4388888888888889 [2024-06-27 21:05:00,857 INFO L175 Difference]: Start difference. First operand has 276 places, 491 transitions, 10790 flow. Second operand 9 states and 158 transitions. [2024-06-27 21:05:00,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 551 transitions, 12667 flow [2024-06-27 21:05:02,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 551 transitions, 12207 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-27 21:05:02,278 INFO L231 Difference]: Finished difference. Result has 279 places, 506 transitions, 11266 flow [2024-06-27 21:05:02,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10370, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11266, PETRI_PLACES=279, PETRI_TRANSITIONS=506} [2024-06-27 21:05:02,279 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 238 predicate places. [2024-06-27 21:05:02,279 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 506 transitions, 11266 flow [2024-06-27 21:05:02,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:02,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:02,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:02,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 21:05:02,280 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:02,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:02,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1516624371, now seen corresponding path program 15 times [2024-06-27 21:05:02,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:02,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082894358] [2024-06-27 21:05:02,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:02,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:02,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:02,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:02,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:02,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082894358] [2024-06-27 21:05:02,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082894358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:02,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:02,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:05:02,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268207560] [2024-06-27 21:05:02,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:02,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:05:02,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:02,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:05:02,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:05:03,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:05:03,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 506 transitions, 11266 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:03,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:03,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:05:03,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:05,675 INFO L124 PetriNetUnfolderBase]: 7217/11477 cut-off events. [2024-06-27 21:05:05,675 INFO L125 PetriNetUnfolderBase]: For 563548/563577 co-relation queries the response was YES. [2024-06-27 21:05:05,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98904 conditions, 11477 events. 7217/11477 cut-off events. For 563548/563577 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 78109 event pairs, 2067 based on Foata normal form. 64/11538 useless extension candidates. Maximal degree in co-relation 98767. Up to 8660 conditions per place. [2024-06-27 21:05:05,823 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 355 selfloop transitions, 210 changer transitions 0/568 dead transitions. [2024-06-27 21:05:05,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 568 transitions, 13200 flow [2024-06-27 21:05:05,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:05:05,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:05:05,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 21:05:05,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-27 21:05:05,825 INFO L175 Difference]: Start difference. First operand has 279 places, 506 transitions, 11266 flow. Second operand 9 states and 168 transitions. [2024-06-27 21:05:05,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 568 transitions, 13200 flow [2024-06-27 21:05:07,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 568 transitions, 12902 flow, removed 75 selfloop flow, removed 4 redundant places. [2024-06-27 21:05:07,530 INFO L231 Difference]: Finished difference. Result has 285 places, 516 transitions, 11840 flow [2024-06-27 21:05:07,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10968, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11840, PETRI_PLACES=285, PETRI_TRANSITIONS=516} [2024-06-27 21:05:07,531 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 244 predicate places. [2024-06-27 21:05:07,531 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 516 transitions, 11840 flow [2024-06-27 21:05:07,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:07,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:07,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:07,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 21:05:07,532 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:07,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:07,532 INFO L85 PathProgramCache]: Analyzing trace with hash -2055738709, now seen corresponding path program 16 times [2024-06-27 21:05:07,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:07,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292338087] [2024-06-27 21:05:07,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:07,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:07,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:08,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:08,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:08,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292338087] [2024-06-27 21:05:08,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292338087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:08,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:08,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:05:08,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142125683] [2024-06-27 21:05:08,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:08,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:05:08,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:08,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:05:08,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:05:08,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:05:08,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 516 transitions, 11840 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:08,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:08,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:05:08,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:11,270 INFO L124 PetriNetUnfolderBase]: 7635/12145 cut-off events. [2024-06-27 21:05:11,270 INFO L125 PetriNetUnfolderBase]: For 606643/606672 co-relation queries the response was YES. [2024-06-27 21:05:11,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105851 conditions, 12145 events. 7635/12145 cut-off events. For 606643/606672 co-relation queries the response was YES. Maximal size of possible extension queue 755. Compared 83618 event pairs, 2574 based on Foata normal form. 74/12216 useless extension candidates. Maximal degree in co-relation 105711. Up to 10541 conditions per place. [2024-06-27 21:05:11,423 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 366 selfloop transitions, 215 changer transitions 0/584 dead transitions. [2024-06-27 21:05:11,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 584 transitions, 13971 flow [2024-06-27 21:05:11,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:05:11,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:05:11,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 21:05:11,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 21:05:11,425 INFO L175 Difference]: Start difference. First operand has 285 places, 516 transitions, 11840 flow. Second operand 9 states and 165 transitions. [2024-06-27 21:05:11,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 584 transitions, 13971 flow [2024-06-27 21:05:13,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 584 transitions, 13613 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-27 21:05:13,011 INFO L231 Difference]: Finished difference. Result has 288 places, 534 transitions, 12476 flow [2024-06-27 21:05:13,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11516, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12476, PETRI_PLACES=288, PETRI_TRANSITIONS=534} [2024-06-27 21:05:13,012 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 247 predicate places. [2024-06-27 21:05:13,012 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 534 transitions, 12476 flow [2024-06-27 21:05:13,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:13,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:13,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:13,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 21:05:13,013 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:13,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:13,013 INFO L85 PathProgramCache]: Analyzing trace with hash 452823377, now seen corresponding path program 3 times [2024-06-27 21:05:13,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:13,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391247391] [2024-06-27 21:05:13,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:13,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:13,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:13,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:13,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:13,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391247391] [2024-06-27 21:05:13,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391247391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:13,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:13,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:05:13,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413361593] [2024-06-27 21:05:13,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:13,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:05:13,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:13,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:05:13,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:05:13,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:05:13,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 534 transitions, 12476 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:13,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:13,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:05:13,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:16,885 INFO L124 PetriNetUnfolderBase]: 7696/12259 cut-off events. [2024-06-27 21:05:16,885 INFO L125 PetriNetUnfolderBase]: For 565164/565187 co-relation queries the response was YES. [2024-06-27 21:05:16,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106767 conditions, 12259 events. 7696/12259 cut-off events. For 565164/565187 co-relation queries the response was YES. Maximal size of possible extension queue 775. Compared 84862 event pairs, 2799 based on Foata normal form. 32/12288 useless extension candidates. Maximal degree in co-relation 106626. Up to 11440 conditions per place. [2024-06-27 21:05:17,048 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 440 selfloop transitions, 131 changer transitions 0/574 dead transitions. [2024-06-27 21:05:17,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 574 transitions, 14029 flow [2024-06-27 21:05:17,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:05:17,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:05:17,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 21:05:17,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-27 21:05:17,050 INFO L175 Difference]: Start difference. First operand has 288 places, 534 transitions, 12476 flow. Second operand 8 states and 135 transitions. [2024-06-27 21:05:17,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 574 transitions, 14029 flow [2024-06-27 21:05:18,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 574 transitions, 13528 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 21:05:18,923 INFO L231 Difference]: Finished difference. Result has 290 places, 540 transitions, 12484 flow [2024-06-27 21:05:18,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11975, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12484, PETRI_PLACES=290, PETRI_TRANSITIONS=540} [2024-06-27 21:05:18,924 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 249 predicate places. [2024-06-27 21:05:18,924 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 540 transitions, 12484 flow [2024-06-27 21:05:18,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:18,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:18,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:18,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 21:05:18,924 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:18,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:18,925 INFO L85 PathProgramCache]: Analyzing trace with hash -2055588607, now seen corresponding path program 4 times [2024-06-27 21:05:18,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:18,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141350053] [2024-06-27 21:05:18,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:18,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:18,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:19,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:19,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:19,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141350053] [2024-06-27 21:05:19,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141350053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:19,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:19,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:05:19,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47243962] [2024-06-27 21:05:19,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:19,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:05:19,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:19,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:05:19,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:05:19,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:05:19,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 540 transitions, 12484 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:19,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:19,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:05:19,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:22,898 INFO L124 PetriNetUnfolderBase]: 7741/12305 cut-off events. [2024-06-27 21:05:22,899 INFO L125 PetriNetUnfolderBase]: For 574378/574393 co-relation queries the response was YES. [2024-06-27 21:05:23,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107110 conditions, 12305 events. 7741/12305 cut-off events. For 574378/574393 co-relation queries the response was YES. Maximal size of possible extension queue 772. Compared 84873 event pairs, 2782 based on Foata normal form. 24/12326 useless extension candidates. Maximal degree in co-relation 106968. Up to 11511 conditions per place. [2024-06-27 21:05:23,088 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 440 selfloop transitions, 138 changer transitions 0/581 dead transitions. [2024-06-27 21:05:23,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 581 transitions, 14023 flow [2024-06-27 21:05:23,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:05:23,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:05:23,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 21:05:23,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-27 21:05:23,089 INFO L175 Difference]: Start difference. First operand has 290 places, 540 transitions, 12484 flow. Second operand 8 states and 139 transitions. [2024-06-27 21:05:23,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 581 transitions, 14023 flow [2024-06-27 21:05:25,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 581 transitions, 13667 flow, removed 66 selfloop flow, removed 5 redundant places. [2024-06-27 21:05:25,094 INFO L231 Difference]: Finished difference. Result has 293 places, 545 transitions, 12615 flow [2024-06-27 21:05:25,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12128, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12615, PETRI_PLACES=293, PETRI_TRANSITIONS=545} [2024-06-27 21:05:25,095 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 252 predicate places. [2024-06-27 21:05:25,095 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 545 transitions, 12615 flow [2024-06-27 21:05:25,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:25,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:25,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:25,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 21:05:25,096 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:25,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:25,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1516772241, now seen corresponding path program 17 times [2024-06-27 21:05:25,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:25,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653895268] [2024-06-27 21:05:25,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:25,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:25,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:25,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:25,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:25,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653895268] [2024-06-27 21:05:25,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653895268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:25,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:25,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:05:25,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805752882] [2024-06-27 21:05:25,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:25,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:05:25,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:25,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:05:25,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:05:25,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:05:25,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 545 transitions, 12615 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:25,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:25,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:05:25,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:29,107 INFO L124 PetriNetUnfolderBase]: 7963/12679 cut-off events. [2024-06-27 21:05:29,107 INFO L125 PetriNetUnfolderBase]: For 645320/645335 co-relation queries the response was YES. [2024-06-27 21:05:29,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110600 conditions, 12679 events. 7963/12679 cut-off events. For 645320/645335 co-relation queries the response was YES. Maximal size of possible extension queue 801. Compared 88295 event pairs, 2849 based on Foata normal form. 62/12738 useless extension candidates. Maximal degree in co-relation 110457. Up to 11254 conditions per place. [2024-06-27 21:05:29,296 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 438 selfloop transitions, 154 changer transitions 0/595 dead transitions. [2024-06-27 21:05:29,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 595 transitions, 14236 flow [2024-06-27 21:05:29,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:05:29,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:05:29,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 21:05:29,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4388888888888889 [2024-06-27 21:05:29,298 INFO L175 Difference]: Start difference. First operand has 293 places, 545 transitions, 12615 flow. Second operand 9 states and 158 transitions. [2024-06-27 21:05:29,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 595 transitions, 14236 flow [2024-06-27 21:05:31,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 595 transitions, 13850 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-27 21:05:31,520 INFO L231 Difference]: Finished difference. Result has 296 places, 549 transitions, 12748 flow [2024-06-27 21:05:31,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12229, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12748, PETRI_PLACES=296, PETRI_TRANSITIONS=549} [2024-06-27 21:05:31,521 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 255 predicate places. [2024-06-27 21:05:31,521 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 549 transitions, 12748 flow [2024-06-27 21:05:31,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:31,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:31,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:31,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 21:05:31,522 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:31,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:31,522 INFO L85 PathProgramCache]: Analyzing trace with hash 452830817, now seen corresponding path program 5 times [2024-06-27 21:05:31,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:31,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065213135] [2024-06-27 21:05:31,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:31,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:31,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:32,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:32,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:32,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065213135] [2024-06-27 21:05:32,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065213135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:32,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:32,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:05:32,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378580681] [2024-06-27 21:05:32,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:32,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:05:32,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:32,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:05:32,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:05:32,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:05:32,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 549 transitions, 12748 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:32,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:32,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:05:32,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand