./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe030_power.oepc_pso.oepc_rmo.oepc.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/safe030_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe030_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/safe030_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 17:57:46,834 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 17:57:46,889 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 17:57:46,892 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 17:57:46,893 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 17:57:46,906 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 17:57:46,906 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 17:57:46,906 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 17:57:46,907 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 17:57:46,907 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 17:57:46,907 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 17:57:46,908 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 17:57:46,908 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 17:57:46,908 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 17:57:46,909 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 17:57:46,909 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 17:57:46,909 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 17:57:46,910 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 17:57:46,910 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 17:57:46,910 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 17:57:46,910 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 17:57:46,911 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 17:57:46,911 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 17:57:46,911 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 17:57:46,912 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 17:57:46,912 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 17:57:46,912 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 17:57:46,913 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 17:57:46,913 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 17:57:46,913 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 17:57:46,913 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 17:57:46,914 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 17:57:46,914 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:57:46,914 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 17:57:46,915 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 17:57:46,915 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 17:57:46,915 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 17:57:46,915 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 17:57:46,916 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 17:57:46,916 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 17:57:46,916 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 17:57:46,916 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 17:57:46,917 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 17:57:46,917 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 17:57:47,100 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 17:57:47,124 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 17:57:47,127 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 17:57:47,128 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 17:57:47,129 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 17:57:47,130 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe030_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 17:57:48,208 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 17:57:48,423 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 17:57:48,424 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe030_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 17:57:48,450 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b47837522/0c822de5a338402093f4b96ae52c9bc6/FLAG2cd008370 [2024-06-21 17:57:48,462 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b47837522/0c822de5a338402093f4b96ae52c9bc6 [2024-06-21 17:57:48,464 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 17:57:48,464 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 17:57:48,466 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe030_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-21 17:57:48,578 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 17:57:48,579 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 17:57:48,580 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 17:57:48,580 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 17:57:48,584 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 17:57:48,585 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:57:48" (1/2) ... [2024-06-21 17:57:48,585 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16aad398 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:57:48, skipping insertion in model container [2024-06-21 17:57:48,585 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:57:48" (1/2) ... [2024-06-21 17:57:48,586 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3a3757a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:57:48, skipping insertion in model container [2024-06-21 17:57:48,587 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:57:48" (2/2) ... [2024-06-21 17:57:48,587 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16aad398 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:57:48, skipping insertion in model container [2024-06-21 17:57:48,587 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:57:48" (2/2) ... [2024-06-21 17:57:48,587 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 17:57:48,654 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 17:57:48,655 INFO L97 edCorrectnessWitness]: Location invariant before [L819-L819] (((((((((((((((! multithreaded || z$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 2))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 2))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((z == 0 || z == 1) || z == 2)) [2024-06-21 17:57:48,656 INFO L97 edCorrectnessWitness]: Location invariant before [L821-L821] (((((((((((((((! multithreaded || z$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 2))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 2))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((z == 0 || z == 1) || z == 2)) [2024-06-21 17:57:48,656 INFO L97 edCorrectnessWitness]: Location invariant before [L822-L822] (((((((((((((((! multithreaded || z$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 2))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 2))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((z == 0 || z == 1) || z == 2)) [2024-06-21 17:57:48,656 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 17:57:48,656 INFO L106 edCorrectnessWitness]: ghost_update [L817-L817] multithreaded = 1; [2024-06-21 17:57:48,696 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 17:57:49,015 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:57:49,022 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 17:57:49,128 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:57:49,154 INFO L206 MainTranslator]: Completed translation [2024-06-21 17:57:49,155 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:57:49 WrapperNode [2024-06-21 17:57:49,155 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 17:57:49,155 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 17:57:49,156 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 17:57:49,156 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 17:57:49,161 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:57:49" (1/1) ... [2024-06-21 17:57:49,171 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:57:49" (1/1) ... [2024-06-21 17:57:49,194 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 142 [2024-06-21 17:57:49,194 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 17:57:49,195 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 17:57:49,195 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 17:57:49,195 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 17:57:49,203 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:57:49" (1/1) ... [2024-06-21 17:57:49,203 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:57:49" (1/1) ... [2024-06-21 17:57:49,206 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:57:49" (1/1) ... [2024-06-21 17:57:49,217 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 17:57:49,218 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:57:49" (1/1) ... [2024-06-21 17:57:49,218 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:57:49" (1/1) ... [2024-06-21 17:57:49,224 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:57:49" (1/1) ... [2024-06-21 17:57:49,226 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:57:49" (1/1) ... [2024-06-21 17:57:49,227 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:57:49" (1/1) ... [2024-06-21 17:57:49,228 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:57:49" (1/1) ... [2024-06-21 17:57:49,230 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 17:57:49,231 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 17:57:49,231 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 17:57:49,231 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 17:57:49,253 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:57:49" (1/1) ... [2024-06-21 17:57:49,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:57:49,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 17:57:49,315 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 17:57:49,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 17:57:49,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 17:57:49,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 17:57:49,375 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 17:57:49,376 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 17:57:49,376 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 17:57:49,376 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 17:57:49,376 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 17:57:49,376 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 17:57:49,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 17:57:49,377 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 17:57:49,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 17:57:49,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 17:57:49,378 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 17:57:49,482 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 17:57:49,484 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 17:57:49,772 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 17:57:49,773 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 17:57:49,869 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 17:57:49,869 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 17:57:49,869 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:57:49 BoogieIcfgContainer [2024-06-21 17:57:49,870 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 17:57:49,871 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 17:57:49,871 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 17:57:49,873 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 17:57:49,874 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 05:57:48" (1/4) ... [2024-06-21 17:57:49,874 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d4ea66e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:57:49, skipping insertion in model container [2024-06-21 17:57:49,874 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:57:48" (2/4) ... [2024-06-21 17:57:49,874 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d4ea66e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:57:49, skipping insertion in model container [2024-06-21 17:57:49,875 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:57:49" (3/4) ... [2024-06-21 17:57:49,875 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d4ea66e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:57:49, skipping insertion in model container [2024-06-21 17:57:49,875 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:57:49" (4/4) ... [2024-06-21 17:57:49,876 INFO L112 eAbstractionObserver]: Analyzing ICFG safe030_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 17:57:49,888 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 17:57:49,888 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 17:57:49,888 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 17:57:49,917 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 17:57:49,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 17:57:49,957 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-21 17:57:49,957 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:57:49,958 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 59 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 17:57:49,958 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 17:57:49,960 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-21 17:57:49,966 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 17:57:49,971 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;@383f34de, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 17:57:49,971 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 17:57:49,993 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 17:57:49,993 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 17:57:49,994 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:57:49,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:49,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 17:57:49,995 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:57:49,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:49,999 INFO L85 PathProgramCache]: Analyzing trace with hash 367698528, now seen corresponding path program 1 times [2024-06-21 17:57:50,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:50,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613652225] [2024-06-21 17:57:50,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:50,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:50,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:50,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:50,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:50,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613652225] [2024-06-21 17:57:50,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613652225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:50,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:50,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 17:57:50,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822229268] [2024-06-21 17:57:50,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:50,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 17:57:50,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:50,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 17:57:50,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 17:57:50,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:57:50,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:50,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:50,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:57:50,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:51,079 INFO L124 PetriNetUnfolderBase]: 1659/2477 cut-off events. [2024-06-21 17:57:51,079 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-21 17:57:51,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5041 conditions, 2477 events. 1659/2477 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11214 event pairs, 1184 based on Foata normal form. 1/2437 useless extension candidates. Maximal degree in co-relation 5029. Up to 2465 conditions per place. [2024-06-21 17:57:51,097 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 33 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-21 17:57:51,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 171 flow [2024-06-21 17:57:51,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 17:57:51,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 17:57:51,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-06-21 17:57:51,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-21 17:57:51,109 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 67 transitions. [2024-06-21 17:57:51,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 171 flow [2024-06-21 17:57:51,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 17:57:51,114 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-21 17:57:51,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-21 17:57:51,118 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-21 17:57:51,118 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-21 17:57:51,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:51,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:51,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:51,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 17:57:51,119 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:57:51,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:51,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1170999743, now seen corresponding path program 1 times [2024-06-21 17:57:51,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:51,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114151141] [2024-06-21 17:57:51,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:51,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:51,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:51,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:51,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:51,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114151141] [2024-06-21 17:57:51,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114151141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:51,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:51,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 17:57:51,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445466444] [2024-06-21 17:57:51,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:51,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 17:57:51,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:51,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 17:57:51,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 17:57:51,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:57:51,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:51,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:51,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:57:51,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:51,880 INFO L124 PetriNetUnfolderBase]: 1653/2468 cut-off events. [2024-06-21 17:57:51,880 INFO L125 PetriNetUnfolderBase]: For 458/458 co-relation queries the response was YES. [2024-06-21 17:57:51,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5657 conditions, 2468 events. 1653/2468 cut-off events. For 458/458 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11186 event pairs, 1038 based on Foata normal form. 3/2470 useless extension candidates. Maximal degree in co-relation 5645. Up to 2441 conditions per place. [2024-06-21 17:57:51,892 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 40 selfloop transitions, 7 changer transitions 0/51 dead transitions. [2024-06-21 17:57:51,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 238 flow [2024-06-21 17:57:51,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 17:57:51,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 17:57:51,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2024-06-21 17:57:51,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-21 17:57:51,896 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 86 transitions. [2024-06-21 17:57:51,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 238 flow [2024-06-21 17:57:51,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 51 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 17:57:51,898 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 134 flow [2024-06-21 17:57:51,899 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} [2024-06-21 17:57:51,899 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2024-06-21 17:57:51,899 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 134 flow [2024-06-21 17:57:51,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:51,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:51,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:51,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 17:57:51,902 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:57:51,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:51,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1941254745, now seen corresponding path program 1 times [2024-06-21 17:57:51,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:51,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314008070] [2024-06-21 17:57:51,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:51,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:51,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:52,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:52,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:52,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314008070] [2024-06-21 17:57:52,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314008070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:52,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:52,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 17:57:52,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934756259] [2024-06-21 17:57:52,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:52,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 17:57:52,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:52,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 17:57:52,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 17:57:52,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:57:52,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:52,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:52,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:57:52,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:52,596 INFO L124 PetriNetUnfolderBase]: 1661/2481 cut-off events. [2024-06-21 17:57:52,597 INFO L125 PetriNetUnfolderBase]: For 1306/1306 co-relation queries the response was YES. [2024-06-21 17:57:52,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6307 conditions, 2481 events. 1661/2481 cut-off events. For 1306/1306 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11214 event pairs, 812 based on Foata normal form. 5/2485 useless extension candidates. Maximal degree in co-relation 6293. Up to 2387 conditions per place. [2024-06-21 17:57:52,606 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 53 selfloop transitions, 16 changer transitions 0/73 dead transitions. [2024-06-21 17:57:52,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 73 transitions, 392 flow [2024-06-21 17:57:52,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:57:52,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:57:52,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-06-21 17:57:52,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565 [2024-06-21 17:57:52,607 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 134 flow. Second operand 5 states and 113 transitions. [2024-06-21 17:57:52,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 73 transitions, 392 flow [2024-06-21 17:57:52,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 73 transitions, 378 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 17:57:52,610 INFO L231 Difference]: Finished difference. Result has 49 places, 48 transitions, 233 flow [2024-06-21 17:57:52,610 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} [2024-06-21 17:57:52,610 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2024-06-21 17:57:52,611 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 48 transitions, 233 flow [2024-06-21 17:57:52,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:52,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:52,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:52,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 17:57:52,611 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:57:52,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:52,612 INFO L85 PathProgramCache]: Analyzing trace with hash 187884212, now seen corresponding path program 1 times [2024-06-21 17:57:52,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:52,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941831585] [2024-06-21 17:57:52,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:52,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:52,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:53,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:53,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:53,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941831585] [2024-06-21 17:57:53,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941831585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:53,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:53,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:57:53,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338957541] [2024-06-21 17:57:53,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:53,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:57:53,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:53,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:57:53,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:57:53,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:57:53,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 48 transitions, 233 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:53,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:53,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:57:53,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:53,588 INFO L124 PetriNetUnfolderBase]: 1669/2493 cut-off events. [2024-06-21 17:57:53,588 INFO L125 PetriNetUnfolderBase]: For 3034/3036 co-relation queries the response was YES. [2024-06-21 17:57:53,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7426 conditions, 2493 events. 1669/2493 cut-off events. For 3034/3036 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11279 event pairs, 666 based on Foata normal form. 7/2499 useless extension candidates. Maximal degree in co-relation 7409. Up to 2373 conditions per place. [2024-06-21 17:57:53,598 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 60 selfloop transitions, 20 changer transitions 0/84 dead transitions. [2024-06-21 17:57:53,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 84 transitions, 519 flow [2024-06-21 17:57:53,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:57:53,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:57:53,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-21 17:57:53,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5541666666666667 [2024-06-21 17:57:53,600 INFO L175 Difference]: Start difference. First operand has 49 places, 48 transitions, 233 flow. Second operand 6 states and 133 transitions. [2024-06-21 17:57:53,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 84 transitions, 519 flow [2024-06-21 17:57:53,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 84 transitions, 511 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-21 17:57:53,604 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 306 flow [2024-06-21 17:57:53,604 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=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=306, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2024-06-21 17:57:53,604 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 14 predicate places. [2024-06-21 17:57:53,605 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 306 flow [2024-06-21 17:57:53,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:53,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:53,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:53,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 17:57:53,605 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)] === [2024-06-21 17:57:53,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:53,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1530039064, now seen corresponding path program 1 times [2024-06-21 17:57:53,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:53,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749124017] [2024-06-21 17:57:53,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:53,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:53,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:54,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:54,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:54,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749124017] [2024-06-21 17:57:54,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749124017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:54,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:54,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:57:54,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148990068] [2024-06-21 17:57:54,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:54,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:57:54,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:54,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:57:54,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:57:54,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:57:54,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 306 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:54,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:54,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:57:54,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:54,537 INFO L124 PetriNetUnfolderBase]: 1681/2513 cut-off events. [2024-06-21 17:57:54,537 INFO L125 PetriNetUnfolderBase]: For 4782/4784 co-relation queries the response was YES. [2024-06-21 17:57:54,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8297 conditions, 2513 events. 1681/2513 cut-off events. For 4782/4784 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11388 event pairs, 502 based on Foata normal form. 12/2524 useless extension candidates. Maximal degree in co-relation 8277. Up to 2341 conditions per place. [2024-06-21 17:57:54,549 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 64 selfloop transitions, 23 changer transitions 0/91 dead transitions. [2024-06-21 17:57:54,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 91 transitions, 620 flow [2024-06-21 17:57:54,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:57:54,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:57:54,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-21 17:57:54,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5321428571428571 [2024-06-21 17:57:54,550 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 306 flow. Second operand 7 states and 149 transitions. [2024-06-21 17:57:54,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 91 transitions, 620 flow [2024-06-21 17:57:54,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 91 transitions, 571 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 17:57:54,554 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 333 flow [2024-06-21 17:57:54,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=333, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2024-06-21 17:57:54,555 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2024-06-21 17:57:54,555 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 333 flow [2024-06-21 17:57:54,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:54,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:54,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:54,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 17:57:54,556 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:57:54,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:54,556 INFO L85 PathProgramCache]: Analyzing trace with hash 945572823, now seen corresponding path program 1 times [2024-06-21 17:57:54,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:54,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516421361] [2024-06-21 17:57:54,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:54,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:54,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:54,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:54,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:54,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516421361] [2024-06-21 17:57:54,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516421361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:54,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:54,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:57:54,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631700842] [2024-06-21 17:57:54,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:54,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:57:54,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:54,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:57:54,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:57:54,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:57:54,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 333 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:54,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:54,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:57:54,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:55,350 INFO L124 PetriNetUnfolderBase]: 1676/2505 cut-off events. [2024-06-21 17:57:55,350 INFO L125 PetriNetUnfolderBase]: For 6458/6458 co-relation queries the response was YES. [2024-06-21 17:57:55,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8823 conditions, 2505 events. 1676/2505 cut-off events. For 6458/6458 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11316 event pairs, 659 based on Foata normal form. 2/2506 useless extension candidates. Maximal degree in co-relation 8801. Up to 2484 conditions per place. [2024-06-21 17:57:55,362 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 54 selfloop transitions, 8 changer transitions 0/65 dead transitions. [2024-06-21 17:57:55,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 65 transitions, 485 flow [2024-06-21 17:57:55,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:57:55,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:57:55,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2024-06-21 17:57:55,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.405 [2024-06-21 17:57:55,364 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 333 flow. Second operand 5 states and 81 transitions. [2024-06-21 17:57:55,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 65 transitions, 485 flow [2024-06-21 17:57:55,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 65 transitions, 421 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 17:57:55,368 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 293 flow [2024-06-21 17:57:55,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=293, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2024-06-21 17:57:55,369 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2024-06-21 17:57:55,369 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 293 flow [2024-06-21 17:57:55,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:55,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:55,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:55,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 17:57:55,370 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:57:55,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:55,370 INFO L85 PathProgramCache]: Analyzing trace with hash -752531503, now seen corresponding path program 1 times [2024-06-21 17:57:55,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:55,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212339150] [2024-06-21 17:57:55,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:55,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:55,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:55,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:55,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:55,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212339150] [2024-06-21 17:57:55,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212339150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:55,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:55,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:57:55,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848683938] [2024-06-21 17:57:55,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:55,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:57:55,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:55,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:57:55,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:57:55,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:57:55,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 293 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:55,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:55,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:57:55,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:56,194 INFO L124 PetriNetUnfolderBase]: 1680/2511 cut-off events. [2024-06-21 17:57:56,194 INFO L125 PetriNetUnfolderBase]: For 7537/7537 co-relation queries the response was YES. [2024-06-21 17:57:56,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8825 conditions, 2511 events. 1680/2511 cut-off events. For 7537/7537 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11306 event pairs, 617 based on Foata normal form. 6/2516 useless extension candidates. Maximal degree in co-relation 8801. Up to 2442 conditions per place. [2024-06-21 17:57:56,205 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 64 selfloop transitions, 17 changer transitions 0/84 dead transitions. [2024-06-21 17:57:56,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 84 transitions, 585 flow [2024-06-21 17:57:56,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:57:56,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:57:56,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-21 17:57:56,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42916666666666664 [2024-06-21 17:57:56,206 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 293 flow. Second operand 6 states and 103 transitions. [2024-06-21 17:57:56,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 84 transitions, 585 flow [2024-06-21 17:57:56,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 84 transitions, 563 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 17:57:56,211 INFO L231 Difference]: Finished difference. Result has 61 places, 65 transitions, 402 flow [2024-06-21 17:57:56,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=402, PETRI_PLACES=61, PETRI_TRANSITIONS=65} [2024-06-21 17:57:56,211 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 20 predicate places. [2024-06-21 17:57:56,211 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 65 transitions, 402 flow [2024-06-21 17:57:56,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:56,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:56,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:56,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 17:57:56,212 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:57:56,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:56,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1964610644, now seen corresponding path program 1 times [2024-06-21 17:57:56,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:56,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349748899] [2024-06-21 17:57:56,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:56,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:56,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:56,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:56,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:56,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349748899] [2024-06-21 17:57:56,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349748899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:56,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:56,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:57:56,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445931814] [2024-06-21 17:57:56,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:56,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:57:56,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:56,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:57:56,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:57:56,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:57:56,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 65 transitions, 402 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:56,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:56,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:57:56,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:56,967 INFO L124 PetriNetUnfolderBase]: 1686/2521 cut-off events. [2024-06-21 17:57:56,967 INFO L125 PetriNetUnfolderBase]: For 10563/10567 co-relation queries the response was YES. [2024-06-21 17:57:56,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9820 conditions, 2521 events. 1686/2521 cut-off events. For 10563/10567 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11325 event pairs, 636 based on Foata normal form. 8/2528 useless extension candidates. Maximal degree in co-relation 9794. Up to 2424 conditions per place. [2024-06-21 17:57:56,978 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 66 selfloop transitions, 19 changer transitions 0/88 dead transitions. [2024-06-21 17:57:56,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 88 transitions, 672 flow [2024-06-21 17:57:56,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:57:56,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:57:56,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-21 17:57:56,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-21 17:57:56,979 INFO L175 Difference]: Start difference. First operand has 61 places, 65 transitions, 402 flow. Second operand 6 states and 104 transitions. [2024-06-21 17:57:56,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 88 transitions, 672 flow [2024-06-21 17:57:56,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 88 transitions, 654 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-21 17:57:56,987 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 456 flow [2024-06-21 17:57:56,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=456, PETRI_PLACES=66, PETRI_TRANSITIONS=68} [2024-06-21 17:57:56,988 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 25 predicate places. [2024-06-21 17:57:56,988 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 456 flow [2024-06-21 17:57:56,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:56,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:56,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:56,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 17:57:56,989 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:57:56,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:56,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1837242752, now seen corresponding path program 2 times [2024-06-21 17:57:56,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:56,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270628487] [2024-06-21 17:57:56,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:56,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:56,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:57,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:57,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:57,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270628487] [2024-06-21 17:57:57,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270628487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:57,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:57,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:57:57,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747191794] [2024-06-21 17:57:57,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:57,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:57:57,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:57,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:57:57,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:57:57,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:57:57,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 68 transitions, 456 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:57,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:57,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:57:57,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:57,731 INFO L124 PetriNetUnfolderBase]: 1671/2495 cut-off events. [2024-06-21 17:57:57,732 INFO L125 PetriNetUnfolderBase]: For 11830/11830 co-relation queries the response was YES. [2024-06-21 17:57:57,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9921 conditions, 2495 events. 1671/2495 cut-off events. For 11830/11830 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11118 event pairs, 632 based on Foata normal form. 2/2496 useless extension candidates. Maximal degree in co-relation 9892. Up to 2465 conditions per place. [2024-06-21 17:57:57,744 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 69 selfloop transitions, 11 changer transitions 0/83 dead transitions. [2024-06-21 17:57:57,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 83 transitions, 654 flow [2024-06-21 17:57:57,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:57:57,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:57:57,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-21 17:57:57,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 17:57:57,745 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 456 flow. Second operand 6 states and 95 transitions. [2024-06-21 17:57:57,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 83 transitions, 654 flow [2024-06-21 17:57:57,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 83 transitions, 625 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 17:57:57,755 INFO L231 Difference]: Finished difference. Result has 69 places, 68 transitions, 457 flow [2024-06-21 17:57:57,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=457, PETRI_PLACES=69, PETRI_TRANSITIONS=68} [2024-06-21 17:57:57,756 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 28 predicate places. [2024-06-21 17:57:57,756 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 68 transitions, 457 flow [2024-06-21 17:57:57,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:57,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:57,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:57,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 17:57:57,757 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:57:57,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:57,757 INFO L85 PathProgramCache]: Analyzing trace with hash 773388816, now seen corresponding path program 1 times [2024-06-21 17:57:57,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:57,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968933656] [2024-06-21 17:57:57,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:57,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:57,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:58,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:58,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:58,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968933656] [2024-06-21 17:57:58,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968933656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:58,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:58,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:57:58,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503602194] [2024-06-21 17:57:58,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:58,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:57:58,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:58,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:57:58,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:57:58,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:57:58,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 68 transitions, 457 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:58,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:58,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:57:58,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:58,671 INFO L124 PetriNetUnfolderBase]: 1839/2735 cut-off events. [2024-06-21 17:57:58,671 INFO L125 PetriNetUnfolderBase]: For 14800/14800 co-relation queries the response was YES. [2024-06-21 17:57:58,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11018 conditions, 2735 events. 1839/2735 cut-off events. For 14800/14800 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12390 event pairs, 549 based on Foata normal form. 12/2746 useless extension candidates. Maximal degree in co-relation 10988. Up to 2361 conditions per place. [2024-06-21 17:57:58,683 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 86 selfloop transitions, 31 changer transitions 0/120 dead transitions. [2024-06-21 17:57:58,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 120 transitions, 981 flow [2024-06-21 17:57:58,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:57:58,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:57:58,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 17:57:58,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46785714285714286 [2024-06-21 17:57:58,685 INFO L175 Difference]: Start difference. First operand has 69 places, 68 transitions, 457 flow. Second operand 7 states and 131 transitions. [2024-06-21 17:57:58,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 120 transitions, 981 flow [2024-06-21 17:57:58,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 120 transitions, 934 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 17:57:58,699 INFO L231 Difference]: Finished difference. Result has 73 places, 87 transitions, 658 flow [2024-06-21 17:57:58,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=658, PETRI_PLACES=73, PETRI_TRANSITIONS=87} [2024-06-21 17:57:58,701 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 32 predicate places. [2024-06-21 17:57:58,702 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 87 transitions, 658 flow [2024-06-21 17:57:58,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:58,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:58,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:58,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 17:57:58,703 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:57:58,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:58,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1129780498, now seen corresponding path program 2 times [2024-06-21 17:57:58,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:58,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219491276] [2024-06-21 17:57:58,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:58,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:58,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:59,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:59,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:59,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219491276] [2024-06-21 17:57:59,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219491276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:59,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:59,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:57:59,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128282756] [2024-06-21 17:57:59,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:59,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:57:59,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:59,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:57:59,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:57:59,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:57:59,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 87 transitions, 658 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:59,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:59,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:57:59,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:59,645 INFO L124 PetriNetUnfolderBase]: 1875/2785 cut-off events. [2024-06-21 17:57:59,645 INFO L125 PetriNetUnfolderBase]: For 19841/19841 co-relation queries the response was YES. [2024-06-21 17:57:59,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12995 conditions, 2785 events. 1875/2785 cut-off events. For 19841/19841 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12564 event pairs, 591 based on Foata normal form. 6/2790 useless extension candidates. Maximal degree in co-relation 12961. Up to 2647 conditions per place. [2024-06-21 17:57:59,661 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 96 selfloop transitions, 23 changer transitions 0/122 dead transitions. [2024-06-21 17:57:59,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 122 transitions, 1138 flow [2024-06-21 17:57:59,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:57:59,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:57:59,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 17:57:59,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43214285714285716 [2024-06-21 17:57:59,663 INFO L175 Difference]: Start difference. First operand has 73 places, 87 transitions, 658 flow. Second operand 7 states and 121 transitions. [2024-06-21 17:57:59,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 122 transitions, 1138 flow [2024-06-21 17:57:59,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 122 transitions, 1094 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-21 17:57:59,680 INFO L231 Difference]: Finished difference. Result has 80 places, 95 transitions, 766 flow [2024-06-21 17:57:59,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=766, PETRI_PLACES=80, PETRI_TRANSITIONS=95} [2024-06-21 17:57:59,681 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 39 predicate places. [2024-06-21 17:57:59,681 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 95 transitions, 766 flow [2024-06-21 17:57:59,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:59,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:59,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:59,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 17:57:59,682 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:57:59,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:59,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1628244688, now seen corresponding path program 3 times [2024-06-21 17:57:59,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:59,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837431190] [2024-06-21 17:57:59,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:59,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:59,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:00,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:00,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:00,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837431190] [2024-06-21 17:58:00,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837431190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:00,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:00,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:58:00,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132104910] [2024-06-21 17:58:00,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:00,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:58:00,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:00,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:58:00,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:58:00,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:00,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 95 transitions, 766 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:00,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:00,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:00,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:00,684 INFO L124 PetriNetUnfolderBase]: 1879/2791 cut-off events. [2024-06-21 17:58:00,684 INFO L125 PetriNetUnfolderBase]: For 23702/23702 co-relation queries the response was YES. [2024-06-21 17:58:00,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13571 conditions, 2791 events. 1879/2791 cut-off events. For 23702/23702 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12609 event pairs, 585 based on Foata normal form. 6/2796 useless extension candidates. Maximal degree in co-relation 13533. Up to 2716 conditions per place. [2024-06-21 17:58:00,699 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 99 selfloop transitions, 21 changer transitions 0/123 dead transitions. [2024-06-21 17:58:00,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 123 transitions, 1166 flow [2024-06-21 17:58:00,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:58:00,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:58:00,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 17:58:00,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41785714285714287 [2024-06-21 17:58:00,701 INFO L175 Difference]: Start difference. First operand has 80 places, 95 transitions, 766 flow. Second operand 7 states and 117 transitions. [2024-06-21 17:58:00,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 123 transitions, 1166 flow [2024-06-21 17:58:00,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 123 transitions, 1117 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 17:58:00,722 INFO L231 Difference]: Finished difference. Result has 85 places, 101 transitions, 844 flow [2024-06-21 17:58:00,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=844, PETRI_PLACES=85, PETRI_TRANSITIONS=101} [2024-06-21 17:58:00,724 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 44 predicate places. [2024-06-21 17:58:00,724 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 101 transitions, 844 flow [2024-06-21 17:58:00,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:00,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:00,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:00,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 17:58:00,725 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:00,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:00,725 INFO L85 PathProgramCache]: Analyzing trace with hash 950766414, now seen corresponding path program 1 times [2024-06-21 17:58:00,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:00,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982172691] [2024-06-21 17:58:00,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:00,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:00,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:01,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:01,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:01,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982172691] [2024-06-21 17:58:01,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982172691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:01,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:01,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:01,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344139526] [2024-06-21 17:58:01,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:01,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:01,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:01,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:01,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:01,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:01,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 101 transitions, 844 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:01,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:01,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:01,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:02,085 INFO L124 PetriNetUnfolderBase]: 1882/2796 cut-off events. [2024-06-21 17:58:02,086 INFO L125 PetriNetUnfolderBase]: For 25921/25921 co-relation queries the response was YES. [2024-06-21 17:58:02,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13906 conditions, 2796 events. 1882/2796 cut-off events. For 25921/25921 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12644 event pairs, 567 based on Foata normal form. 6/2801 useless extension candidates. Maximal degree in co-relation 13866. Up to 2701 conditions per place. [2024-06-21 17:58:02,101 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 98 selfloop transitions, 25 changer transitions 0/126 dead transitions. [2024-06-21 17:58:02,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 126 transitions, 1224 flow [2024-06-21 17:58:02,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:58:02,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:58:02,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 17:58:02,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-21 17:58:02,102 INFO L175 Difference]: Start difference. First operand has 85 places, 101 transitions, 844 flow. Second operand 7 states and 118 transitions. [2024-06-21 17:58:02,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 126 transitions, 1224 flow [2024-06-21 17:58:02,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 126 transitions, 1171 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 17:58:02,123 INFO L231 Difference]: Finished difference. Result has 88 places, 104 transitions, 887 flow [2024-06-21 17:58:02,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=791, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=887, PETRI_PLACES=88, PETRI_TRANSITIONS=104} [2024-06-21 17:58:02,124 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 47 predicate places. [2024-06-21 17:58:02,124 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 104 transitions, 887 flow [2024-06-21 17:58:02,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:02,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:02,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:02,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 17:58:02,124 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:02,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:02,125 INFO L85 PathProgramCache]: Analyzing trace with hash 450339565, now seen corresponding path program 1 times [2024-06-21 17:58:02,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:02,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245027536] [2024-06-21 17:58:02,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:02,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:02,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:02,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:02,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:02,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245027536] [2024-06-21 17:58:02,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245027536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:02,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:02,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:58:02,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304448328] [2024-06-21 17:58:02,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:02,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:58:02,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:02,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:58:02,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:58:02,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:02,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 104 transitions, 887 flow. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:02,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:02,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:02,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:02,876 INFO L124 PetriNetUnfolderBase]: 1879/2792 cut-off events. [2024-06-21 17:58:02,876 INFO L125 PetriNetUnfolderBase]: For 28319/28319 co-relation queries the response was YES. [2024-06-21 17:58:02,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14297 conditions, 2792 events. 1879/2792 cut-off events. For 28319/28319 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12603 event pairs, 587 based on Foata normal form. 1/2792 useless extension candidates. Maximal degree in co-relation 14256. Up to 2777 conditions per place. [2024-06-21 17:58:02,893 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 101 selfloop transitions, 8 changer transitions 0/112 dead transitions. [2024-06-21 17:58:02,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 112 transitions, 1125 flow [2024-06-21 17:58:02,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:58:02,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:58:02,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2024-06-21 17:58:02,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.385 [2024-06-21 17:58:02,894 INFO L175 Difference]: Start difference. First operand has 88 places, 104 transitions, 887 flow. Second operand 5 states and 77 transitions. [2024-06-21 17:58:02,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 112 transitions, 1125 flow [2024-06-21 17:58:02,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 112 transitions, 1045 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 17:58:02,918 INFO L231 Difference]: Finished difference. Result has 88 places, 104 transitions, 829 flow [2024-06-21 17:58:02,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=829, PETRI_PLACES=88, PETRI_TRANSITIONS=104} [2024-06-21 17:58:02,919 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 47 predicate places. [2024-06-21 17:58:02,919 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 104 transitions, 829 flow [2024-06-21 17:58:02,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:02,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:02,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:02,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 17:58:02,920 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:02,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:02,920 INFO L85 PathProgramCache]: Analyzing trace with hash 2108162711, now seen corresponding path program 1 times [2024-06-21 17:58:02,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:02,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983344604] [2024-06-21 17:58:02,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:02,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:02,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:03,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:03,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:03,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983344604] [2024-06-21 17:58:03,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983344604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:03,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:03,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:58:03,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357381649] [2024-06-21 17:58:03,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:03,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:58:03,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:03,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:58:03,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:58:03,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:03,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 104 transitions, 829 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:03,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:03,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:03,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:03,929 INFO L124 PetriNetUnfolderBase]: 1890/2809 cut-off events. [2024-06-21 17:58:03,929 INFO L125 PetriNetUnfolderBase]: For 31105/31111 co-relation queries the response was YES. [2024-06-21 17:58:03,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14432 conditions, 2809 events. 1890/2809 cut-off events. For 31105/31111 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12716 event pairs, 573 based on Foata normal form. 8/2816 useless extension candidates. Maximal degree in co-relation 14390. Up to 2672 conditions per place. [2024-06-21 17:58:03,945 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 108 selfloop transitions, 26 changer transitions 0/137 dead transitions. [2024-06-21 17:58:03,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 137 transitions, 1299 flow [2024-06-21 17:58:03,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:58:03,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:58:03,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 17:58:03,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43214285714285716 [2024-06-21 17:58:03,973 INFO L175 Difference]: Start difference. First operand has 88 places, 104 transitions, 829 flow. Second operand 7 states and 121 transitions. [2024-06-21 17:58:03,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 137 transitions, 1299 flow [2024-06-21 17:58:03,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 137 transitions, 1275 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 17:58:04,003 INFO L231 Difference]: Finished difference. Result has 91 places, 110 transitions, 951 flow [2024-06-21 17:58:04,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=951, PETRI_PLACES=91, PETRI_TRANSITIONS=110} [2024-06-21 17:58:04,004 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 50 predicate places. [2024-06-21 17:58:04,004 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 110 transitions, 951 flow [2024-06-21 17:58:04,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:04,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:04,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:04,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 17:58:04,005 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:04,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:04,005 INFO L85 PathProgramCache]: Analyzing trace with hash 2108252921, now seen corresponding path program 2 times [2024-06-21 17:58:04,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:04,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568334752] [2024-06-21 17:58:04,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:04,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:04,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:04,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:04,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:04,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568334752] [2024-06-21 17:58:04,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568334752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:04,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:04,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:58:04,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853394919] [2024-06-21 17:58:04,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:04,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:58:04,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:04,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:58:04,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:58:04,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:04,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 110 transitions, 951 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:04,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:04,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:04,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:04,977 INFO L124 PetriNetUnfolderBase]: 1885/2802 cut-off events. [2024-06-21 17:58:04,977 INFO L125 PetriNetUnfolderBase]: For 35230/35236 co-relation queries the response was YES. [2024-06-21 17:58:04,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14990 conditions, 2802 events. 1885/2802 cut-off events. For 35230/35236 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12684 event pairs, 578 based on Foata normal form. 8/2809 useless extension candidates. Maximal degree in co-relation 14948. Up to 2700 conditions per place. [2024-06-21 17:58:04,994 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 107 selfloop transitions, 22 changer transitions 0/132 dead transitions. [2024-06-21 17:58:04,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 132 transitions, 1265 flow [2024-06-21 17:58:04,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:58:04,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:58:04,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 17:58:04,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-21 17:58:04,996 INFO L175 Difference]: Start difference. First operand has 91 places, 110 transitions, 951 flow. Second operand 7 states and 116 transitions. [2024-06-21 17:58:04,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 132 transitions, 1265 flow [2024-06-21 17:58:05,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 132 transitions, 1184 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-21 17:58:05,032 INFO L231 Difference]: Finished difference. Result has 95 places, 110 transitions, 922 flow [2024-06-21 17:58:05,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=870, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=922, PETRI_PLACES=95, PETRI_TRANSITIONS=110} [2024-06-21 17:58:05,033 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 54 predicate places. [2024-06-21 17:58:05,033 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 110 transitions, 922 flow [2024-06-21 17:58:05,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:05,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:05,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:05,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 17:58:05,034 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:05,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:05,034 INFO L85 PathProgramCache]: Analyzing trace with hash 2111977726, now seen corresponding path program 1 times [2024-06-21 17:58:05,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:05,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612539832] [2024-06-21 17:58:05,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:05,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:05,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:05,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:05,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:05,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612539832] [2024-06-21 17:58:05,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612539832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:05,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:05,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:58:05,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547653855] [2024-06-21 17:58:05,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:05,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:58:05,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:05,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:58:05,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:58:05,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:05,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 110 transitions, 922 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:05,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:05,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:05,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:05,988 INFO L124 PetriNetUnfolderBase]: 1969/2923 cut-off events. [2024-06-21 17:58:05,989 INFO L125 PetriNetUnfolderBase]: For 40366/40368 co-relation queries the response was YES. [2024-06-21 17:58:05,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15892 conditions, 2923 events. 1969/2923 cut-off events. For 40366/40368 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 13309 event pairs, 540 based on Foata normal form. 8/2930 useless extension candidates. Maximal degree in co-relation 15848. Up to 2461 conditions per place. [2024-06-21 17:58:06,007 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 101 selfloop transitions, 47 changer transitions 0/151 dead transitions. [2024-06-21 17:58:06,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 151 transitions, 1594 flow [2024-06-21 17:58:06,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:58:06,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:58:06,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 17:58:06,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 17:58:06,009 INFO L175 Difference]: Start difference. First operand has 95 places, 110 transitions, 922 flow. Second operand 7 states and 130 transitions. [2024-06-21 17:58:06,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 151 transitions, 1594 flow [2024-06-21 17:58:06,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 151 transitions, 1539 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 17:58:06,053 INFO L231 Difference]: Finished difference. Result has 98 places, 119 transitions, 1129 flow [2024-06-21 17:58:06,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=867, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1129, PETRI_PLACES=98, PETRI_TRANSITIONS=119} [2024-06-21 17:58:06,054 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 57 predicate places. [2024-06-21 17:58:06,054 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 119 transitions, 1129 flow [2024-06-21 17:58:06,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:06,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:06,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:06,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 17:58:06,055 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:06,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:06,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1794755250, now seen corresponding path program 2 times [2024-06-21 17:58:06,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:06,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890347957] [2024-06-21 17:58:06,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:06,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:06,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:06,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:06,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:06,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890347957] [2024-06-21 17:58:06,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890347957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:06,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:06,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:58:06,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76107421] [2024-06-21 17:58:06,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:06,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:58:06,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:06,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:58:06,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:58:06,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:06,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 119 transitions, 1129 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:06,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:06,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:06,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:06,948 INFO L124 PetriNetUnfolderBase]: 1957/2907 cut-off events. [2024-06-21 17:58:06,948 INFO L125 PetriNetUnfolderBase]: For 45917/45919 co-relation queries the response was YES. [2024-06-21 17:58:06,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16772 conditions, 2907 events. 1957/2907 cut-off events. For 45917/45919 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 13243 event pairs, 540 based on Foata normal form. 8/2914 useless extension candidates. Maximal degree in co-relation 16725. Up to 2455 conditions per place. [2024-06-21 17:58:06,966 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 102 selfloop transitions, 50 changer transitions 0/155 dead transitions. [2024-06-21 17:58:06,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 155 transitions, 1717 flow [2024-06-21 17:58:06,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:58:06,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:58:06,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 17:58:06,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-21 17:58:06,967 INFO L175 Difference]: Start difference. First operand has 98 places, 119 transitions, 1129 flow. Second operand 7 states and 133 transitions. [2024-06-21 17:58:06,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 155 transitions, 1717 flow [2024-06-21 17:58:07,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 155 transitions, 1622 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-21 17:58:07,013 INFO L231 Difference]: Finished difference. Result has 104 places, 122 transitions, 1237 flow [2024-06-21 17:58:07,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1035, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1237, PETRI_PLACES=104, PETRI_TRANSITIONS=122} [2024-06-21 17:58:07,013 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 63 predicate places. [2024-06-21 17:58:07,013 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 122 transitions, 1237 flow [2024-06-21 17:58:07,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:07,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:07,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:07,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 17:58:07,014 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:07,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:07,014 INFO L85 PathProgramCache]: Analyzing trace with hash -663254450, now seen corresponding path program 3 times [2024-06-21 17:58:07,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:07,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328967111] [2024-06-21 17:58:07,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:07,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:07,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:07,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:07,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:07,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328967111] [2024-06-21 17:58:07,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328967111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:07,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:07,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:58:07,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516167080] [2024-06-21 17:58:07,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:07,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:58:07,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:07,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:58:07,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:58:07,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:07,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 122 transitions, 1237 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:07,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:07,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:07,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:07,914 INFO L124 PetriNetUnfolderBase]: 1961/2912 cut-off events. [2024-06-21 17:58:07,914 INFO L125 PetriNetUnfolderBase]: For 50184/50190 co-relation queries the response was YES. [2024-06-21 17:58:07,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17346 conditions, 2912 events. 1961/2912 cut-off events. For 50184/50190 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 13195 event pairs, 576 based on Foata normal form. 12/2923 useless extension candidates. Maximal degree in co-relation 17296. Up to 2804 conditions per place. [2024-06-21 17:58:07,933 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 122 selfloop transitions, 23 changer transitions 0/148 dead transitions. [2024-06-21 17:58:07,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 148 transitions, 1685 flow [2024-06-21 17:58:07,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:58:07,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:58:07,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 17:58:07,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-21 17:58:07,934 INFO L175 Difference]: Start difference. First operand has 104 places, 122 transitions, 1237 flow. Second operand 7 states and 118 transitions. [2024-06-21 17:58:07,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 148 transitions, 1685 flow [2024-06-21 17:58:07,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 148 transitions, 1585 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 17:58:07,980 INFO L231 Difference]: Finished difference. Result has 106 places, 126 transitions, 1264 flow [2024-06-21 17:58:07,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1144, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1264, PETRI_PLACES=106, PETRI_TRANSITIONS=126} [2024-06-21 17:58:07,981 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 65 predicate places. [2024-06-21 17:58:07,981 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 126 transitions, 1264 flow [2024-06-21 17:58:07,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:07,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:07,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:07,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 17:58:07,982 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:07,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:07,982 INFO L85 PathProgramCache]: Analyzing trace with hash -656096953, now seen corresponding path program 1 times [2024-06-21 17:58:07,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:07,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895686251] [2024-06-21 17:58:07,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:07,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:07,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:08,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:08,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:08,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895686251] [2024-06-21 17:58:08,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895686251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:08,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:08,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:08,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832700226] [2024-06-21 17:58:08,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:08,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:08,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:08,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:08,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:08,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:08,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 126 transitions, 1264 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:08,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:08,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:08,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:09,117 INFO L124 PetriNetUnfolderBase]: 1963/2914 cut-off events. [2024-06-21 17:58:09,117 INFO L125 PetriNetUnfolderBase]: For 52823/52823 co-relation queries the response was YES. [2024-06-21 17:58:09,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17261 conditions, 2914 events. 1963/2914 cut-off events. For 52823/52823 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13286 event pairs, 563 based on Foata normal form. 3/2916 useless extension candidates. Maximal degree in co-relation 17211. Up to 2808 conditions per place. [2024-06-21 17:58:09,132 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 118 selfloop transitions, 30 changer transitions 0/151 dead transitions. [2024-06-21 17:58:09,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 151 transitions, 1708 flow [2024-06-21 17:58:09,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:58:09,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:58:09,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 17:58:09,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-21 17:58:09,134 INFO L175 Difference]: Start difference. First operand has 106 places, 126 transitions, 1264 flow. Second operand 7 states and 118 transitions. [2024-06-21 17:58:09,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 151 transitions, 1708 flow [2024-06-21 17:58:09,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 151 transitions, 1639 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 17:58:09,176 INFO L231 Difference]: Finished difference. Result has 108 places, 130 transitions, 1333 flow [2024-06-21 17:58:09,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1195, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1333, PETRI_PLACES=108, PETRI_TRANSITIONS=130} [2024-06-21 17:58:09,176 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 67 predicate places. [2024-06-21 17:58:09,176 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 130 transitions, 1333 flow [2024-06-21 17:58:09,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:09,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:09,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:09,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 17:58:09,177 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:09,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:09,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1075626349, now seen corresponding path program 1 times [2024-06-21 17:58:09,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:09,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545381986] [2024-06-21 17:58:09,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:09,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:09,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:09,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:09,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:09,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545381986] [2024-06-21 17:58:09,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545381986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:09,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:09,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:58:09,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519997183] [2024-06-21 17:58:09,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:09,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:58:09,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:09,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:58:09,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:58:09,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:09,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 130 transitions, 1333 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:09,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:09,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:09,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:10,068 INFO L124 PetriNetUnfolderBase]: 1957/2906 cut-off events. [2024-06-21 17:58:10,069 INFO L125 PetriNetUnfolderBase]: For 56297/56297 co-relation queries the response was YES. [2024-06-21 17:58:10,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17772 conditions, 2906 events. 1957/2906 cut-off events. For 56297/56297 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13119 event pairs, 573 based on Foata normal form. 2/2907 useless extension candidates. Maximal degree in co-relation 17721. Up to 2885 conditions per place. [2024-06-21 17:58:10,085 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 129 selfloop transitions, 11 changer transitions 0/143 dead transitions. [2024-06-21 17:58:10,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 143 transitions, 1663 flow [2024-06-21 17:58:10,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:58:10,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:58:10,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 89 transitions. [2024-06-21 17:58:10,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37083333333333335 [2024-06-21 17:58:10,086 INFO L175 Difference]: Start difference. First operand has 108 places, 130 transitions, 1333 flow. Second operand 6 states and 89 transitions. [2024-06-21 17:58:10,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 143 transitions, 1663 flow [2024-06-21 17:58:10,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 143 transitions, 1575 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 17:58:10,138 INFO L231 Difference]: Finished difference. Result has 109 places, 133 transitions, 1305 flow [2024-06-21 17:58:10,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1245, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1305, PETRI_PLACES=109, PETRI_TRANSITIONS=133} [2024-06-21 17:58:10,139 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 68 predicate places. [2024-06-21 17:58:10,139 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 133 transitions, 1305 flow [2024-06-21 17:58:10,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:10,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:10,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:10,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 17:58:10,139 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:10,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:10,140 INFO L85 PathProgramCache]: Analyzing trace with hash 928475023, now seen corresponding path program 1 times [2024-06-21 17:58:10,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:10,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173120617] [2024-06-21 17:58:10,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:10,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:10,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:10,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:10,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:10,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173120617] [2024-06-21 17:58:10,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173120617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:10,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:10,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:10,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028622481] [2024-06-21 17:58:10,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:10,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:10,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:10,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:10,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:10,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:10,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 133 transitions, 1305 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:10,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:10,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:10,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:11,185 INFO L124 PetriNetUnfolderBase]: 1974/2934 cut-off events. [2024-06-21 17:58:11,185 INFO L125 PetriNetUnfolderBase]: For 61252/61258 co-relation queries the response was YES. [2024-06-21 17:58:11,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18269 conditions, 2934 events. 1974/2934 cut-off events. For 61252/61258 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13365 event pairs, 418 based on Foata normal form. 10/2943 useless extension candidates. Maximal degree in co-relation 18217. Up to 2699 conditions per place. [2024-06-21 17:58:11,203 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 135 selfloop transitions, 32 changer transitions 0/170 dead transitions. [2024-06-21 17:58:11,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 170 transitions, 1897 flow [2024-06-21 17:58:11,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:11,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:11,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 17:58:11,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 17:58:11,205 INFO L175 Difference]: Start difference. First operand has 109 places, 133 transitions, 1305 flow. Second operand 8 states and 136 transitions. [2024-06-21 17:58:11,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 170 transitions, 1897 flow [2024-06-21 17:58:11,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 170 transitions, 1859 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 17:58:11,253 INFO L231 Difference]: Finished difference. Result has 113 places, 137 transitions, 1438 flow [2024-06-21 17:58:11,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1267, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1438, PETRI_PLACES=113, PETRI_TRANSITIONS=137} [2024-06-21 17:58:11,254 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 72 predicate places. [2024-06-21 17:58:11,254 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 137 transitions, 1438 flow [2024-06-21 17:58:11,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:11,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:11,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:11,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 17:58:11,255 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:11,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:11,255 INFO L85 PathProgramCache]: Analyzing trace with hash 79070485, now seen corresponding path program 2 times [2024-06-21 17:58:11,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:11,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787672001] [2024-06-21 17:58:11,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:11,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:11,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:11,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:11,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:11,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787672001] [2024-06-21 17:58:11,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787672001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:11,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:11,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:11,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110552425] [2024-06-21 17:58:11,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:11,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:11,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:11,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:11,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:11,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:11,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 137 transitions, 1438 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:11,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:11,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:11,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:12,362 INFO L124 PetriNetUnfolderBase]: 1991/2961 cut-off events. [2024-06-21 17:58:12,363 INFO L125 PetriNetUnfolderBase]: For 67762/67768 co-relation queries the response was YES. [2024-06-21 17:58:12,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18952 conditions, 2961 events. 1991/2961 cut-off events. For 67762/67768 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13514 event pairs, 541 based on Foata normal form. 10/2970 useless extension candidates. Maximal degree in co-relation 18899. Up to 2808 conditions per place. [2024-06-21 17:58:12,382 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 138 selfloop transitions, 28 changer transitions 0/169 dead transitions. [2024-06-21 17:58:12,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 169 transitions, 1898 flow [2024-06-21 17:58:12,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:12,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:12,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 17:58:12,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-21 17:58:12,384 INFO L175 Difference]: Start difference. First operand has 113 places, 137 transitions, 1438 flow. Second operand 8 states and 133 transitions. [2024-06-21 17:58:12,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 169 transitions, 1898 flow [2024-06-21 17:58:12,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 169 transitions, 1792 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-21 17:58:12,440 INFO L231 Difference]: Finished difference. Result has 117 places, 139 transitions, 1451 flow [2024-06-21 17:58:12,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1348, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1451, PETRI_PLACES=117, PETRI_TRANSITIONS=139} [2024-06-21 17:58:12,440 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 76 predicate places. [2024-06-21 17:58:12,441 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 139 transitions, 1451 flow [2024-06-21 17:58:12,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:12,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:12,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:12,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 17:58:12,441 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:12,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:12,442 INFO L85 PathProgramCache]: Analyzing trace with hash 928535597, now seen corresponding path program 1 times [2024-06-21 17:58:12,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:12,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779289903] [2024-06-21 17:58:12,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:12,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:12,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:12,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:12,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:12,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779289903] [2024-06-21 17:58:12,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779289903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:12,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:12,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:12,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860998232] [2024-06-21 17:58:12,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:12,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:12,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:12,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:12,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:13,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:13,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 139 transitions, 1451 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:13,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:13,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:13,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:13,518 INFO L124 PetriNetUnfolderBase]: 2159/3197 cut-off events. [2024-06-21 17:58:13,518 INFO L125 PetriNetUnfolderBase]: For 77742/77744 co-relation queries the response was YES. [2024-06-21 17:58:13,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20350 conditions, 3197 events. 2159/3197 cut-off events. For 77742/77744 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 14761 event pairs, 491 based on Foata normal form. 10/3206 useless extension candidates. Maximal degree in co-relation 20295. Up to 2062 conditions per place. [2024-06-21 17:58:13,541 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 153 selfloop transitions, 57 changer transitions 0/213 dead transitions. [2024-06-21 17:58:13,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 213 transitions, 2613 flow [2024-06-21 17:58:13,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:13,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:13,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-21 17:58:13,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.509375 [2024-06-21 17:58:13,543 INFO L175 Difference]: Start difference. First operand has 117 places, 139 transitions, 1451 flow. Second operand 8 states and 163 transitions. [2024-06-21 17:58:13,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 213 transitions, 2613 flow [2024-06-21 17:58:13,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 213 transitions, 2532 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 17:58:13,649 INFO L231 Difference]: Finished difference. Result has 123 places, 161 transitions, 1791 flow [2024-06-21 17:58:13,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1370, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1791, PETRI_PLACES=123, PETRI_TRANSITIONS=161} [2024-06-21 17:58:13,650 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 82 predicate places. [2024-06-21 17:58:13,650 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 161 transitions, 1791 flow [2024-06-21 17:58:13,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:13,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:13,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:13,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 17:58:13,650 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:13,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:13,651 INFO L85 PathProgramCache]: Analyzing trace with hash 931336757, now seen corresponding path program 2 times [2024-06-21 17:58:13,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:13,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096106249] [2024-06-21 17:58:13,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:13,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:13,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:14,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:14,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:14,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096106249] [2024-06-21 17:58:14,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096106249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:14,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:14,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:14,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097532039] [2024-06-21 17:58:14,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:14,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:14,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:14,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:14,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:14,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:14,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 161 transitions, 1791 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:14,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:14,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:14,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:14,918 INFO L124 PetriNetUnfolderBase]: 2383/3509 cut-off events. [2024-06-21 17:58:14,919 INFO L125 PetriNetUnfolderBase]: For 95301/95303 co-relation queries the response was YES. [2024-06-21 17:58:14,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24257 conditions, 3509 events. 2383/3509 cut-off events. For 95301/95303 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 16383 event pairs, 520 based on Foata normal form. 10/3518 useless extension candidates. Maximal degree in co-relation 24197. Up to 2511 conditions per place. [2024-06-21 17:58:14,944 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 156 selfloop transitions, 62 changer transitions 0/221 dead transitions. [2024-06-21 17:58:14,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 221 transitions, 2859 flow [2024-06-21 17:58:14,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:14,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:14,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 17:58:14,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.496875 [2024-06-21 17:58:14,949 INFO L175 Difference]: Start difference. First operand has 123 places, 161 transitions, 1791 flow. Second operand 8 states and 159 transitions. [2024-06-21 17:58:14,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 221 transitions, 2859 flow [2024-06-21 17:58:15,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 221 transitions, 2761 flow, removed 48 selfloop flow, removed 1 redundant places. [2024-06-21 17:58:15,069 INFO L231 Difference]: Finished difference. Result has 133 places, 176 transitions, 2110 flow [2024-06-21 17:58:15,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1705, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2110, PETRI_PLACES=133, PETRI_TRANSITIONS=176} [2024-06-21 17:58:15,069 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 92 predicate places. [2024-06-21 17:58:15,069 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 176 transitions, 2110 flow [2024-06-21 17:58:15,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:15,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:15,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:15,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 17:58:15,070 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:15,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:15,070 INFO L85 PathProgramCache]: Analyzing trace with hash 804008075, now seen corresponding path program 3 times [2024-06-21 17:58:15,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:15,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447666572] [2024-06-21 17:58:15,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:15,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:15,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:15,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:15,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:15,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447666572] [2024-06-21 17:58:15,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447666572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:15,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:15,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:15,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692409731] [2024-06-21 17:58:15,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:15,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:15,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:15,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:15,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:15,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:15,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 176 transitions, 2110 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:15,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:15,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:15,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:16,436 INFO L124 PetriNetUnfolderBase]: 2375/3496 cut-off events. [2024-06-21 17:58:16,436 INFO L125 PetriNetUnfolderBase]: For 104575/104581 co-relation queries the response was YES. [2024-06-21 17:58:16,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25557 conditions, 3496 events. 2375/3496 cut-off events. For 104575/104581 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 16303 event pairs, 624 based on Foata normal form. 10/3505 useless extension candidates. Maximal degree in co-relation 25491. Up to 3376 conditions per place. [2024-06-21 17:58:16,464 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 176 selfloop transitions, 24 changer transitions 0/203 dead transitions. [2024-06-21 17:58:16,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 203 transitions, 2578 flow [2024-06-21 17:58:16,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:16,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:16,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 17:58:16,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-21 17:58:16,466 INFO L175 Difference]: Start difference. First operand has 133 places, 176 transitions, 2110 flow. Second operand 8 states and 130 transitions. [2024-06-21 17:58:16,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 203 transitions, 2578 flow [2024-06-21 17:58:16,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 203 transitions, 2437 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-21 17:58:16,600 INFO L231 Difference]: Finished difference. Result has 138 places, 176 transitions, 2024 flow [2024-06-21 17:58:16,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1969, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2024, PETRI_PLACES=138, PETRI_TRANSITIONS=176} [2024-06-21 17:58:16,601 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 97 predicate places. [2024-06-21 17:58:16,601 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 176 transitions, 2024 flow [2024-06-21 17:58:16,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:16,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:16,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:16,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 17:58:16,602 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:16,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:16,616 INFO L85 PathProgramCache]: Analyzing trace with hash 931332107, now seen corresponding path program 3 times [2024-06-21 17:58:16,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:16,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161449896] [2024-06-21 17:58:16,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:16,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:16,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:17,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:17,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:17,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161449896] [2024-06-21 17:58:17,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161449896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:17,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:17,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:17,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504885770] [2024-06-21 17:58:17,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:17,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:17,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:17,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:17,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:17,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:17,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 176 transitions, 2024 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:17,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:17,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:17,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:17,962 INFO L124 PetriNetUnfolderBase]: 2435/3582 cut-off events. [2024-06-21 17:58:17,962 INFO L125 PetriNetUnfolderBase]: For 110234/110236 co-relation queries the response was YES. [2024-06-21 17:58:17,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25771 conditions, 3582 events. 2435/3582 cut-off events. For 110234/110236 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 16866 event pairs, 510 based on Foata normal form. 8/3589 useless extension candidates. Maximal degree in co-relation 25704. Up to 3036 conditions per place. [2024-06-21 17:58:17,988 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 159 selfloop transitions, 63 changer transitions 0/225 dead transitions. [2024-06-21 17:58:17,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 225 transitions, 2916 flow [2024-06-21 17:58:17,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:58:17,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:58:17,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 17:58:17,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2024-06-21 17:58:17,990 INFO L175 Difference]: Start difference. First operand has 138 places, 176 transitions, 2024 flow. Second operand 9 states and 164 transitions. [2024-06-21 17:58:17,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 225 transitions, 2916 flow [2024-06-21 17:58:18,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 225 transitions, 2853 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 17:58:18,183 INFO L231 Difference]: Finished difference. Result has 141 places, 186 transitions, 2262 flow [2024-06-21 17:58:18,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1961, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2262, PETRI_PLACES=141, PETRI_TRANSITIONS=186} [2024-06-21 17:58:18,184 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 100 predicate places. [2024-06-21 17:58:18,184 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 186 transitions, 2262 flow [2024-06-21 17:58:18,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:18,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:18,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:18,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 17:58:18,185 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)] === [2024-06-21 17:58:18,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:18,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1046623277, now seen corresponding path program 4 times [2024-06-21 17:58:18,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:18,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186349850] [2024-06-21 17:58:18,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:18,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:18,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:18,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:18,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:18,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186349850] [2024-06-21 17:58:18,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186349850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:18,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:18,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:18,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746565630] [2024-06-21 17:58:18,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:18,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:18,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:18,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:18,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:18,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:18,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 186 transitions, 2262 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:18,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:18,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:18,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:19,502 INFO L124 PetriNetUnfolderBase]: 2495/3668 cut-off events. [2024-06-21 17:58:19,502 INFO L125 PetriNetUnfolderBase]: For 122120/122122 co-relation queries the response was YES. [2024-06-21 17:58:19,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27381 conditions, 3668 events. 2495/3668 cut-off events. For 122120/122122 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 17372 event pairs, 475 based on Foata normal form. 8/3675 useless extension candidates. Maximal degree in co-relation 27312. Up to 3065 conditions per place. [2024-06-21 17:58:19,531 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 174 selfloop transitions, 65 changer transitions 0/242 dead transitions. [2024-06-21 17:58:19,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 242 transitions, 3324 flow [2024-06-21 17:58:19,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:58:19,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:58:19,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 17:58:19,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-21 17:58:19,533 INFO L175 Difference]: Start difference. First operand has 141 places, 186 transitions, 2262 flow. Second operand 9 states and 171 transitions. [2024-06-21 17:58:19,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 242 transitions, 3324 flow [2024-06-21 17:58:19,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 242 transitions, 3203 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 17:58:19,682 INFO L231 Difference]: Finished difference. Result has 146 places, 195 transitions, 2463 flow [2024-06-21 17:58:19,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2141, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2463, PETRI_PLACES=146, PETRI_TRANSITIONS=195} [2024-06-21 17:58:19,687 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 105 predicate places. [2024-06-21 17:58:19,687 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 195 transitions, 2463 flow [2024-06-21 17:58:19,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:19,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:19,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:19,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 17:58:19,687 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:19,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:19,688 INFO L85 PathProgramCache]: Analyzing trace with hash 808661423, now seen corresponding path program 1 times [2024-06-21 17:58:19,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:19,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554983546] [2024-06-21 17:58:19,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:19,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:19,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:20,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:20,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:20,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554983546] [2024-06-21 17:58:20,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554983546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:20,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:20,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:58:20,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274814610] [2024-06-21 17:58:20,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:20,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:58:20,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:20,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:58:20,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:58:20,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:20,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 195 transitions, 2463 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:20,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:20,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:20,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:21,147 INFO L124 PetriNetUnfolderBase]: 2551/3756 cut-off events. [2024-06-21 17:58:21,147 INFO L125 PetriNetUnfolderBase]: For 135584/135586 co-relation queries the response was YES. [2024-06-21 17:58:21,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28817 conditions, 3756 events. 2551/3756 cut-off events. For 135584/135586 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17936 event pairs, 506 based on Foata normal form. 14/3769 useless extension candidates. Maximal degree in co-relation 28745. Up to 3255 conditions per place. [2024-06-21 17:58:21,183 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 176 selfloop transitions, 53 changer transitions 0/232 dead transitions. [2024-06-21 17:58:21,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 232 transitions, 3255 flow [2024-06-21 17:58:21,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:21,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:21,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 17:58:21,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45625 [2024-06-21 17:58:21,185 INFO L175 Difference]: Start difference. First operand has 146 places, 195 transitions, 2463 flow. Second operand 8 states and 146 transitions. [2024-06-21 17:58:21,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 232 transitions, 3255 flow [2024-06-21 17:58:21,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 232 transitions, 3128 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-21 17:58:21,377 INFO L231 Difference]: Finished difference. Result has 150 places, 199 transitions, 2539 flow [2024-06-21 17:58:21,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2336, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2539, PETRI_PLACES=150, PETRI_TRANSITIONS=199} [2024-06-21 17:58:21,378 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 109 predicate places. [2024-06-21 17:58:21,378 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 199 transitions, 2539 flow [2024-06-21 17:58:21,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:21,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:21,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:21,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 17:58:21,378 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:21,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:21,379 INFO L85 PathProgramCache]: Analyzing trace with hash 197335919, now seen corresponding path program 5 times [2024-06-21 17:58:21,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:21,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777314768] [2024-06-21 17:58:21,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:21,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:21,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:21,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:21,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:21,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777314768] [2024-06-21 17:58:21,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777314768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:21,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:21,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:21,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732238220] [2024-06-21 17:58:21,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:21,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:21,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:21,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:21,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:21,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:21,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 199 transitions, 2539 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:21,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:21,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:21,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:22,582 INFO L124 PetriNetUnfolderBase]: 2587/3808 cut-off events. [2024-06-21 17:58:22,583 INFO L125 PetriNetUnfolderBase]: For 141504/141506 co-relation queries the response was YES. [2024-06-21 17:58:22,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29937 conditions, 3808 events. 2587/3808 cut-off events. For 141504/141506 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 18205 event pairs, 474 based on Foata normal form. 8/3815 useless extension candidates. Maximal degree in co-relation 29863. Up to 3325 conditions per place. [2024-06-21 17:58:22,614 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 177 selfloop transitions, 55 changer transitions 0/235 dead transitions. [2024-06-21 17:58:22,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 235 transitions, 3289 flow [2024-06-21 17:58:22,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:22,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:22,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 17:58:22,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446875 [2024-06-21 17:58:22,616 INFO L175 Difference]: Start difference. First operand has 150 places, 199 transitions, 2539 flow. Second operand 8 states and 143 transitions. [2024-06-21 17:58:22,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 235 transitions, 3289 flow [2024-06-21 17:58:22,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 235 transitions, 3116 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-21 17:58:22,784 INFO L231 Difference]: Finished difference. Result has 152 places, 203 transitions, 2577 flow [2024-06-21 17:58:22,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2366, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2577, PETRI_PLACES=152, PETRI_TRANSITIONS=203} [2024-06-21 17:58:22,785 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 111 predicate places. [2024-06-21 17:58:22,785 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 203 transitions, 2577 flow [2024-06-21 17:58:22,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:22,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:22,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:22,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 17:58:22,786 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:22,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:22,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1060406134, now seen corresponding path program 1 times [2024-06-21 17:58:22,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:22,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716267974] [2024-06-21 17:58:22,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:22,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:22,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:23,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:23,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:23,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716267974] [2024-06-21 17:58:23,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716267974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:23,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:23,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:58:23,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553329703] [2024-06-21 17:58:23,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:23,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:58:23,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:23,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:58:23,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:58:23,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:23,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 203 transitions, 2577 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:23,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:23,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:23,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:23,700 INFO L124 PetriNetUnfolderBase]: 2592/3813 cut-off events. [2024-06-21 17:58:23,701 INFO L125 PetriNetUnfolderBase]: For 147432/147432 co-relation queries the response was YES. [2024-06-21 17:58:23,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30012 conditions, 3813 events. 2592/3813 cut-off events. For 147432/147432 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 18155 event pairs, 632 based on Foata normal form. 1/3813 useless extension candidates. Maximal degree in co-relation 29937. Up to 3776 conditions per place. [2024-06-21 17:58:23,739 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 203 selfloop transitions, 16 changer transitions 0/222 dead transitions. [2024-06-21 17:58:23,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 222 transitions, 3169 flow [2024-06-21 17:58:23,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:58:23,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:58:23,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-21 17:58:23,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4041666666666667 [2024-06-21 17:58:23,741 INFO L175 Difference]: Start difference. First operand has 152 places, 203 transitions, 2577 flow. Second operand 6 states and 97 transitions. [2024-06-21 17:58:23,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 222 transitions, 3169 flow [2024-06-21 17:58:23,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 222 transitions, 3004 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 17:58:23,932 INFO L231 Difference]: Finished difference. Result has 152 places, 206 transitions, 2504 flow [2024-06-21 17:58:23,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2414, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2504, PETRI_PLACES=152, PETRI_TRANSITIONS=206} [2024-06-21 17:58:23,933 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 111 predicate places. [2024-06-21 17:58:23,933 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 206 transitions, 2504 flow [2024-06-21 17:58:23,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:23,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:23,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:23,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 17:58:23,934 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:23,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:23,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1366742319, now seen corresponding path program 2 times [2024-06-21 17:58:23,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:23,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574708003] [2024-06-21 17:58:23,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:23,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:23,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:24,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:24,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:24,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574708003] [2024-06-21 17:58:24,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574708003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:24,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:24,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:58:24,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019698538] [2024-06-21 17:58:24,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:24,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:58:24,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:24,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:58:24,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:58:24,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:24,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 206 transitions, 2504 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:24,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:24,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:24,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:25,473 INFO L124 PetriNetUnfolderBase]: 2620/3857 cut-off events. [2024-06-21 17:58:25,474 INFO L125 PetriNetUnfolderBase]: For 156384/156384 co-relation queries the response was YES. [2024-06-21 17:58:25,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30092 conditions, 3857 events. 2620/3857 cut-off events. For 156384/156384 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 18419 event pairs, 624 based on Foata normal form. 6/3862 useless extension candidates. Maximal degree in co-relation 30016. Up to 3717 conditions per place. [2024-06-21 17:58:25,502 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 199 selfloop transitions, 33 changer transitions 0/235 dead transitions. [2024-06-21 17:58:25,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 235 transitions, 3176 flow [2024-06-21 17:58:25,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:25,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:25,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 17:58:25,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-21 17:58:25,503 INFO L175 Difference]: Start difference. First operand has 152 places, 206 transitions, 2504 flow. Second operand 8 states and 133 transitions. [2024-06-21 17:58:25,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 235 transitions, 3176 flow [2024-06-21 17:58:25,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 235 transitions, 3033 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 17:58:25,667 INFO L231 Difference]: Finished difference. Result has 154 places, 209 transitions, 2522 flow [2024-06-21 17:58:25,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2361, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2522, PETRI_PLACES=154, PETRI_TRANSITIONS=209} [2024-06-21 17:58:25,668 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 113 predicate places. [2024-06-21 17:58:25,668 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 209 transitions, 2522 flow [2024-06-21 17:58:25,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:25,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:25,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:25,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 17:58:25,669 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:25,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:25,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1366742567, now seen corresponding path program 1 times [2024-06-21 17:58:25,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:25,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856050913] [2024-06-21 17:58:25,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:25,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:25,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:26,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:26,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:26,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856050913] [2024-06-21 17:58:26,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856050913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:26,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:26,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:26,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819678047] [2024-06-21 17:58:26,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:26,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:26,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:26,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:26,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:26,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:26,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 209 transitions, 2522 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:26,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:26,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:26,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:27,033 INFO L124 PetriNetUnfolderBase]: 2622/3861 cut-off events. [2024-06-21 17:58:27,033 INFO L125 PetriNetUnfolderBase]: For 161801/161807 co-relation queries the response was YES. [2024-06-21 17:58:27,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30413 conditions, 3861 events. 2622/3861 cut-off events. For 161801/161807 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 18467 event pairs, 626 based on Foata normal form. 9/3869 useless extension candidates. Maximal degree in co-relation 30337. Up to 3707 conditions per place. [2024-06-21 17:58:27,071 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 196 selfloop transitions, 36 changer transitions 0/235 dead transitions. [2024-06-21 17:58:27,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 235 transitions, 3189 flow [2024-06-21 17:58:27,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:58:27,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:58:27,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 17:58:27,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 17:58:27,073 INFO L175 Difference]: Start difference. First operand has 154 places, 209 transitions, 2522 flow. Second operand 7 states and 120 transitions. [2024-06-21 17:58:27,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 235 transitions, 3189 flow [2024-06-21 17:58:27,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 235 transitions, 3050 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-21 17:58:27,298 INFO L231 Difference]: Finished difference. Result has 155 places, 213 transitions, 2558 flow [2024-06-21 17:58:27,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2383, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2558, PETRI_PLACES=155, PETRI_TRANSITIONS=213} [2024-06-21 17:58:27,298 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 114 predicate places. [2024-06-21 17:58:27,298 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 213 transitions, 2558 flow [2024-06-21 17:58:27,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:27,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:27,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:27,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 17:58:27,299 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)] === [2024-06-21 17:58:27,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:27,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1135594411, now seen corresponding path program 6 times [2024-06-21 17:58:27,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:27,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539243821] [2024-06-21 17:58:27,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:27,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:27,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:27,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:27,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:27,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539243821] [2024-06-21 17:58:27,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539243821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:27,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:27,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:27,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324417361] [2024-06-21 17:58:27,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:27,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:27,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:27,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:27,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:27,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:27,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 213 transitions, 2558 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:27,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:27,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:27,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:28,548 INFO L124 PetriNetUnfolderBase]: 2626/3867 cut-off events. [2024-06-21 17:58:28,549 INFO L125 PetriNetUnfolderBase]: For 166262/166268 co-relation queries the response was YES. [2024-06-21 17:58:28,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30328 conditions, 3867 events. 2626/3867 cut-off events. For 166262/166268 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 18457 event pairs, 624 based on Foata normal form. 12/3878 useless extension candidates. Maximal degree in co-relation 30251. Up to 3725 conditions per place. [2024-06-21 17:58:28,581 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 214 selfloop transitions, 27 changer transitions 0/244 dead transitions. [2024-06-21 17:58:28,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 244 transitions, 3274 flow [2024-06-21 17:58:28,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:28,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:28,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 17:58:28,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-21 17:58:28,582 INFO L175 Difference]: Start difference. First operand has 155 places, 213 transitions, 2558 flow. Second operand 8 states and 134 transitions. [2024-06-21 17:58:28,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 244 transitions, 3274 flow [2024-06-21 17:58:28,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 244 transitions, 3158 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 17:58:28,779 INFO L231 Difference]: Finished difference. Result has 158 places, 217 transitions, 2609 flow [2024-06-21 17:58:28,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2442, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2609, PETRI_PLACES=158, PETRI_TRANSITIONS=217} [2024-06-21 17:58:28,779 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 117 predicate places. [2024-06-21 17:58:28,779 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 217 transitions, 2609 flow [2024-06-21 17:58:28,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:28,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:28,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:28,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 17:58:28,780 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:28,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:28,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1144172235, now seen corresponding path program 3 times [2024-06-21 17:58:28,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:28,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916022150] [2024-06-21 17:58:28,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:28,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:28,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:29,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:29,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:29,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916022150] [2024-06-21 17:58:29,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916022150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:29,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:29,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:58:29,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974581273] [2024-06-21 17:58:29,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:29,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:58:29,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:29,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:58:29,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:58:29,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:29,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 217 transitions, 2609 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:29,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:29,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:29,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:30,131 INFO L124 PetriNetUnfolderBase]: 2654/3910 cut-off events. [2024-06-21 17:58:30,132 INFO L125 PetriNetUnfolderBase]: For 176807/176807 co-relation queries the response was YES. [2024-06-21 17:58:30,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30992 conditions, 3910 events. 2654/3910 cut-off events. For 176807/176807 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 18726 event pairs, 615 based on Foata normal form. 6/3915 useless extension candidates. Maximal degree in co-relation 30914. Up to 3783 conditions per place. [2024-06-21 17:58:30,168 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 215 selfloop transitions, 28 changer transitions 0/246 dead transitions. [2024-06-21 17:58:30,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 246 transitions, 3315 flow [2024-06-21 17:58:30,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:30,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:30,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 17:58:30,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-21 17:58:30,170 INFO L175 Difference]: Start difference. First operand has 158 places, 217 transitions, 2609 flow. Second operand 8 states and 132 transitions. [2024-06-21 17:58:30,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 246 transitions, 3315 flow [2024-06-21 17:58:30,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 246 transitions, 3196 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-21 17:58:30,383 INFO L231 Difference]: Finished difference. Result has 160 places, 220 transitions, 2648 flow [2024-06-21 17:58:30,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2490, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2648, PETRI_PLACES=160, PETRI_TRANSITIONS=220} [2024-06-21 17:58:30,383 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 119 predicate places. [2024-06-21 17:58:30,383 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 220 transitions, 2648 flow [2024-06-21 17:58:30,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:30,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:30,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:30,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 17:58:30,384 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:30,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:30,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1602917679, now seen corresponding path program 4 times [2024-06-21 17:58:30,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:30,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934392606] [2024-06-21 17:58:30,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:30,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:30,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:30,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:30,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:30,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934392606] [2024-06-21 17:58:30,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934392606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:30,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:30,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:58:30,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48319528] [2024-06-21 17:58:30,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:30,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:58:30,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:30,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:58:30,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:58:31,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:31,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 220 transitions, 2648 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:31,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:31,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:31,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:31,726 INFO L124 PetriNetUnfolderBase]: 2657/3915 cut-off events. [2024-06-21 17:58:31,726 INFO L125 PetriNetUnfolderBase]: For 183666/183666 co-relation queries the response was YES. [2024-06-21 17:58:31,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31147 conditions, 3915 events. 2657/3915 cut-off events. For 183666/183666 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 18752 event pairs, 621 based on Foata normal form. 6/3920 useless extension candidates. Maximal degree in co-relation 31068. Up to 3756 conditions per place. [2024-06-21 17:58:31,759 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 218 selfloop transitions, 30 changer transitions 0/251 dead transitions. [2024-06-21 17:58:31,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 251 transitions, 3450 flow [2024-06-21 17:58:31,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:31,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:31,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 17:58:31,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-21 17:58:31,760 INFO L175 Difference]: Start difference. First operand has 160 places, 220 transitions, 2648 flow. Second operand 8 states and 134 transitions. [2024-06-21 17:58:31,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 251 transitions, 3450 flow [2024-06-21 17:58:31,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 251 transitions, 3314 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-21 17:58:31,995 INFO L231 Difference]: Finished difference. Result has 162 places, 223 transitions, 2680 flow [2024-06-21 17:58:31,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2512, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2680, PETRI_PLACES=162, PETRI_TRANSITIONS=223} [2024-06-21 17:58:31,995 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 121 predicate places. [2024-06-21 17:58:31,996 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 223 transitions, 2680 flow [2024-06-21 17:58:31,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:31,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:31,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:31,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 17:58:31,996 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:31,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:31,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1015333684, now seen corresponding path program 2 times [2024-06-21 17:58:31,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:31,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607579458] [2024-06-21 17:58:31,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:31,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:32,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:32,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:32,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:32,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607579458] [2024-06-21 17:58:32,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607579458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:32,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:32,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:58:32,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14725439] [2024-06-21 17:58:32,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:32,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:58:32,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:32,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:58:32,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:58:32,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:32,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 223 transitions, 2680 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:32,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:32,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:32,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:33,075 INFO L124 PetriNetUnfolderBase]: 2654/3911 cut-off events. [2024-06-21 17:58:33,075 INFO L125 PetriNetUnfolderBase]: For 187647/187647 co-relation queries the response was YES. [2024-06-21 17:58:33,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31307 conditions, 3911 events. 2654/3911 cut-off events. For 187647/187647 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 18700 event pairs, 638 based on Foata normal form. 1/3911 useless extension candidates. Maximal degree in co-relation 31227. Up to 3893 conditions per place. [2024-06-21 17:58:33,111 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 218 selfloop transitions, 11 changer transitions 0/232 dead transitions. [2024-06-21 17:58:33,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 232 transitions, 3160 flow [2024-06-21 17:58:33,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:58:33,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:58:33,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 88 transitions. [2024-06-21 17:58:33,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-21 17:58:33,112 INFO L175 Difference]: Start difference. First operand has 162 places, 223 transitions, 2680 flow. Second operand 6 states and 88 transitions. [2024-06-21 17:58:33,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 232 transitions, 3160 flow [2024-06-21 17:58:33,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 232 transitions, 3006 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-21 17:58:33,317 INFO L231 Difference]: Finished difference. Result has 162 places, 223 transitions, 2554 flow [2024-06-21 17:58:33,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2526, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2554, PETRI_PLACES=162, PETRI_TRANSITIONS=223} [2024-06-21 17:58:33,317 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 121 predicate places. [2024-06-21 17:58:33,317 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 223 transitions, 2554 flow [2024-06-21 17:58:33,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:33,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:33,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:33,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 17:58:33,318 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:33,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:33,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1871663274, now seen corresponding path program 1 times [2024-06-21 17:58:33,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:33,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500932229] [2024-06-21 17:58:33,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:33,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:33,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:33,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:33,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:33,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500932229] [2024-06-21 17:58:33,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500932229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:33,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:33,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:58:33,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205572672] [2024-06-21 17:58:33,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:33,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:58:33,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:33,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:58:33,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:58:33,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:33,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 223 transitions, 2554 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:33,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:33,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:33,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:34,500 INFO L124 PetriNetUnfolderBase]: 2653/3910 cut-off events. [2024-06-21 17:58:34,500 INFO L125 PetriNetUnfolderBase]: For 191519/191519 co-relation queries the response was YES. [2024-06-21 17:58:34,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31012 conditions, 3910 events. 2653/3910 cut-off events. For 191519/191519 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 18741 event pairs, 636 based on Foata normal form. 3/3912 useless extension candidates. Maximal degree in co-relation 30931. Up to 3843 conditions per place. [2024-06-21 17:58:34,543 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 212 selfloop transitions, 24 changer transitions 0/239 dead transitions. [2024-06-21 17:58:34,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 239 transitions, 3180 flow [2024-06-21 17:58:34,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:58:34,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:58:34,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-21 17:58:34,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-21 17:58:34,544 INFO L175 Difference]: Start difference. First operand has 162 places, 223 transitions, 2554 flow. Second operand 6 states and 98 transitions. [2024-06-21 17:58:34,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 239 transitions, 3180 flow [2024-06-21 17:58:34,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 239 transitions, 3148 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 17:58:34,776 INFO L231 Difference]: Finished difference. Result has 163 places, 226 transitions, 2631 flow [2024-06-21 17:58:34,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2522, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2631, PETRI_PLACES=163, PETRI_TRANSITIONS=226} [2024-06-21 17:58:34,776 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 122 predicate places. [2024-06-21 17:58:34,776 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 226 transitions, 2631 flow [2024-06-21 17:58:34,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:34,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:34,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:34,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 17:58:34,777 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:34,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:34,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1014088042, now seen corresponding path program 2 times [2024-06-21 17:58:34,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:34,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609277930] [2024-06-21 17:58:34,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:34,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:34,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:35,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:35,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:35,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609277930] [2024-06-21 17:58:35,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609277930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:35,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:35,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:58:35,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778656635] [2024-06-21 17:58:35,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:35,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:58:35,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:35,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:58:35,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:58:35,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:35,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 226 transitions, 2631 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:35,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:35,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:35,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:35,843 INFO L124 PetriNetUnfolderBase]: 2621/3863 cut-off events. [2024-06-21 17:58:35,843 INFO L125 PetriNetUnfolderBase]: For 198012/198014 co-relation queries the response was YES. [2024-06-21 17:58:35,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30941 conditions, 3863 events. 2621/3863 cut-off events. For 198012/198014 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 18485 event pairs, 646 based on Foata normal form. 1/3863 useless extension candidates. Maximal degree in co-relation 30859. Up to 3797 conditions per place. [2024-06-21 17:58:35,893 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 207 selfloop transitions, 25 changer transitions 0/235 dead transitions. [2024-06-21 17:58:35,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 235 transitions, 3117 flow [2024-06-21 17:58:35,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:58:35,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:58:35,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-21 17:58:35,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 17:58:35,894 INFO L175 Difference]: Start difference. First operand has 163 places, 226 transitions, 2631 flow. Second operand 6 states and 95 transitions. [2024-06-21 17:58:35,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 235 transitions, 3117 flow [2024-06-21 17:58:36,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 235 transitions, 3057 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 17:58:36,199 INFO L231 Difference]: Finished difference. Result has 165 places, 226 transitions, 2627 flow [2024-06-21 17:58:36,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2571, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2627, PETRI_PLACES=165, PETRI_TRANSITIONS=226} [2024-06-21 17:58:36,200 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 124 predicate places. [2024-06-21 17:58:36,200 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 226 transitions, 2627 flow [2024-06-21 17:58:36,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:36,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:36,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:36,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 17:58:36,201 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)] === [2024-06-21 17:58:36,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:36,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1282044363, now seen corresponding path program 1 times [2024-06-21 17:58:36,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:36,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47411686] [2024-06-21 17:58:36,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:36,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:36,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:36,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:36,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:36,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47411686] [2024-06-21 17:58:36,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47411686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:36,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:36,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:58:36,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642003997] [2024-06-21 17:58:36,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:36,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:58:36,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:36,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:58:36,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:58:36,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:36,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 226 transitions, 2627 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:36,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:36,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:36,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:37,693 INFO L124 PetriNetUnfolderBase]: 2984/4440 cut-off events. [2024-06-21 17:58:37,693 INFO L125 PetriNetUnfolderBase]: For 258376/258378 co-relation queries the response was YES. [2024-06-21 17:58:37,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36466 conditions, 4440 events. 2984/4440 cut-off events. For 258376/258378 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 22352 event pairs, 422 based on Foata normal form. 26/4465 useless extension candidates. Maximal degree in co-relation 36383. Up to 2586 conditions per place. [2024-06-21 17:58:37,734 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 210 selfloop transitions, 83 changer transitions 0/296 dead transitions. [2024-06-21 17:58:37,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 296 transitions, 4074 flow [2024-06-21 17:58:37,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:58:37,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:58:37,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 17:58:37,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861111111111111 [2024-06-21 17:58:37,735 INFO L175 Difference]: Start difference. First operand has 165 places, 226 transitions, 2627 flow. Second operand 9 states and 175 transitions. [2024-06-21 17:58:37,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 296 transitions, 4074 flow [2024-06-21 17:58:37,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 296 transitions, 4002 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 17:58:37,981 INFO L231 Difference]: Finished difference. Result has 171 places, 236 transitions, 3008 flow [2024-06-21 17:58:37,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2555, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3008, PETRI_PLACES=171, PETRI_TRANSITIONS=236} [2024-06-21 17:58:37,981 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 130 predicate places. [2024-06-21 17:58:37,982 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 236 transitions, 3008 flow [2024-06-21 17:58:37,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:37,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:37,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:37,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 17:58:37,982 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:37,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:37,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1843781265, now seen corresponding path program 2 times [2024-06-21 17:58:37,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:37,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163040566] [2024-06-21 17:58:37,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:37,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:37,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:38,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:38,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:38,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163040566] [2024-06-21 17:58:38,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163040566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:38,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:38,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:58:38,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822588063] [2024-06-21 17:58:38,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:38,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:58:38,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:38,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:58:38,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:58:38,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:38,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 236 transitions, 3008 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:38,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:38,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:38,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:39,750 INFO L124 PetriNetUnfolderBase]: 3289/4927 cut-off events. [2024-06-21 17:58:39,750 INFO L125 PetriNetUnfolderBase]: For 313189/313191 co-relation queries the response was YES. [2024-06-21 17:58:39,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42980 conditions, 4927 events. 3289/4927 cut-off events. For 313189/313191 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 25734 event pairs, 706 based on Foata normal form. 26/4952 useless extension candidates. Maximal degree in co-relation 42894. Up to 3510 conditions per place. [2024-06-21 17:58:39,791 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 206 selfloop transitions, 91 changer transitions 0/300 dead transitions. [2024-06-21 17:58:39,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 300 transitions, 4472 flow [2024-06-21 17:58:39,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:58:39,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:58:39,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-21 17:58:39,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-06-21 17:58:39,792 INFO L175 Difference]: Start difference. First operand has 171 places, 236 transitions, 3008 flow. Second operand 10 states and 192 transitions. [2024-06-21 17:58:39,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 300 transitions, 4472 flow [2024-06-21 17:58:40,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 300 transitions, 4339 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-21 17:58:40,262 INFO L231 Difference]: Finished difference. Result has 179 places, 241 transitions, 3250 flow [2024-06-21 17:58:40,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2875, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3250, PETRI_PLACES=179, PETRI_TRANSITIONS=241} [2024-06-21 17:58:40,262 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 138 predicate places. [2024-06-21 17:58:40,263 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 241 transitions, 3250 flow [2024-06-21 17:58:40,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:40,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:40,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:40,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 17:58:40,263 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:40,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:40,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1843777545, now seen corresponding path program 3 times [2024-06-21 17:58:40,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:40,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845355268] [2024-06-21 17:58:40,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:40,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:40,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:40,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:40,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:40,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845355268] [2024-06-21 17:58:40,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845355268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:40,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:40,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:58:40,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269082122] [2024-06-21 17:58:40,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:40,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:58:40,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:40,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:58:40,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:58:40,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:40,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 241 transitions, 3250 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:40,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:40,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:40,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:41,993 INFO L124 PetriNetUnfolderBase]: 3601/5451 cut-off events. [2024-06-21 17:58:41,993 INFO L125 PetriNetUnfolderBase]: For 383298/383300 co-relation queries the response was YES. [2024-06-21 17:58:42,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46396 conditions, 5451 events. 3601/5451 cut-off events. For 383298/383300 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 29105 event pairs, 845 based on Foata normal form. 74/5524 useless extension candidates. Maximal degree in co-relation 46307. Up to 3523 conditions per place. [2024-06-21 17:58:42,040 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 205 selfloop transitions, 96 changer transitions 0/304 dead transitions. [2024-06-21 17:58:42,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 304 transitions, 4666 flow [2024-06-21 17:58:42,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:58:42,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:58:42,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-21 17:58:42,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5083333333333333 [2024-06-21 17:58:42,041 INFO L175 Difference]: Start difference. First operand has 179 places, 241 transitions, 3250 flow. Second operand 9 states and 183 transitions. [2024-06-21 17:58:42,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 304 transitions, 4666 flow [2024-06-21 17:58:42,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 304 transitions, 4457 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-21 17:58:42,474 INFO L231 Difference]: Finished difference. Result has 182 places, 243 transitions, 3334 flow [2024-06-21 17:58:42,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3041, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3334, PETRI_PLACES=182, PETRI_TRANSITIONS=243} [2024-06-21 17:58:42,475 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 141 predicate places. [2024-06-21 17:58:42,475 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 243 transitions, 3334 flow [2024-06-21 17:58:42,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:42,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:42,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:42,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 17:58:42,480 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:42,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:42,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1678556535, now seen corresponding path program 4 times [2024-06-21 17:58:42,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:42,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350571908] [2024-06-21 17:58:42,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:42,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:42,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:43,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:43,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:43,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350571908] [2024-06-21 17:58:43,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350571908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:43,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:43,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:58:43,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334312980] [2024-06-21 17:58:43,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:43,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:58:43,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:43,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:58:43,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:58:43,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:43,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 243 transitions, 3334 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:43,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:43,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:43,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:44,348 INFO L124 PetriNetUnfolderBase]: 3725/5655 cut-off events. [2024-06-21 17:58:44,348 INFO L125 PetriNetUnfolderBase]: For 358395/358397 co-relation queries the response was YES. [2024-06-21 17:58:44,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48525 conditions, 5655 events. 3725/5655 cut-off events. For 358395/358397 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 30780 event pairs, 961 based on Foata normal form. 32/5686 useless extension candidates. Maximal degree in co-relation 48434. Up to 4929 conditions per place. [2024-06-21 17:58:44,411 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 221 selfloop transitions, 62 changer transitions 0/286 dead transitions. [2024-06-21 17:58:44,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 286 transitions, 4280 flow [2024-06-21 17:58:44,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:58:44,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:58:44,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 17:58:44,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 17:58:44,413 INFO L175 Difference]: Start difference. First operand has 182 places, 243 transitions, 3334 flow. Second operand 9 states and 165 transitions. [2024-06-21 17:58:44,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 286 transitions, 4280 flow [2024-06-21 17:58:45,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 286 transitions, 4033 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-21 17:58:45,005 INFO L231 Difference]: Finished difference. Result has 184 places, 245 transitions, 3317 flow [2024-06-21 17:58:45,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3087, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3317, PETRI_PLACES=184, PETRI_TRANSITIONS=245} [2024-06-21 17:58:45,006 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 143 predicate places. [2024-06-21 17:58:45,006 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 245 transitions, 3317 flow [2024-06-21 17:58:45,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:45,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:45,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:45,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 17:58:45,007 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:45,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:45,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1757085735, now seen corresponding path program 5 times [2024-06-21 17:58:45,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:45,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898027033] [2024-06-21 17:58:45,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:45,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:45,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:45,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:45,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:45,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898027033] [2024-06-21 17:58:45,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898027033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:45,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:45,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:58:45,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474562408] [2024-06-21 17:58:45,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:45,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:58:45,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:45,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:58:45,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:58:45,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:45,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 245 transitions, 3317 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:45,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:45,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:45,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:46,852 INFO L124 PetriNetUnfolderBase]: 3738/5678 cut-off events. [2024-06-21 17:58:46,853 INFO L125 PetriNetUnfolderBase]: For 356678/356680 co-relation queries the response was YES. [2024-06-21 17:58:46,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47450 conditions, 5678 events. 3738/5678 cut-off events. For 356678/356680 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 30887 event pairs, 940 based on Foata normal form. 32/5709 useless extension candidates. Maximal degree in co-relation 47358. Up to 4711 conditions per place. [2024-06-21 17:58:46,913 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 217 selfloop transitions, 74 changer transitions 0/294 dead transitions. [2024-06-21 17:58:46,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 294 transitions, 4389 flow [2024-06-21 17:58:46,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:58:46,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:58:46,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-21 17:58:46,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4575 [2024-06-21 17:58:46,915 INFO L175 Difference]: Start difference. First operand has 184 places, 245 transitions, 3317 flow. Second operand 10 states and 183 transitions. [2024-06-21 17:58:46,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 294 transitions, 4389 flow [2024-06-21 17:58:47,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 294 transitions, 4216 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 17:58:47,482 INFO L231 Difference]: Finished difference. Result has 188 places, 247 transitions, 3406 flow [2024-06-21 17:58:47,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3144, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3406, PETRI_PLACES=188, PETRI_TRANSITIONS=247} [2024-06-21 17:58:47,483 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 147 predicate places. [2024-06-21 17:58:47,483 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 247 transitions, 3406 flow [2024-06-21 17:58:47,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:47,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:47,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:47,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 17:58:47,484 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:47,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:47,484 INFO L85 PathProgramCache]: Analyzing trace with hash 2009373434, now seen corresponding path program 1 times [2024-06-21 17:58:47,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:47,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090347386] [2024-06-21 17:58:47,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:47,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:47,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:47,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:47,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:47,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090347386] [2024-06-21 17:58:47,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090347386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:47,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:47,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:58:47,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307143845] [2024-06-21 17:58:47,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:47,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:58:47,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:47,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:58:47,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:58:47,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:47,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 247 transitions, 3406 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:47,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:47,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:47,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:48,780 INFO L124 PetriNetUnfolderBase]: 3758/5706 cut-off events. [2024-06-21 17:58:48,780 INFO L125 PetriNetUnfolderBase]: For 339442/339444 co-relation queries the response was YES. [2024-06-21 17:58:48,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47784 conditions, 5706 events. 3758/5706 cut-off events. For 339442/339444 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 31073 event pairs, 967 based on Foata normal form. 6/5711 useless extension candidates. Maximal degree in co-relation 47691. Up to 5250 conditions per place. [2024-06-21 17:58:48,838 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 213 selfloop transitions, 63 changer transitions 0/279 dead transitions. [2024-06-21 17:58:48,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 279 transitions, 4309 flow [2024-06-21 17:58:48,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:58:48,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:58:48,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 17:58:48,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-21 17:58:48,841 INFO L175 Difference]: Start difference. First operand has 188 places, 247 transitions, 3406 flow. Second operand 7 states and 128 transitions. [2024-06-21 17:58:48,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 279 transitions, 4309 flow [2024-06-21 17:58:49,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 279 transitions, 4091 flow, removed 37 selfloop flow, removed 8 redundant places. [2024-06-21 17:58:49,498 INFO L231 Difference]: Finished difference. Result has 187 places, 252 transitions, 3434 flow [2024-06-21 17:58:49,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3200, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3434, PETRI_PLACES=187, PETRI_TRANSITIONS=252} [2024-06-21 17:58:49,499 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 146 predicate places. [2024-06-21 17:58:49,499 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 252 transitions, 3434 flow [2024-06-21 17:58:49,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:49,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:49,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:49,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 17:58:49,500 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:49,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:49,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1816936815, now seen corresponding path program 6 times [2024-06-21 17:58:49,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:49,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365117470] [2024-06-21 17:58:49,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:49,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:49,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:50,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:50,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:50,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365117470] [2024-06-21 17:58:50,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365117470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:50,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:50,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:58:50,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939981181] [2024-06-21 17:58:50,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:50,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:58:50,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:50,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:58:50,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:58:50,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:50,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 252 transitions, 3434 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:50,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:50,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:50,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:51,273 INFO L124 PetriNetUnfolderBase]: 3986/6078 cut-off events. [2024-06-21 17:58:51,273 INFO L125 PetriNetUnfolderBase]: For 376170/376172 co-relation queries the response was YES. [2024-06-21 17:58:51,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50679 conditions, 6078 events. 3986/6078 cut-off events. For 376170/376172 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 33779 event pairs, 874 based on Foata normal form. 26/6103 useless extension candidates. Maximal degree in co-relation 50585. Up to 4818 conditions per place. [2024-06-21 17:58:51,326 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 228 selfloop transitions, 80 changer transitions 0/311 dead transitions. [2024-06-21 17:58:51,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 311 transitions, 4850 flow [2024-06-21 17:58:51,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:58:51,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:58:51,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-21 17:58:51,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49166666666666664 [2024-06-21 17:58:51,327 INFO L175 Difference]: Start difference. First operand has 187 places, 252 transitions, 3434 flow. Second operand 9 states and 177 transitions. [2024-06-21 17:58:51,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 311 transitions, 4850 flow [2024-06-21 17:58:51,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 311 transitions, 4737 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 17:58:51,875 INFO L231 Difference]: Finished difference. Result has 193 places, 256 transitions, 3657 flow [2024-06-21 17:58:51,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3321, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3657, PETRI_PLACES=193, PETRI_TRANSITIONS=256} [2024-06-21 17:58:51,876 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 152 predicate places. [2024-06-21 17:58:51,876 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 256 transitions, 3657 flow [2024-06-21 17:58:51,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:51,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:51,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:51,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 17:58:51,877 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)] === [2024-06-21 17:58:51,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:51,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1914415909, now seen corresponding path program 7 times [2024-06-21 17:58:51,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:51,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526761756] [2024-06-21 17:58:51,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:51,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:51,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:52,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:52,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:52,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526761756] [2024-06-21 17:58:52,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526761756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:52,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:52,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:58:52,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485262462] [2024-06-21 17:58:52,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:52,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:58:52,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:52,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:58:52,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:58:52,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:52,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 256 transitions, 3657 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:52,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:52,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:52,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:53,603 INFO L124 PetriNetUnfolderBase]: 4138/6326 cut-off events. [2024-06-21 17:58:53,603 INFO L125 PetriNetUnfolderBase]: For 420611/420613 co-relation queries the response was YES. [2024-06-21 17:58:53,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53607 conditions, 6326 events. 4138/6326 cut-off events. For 420611/420613 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 35631 event pairs, 1056 based on Foata normal form. 38/6363 useless extension candidates. Maximal degree in co-relation 53511. Up to 5472 conditions per place. [2024-06-21 17:58:53,668 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 227 selfloop transitions, 82 changer transitions 0/312 dead transitions. [2024-06-21 17:58:53,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 312 transitions, 4803 flow [2024-06-21 17:58:53,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:58:53,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:58:53,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-21 17:58:53,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47 [2024-06-21 17:58:53,669 INFO L175 Difference]: Start difference. First operand has 193 places, 256 transitions, 3657 flow. Second operand 10 states and 188 transitions. [2024-06-21 17:58:53,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 312 transitions, 4803 flow [2024-06-21 17:58:54,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 312 transitions, 4612 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-21 17:58:54,445 INFO L231 Difference]: Finished difference. Result has 198 places, 258 transitions, 3737 flow [2024-06-21 17:58:54,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3468, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3737, PETRI_PLACES=198, PETRI_TRANSITIONS=258} [2024-06-21 17:58:54,446 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 157 predicate places. [2024-06-21 17:58:54,446 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 258 transitions, 3737 flow [2024-06-21 17:58:54,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:54,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:54,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:54,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 17:58:54,447 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)] === [2024-06-21 17:58:54,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:54,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1908701617, now seen corresponding path program 1 times [2024-06-21 17:58:54,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:54,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810276559] [2024-06-21 17:58:54,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:54,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:54,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:55,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:55,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:55,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810276559] [2024-06-21 17:58:55,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810276559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:55,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:55,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:58:55,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982019463] [2024-06-21 17:58:55,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:55,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:58:55,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:55,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:58:55,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:58:55,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:55,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 258 transitions, 3737 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:55,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:55,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:55,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:56,309 INFO L124 PetriNetUnfolderBase]: 4166/6370 cut-off events. [2024-06-21 17:58:56,309 INFO L125 PetriNetUnfolderBase]: For 408754/408756 co-relation queries the response was YES. [2024-06-21 17:58:56,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54177 conditions, 6370 events. 4166/6370 cut-off events. For 408754/408756 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 35997 event pairs, 1054 based on Foata normal form. 8/6377 useless extension candidates. Maximal degree in co-relation 54079. Up to 5888 conditions per place. [2024-06-21 17:58:56,387 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 228 selfloop transitions, 61 changer transitions 0/292 dead transitions. [2024-06-21 17:58:56,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 292 transitions, 4595 flow [2024-06-21 17:58:56,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:56,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:56,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 17:58:56,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-21 17:58:56,388 INFO L175 Difference]: Start difference. First operand has 198 places, 258 transitions, 3737 flow. Second operand 8 states and 141 transitions. [2024-06-21 17:58:56,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 292 transitions, 4595 flow [2024-06-21 17:58:57,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 292 transitions, 4374 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-21 17:58:57,317 INFO L231 Difference]: Finished difference. Result has 198 places, 261 transitions, 3758 flow [2024-06-21 17:58:57,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3516, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3758, PETRI_PLACES=198, PETRI_TRANSITIONS=261} [2024-06-21 17:58:57,317 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 157 predicate places. [2024-06-21 17:58:57,317 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 261 transitions, 3758 flow [2024-06-21 17:58:57,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:57,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:57,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:57,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 17:58:57,318 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:57,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:57,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1908694177, now seen corresponding path program 2 times [2024-06-21 17:58:57,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:57,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197793704] [2024-06-21 17:58:57,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:57,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:57,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:58,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:58,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:58,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197793704] [2024-06-21 17:58:58,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197793704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:58,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:58,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:58:58,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353752536] [2024-06-21 17:58:58,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:58,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:58:58,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:58,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:58:58,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:58:58,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:58,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 261 transitions, 3758 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:58,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:58,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:58,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:59,172 INFO L124 PetriNetUnfolderBase]: 4194/6414 cut-off events. [2024-06-21 17:58:59,172 INFO L125 PetriNetUnfolderBase]: For 417797/417799 co-relation queries the response was YES. [2024-06-21 17:58:59,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54224 conditions, 6414 events. 4194/6414 cut-off events. For 417797/417799 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 36307 event pairs, 1031 based on Foata normal form. 8/6421 useless extension candidates. Maximal degree in co-relation 54125. Up to 5778 conditions per place. [2024-06-21 17:58:59,240 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 223 selfloop transitions, 72 changer transitions 0/298 dead transitions. [2024-06-21 17:58:59,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 298 transitions, 4677 flow [2024-06-21 17:58:59,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:59,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:59,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 17:58:59,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-21 17:58:59,242 INFO L175 Difference]: Start difference. First operand has 198 places, 261 transitions, 3758 flow. Second operand 8 states and 141 transitions. [2024-06-21 17:58:59,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 298 transitions, 4677 flow [2024-06-21 17:59:00,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 298 transitions, 4465 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-21 17:59:00,197 INFO L231 Difference]: Finished difference. Result has 201 places, 267 transitions, 3881 flow [2024-06-21 17:59:00,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3546, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3881, PETRI_PLACES=201, PETRI_TRANSITIONS=267} [2024-06-21 17:59:00,197 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 160 predicate places. [2024-06-21 17:59:00,197 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 267 transitions, 3881 flow [2024-06-21 17:59:00,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:00,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:00,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:00,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 17:59:00,198 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:00,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:00,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1908909379, now seen corresponding path program 8 times [2024-06-21 17:59:00,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:00,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399075628] [2024-06-21 17:59:00,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:00,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:00,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:00,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:00,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:00,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399075628] [2024-06-21 17:59:00,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399075628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:00,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:00,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:59:00,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120886930] [2024-06-21 17:59:00,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:00,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:59:00,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:00,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:59:00,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:59:00,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:59:00,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 267 transitions, 3881 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:00,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:00,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:59:00,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:02,075 INFO L124 PetriNetUnfolderBase]: 4318/6618 cut-off events. [2024-06-21 17:59:02,075 INFO L125 PetriNetUnfolderBase]: For 471143/471145 co-relation queries the response was YES. [2024-06-21 17:59:02,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56551 conditions, 6618 events. 4318/6618 cut-off events. For 471143/471145 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 37836 event pairs, 1092 based on Foata normal form. 32/6649 useless extension candidates. Maximal degree in co-relation 56450. Up to 5908 conditions per place. [2024-06-21 17:59:02,138 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 240 selfloop transitions, 66 changer transitions 0/309 dead transitions. [2024-06-21 17:59:02,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 309 transitions, 4811 flow [2024-06-21 17:59:02,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:59:02,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:59:02,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 17:59:02,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-21 17:59:02,140 INFO L175 Difference]: Start difference. First operand has 201 places, 267 transitions, 3881 flow. Second operand 9 states and 161 transitions. [2024-06-21 17:59:02,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 309 transitions, 4811 flow [2024-06-21 17:59:02,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 309 transitions, 4615 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-21 17:59:02,961 INFO L231 Difference]: Finished difference. Result has 206 places, 269 transitions, 3934 flow [2024-06-21 17:59:02,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3685, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3934, PETRI_PLACES=206, PETRI_TRANSITIONS=269} [2024-06-21 17:59:02,962 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 165 predicate places. [2024-06-21 17:59:02,962 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 269 transitions, 3934 flow [2024-06-21 17:59:02,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:02,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:02,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:02,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 17:59:02,963 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:02,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:02,963 INFO L85 PathProgramCache]: Analyzing trace with hash 2141181252, now seen corresponding path program 1 times [2024-06-21 17:59:02,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:02,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631903076] [2024-06-21 17:59:02,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:02,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:02,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:03,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:03,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:03,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631903076] [2024-06-21 17:59:03,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631903076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:03,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:03,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:59:03,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144396896] [2024-06-21 17:59:03,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:03,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:59:03,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:03,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:59:03,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:59:03,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:59:03,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 269 transitions, 3934 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:03,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:03,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:59:03,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:04,425 INFO L124 PetriNetUnfolderBase]: 4328/6630 cut-off events. [2024-06-21 17:59:04,426 INFO L125 PetriNetUnfolderBase]: For 460252/460252 co-relation queries the response was YES. [2024-06-21 17:59:04,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57239 conditions, 6630 events. 4328/6630 cut-off events. For 460252/460252 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 37950 event pairs, 1237 based on Foata normal form. 2/6631 useless extension candidates. Maximal degree in co-relation 57136. Up to 6569 conditions per place. [2024-06-21 17:59:04,499 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 269 selfloop transitions, 23 changer transitions 0/295 dead transitions. [2024-06-21 17:59:04,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 295 transitions, 4774 flow [2024-06-21 17:59:04,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:59:04,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:59:04,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 17:59:04,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-21 17:59:04,501 INFO L175 Difference]: Start difference. First operand has 206 places, 269 transitions, 3934 flow. Second operand 7 states and 113 transitions. [2024-06-21 17:59:04,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 295 transitions, 4774 flow [2024-06-21 17:59:05,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 295 transitions, 4579 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-21 17:59:05,485 INFO L231 Difference]: Finished difference. Result has 207 places, 275 transitions, 3907 flow [2024-06-21 17:59:05,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3739, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3907, PETRI_PLACES=207, PETRI_TRANSITIONS=275} [2024-06-21 17:59:05,485 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 166 predicate places. [2024-06-21 17:59:05,485 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 275 transitions, 3907 flow [2024-06-21 17:59:05,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:05,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:05,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:05,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 17:59:05,486 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:05,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:05,486 INFO L85 PathProgramCache]: Analyzing trace with hash 2141180880, now seen corresponding path program 2 times [2024-06-21 17:59:05,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:05,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850660223] [2024-06-21 17:59:05,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:05,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:05,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:05,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:05,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:05,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850660223] [2024-06-21 17:59:05,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850660223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:05,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:05,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:59:05,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906948476] [2024-06-21 17:59:05,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:05,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:59:05,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:05,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:59:05,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:59:05,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:59:05,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 275 transitions, 3907 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:05,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:05,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:59:05,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:06,990 INFO L124 PetriNetUnfolderBase]: 4394/6724 cut-off events. [2024-06-21 17:59:06,990 INFO L125 PetriNetUnfolderBase]: For 468541/468543 co-relation queries the response was YES. [2024-06-21 17:59:07,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57655 conditions, 6724 events. 4394/6724 cut-off events. For 468541/468543 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 38499 event pairs, 1103 based on Foata normal form. 6/6729 useless extension candidates. Maximal degree in co-relation 57551. Up to 6222 conditions per place. [2024-06-21 17:59:07,072 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 236 selfloop transitions, 70 changer transitions 0/309 dead transitions. [2024-06-21 17:59:07,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 309 transitions, 5025 flow [2024-06-21 17:59:07,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:59:07,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:59:07,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 17:59:07,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-21 17:59:07,073 INFO L175 Difference]: Start difference. First operand has 207 places, 275 transitions, 3907 flow. Second operand 7 states and 122 transitions. [2024-06-21 17:59:07,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 309 transitions, 5025 flow [2024-06-21 17:59:07,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 309 transitions, 4963 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-21 17:59:07,848 INFO L231 Difference]: Finished difference. Result has 212 places, 288 transitions, 4283 flow [2024-06-21 17:59:07,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3845, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4283, PETRI_PLACES=212, PETRI_TRANSITIONS=288} [2024-06-21 17:59:07,849 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 171 predicate places. [2024-06-21 17:59:07,849 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 288 transitions, 4283 flow [2024-06-21 17:59:07,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:07,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:07,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:07,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 17:59:07,850 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)] === [2024-06-21 17:59:07,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:07,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1100397517, now seen corresponding path program 3 times [2024-06-21 17:59:07,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:07,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458285377] [2024-06-21 17:59:07,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:07,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:07,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:08,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:08,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:08,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458285377] [2024-06-21 17:59:08,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458285377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:08,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:08,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:59:08,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125162693] [2024-06-21 17:59:08,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:08,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:59:08,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:08,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:59:08,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:59:08,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:59:08,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 288 transitions, 4283 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:08,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:08,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:59:08,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:09,774 INFO L124 PetriNetUnfolderBase]: 4419/6762 cut-off events. [2024-06-21 17:59:09,774 INFO L125 PetriNetUnfolderBase]: For 494308/494314 co-relation queries the response was YES. [2024-06-21 17:59:09,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58597 conditions, 6762 events. 4419/6762 cut-off events. For 494308/494314 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 38788 event pairs, 1216 based on Foata normal form. 18/6779 useless extension candidates. Maximal degree in co-relation 58490. Up to 6570 conditions per place. [2024-06-21 17:59:09,849 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 272 selfloop transitions, 43 changer transitions 0/318 dead transitions. [2024-06-21 17:59:09,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 318 transitions, 5123 flow [2024-06-21 17:59:09,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:59:09,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:59:09,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 17:59:09,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-21 17:59:09,850 INFO L175 Difference]: Start difference. First operand has 212 places, 288 transitions, 4283 flow. Second operand 8 states and 134 transitions. [2024-06-21 17:59:09,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 318 transitions, 5123 flow [2024-06-21 17:59:10,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 318 transitions, 5025 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-21 17:59:10,705 INFO L231 Difference]: Finished difference. Result has 217 places, 292 transitions, 4431 flow [2024-06-21 17:59:10,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4185, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4431, PETRI_PLACES=217, PETRI_TRANSITIONS=292} [2024-06-21 17:59:10,706 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 176 predicate places. [2024-06-21 17:59:10,706 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 292 transitions, 4431 flow [2024-06-21 17:59:10,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:10,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:10,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:10,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 17:59:10,707 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)] === [2024-06-21 17:59:10,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:10,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1100397300, now seen corresponding path program 1 times [2024-06-21 17:59:10,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:10,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262696417] [2024-06-21 17:59:10,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:10,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:10,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:11,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:11,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:11,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262696417] [2024-06-21 17:59:11,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262696417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:11,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:11,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:59:11,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542585888] [2024-06-21 17:59:11,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:11,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:59:11,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:11,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:59:11,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:59:11,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:59:11,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 292 transitions, 4431 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:11,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:11,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:59:11,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:12,756 INFO L124 PetriNetUnfolderBase]: 4419/6762 cut-off events. [2024-06-21 17:59:12,756 INFO L125 PetriNetUnfolderBase]: For 497957/497963 co-relation queries the response was YES. [2024-06-21 17:59:12,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58911 conditions, 6762 events. 4419/6762 cut-off events. For 497957/497963 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 38728 event pairs, 1233 based on Foata normal form. 9/6770 useless extension candidates. Maximal degree in co-relation 58803. Up to 6575 conditions per place. [2024-06-21 17:59:12,837 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 272 selfloop transitions, 47 changer transitions 0/322 dead transitions. [2024-06-21 17:59:12,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 322 transitions, 5258 flow [2024-06-21 17:59:12,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:59:12,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:59:12,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 17:59:12,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-21 17:59:12,839 INFO L175 Difference]: Start difference. First operand has 217 places, 292 transitions, 4431 flow. Second operand 8 states and 135 transitions. [2024-06-21 17:59:12,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 322 transitions, 5258 flow [2024-06-21 17:59:13,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 322 transitions, 5052 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-06-21 17:59:13,824 INFO L231 Difference]: Finished difference. Result has 219 places, 296 transitions, 4460 flow [2024-06-21 17:59:13,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4225, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4460, PETRI_PLACES=219, PETRI_TRANSITIONS=296} [2024-06-21 17:59:13,824 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 178 predicate places. [2024-06-21 17:59:13,825 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 296 transitions, 4460 flow [2024-06-21 17:59:13,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:13,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:13,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:13,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 17:59:13,825 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:13,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:13,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1100404957, now seen corresponding path program 4 times [2024-06-21 17:59:13,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:13,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000363062] [2024-06-21 17:59:13,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:13,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:13,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:14,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:14,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:14,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000363062] [2024-06-21 17:59:14,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000363062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:14,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:14,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:59:14,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212305479] [2024-06-21 17:59:14,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:14,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:59:14,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:14,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:59:14,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:59:14,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:59:14,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 296 transitions, 4460 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:14,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:14,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:59:14,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:15,881 INFO L124 PetriNetUnfolderBase]: 4444/6801 cut-off events. [2024-06-21 17:59:15,881 INFO L125 PetriNetUnfolderBase]: For 519415/519421 co-relation queries the response was YES. [2024-06-21 17:59:15,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59046 conditions, 6801 events. 4444/6801 cut-off events. For 519415/519421 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 39030 event pairs, 1238 based on Foata normal form. 18/6818 useless extension candidates. Maximal degree in co-relation 58937. Up to 6499 conditions per place. [2024-06-21 17:59:15,948 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 274 selfloop transitions, 49 changer transitions 0/326 dead transitions. [2024-06-21 17:59:15,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 326 transitions, 5319 flow [2024-06-21 17:59:15,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:59:15,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:59:15,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 17:59:15,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-21 17:59:15,949 INFO L175 Difference]: Start difference. First operand has 219 places, 296 transitions, 4460 flow. Second operand 8 states and 135 transitions. [2024-06-21 17:59:15,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 326 transitions, 5319 flow [2024-06-21 17:59:16,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 326 transitions, 5141 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-21 17:59:16,854 INFO L231 Difference]: Finished difference. Result has 221 places, 300 transitions, 4544 flow [2024-06-21 17:59:16,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4282, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4544, PETRI_PLACES=221, PETRI_TRANSITIONS=300} [2024-06-21 17:59:16,855 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 180 predicate places. [2024-06-21 17:59:16,855 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 300 transitions, 4544 flow [2024-06-21 17:59:16,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:16,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:16,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:16,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 17:59:16,856 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:16,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:16,856 INFO L85 PathProgramCache]: Analyzing trace with hash 843689245, now seen corresponding path program 9 times [2024-06-21 17:59:16,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:16,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552862438] [2024-06-21 17:59:16,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:16,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:16,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:17,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:17,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:17,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552862438] [2024-06-21 17:59:17,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552862438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:17,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:17,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:59:17,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882980416] [2024-06-21 17:59:17,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:17,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:59:17,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:17,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:59:17,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:59:17,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:59:17,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 300 transitions, 4544 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:17,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:17,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:59:17,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:18,695 INFO L124 PetriNetUnfolderBase]: 4444/6801 cut-off events. [2024-06-21 17:59:18,695 INFO L125 PetriNetUnfolderBase]: For 539547/539553 co-relation queries the response was YES. [2024-06-21 17:59:18,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58564 conditions, 6801 events. 4444/6801 cut-off events. For 539547/539553 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 38973 event pairs, 1213 based on Foata normal form. 36/6836 useless extension candidates. Maximal degree in co-relation 58454. Up to 6467 conditions per place. [2024-06-21 17:59:18,777 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 302 selfloop transitions, 34 changer transitions 0/339 dead transitions. [2024-06-21 17:59:18,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 339 transitions, 5448 flow [2024-06-21 17:59:18,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:59:18,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:59:18,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 17:59:18,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-21 17:59:18,778 INFO L175 Difference]: Start difference. First operand has 221 places, 300 transitions, 4544 flow. Second operand 9 states and 152 transitions. [2024-06-21 17:59:18,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 339 transitions, 5448 flow [2024-06-21 17:59:19,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 339 transitions, 5217 flow, removed 67 selfloop flow, removed 6 redundant places. [2024-06-21 17:59:19,846 INFO L231 Difference]: Finished difference. Result has 224 places, 303 transitions, 4520 flow [2024-06-21 17:59:19,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4317, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4520, PETRI_PLACES=224, PETRI_TRANSITIONS=303} [2024-06-21 17:59:19,847 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 183 predicate places. [2024-06-21 17:59:19,847 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 303 transitions, 4520 flow [2024-06-21 17:59:19,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:19,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:19,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:19,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 17:59:19,848 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:19,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:19,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1109601727, now seen corresponding path program 5 times [2024-06-21 17:59:19,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:19,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888821168] [2024-06-21 17:59:19,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:19,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:19,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:20,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:20,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:20,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888821168] [2024-06-21 17:59:20,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888821168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:20,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:20,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:59:20,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833062845] [2024-06-21 17:59:20,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:20,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:59:20,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:20,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:59:20,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:59:20,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:59:20,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 303 transitions, 4520 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:20,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:20,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:59:20,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:21,868 INFO L124 PetriNetUnfolderBase]: 4444/6801 cut-off events. [2024-06-21 17:59:21,868 INFO L125 PetriNetUnfolderBase]: For 518171/518177 co-relation queries the response was YES. [2024-06-21 17:59:21,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58135 conditions, 6801 events. 4444/6801 cut-off events. For 518171/518177 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 38850 event pairs, 1204 based on Foata normal form. 12/6812 useless extension candidates. Maximal degree in co-relation 58024. Up to 6650 conditions per place. [2024-06-21 17:59:21,948 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 297 selfloop transitions, 32 changer transitions 0/332 dead transitions. [2024-06-21 17:59:21,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 332 transitions, 5368 flow [2024-06-21 17:59:21,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:59:21,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:59:21,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 17:59:21,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-21 17:59:21,950 INFO L175 Difference]: Start difference. First operand has 224 places, 303 transitions, 4520 flow. Second operand 8 states and 132 transitions. [2024-06-21 17:59:21,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 332 transitions, 5368 flow [2024-06-21 17:59:22,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 332 transitions, 5221 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-21 17:59:22,860 INFO L231 Difference]: Finished difference. Result has 225 places, 306 transitions, 4577 flow [2024-06-21 17:59:22,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4373, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4577, PETRI_PLACES=225, PETRI_TRANSITIONS=306} [2024-06-21 17:59:22,861 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 184 predicate places. [2024-06-21 17:59:22,861 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 306 transitions, 4577 flow [2024-06-21 17:59:22,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:22,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:22,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:22,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 17:59:22,861 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:22,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:22,862 INFO L85 PathProgramCache]: Analyzing trace with hash -741346684, now seen corresponding path program 2 times [2024-06-21 17:59:22,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:22,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993989091] [2024-06-21 17:59:22,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:22,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:22,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:23,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:23,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:23,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993989091] [2024-06-21 17:59:23,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993989091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:23,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:23,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:59:23,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070228411] [2024-06-21 17:59:23,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:23,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:59:23,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:23,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:59:23,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:59:23,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:59:23,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 306 transitions, 4577 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:23,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:23,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:59:23,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:24,485 INFO L124 PetriNetUnfolderBase]: 4454/6814 cut-off events. [2024-06-21 17:59:24,485 INFO L125 PetriNetUnfolderBase]: For 513011/513011 co-relation queries the response was YES. [2024-06-21 17:59:24,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57838 conditions, 6814 events. 4454/6814 cut-off events. For 513011/513011 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 39005 event pairs, 1217 based on Foata normal form. 2/6815 useless extension candidates. Maximal degree in co-relation 57726. Up to 6773 conditions per place. [2024-06-21 17:59:24,566 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 301 selfloop transitions, 19 changer transitions 0/323 dead transitions. [2024-06-21 17:59:24,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 323 transitions, 5414 flow [2024-06-21 17:59:24,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:59:24,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:59:24,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2024-06-21 17:59:24,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 17:59:24,567 INFO L175 Difference]: Start difference. First operand has 225 places, 306 transitions, 4577 flow. Second operand 7 states and 105 transitions. [2024-06-21 17:59:24,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 323 transitions, 5414 flow [2024-06-21 17:59:25,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 323 transitions, 5234 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-21 17:59:25,689 INFO L231 Difference]: Finished difference. Result has 226 places, 309 transitions, 4494 flow [2024-06-21 17:59:25,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4397, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4494, PETRI_PLACES=226, PETRI_TRANSITIONS=309} [2024-06-21 17:59:25,689 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 185 predicate places. [2024-06-21 17:59:25,689 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 309 transitions, 4494 flow [2024-06-21 17:59:25,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:25,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:25,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:25,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 17:59:25,690 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:25,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:25,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1499530096, now seen corresponding path program 3 times [2024-06-21 17:59:25,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:25,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20453505] [2024-06-21 17:59:25,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:25,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:25,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:26,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:26,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:26,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20453505] [2024-06-21 17:59:26,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20453505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:26,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:26,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:59:26,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040248081] [2024-06-21 17:59:26,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:26,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:59:26,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:26,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:59:26,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:59:26,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:59:26,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 309 transitions, 4494 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:26,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:26,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:59:26,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:27,355 INFO L124 PetriNetUnfolderBase]: 4456/6817 cut-off events. [2024-06-21 17:59:27,355 INFO L125 PetriNetUnfolderBase]: For 523129/523129 co-relation queries the response was YES. [2024-06-21 17:59:27,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57729 conditions, 6817 events. 4456/6817 cut-off events. For 523129/523129 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 39034 event pairs, 1217 based on Foata normal form. 2/6818 useless extension candidates. Maximal degree in co-relation 57616. Up to 6790 conditions per place. [2024-06-21 17:59:27,443 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 306 selfloop transitions, 17 changer transitions 0/326 dead transitions. [2024-06-21 17:59:27,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 326 transitions, 5247 flow [2024-06-21 17:59:27,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:59:27,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:59:27,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 101 transitions. [2024-06-21 17:59:27,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3607142857142857 [2024-06-21 17:59:27,444 INFO L175 Difference]: Start difference. First operand has 226 places, 309 transitions, 4494 flow. Second operand 7 states and 101 transitions. [2024-06-21 17:59:27,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 326 transitions, 5247 flow [2024-06-21 17:59:28,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 326 transitions, 5165 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 17:59:28,519 INFO L231 Difference]: Finished difference. Result has 229 places, 315 transitions, 4545 flow [2024-06-21 17:59:28,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4422, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4545, PETRI_PLACES=229, PETRI_TRANSITIONS=315} [2024-06-21 17:59:28,520 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 188 predicate places. [2024-06-21 17:59:28,520 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 315 transitions, 4545 flow [2024-06-21 17:59:28,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:28,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:28,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:28,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 17:59:28,521 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:28,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:28,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1499114014, now seen corresponding path program 3 times [2024-06-21 17:59:28,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:28,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82998967] [2024-06-21 17:59:28,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:28,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:28,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:28,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:28,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:28,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82998967] [2024-06-21 17:59:28,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82998967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:28,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:28,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:59:28,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415324406] [2024-06-21 17:59:28,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:28,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:59:28,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:28,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:59:28,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:59:28,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:59:28,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 315 transitions, 4545 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:28,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:28,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:59:28,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:30,142 INFO L124 PetriNetUnfolderBase]: 4450/6812 cut-off events. [2024-06-21 17:59:30,142 INFO L125 PetriNetUnfolderBase]: For 535019/535021 co-relation queries the response was YES. [2024-06-21 17:59:30,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57869 conditions, 6812 events. 4450/6812 cut-off events. For 535019/535021 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 39036 event pairs, 1219 based on Foata normal form. 6/6817 useless extension candidates. Maximal degree in co-relation 57754. Up to 6716 conditions per place. [2024-06-21 17:59:30,226 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 291 selfloop transitions, 34 changer transitions 0/328 dead transitions. [2024-06-21 17:59:30,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 328 transitions, 5345 flow [2024-06-21 17:59:30,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:59:30,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:59:30,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-21 17:59:30,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 17:59:30,227 INFO L175 Difference]: Start difference. First operand has 229 places, 315 transitions, 4545 flow. Second operand 7 states and 112 transitions. [2024-06-21 17:59:30,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 328 transitions, 5345 flow [2024-06-21 17:59:31,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 328 transitions, 5283 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-21 17:59:31,293 INFO L231 Difference]: Finished difference. Result has 233 places, 315 transitions, 4561 flow [2024-06-21 17:59:31,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4483, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4561, PETRI_PLACES=233, PETRI_TRANSITIONS=315} [2024-06-21 17:59:31,296 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 192 predicate places. [2024-06-21 17:59:31,296 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 315 transitions, 4561 flow [2024-06-21 17:59:31,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:31,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:31,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:31,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 17:59:31,297 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:31,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:31,297 INFO L85 PathProgramCache]: Analyzing trace with hash 897169296, now seen corresponding path program 1 times [2024-06-21 17:59:31,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:31,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426349534] [2024-06-21 17:59:31,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:31,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:31,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:31,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:31,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:31,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426349534] [2024-06-21 17:59:31,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426349534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:31,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:31,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:59:31,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554208540] [2024-06-21 17:59:31,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:31,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:59:31,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:31,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:59:31,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:59:31,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:59:31,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 315 transitions, 4561 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:31,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:31,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:59:31,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:33,060 INFO L124 PetriNetUnfolderBase]: 4480/6852 cut-off events. [2024-06-21 17:59:33,060 INFO L125 PetriNetUnfolderBase]: For 555203/555203 co-relation queries the response was YES. [2024-06-21 17:59:33,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58470 conditions, 6852 events. 4480/6852 cut-off events. For 555203/555203 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 39192 event pairs, 1213 based on Foata normal form. 6/6857 useless extension candidates. Maximal degree in co-relation 58354. Up to 6713 conditions per place. [2024-06-21 17:59:33,142 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 303 selfloop transitions, 32 changer transitions 0/338 dead transitions. [2024-06-21 17:59:33,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 338 transitions, 5493 flow [2024-06-21 17:59:33,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:59:33,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:59:33,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 17:59:33,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-21 17:59:33,144 INFO L175 Difference]: Start difference. First operand has 233 places, 315 transitions, 4561 flow. Second operand 7 states and 116 transitions. [2024-06-21 17:59:33,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 338 transitions, 5493 flow [2024-06-21 17:59:34,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 338 transitions, 5180 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-06-21 17:59:34,172 INFO L231 Difference]: Finished difference. Result has 230 places, 319 transitions, 4386 flow [2024-06-21 17:59:34,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4248, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4386, PETRI_PLACES=230, PETRI_TRANSITIONS=319} [2024-06-21 17:59:34,173 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 189 predicate places. [2024-06-21 17:59:34,173 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 319 transitions, 4386 flow [2024-06-21 17:59:34,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:34,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:34,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:34,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 17:59:34,173 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:34,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:34,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1410386898, now seen corresponding path program 2 times [2024-06-21 17:59:34,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:34,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247053870] [2024-06-21 17:59:34,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:34,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:34,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:34,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:34,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:34,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247053870] [2024-06-21 17:59:34,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247053870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:34,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:34,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:59:34,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708925834] [2024-06-21 17:59:34,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:34,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:59:34,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:34,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:59:34,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:59:34,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:59:34,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 319 transitions, 4386 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:34,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:34,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:59:34,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:35,938 INFO L124 PetriNetUnfolderBase]: 4490/6868 cut-off events. [2024-06-21 17:59:35,939 INFO L125 PetriNetUnfolderBase]: For 562884/562886 co-relation queries the response was YES. [2024-06-21 17:59:35,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58383 conditions, 6868 events. 4490/6868 cut-off events. For 562884/562886 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 39304 event pairs, 1232 based on Foata normal form. 2/6869 useless extension candidates. Maximal degree in co-relation 58268. Up to 6719 conditions per place. [2024-06-21 17:59:36,031 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 302 selfloop transitions, 38 changer transitions 0/343 dead transitions. [2024-06-21 17:59:36,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 343 transitions, 5476 flow [2024-06-21 17:59:36,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:59:36,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:59:36,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-21 17:59:36,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 17:59:36,033 INFO L175 Difference]: Start difference. First operand has 230 places, 319 transitions, 4386 flow. Second operand 7 states and 115 transitions. [2024-06-21 17:59:36,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 343 transitions, 5476 flow [2024-06-21 17:59:37,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 343 transitions, 5347 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 17:59:37,214 INFO L231 Difference]: Finished difference. Result has 231 places, 325 transitions, 4463 flow [2024-06-21 17:59:37,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4269, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4463, PETRI_PLACES=231, PETRI_TRANSITIONS=325} [2024-06-21 17:59:37,215 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 190 predicate places. [2024-06-21 17:59:37,215 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 325 transitions, 4463 flow [2024-06-21 17:59:37,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:37,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:37,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:37,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 17:59:37,216 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:37,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:37,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1930610258, now seen corresponding path program 3 times [2024-06-21 17:59:37,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:37,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051285427] [2024-06-21 17:59:37,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:37,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:37,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:37,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:37,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:37,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051285427] [2024-06-21 17:59:37,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051285427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:37,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:37,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:59:37,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730236266] [2024-06-21 17:59:37,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:37,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:59:37,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:37,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:59:37,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:59:37,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:59:37,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 325 transitions, 4463 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:37,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:37,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:59:37,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:38,892 INFO L124 PetriNetUnfolderBase]: 4484/6860 cut-off events. [2024-06-21 17:59:38,892 INFO L125 PetriNetUnfolderBase]: For 558097/558099 co-relation queries the response was YES. [2024-06-21 17:59:38,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58094 conditions, 6860 events. 4484/6860 cut-off events. For 558097/558099 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 39235 event pairs, 1232 based on Foata normal form. 2/6861 useless extension candidates. Maximal degree in co-relation 57979. Up to 6716 conditions per place. [2024-06-21 17:59:38,976 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 298 selfloop transitions, 40 changer transitions 0/341 dead transitions. [2024-06-21 17:59:38,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 341 transitions, 5305 flow [2024-06-21 17:59:38,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:59:38,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:59:38,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-21 17:59:38,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-21 17:59:38,978 INFO L175 Difference]: Start difference. First operand has 231 places, 325 transitions, 4463 flow. Second operand 7 states and 114 transitions. [2024-06-21 17:59:38,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 341 transitions, 5305 flow [2024-06-21 17:59:39,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 341 transitions, 5206 flow, removed 39 selfloop flow, removed 2 redundant places. [2024-06-21 17:59:39,983 INFO L231 Difference]: Finished difference. Result has 236 places, 325 transitions, 4451 flow [2024-06-21 17:59:39,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4364, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4451, PETRI_PLACES=236, PETRI_TRANSITIONS=325} [2024-06-21 17:59:39,984 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 195 predicate places. [2024-06-21 17:59:39,984 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 325 transitions, 4451 flow [2024-06-21 17:59:39,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:39,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:39,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:39,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 17:59:39,984 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:39,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:39,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1499544976, now seen corresponding path program 1 times [2024-06-21 17:59:39,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:39,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2778046] [2024-06-21 17:59:39,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:39,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:39,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:40,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:40,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:40,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2778046] [2024-06-21 17:59:40,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2778046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:40,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:40,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:40,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993257168] [2024-06-21 17:59:40,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:40,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:40,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:40,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:40,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:40,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:59:40,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 325 transitions, 4451 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:40,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:40,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:59:40,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:42,053 INFO L124 PetriNetUnfolderBase]: 4479/6851 cut-off events. [2024-06-21 17:59:42,054 INFO L125 PetriNetUnfolderBase]: For 568622/568622 co-relation queries the response was YES. [2024-06-21 17:59:42,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58135 conditions, 6851 events. 4479/6851 cut-off events. For 568622/568622 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 39034 event pairs, 1214 based on Foata normal form. 2/6852 useless extension candidates. Maximal degree in co-relation 58017. Up to 6824 conditions per place. [2024-06-21 17:59:42,147 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 320 selfloop transitions, 15 changer transitions 0/338 dead transitions. [2024-06-21 17:59:42,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 338 transitions, 5181 flow [2024-06-21 17:59:42,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:59:42,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:59:42,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 100 transitions. [2024-06-21 17:59:42,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-21 17:59:42,149 INFO L175 Difference]: Start difference. First operand has 236 places, 325 transitions, 4451 flow. Second operand 7 states and 100 transitions. [2024-06-21 17:59:42,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 338 transitions, 5181 flow [2024-06-21 17:59:43,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 338 transitions, 5078 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 17:59:43,070 INFO L231 Difference]: Finished difference. Result has 236 places, 327 transitions, 4421 flow [2024-06-21 17:59:43,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4348, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4421, PETRI_PLACES=236, PETRI_TRANSITIONS=327} [2024-06-21 17:59:43,072 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 195 predicate places. [2024-06-21 17:59:43,072 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 327 transitions, 4421 flow [2024-06-21 17:59:43,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:43,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:43,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:43,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 17:59:43,073 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:43,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:43,073 INFO L85 PathProgramCache]: Analyzing trace with hash -2134200375, now seen corresponding path program 1 times [2024-06-21 17:59:43,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:43,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605026269] [2024-06-21 17:59:43,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:43,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:43,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:43,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:43,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:43,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605026269] [2024-06-21 17:59:43,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605026269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:43,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:43,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:43,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396011257] [2024-06-21 17:59:43,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:43,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:43,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:43,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:43,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:43,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:59:43,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 327 transitions, 4421 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:43,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:43,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:59:43,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:45,214 INFO L124 PetriNetUnfolderBase]: 4926/7505 cut-off events. [2024-06-21 17:59:45,215 INFO L125 PetriNetUnfolderBase]: For 614204/614206 co-relation queries the response was YES. [2024-06-21 17:59:45,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64742 conditions, 7505 events. 4926/7505 cut-off events. For 614204/614206 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 43085 event pairs, 1161 based on Foata normal form. 6/7510 useless extension candidates. Maximal degree in co-relation 64624. Up to 6812 conditions per place. [2024-06-21 17:59:45,296 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 321 selfloop transitions, 99 changer transitions 0/423 dead transitions. [2024-06-21 17:59:45,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 423 transitions, 6623 flow [2024-06-21 17:59:45,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:59:45,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:59:45,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-21 17:59:45,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-21 17:59:45,298 INFO L175 Difference]: Start difference. First operand has 236 places, 327 transitions, 4421 flow. Second operand 10 states and 165 transitions. [2024-06-21 17:59:45,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 423 transitions, 6623 flow [2024-06-21 17:59:46,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 423 transitions, 6564 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 17:59:46,350 INFO L231 Difference]: Finished difference. Result has 246 places, 382 transitions, 5681 flow [2024-06-21 17:59:46,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4364, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5681, PETRI_PLACES=246, PETRI_TRANSITIONS=382} [2024-06-21 17:59:46,350 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 205 predicate places. [2024-06-21 17:59:46,351 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 382 transitions, 5681 flow [2024-06-21 17:59:46,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:46,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:46,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:46,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 17:59:46,351 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:46,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:46,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1951895799, now seen corresponding path program 1 times [2024-06-21 17:59:46,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:46,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418983384] [2024-06-21 17:59:46,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:46,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:46,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:46,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:46,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:46,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418983384] [2024-06-21 17:59:46,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418983384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:46,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:46,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:59:46,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136744033] [2024-06-21 17:59:46,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:46,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:59:46,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:46,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:59:46,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:59:46,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:59:46,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 382 transitions, 5681 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:46,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:46,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:59:46,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:48,058 INFO L124 PetriNetUnfolderBase]: 4918/7490 cut-off events. [2024-06-21 17:59:48,058 INFO L125 PetriNetUnfolderBase]: For 634220/634228 co-relation queries the response was YES. [2024-06-21 17:59:48,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65990 conditions, 7490 events. 4918/7490 cut-off events. For 634220/634228 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 42948 event pairs, 1115 based on Foata normal form. 18/7507 useless extension candidates. Maximal degree in co-relation 65866. Up to 6755 conditions per place. [2024-06-21 17:59:48,150 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 309 selfloop transitions, 100 changer transitions 0/412 dead transitions. [2024-06-21 17:59:48,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 412 transitions, 6948 flow [2024-06-21 17:59:48,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:59:48,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:59:48,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 17:59:48,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 17:59:48,151 INFO L175 Difference]: Start difference. First operand has 246 places, 382 transitions, 5681 flow. Second operand 7 states and 125 transitions. [2024-06-21 17:59:48,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 412 transitions, 6948 flow [2024-06-21 17:59:49,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 412 transitions, 6898 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-06-21 17:59:49,646 INFO L231 Difference]: Finished difference. Result has 252 places, 389 transitions, 5979 flow [2024-06-21 17:59:49,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5631, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5979, PETRI_PLACES=252, PETRI_TRANSITIONS=389} [2024-06-21 17:59:49,647 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 211 predicate places. [2024-06-21 17:59:49,647 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 389 transitions, 5979 flow [2024-06-21 17:59:49,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:49,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:49,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:49,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 17:59:49,647 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:49,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:49,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1946538999, now seen corresponding path program 2 times [2024-06-21 17:59:49,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:49,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201999323] [2024-06-21 17:59:49,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:49,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:49,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:50,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:50,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:50,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201999323] [2024-06-21 17:59:50,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201999323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:50,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:50,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:59:50,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839090613] [2024-06-21 17:59:50,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:50,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:59:50,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:50,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:59:50,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:59:50,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:59:50,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 389 transitions, 5979 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:50,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:50,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:59:50,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:51,560 INFO L124 PetriNetUnfolderBase]: 4884/7442 cut-off events. [2024-06-21 17:59:51,560 INFO L125 PetriNetUnfolderBase]: For 629393/629398 co-relation queries the response was YES. [2024-06-21 17:59:51,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66090 conditions, 7442 events. 4884/7442 cut-off events. For 629393/629398 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 42631 event pairs, 1143 based on Foata normal form. 8/7449 useless extension candidates. Maximal degree in co-relation 65963. Up to 6723 conditions per place. [2024-06-21 17:59:51,653 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 301 selfloop transitions, 104 changer transitions 0/408 dead transitions. [2024-06-21 17:59:51,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 408 transitions, 7097 flow [2024-06-21 17:59:51,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:59:51,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:59:51,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 17:59:51,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 17:59:51,654 INFO L175 Difference]: Start difference. First operand has 252 places, 389 transitions, 5979 flow. Second operand 7 states and 120 transitions. [2024-06-21 17:59:51,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 408 transitions, 7097 flow [2024-06-21 17:59:53,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 408 transitions, 6934 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 17:59:53,018 INFO L231 Difference]: Finished difference. Result has 255 places, 389 transitions, 6038 flow [2024-06-21 17:59:53,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5816, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6038, PETRI_PLACES=255, PETRI_TRANSITIONS=389} [2024-06-21 17:59:53,018 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 214 predicate places. [2024-06-21 17:59:53,019 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 389 transitions, 6038 flow [2024-06-21 17:59:53,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:53,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:53,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:53,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 17:59:53,019 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:53,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:53,020 INFO L85 PathProgramCache]: Analyzing trace with hash 960023498, now seen corresponding path program 1 times [2024-06-21 17:59:53,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:53,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333044514] [2024-06-21 17:59:53,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:53,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:53,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:53,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:53,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:53,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333044514] [2024-06-21 17:59:53,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333044514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:53,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:53,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:59:53,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398920798] [2024-06-21 17:59:53,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:53,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:59:53,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:53,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:59:53,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:59:54,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:59:54,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 389 transitions, 6038 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:54,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:54,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:59:54,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:55,772 INFO L124 PetriNetUnfolderBase]: 5376/8220 cut-off events. [2024-06-21 17:59:55,772 INFO L125 PetriNetUnfolderBase]: For 862929/862934 co-relation queries the response was YES. [2024-06-21 17:59:55,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73534 conditions, 8220 events. 5376/8220 cut-off events. For 862929/862934 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 47958 event pairs, 1074 based on Foata normal form. 56/8275 useless extension candidates. Maximal degree in co-relation 73406. Up to 5900 conditions per place. [2024-06-21 17:59:55,876 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 337 selfloop transitions, 120 changer transitions 0/460 dead transitions. [2024-06-21 17:59:55,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 460 transitions, 8113 flow [2024-06-21 17:59:55,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:59:55,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:59:55,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-21 17:59:55,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5083333333333333 [2024-06-21 17:59:55,878 INFO L175 Difference]: Start difference. First operand has 255 places, 389 transitions, 6038 flow. Second operand 9 states and 183 transitions. [2024-06-21 17:59:55,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 460 transitions, 8113 flow [2024-06-21 17:59:57,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 460 transitions, 7954 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 17:59:57,345 INFO L231 Difference]: Finished difference. Result has 262 places, 398 transitions, 6484 flow [2024-06-21 17:59:57,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5879, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6484, PETRI_PLACES=262, PETRI_TRANSITIONS=398} [2024-06-21 17:59:57,346 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 221 predicate places. [2024-06-21 17:59:57,346 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 398 transitions, 6484 flow [2024-06-21 17:59:57,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:57,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:57,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:57,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 17:59:57,347 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:57,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:57,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1942845132, now seen corresponding path program 1 times [2024-06-21 17:59:57,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:57,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133832580] [2024-06-21 17:59:57,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:57,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:57,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:57,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:57,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:57,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133832580] [2024-06-21 17:59:57,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133832580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:57,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:57,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:57,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629957915] [2024-06-21 17:59:57,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:57,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:57,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:57,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:57,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:57,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:59:57,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 398 transitions, 6484 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:57,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:57,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:59:57,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:59,562 INFO L124 PetriNetUnfolderBase]: 5684/8648 cut-off events. [2024-06-21 17:59:59,563 INFO L125 PetriNetUnfolderBase]: For 873506/873512 co-relation queries the response was YES. [2024-06-21 17:59:59,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80024 conditions, 8648 events. 5684/8648 cut-off events. For 873506/873512 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 50423 event pairs, 1233 based on Foata normal form. 20/8667 useless extension candidates. Maximal degree in co-relation 79893. Up to 6187 conditions per place. [2024-06-21 17:59:59,678 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 273 selfloop transitions, 201 changer transitions 0/477 dead transitions. [2024-06-21 17:59:59,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 477 transitions, 8844 flow [2024-06-21 17:59:59,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:59:59,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:59:59,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 17:59:59,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49375 [2024-06-21 17:59:59,680 INFO L175 Difference]: Start difference. First operand has 262 places, 398 transitions, 6484 flow. Second operand 8 states and 158 transitions. [2024-06-21 17:59:59,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 477 transitions, 8844 flow [2024-06-21 18:00:01,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 477 transitions, 8573 flow, removed 81 selfloop flow, removed 3 redundant places. [2024-06-21 18:00:01,942 INFO L231 Difference]: Finished difference. Result has 269 places, 436 transitions, 7471 flow [2024-06-21 18:00:01,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6254, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7471, PETRI_PLACES=269, PETRI_TRANSITIONS=436} [2024-06-21 18:00:01,943 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 228 predicate places. [2024-06-21 18:00:01,943 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 436 transitions, 7471 flow [2024-06-21 18:00:01,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:01,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:01,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:01,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 18:00:01,943 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:01,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:01,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1952110722, now seen corresponding path program 2 times [2024-06-21 18:00:01,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:01,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304943389] [2024-06-21 18:00:01,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:01,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:01,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:02,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:02,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:02,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304943389] [2024-06-21 18:00:02,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304943389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:02,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:02,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:00:02,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870813196] [2024-06-21 18:00:02,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:02,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:00:02,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:02,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:00:02,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:00:02,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 18:00:02,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 436 transitions, 7471 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:02,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:02,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 18:00:02,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:04,423 INFO L124 PetriNetUnfolderBase]: 6192/9353 cut-off events. [2024-06-21 18:00:04,423 INFO L125 PetriNetUnfolderBase]: For 1014194/1014196 co-relation queries the response was YES. [2024-06-21 18:00:04,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91259 conditions, 9353 events. 6192/9353 cut-off events. For 1014194/1014196 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 54695 event pairs, 1281 based on Foata normal form. 8/9360 useless extension candidates. Maximal degree in co-relation 91125. Up to 6435 conditions per place. [2024-06-21 18:00:04,566 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 288 selfloop transitions, 228 changer transitions 0/519 dead transitions. [2024-06-21 18:00:04,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 519 transitions, 10155 flow [2024-06-21 18:00:04,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:00:04,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:00:04,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 18:00:04,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.471875 [2024-06-21 18:00:04,570 INFO L175 Difference]: Start difference. First operand has 269 places, 436 transitions, 7471 flow. Second operand 8 states and 151 transitions. [2024-06-21 18:00:04,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 519 transitions, 10155 flow [2024-06-21 18:00:08,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 519 transitions, 9939 flow, removed 91 selfloop flow, removed 3 redundant places. [2024-06-21 18:00:08,409 INFO L231 Difference]: Finished difference. Result has 276 places, 482 transitions, 8750 flow [2024-06-21 18:00:08,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7275, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8750, PETRI_PLACES=276, PETRI_TRANSITIONS=482} [2024-06-21 18:00:08,410 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 235 predicate places. [2024-06-21 18:00:08,410 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 482 transitions, 8750 flow [2024-06-21 18:00:08,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:08,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:08,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:08,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 18:00:08,411 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:08,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:08,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1952099221, now seen corresponding path program 2 times [2024-06-21 18:00:08,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:08,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786725053] [2024-06-21 18:00:08,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:08,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:08,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:09,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:09,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:09,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786725053] [2024-06-21 18:00:09,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786725053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:09,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:09,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:00:09,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334498718] [2024-06-21 18:00:09,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:09,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:00:09,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:09,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:00:09,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:00:09,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 18:00:09,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 482 transitions, 8750 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:09,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:09,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 18:00:09,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:11,510 INFO L124 PetriNetUnfolderBase]: 6165/9319 cut-off events. [2024-06-21 18:00:11,511 INFO L125 PetriNetUnfolderBase]: For 1029420/1029425 co-relation queries the response was YES. [2024-06-21 18:00:11,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92269 conditions, 9319 events. 6165/9319 cut-off events. For 1029420/1029425 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 54515 event pairs, 1326 based on Foata normal form. 19/9337 useless extension candidates. Maximal degree in co-relation 92132. Up to 7612 conditions per place. [2024-06-21 18:00:11,711 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 356 selfloop transitions, 162 changer transitions 0/521 dead transitions. [2024-06-21 18:00:11,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 521 transitions, 10659 flow [2024-06-21 18:00:11,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:00:11,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:00:11,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 18:00:11,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465625 [2024-06-21 18:00:11,713 INFO L175 Difference]: Start difference. First operand has 276 places, 482 transitions, 8750 flow. Second operand 8 states and 149 transitions. [2024-06-21 18:00:11,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 521 transitions, 10659 flow [2024-06-21 18:00:14,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 521 transitions, 10314 flow, removed 91 selfloop flow, removed 3 redundant places. [2024-06-21 18:00:14,388 INFO L231 Difference]: Finished difference. Result has 283 places, 490 transitions, 9073 flow [2024-06-21 18:00:14,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8425, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9073, PETRI_PLACES=283, PETRI_TRANSITIONS=490} [2024-06-21 18:00:14,389 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 242 predicate places. [2024-06-21 18:00:14,389 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 490 transitions, 9073 flow [2024-06-21 18:00:14,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:14,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:14,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:14,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 18:00:14,390 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:14,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:14,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1952099562, now seen corresponding path program 3 times [2024-06-21 18:00:14,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:14,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594100038] [2024-06-21 18:00:14,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:14,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:14,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:14,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:14,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:14,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594100038] [2024-06-21 18:00:14,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594100038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:14,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:14,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:00:14,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797646175] [2024-06-21 18:00:14,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:14,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:00:14,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:14,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:00:14,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:00:14,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 18:00:14,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 490 transitions, 9073 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:14,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:14,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 18:00:14,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:17,136 INFO L124 PetriNetUnfolderBase]: 6137/9287 cut-off events. [2024-06-21 18:00:17,136 INFO L125 PetriNetUnfolderBase]: For 1019182/1019184 co-relation queries the response was YES. [2024-06-21 18:00:17,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90978 conditions, 9287 events. 6137/9287 cut-off events. For 1019182/1019184 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 54336 event pairs, 1314 based on Foata normal form. 16/9302 useless extension candidates. Maximal degree in co-relation 90838. Up to 6422 conditions per place. [2024-06-21 18:00:17,332 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 293 selfloop transitions, 228 changer transitions 0/524 dead transitions. [2024-06-21 18:00:17,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 524 transitions, 10855 flow [2024-06-21 18:00:17,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:00:17,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:00:17,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 18:00:17,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-21 18:00:17,333 INFO L175 Difference]: Start difference. First operand has 283 places, 490 transitions, 9073 flow. Second operand 8 states and 152 transitions. [2024-06-21 18:00:17,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 524 transitions, 10855 flow [2024-06-21 18:00:20,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 524 transitions, 10556 flow, removed 86 selfloop flow, removed 3 redundant places. [2024-06-21 18:00:20,663 INFO L231 Difference]: Finished difference. Result has 289 places, 493 transitions, 9352 flow [2024-06-21 18:00:20,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8776, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9352, PETRI_PLACES=289, PETRI_TRANSITIONS=493} [2024-06-21 18:00:20,664 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 248 predicate places. [2024-06-21 18:00:20,665 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 493 transitions, 9352 flow [2024-06-21 18:00:20,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:20,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:20,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:20,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 18:00:20,665 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:20,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:20,666 INFO L85 PathProgramCache]: Analyzing trace with hash 2031004425, now seen corresponding path program 3 times [2024-06-21 18:00:20,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:20,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795158723] [2024-06-21 18:00:20,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:20,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:20,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:21,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:21,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:21,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795158723] [2024-06-21 18:00:21,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795158723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:21,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:21,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:00:21,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839341618] [2024-06-21 18:00:21,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:21,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:00:21,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:21,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:00:21,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:00:21,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 18:00:21,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 493 transitions, 9352 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:21,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:21,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 18:00:21,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:23,336 INFO L124 PetriNetUnfolderBase]: 6100/9231 cut-off events. [2024-06-21 18:00:23,336 INFO L125 PetriNetUnfolderBase]: For 1011012/1011012 co-relation queries the response was YES. [2024-06-21 18:00:23,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91045 conditions, 9231 events. 6100/9231 cut-off events. For 1011012/1011012 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 54064 event pairs, 1727 based on Foata normal form. 3/9233 useless extension candidates. Maximal degree in co-relation 90903. Up to 9083 conditions per place. [2024-06-21 18:00:23,490 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 473 selfloop transitions, 35 changer transitions 0/511 dead transitions. [2024-06-21 18:00:23,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 511 transitions, 10556 flow [2024-06-21 18:00:23,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:00:23,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:00:23,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-21 18:00:23,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38125 [2024-06-21 18:00:23,492 INFO L175 Difference]: Start difference. First operand has 289 places, 493 transitions, 9352 flow. Second operand 8 states and 122 transitions. [2024-06-21 18:00:23,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 511 transitions, 10556 flow [2024-06-21 18:00:26,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 511 transitions, 10167 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-21 18:00:26,467 INFO L231 Difference]: Finished difference. Result has 293 places, 493 transitions, 9042 flow [2024-06-21 18:00:26,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8963, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9042, PETRI_PLACES=293, PETRI_TRANSITIONS=493} [2024-06-21 18:00:26,468 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 252 predicate places. [2024-06-21 18:00:26,468 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 493 transitions, 9042 flow [2024-06-21 18:00:26,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:26,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:26,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:26,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 18:00:26,468 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:26,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:26,469 INFO L85 PathProgramCache]: Analyzing trace with hash -784915857, now seen corresponding path program 4 times [2024-06-21 18:00:26,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:26,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329969783] [2024-06-21 18:00:26,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:26,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:26,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:26,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:26,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:26,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329969783] [2024-06-21 18:00:26,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329969783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:26,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:26,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:00:26,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772720440] [2024-06-21 18:00:26,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:26,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:00:26,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:26,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:00:26,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:00:26,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 18:00:26,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 493 transitions, 9042 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:26,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:26,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 18:00:26,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:28,942 INFO L124 PetriNetUnfolderBase]: 6095/9224 cut-off events. [2024-06-21 18:00:28,942 INFO L125 PetriNetUnfolderBase]: For 1023890/1023890 co-relation queries the response was YES. [2024-06-21 18:00:29,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89786 conditions, 9224 events. 6095/9224 cut-off events. For 1023890/1023890 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 53989 event pairs, 1719 based on Foata normal form. 3/9226 useless extension candidates. Maximal degree in co-relation 89643. Up to 9158 conditions per place. [2024-06-21 18:00:29,088 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 482 selfloop transitions, 24 changer transitions 0/509 dead transitions. [2024-06-21 18:00:29,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 509 transitions, 10148 flow [2024-06-21 18:00:29,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:00:29,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:00:29,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-21 18:00:29,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-21 18:00:29,090 INFO L175 Difference]: Start difference. First operand has 293 places, 493 transitions, 9042 flow. Second operand 7 states and 108 transitions. [2024-06-21 18:00:29,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 509 transitions, 10148 flow [2024-06-21 18:00:32,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 509 transitions, 10000 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 18:00:32,595 INFO L231 Difference]: Finished difference. Result has 293 places, 496 transitions, 9015 flow [2024-06-21 18:00:32,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8896, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9015, PETRI_PLACES=293, PETRI_TRANSITIONS=496} [2024-06-21 18:00:32,596 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 252 predicate places. [2024-06-21 18:00:32,596 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 496 transitions, 9015 flow [2024-06-21 18:00:32,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:32,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:32,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:32,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 18:00:32,597 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:32,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:32,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1459068750, now seen corresponding path program 2 times [2024-06-21 18:00:32,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:32,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511162384] [2024-06-21 18:00:32,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:32,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:32,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:33,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:33,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:33,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511162384] [2024-06-21 18:00:33,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511162384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:33,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:33,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:00:33,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064040074] [2024-06-21 18:00:33,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:33,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:00:33,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:33,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:00:33,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:00:33,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 18:00:33,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 496 transitions, 9015 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:33,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:33,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 18:00:33,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:35,920 INFO L124 PetriNetUnfolderBase]: 6095/9225 cut-off events. [2024-06-21 18:00:35,920 INFO L125 PetriNetUnfolderBase]: For 1057710/1057716 co-relation queries the response was YES. [2024-06-21 18:00:36,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89211 conditions, 9225 events. 6095/9225 cut-off events. For 1057710/1057716 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 53962 event pairs, 1701 based on Foata normal form. 24/9248 useless extension candidates. Maximal degree in co-relation 89067. Up to 8940 conditions per place. [2024-06-21 18:00:36,106 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 495 selfloop transitions, 37 changer transitions 0/535 dead transitions. [2024-06-21 18:00:36,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 535 transitions, 10306 flow [2024-06-21 18:00:36,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:00:36,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:00:36,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-21 18:00:36,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41388888888888886 [2024-06-21 18:00:36,107 INFO L175 Difference]: Start difference. First operand has 293 places, 496 transitions, 9015 flow. Second operand 9 states and 149 transitions. [2024-06-21 18:00:36,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 535 transitions, 10306 flow [2024-06-21 18:00:39,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 535 transitions, 10231 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 18:00:39,691 INFO L231 Difference]: Finished difference. Result has 298 places, 503 transitions, 9186 flow [2024-06-21 18:00:39,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8940, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9186, PETRI_PLACES=298, PETRI_TRANSITIONS=503} [2024-06-21 18:00:39,692 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 257 predicate places. [2024-06-21 18:00:39,692 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 503 transitions, 9186 flow [2024-06-21 18:00:39,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:39,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:39,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:39,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 18:00:39,693 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:39,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:39,694 INFO L85 PathProgramCache]: Analyzing trace with hash 37916010, now seen corresponding path program 3 times [2024-06-21 18:00:39,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:39,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524832824] [2024-06-21 18:00:39,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:39,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:39,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:40,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:40,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:40,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524832824] [2024-06-21 18:00:40,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524832824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:40,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:40,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:00:40,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544920235] [2024-06-21 18:00:40,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:40,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:00:40,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:40,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:00:40,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:00:40,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 18:00:40,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 503 transitions, 9186 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:40,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:40,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 18:00:40,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:42,962 INFO L124 PetriNetUnfolderBase]: 6156/9328 cut-off events. [2024-06-21 18:00:42,962 INFO L125 PetriNetUnfolderBase]: For 1104224/1104230 co-relation queries the response was YES. [2024-06-21 18:00:43,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90784 conditions, 9328 events. 6156/9328 cut-off events. For 1104224/1104230 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 54684 event pairs, 1667 based on Foata normal form. 24/9351 useless extension candidates. Maximal degree in co-relation 90637. Up to 9074 conditions per place. [2024-06-21 18:00:43,140 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 499 selfloop transitions, 35 changer transitions 0/537 dead transitions. [2024-06-21 18:00:43,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 537 transitions, 10454 flow [2024-06-21 18:00:43,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:00:43,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:00:43,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-21 18:00:43,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111111111111111 [2024-06-21 18:00:43,141 INFO L175 Difference]: Start difference. First operand has 298 places, 503 transitions, 9186 flow. Second operand 9 states and 148 transitions. [2024-06-21 18:00:43,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 537 transitions, 10454 flow [2024-06-21 18:00:46,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 537 transitions, 10291 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-21 18:00:47,006 INFO L231 Difference]: Finished difference. Result has 302 places, 505 transitions, 9218 flow [2024-06-21 18:00:47,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9023, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9218, PETRI_PLACES=302, PETRI_TRANSITIONS=505} [2024-06-21 18:00:47,007 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 261 predicate places. [2024-06-21 18:00:47,007 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 505 transitions, 9218 flow [2024-06-21 18:00:47,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:47,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:47,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:47,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 18:00:47,008 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:47,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:47,008 INFO L85 PathProgramCache]: Analyzing trace with hash -247421196, now seen corresponding path program 1 times [2024-06-21 18:00:47,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:47,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561090350] [2024-06-21 18:00:47,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:47,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:47,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:47,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:47,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:47,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561090350] [2024-06-21 18:00:47,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561090350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:47,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:47,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:00:47,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650850276] [2024-06-21 18:00:47,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:47,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:00:47,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:47,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:00:47,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:00:47,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 18:00:47,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 505 transitions, 9218 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:47,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:47,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 18:00:47,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:50,312 INFO L124 PetriNetUnfolderBase]: 6217/9431 cut-off events. [2024-06-21 18:00:50,313 INFO L125 PetriNetUnfolderBase]: For 1133363/1133369 co-relation queries the response was YES. [2024-06-21 18:00:50,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91309 conditions, 9431 events. 6217/9431 cut-off events. For 1133363/1133369 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 55660 event pairs, 1737 based on Foata normal form. 30/9460 useless extension candidates. Maximal degree in co-relation 91161. Up to 8872 conditions per place. [2024-06-21 18:00:50,494 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 482 selfloop transitions, 56 changer transitions 0/541 dead transitions. [2024-06-21 18:00:50,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 541 transitions, 10520 flow [2024-06-21 18:00:50,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:00:50,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:00:50,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 18:00:50,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-21 18:00:50,495 INFO L175 Difference]: Start difference. First operand has 302 places, 505 transitions, 9218 flow. Second operand 9 states and 154 transitions. [2024-06-21 18:00:50,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 541 transitions, 10520 flow [2024-06-21 18:00:55,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 541 transitions, 10349 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-21 18:00:55,158 INFO L231 Difference]: Finished difference. Result has 304 places, 507 transitions, 9299 flow [2024-06-21 18:00:55,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9047, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9299, PETRI_PLACES=304, PETRI_TRANSITIONS=507} [2024-06-21 18:00:55,158 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 263 predicate places. [2024-06-21 18:00:55,159 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 507 transitions, 9299 flow [2024-06-21 18:00:55,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:55,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:55,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:55,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 18:00:55,159 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:55,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:55,160 INFO L85 PathProgramCache]: Analyzing trace with hash -247183860, now seen corresponding path program 4 times [2024-06-21 18:00:55,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:55,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578424289] [2024-06-21 18:00:55,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:55,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:55,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:56,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:56,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:56,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578424289] [2024-06-21 18:00:56,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578424289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:56,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:56,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:00:56,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068863700] [2024-06-21 18:00:56,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:56,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:00:56,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:56,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:00:56,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:00:56,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 18:00:56,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 507 transitions, 9299 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:56,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:56,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 18:00:56,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:58,542 INFO L124 PetriNetUnfolderBase]: 6217/9431 cut-off events. [2024-06-21 18:00:58,543 INFO L125 PetriNetUnfolderBase]: For 1124187/1124193 co-relation queries the response was YES. [2024-06-21 18:00:58,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90512 conditions, 9431 events. 6217/9431 cut-off events. For 1124187/1124193 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 55556 event pairs, 1687 based on Foata normal form. 24/9454 useless extension candidates. Maximal degree in co-relation 90363. Up to 8933 conditions per place. [2024-06-21 18:00:58,699 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 476 selfloop transitions, 60 changer transitions 0/539 dead transitions. [2024-06-21 18:00:58,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 539 transitions, 10389 flow [2024-06-21 18:00:58,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:00:58,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:00:58,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 18:00:58,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 18:00:58,701 INFO L175 Difference]: Start difference. First operand has 304 places, 507 transitions, 9299 flow. Second operand 9 states and 150 transitions. [2024-06-21 18:00:58,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 539 transitions, 10389 flow [2024-06-21 18:01:03,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 539 transitions, 10199 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-21 18:01:03,347 INFO L231 Difference]: Finished difference. Result has 305 places, 507 transitions, 9169 flow [2024-06-21 18:01:03,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9007, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9169, PETRI_PLACES=305, PETRI_TRANSITIONS=507} [2024-06-21 18:01:03,348 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 264 predicate places. [2024-06-21 18:01:03,348 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 507 transitions, 9169 flow [2024-06-21 18:01:03,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:03,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:03,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:01:03,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 18:01:03,349 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:03,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:03,350 INFO L85 PathProgramCache]: Analyzing trace with hash -772333013, now seen corresponding path program 5 times [2024-06-21 18:01:03,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:03,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259932788] [2024-06-21 18:01:03,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:03,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:03,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:03,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:01:03,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:03,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259932788] [2024-06-21 18:01:03,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259932788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:03,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:03,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:01:03,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121991757] [2024-06-21 18:01:03,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:03,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:01:03,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:03,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:01:03,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:01:03,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 18:01:03,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 507 transitions, 9169 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:03,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:03,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 18:01:03,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:05,808 INFO L124 PetriNetUnfolderBase]: 6207/9417 cut-off events. [2024-06-21 18:01:05,809 INFO L125 PetriNetUnfolderBase]: For 1100632/1100634 co-relation queries the response was YES. [2024-06-21 18:01:05,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90062 conditions, 9417 events. 6207/9417 cut-off events. For 1100632/1100634 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 55545 event pairs, 1751 based on Foata normal form. 3/9419 useless extension candidates. Maximal degree in co-relation 89912. Up to 9355 conditions per place. [2024-06-21 18:01:05,969 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 489 selfloop transitions, 24 changer transitions 0/516 dead transitions. [2024-06-21 18:01:05,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 516 transitions, 10217 flow [2024-06-21 18:01:05,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:01:05,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:01:05,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 103 transitions. [2024-06-21 18:01:05,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3678571428571429 [2024-06-21 18:01:05,971 INFO L175 Difference]: Start difference. First operand has 305 places, 507 transitions, 9169 flow. Second operand 7 states and 103 transitions. [2024-06-21 18:01:05,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 516 transitions, 10217 flow [2024-06-21 18:01:10,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 516 transitions, 9953 flow, removed 58 selfloop flow, removed 8 redundant places. [2024-06-21 18:01:10,949 INFO L231 Difference]: Finished difference. Result has 304 places, 507 transitions, 8959 flow [2024-06-21 18:01:10,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8905, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8959, PETRI_PLACES=304, PETRI_TRANSITIONS=507} [2024-06-21 18:01:10,950 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 263 predicate places. [2024-06-21 18:01:10,950 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 507 transitions, 8959 flow [2024-06-21 18:01:10,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:10,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:10,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:01:10,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 18:01:10,951 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:10,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:10,951 INFO L85 PathProgramCache]: Analyzing trace with hash -772100473, now seen corresponding path program 6 times [2024-06-21 18:01:10,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:10,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44057444] [2024-06-21 18:01:10,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:10,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:10,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:11,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:01:11,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:11,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44057444] [2024-06-21 18:01:11,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44057444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:11,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:11,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:01:11,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657843351] [2024-06-21 18:01:11,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:11,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:01:11,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:11,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:01:11,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:01:11,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 18:01:11,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 507 transitions, 8959 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:11,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:11,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 18:01:11,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:13,529 INFO L124 PetriNetUnfolderBase]: 6127/9286 cut-off events. [2024-06-21 18:01:13,529 INFO L125 PetriNetUnfolderBase]: For 1104013/1104015 co-relation queries the response was YES. [2024-06-21 18:01:13,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87984 conditions, 9286 events. 6127/9286 cut-off events. For 1104013/1104015 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 54530 event pairs, 1739 based on Foata normal form. 4/9289 useless extension candidates. Maximal degree in co-relation 87834. Up to 9188 conditions per place. [2024-06-21 18:01:13,665 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 478 selfloop transitions, 36 changer transitions 0/517 dead transitions. [2024-06-21 18:01:13,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 517 transitions, 10013 flow [2024-06-21 18:01:13,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:01:13,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:01:13,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-21 18:01:13,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-21 18:01:13,666 INFO L175 Difference]: Start difference. First operand has 304 places, 507 transitions, 8959 flow. Second operand 7 states and 108 transitions. [2024-06-21 18:01:13,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 517 transitions, 10013 flow [2024-06-21 18:01:17,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 517 transitions, 9912 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 18:01:17,137 INFO L231 Difference]: Finished difference. Result has 304 places, 507 transitions, 8938 flow [2024-06-21 18:01:17,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8858, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8938, PETRI_PLACES=304, PETRI_TRANSITIONS=507} [2024-06-21 18:01:17,138 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 263 predicate places. [2024-06-21 18:01:17,138 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 507 transitions, 8938 flow [2024-06-21 18:01:17,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:17,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:17,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:01:17,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 18:01:17,139 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:17,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:17,139 INFO L85 PathProgramCache]: Analyzing trace with hash -758760057, now seen corresponding path program 1 times [2024-06-21 18:01:17,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:17,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775575978] [2024-06-21 18:01:17,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:17,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:17,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:17,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:01:17,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:17,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775575978] [2024-06-21 18:01:17,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775575978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:17,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:17,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:01:17,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353138486] [2024-06-21 18:01:17,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:17,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:01:17,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:17,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:01:17,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:01:17,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 18:01:17,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 507 transitions, 8938 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:17,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:17,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 18:01:17,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:20,960 INFO L124 PetriNetUnfolderBase]: 6124/9280 cut-off events. [2024-06-21 18:01:20,960 INFO L125 PetriNetUnfolderBase]: For 1127093/1127093 co-relation queries the response was YES. [2024-06-21 18:01:21,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88205 conditions, 9280 events. 6124/9280 cut-off events. For 1127093/1127093 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 54547 event pairs, 1732 based on Foata normal form. 1/9280 useless extension candidates. Maximal degree in co-relation 88054. Up to 9240 conditions per place. [2024-06-21 18:01:21,178 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 494 selfloop transitions, 20 changer transitions 0/517 dead transitions. [2024-06-21 18:01:21,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 517 transitions, 9992 flow [2024-06-21 18:01:21,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:01:21,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:01:21,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 100 transitions. [2024-06-21 18:01:21,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-21 18:01:21,180 INFO L175 Difference]: Start difference. First operand has 304 places, 507 transitions, 8938 flow. Second operand 7 states and 100 transitions. [2024-06-21 18:01:21,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 517 transitions, 9992 flow [2024-06-21 18:01:25,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 517 transitions, 9809 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 18:01:25,728 INFO L231 Difference]: Finished difference. Result has 303 places, 507 transitions, 8805 flow [2024-06-21 18:01:25,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8755, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8805, PETRI_PLACES=303, PETRI_TRANSITIONS=507} [2024-06-21 18:01:25,730 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 262 predicate places. [2024-06-21 18:01:25,730 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 507 transitions, 8805 flow [2024-06-21 18:01:25,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:25,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:25,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:01:25,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 18:01:25,731 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:25,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:25,731 INFO L85 PathProgramCache]: Analyzing trace with hash -772104100, now seen corresponding path program 4 times [2024-06-21 18:01:25,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:25,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915354829] [2024-06-21 18:01:25,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:25,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:25,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:26,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:01:26,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:26,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915354829] [2024-06-21 18:01:26,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915354829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:26,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:26,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:01:26,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762818499] [2024-06-21 18:01:26,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:26,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:01:26,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:26,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:01:26,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:01:26,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 18:01:26,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 507 transitions, 8805 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:26,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:26,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 18:01:26,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:29,250 INFO L124 PetriNetUnfolderBase]: 6288/9512 cut-off events. [2024-06-21 18:01:29,250 INFO L125 PetriNetUnfolderBase]: For 1197345/1197347 co-relation queries the response was YES. [2024-06-21 18:01:29,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90345 conditions, 9512 events. 6288/9512 cut-off events. For 1197345/1197347 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 55938 event pairs, 1718 based on Foata normal form. 16/9527 useless extension candidates. Maximal degree in co-relation 90193. Up to 8904 conditions per place. [2024-06-21 18:01:29,506 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 456 selfloop transitions, 97 changer transitions 0/556 dead transitions. [2024-06-21 18:01:29,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 556 transitions, 10982 flow [2024-06-21 18:01:29,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:01:29,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:01:29,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 18:01:29,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-21 18:01:29,508 INFO L175 Difference]: Start difference. First operand has 303 places, 507 transitions, 8805 flow. Second operand 8 states and 141 transitions. [2024-06-21 18:01:29,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 556 transitions, 10982 flow [2024-06-21 18:01:34,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 556 transitions, 10926 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 18:01:34,896 INFO L231 Difference]: Finished difference. Result has 307 places, 532 transitions, 9588 flow [2024-06-21 18:01:34,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8755, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9588, PETRI_PLACES=307, PETRI_TRANSITIONS=532} [2024-06-21 18:01:34,897 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 266 predicate places. [2024-06-21 18:01:34,897 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 532 transitions, 9588 flow [2024-06-21 18:01:34,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:34,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:34,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:01:34,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 18:01:34,898 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:34,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:34,898 INFO L85 PathProgramCache]: Analyzing trace with hash -759205930, now seen corresponding path program 5 times [2024-06-21 18:01:34,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:34,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104216966] [2024-06-21 18:01:34,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:34,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:34,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:35,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:01:35,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:35,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104216966] [2024-06-21 18:01:35,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104216966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:35,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:35,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:01:35,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972558213] [2024-06-21 18:01:35,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:35,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:01:35,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:35,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:01:35,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:01:35,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 18:01:35,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 532 transitions, 9588 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:35,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:35,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 18:01:35,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:38,615 INFO L124 PetriNetUnfolderBase]: 6425/9703 cut-off events. [2024-06-21 18:01:38,615 INFO L125 PetriNetUnfolderBase]: For 1212679/1212681 co-relation queries the response was YES. [2024-06-21 18:01:38,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94157 conditions, 9703 events. 6425/9703 cut-off events. For 1212679/1212681 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 57082 event pairs, 1757 based on Foata normal form. 8/9710 useless extension candidates. Maximal degree in co-relation 94002. Up to 9428 conditions per place. [2024-06-21 18:01:38,945 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 507 selfloop transitions, 64 changer transitions 0/574 dead transitions. [2024-06-21 18:01:38,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 574 transitions, 11527 flow [2024-06-21 18:01:38,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:01:38,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:01:38,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 18:01:38,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-21 18:01:38,946 INFO L175 Difference]: Start difference. First operand has 307 places, 532 transitions, 9588 flow. Second operand 8 states and 134 transitions. [2024-06-21 18:01:38,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 574 transitions, 11527 flow [2024-06-21 18:01:44,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 574 transitions, 11043 flow, removed 126 selfloop flow, removed 6 redundant places. [2024-06-21 18:01:44,885 INFO L231 Difference]: Finished difference. Result has 311 places, 554 transitions, 9727 flow [2024-06-21 18:01:44,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9150, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9727, PETRI_PLACES=311, PETRI_TRANSITIONS=554} [2024-06-21 18:01:44,886 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 270 predicate places. [2024-06-21 18:01:44,886 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 554 transitions, 9727 flow [2024-06-21 18:01:44,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:44,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:44,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:01:44,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 18:01:44,887 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:44,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:44,887 INFO L85 PathProgramCache]: Analyzing trace with hash -772104441, now seen corresponding path program 3 times [2024-06-21 18:01:44,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:44,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683742094] [2024-06-21 18:01:44,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:44,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:44,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:45,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:01:45,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:45,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683742094] [2024-06-21 18:01:45,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683742094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:45,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:45,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:01:45,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936346250] [2024-06-21 18:01:45,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:45,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:01:45,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:45,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:01:45,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:01:45,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 18:01:45,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 554 transitions, 9727 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:45,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:45,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 18:01:45,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:48,645 INFO L124 PetriNetUnfolderBase]: 6388/9654 cut-off events. [2024-06-21 18:01:48,645 INFO L125 PetriNetUnfolderBase]: For 1211241/1211243 co-relation queries the response was YES. [2024-06-21 18:01:48,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92797 conditions, 9654 events. 6388/9654 cut-off events. For 1211241/1211243 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 56832 event pairs, 1714 based on Foata normal form. 13/9666 useless extension candidates. Maximal degree in co-relation 92641. Up to 9034 conditions per place. [2024-06-21 18:01:48,846 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 472 selfloop transitions, 103 changer transitions 0/578 dead transitions. [2024-06-21 18:01:48,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 578 transitions, 11467 flow [2024-06-21 18:01:48,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:01:48,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:01:48,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 18:01:48,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-21 18:01:48,847 INFO L175 Difference]: Start difference. First operand has 311 places, 554 transitions, 9727 flow. Second operand 8 states and 139 transitions. [2024-06-21 18:01:48,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 578 transitions, 11467 flow [2024-06-21 18:01:53,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 578 transitions, 11289 flow, removed 59 selfloop flow, removed 3 redundant places. [2024-06-21 18:01:53,033 INFO L231 Difference]: Finished difference. Result has 317 places, 555 transitions, 9840 flow [2024-06-21 18:01:53,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9559, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9840, PETRI_PLACES=317, PETRI_TRANSITIONS=555} [2024-06-21 18:01:53,034 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 276 predicate places. [2024-06-21 18:01:53,034 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 555 transitions, 9840 flow [2024-06-21 18:01:53,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:53,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:53,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:01:53,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 18:01:53,035 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:53,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:53,035 INFO L85 PathProgramCache]: Analyzing trace with hash -772092940, now seen corresponding path program 6 times [2024-06-21 18:01:53,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:53,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226410606] [2024-06-21 18:01:53,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:53,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:53,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:53,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:01:53,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:53,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226410606] [2024-06-21 18:01:53,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226410606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:53,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:53,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:01:53,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82516080] [2024-06-21 18:01:53,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:53,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:01:53,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:53,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:01:53,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:01:53,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 18:01:53,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 555 transitions, 9840 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:53,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:53,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 18:01:53,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:55,883 INFO L124 PetriNetUnfolderBase]: 6462/9758 cut-off events. [2024-06-21 18:01:55,883 INFO L125 PetriNetUnfolderBase]: For 1235784/1235786 co-relation queries the response was YES. [2024-06-21 18:01:55,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94402 conditions, 9758 events. 6462/9758 cut-off events. For 1235784/1235786 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 57441 event pairs, 1747 based on Foata normal form. 8/9765 useless extension candidates. Maximal degree in co-relation 94244. Up to 8994 conditions per place. [2024-06-21 18:01:56,046 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 470 selfloop transitions, 119 changer transitions 0/592 dead transitions. [2024-06-21 18:01:56,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 592 transitions, 11961 flow [2024-06-21 18:01:56,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:01:56,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:01:56,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 18:01:56,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 18:01:56,047 INFO L175 Difference]: Start difference. First operand has 317 places, 555 transitions, 9840 flow. Second operand 8 states and 140 transitions. [2024-06-21 18:01:56,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 592 transitions, 11961 flow [2024-06-21 18:02:00,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 592 transitions, 11714 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-21 18:02:00,533 INFO L231 Difference]: Finished difference. Result has 322 places, 569 transitions, 10267 flow [2024-06-21 18:02:00,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9622, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10267, PETRI_PLACES=322, PETRI_TRANSITIONS=569} [2024-06-21 18:02:00,535 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 281 predicate places. [2024-06-21 18:02:00,535 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 569 transitions, 10267 flow [2024-06-21 18:02:00,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:00,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:02:00,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:02:00,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 18:02:00,536 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:02:00,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:02:00,536 INFO L85 PathProgramCache]: Analyzing trace with hash 165420145, now seen corresponding path program 4 times [2024-06-21 18:02:00,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:02:00,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904972052] [2024-06-21 18:02:00,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:02:00,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:02:00,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:02:01,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:02:01,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:02:01,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904972052] [2024-06-21 18:02:01,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904972052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:02:01,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:02:01,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:02:01,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320033224] [2024-06-21 18:02:01,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:02:01,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:02:01,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:02:01,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:02:01,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:02:01,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 18:02:01,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 569 transitions, 10267 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:01,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:02:01,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 18:02:01,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:02:05,473 INFO L124 PetriNetUnfolderBase]: 7215/10821 cut-off events. [2024-06-21 18:02:05,474 INFO L125 PetriNetUnfolderBase]: For 1403613/1403625 co-relation queries the response was YES. [2024-06-21 18:02:05,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107824 conditions, 10821 events. 7215/10821 cut-off events. For 1403613/1403625 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 63958 event pairs, 1409 based on Foata normal form. 13/10833 useless extension candidates. Maximal degree in co-relation 107664. Up to 9267 conditions per place. [2024-06-21 18:02:05,785 INFO L140 encePairwiseOnDemand]: 23/40 looper letters, 597 selfloop transitions, 238 changer transitions 0/838 dead transitions. [2024-06-21 18:02:05,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 838 transitions, 17602 flow [2024-06-21 18:02:05,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:02:05,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:02:05,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-21 18:02:05,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49722222222222223 [2024-06-21 18:02:05,789 INFO L175 Difference]: Start difference. First operand has 322 places, 569 transitions, 10267 flow. Second operand 9 states and 179 transitions. [2024-06-21 18:02:05,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 838 transitions, 17602 flow [2024-06-21 18:02:10,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 838 transitions, 17261 flow, removed 97 selfloop flow, removed 4 redundant places. [2024-06-21 18:02:10,427 INFO L231 Difference]: Finished difference. Result has 331 places, 735 transitions, 14556 flow [2024-06-21 18:02:10,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10022, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14556, PETRI_PLACES=331, PETRI_TRANSITIONS=735} [2024-06-21 18:02:10,429 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 290 predicate places. [2024-06-21 18:02:10,429 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 735 transitions, 14556 flow [2024-06-21 18:02:10,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:10,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:02:10,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:02:10,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 18:02:10,429 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:02:10,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:02:10,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1052777929, now seen corresponding path program 5 times [2024-06-21 18:02:10,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:02:10,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698649241] [2024-06-21 18:02:10,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:02:10,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:02:10,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:02:11,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:02:11,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:02:11,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698649241] [2024-06-21 18:02:11,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698649241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:02:11,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:02:11,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:02:11,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165887946] [2024-06-21 18:02:11,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:02:11,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:02:11,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:02:11,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:02:11,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:02:11,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 18:02:11,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 735 transitions, 14556 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:11,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:02:11,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 18:02:11,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:02:15,774 INFO L124 PetriNetUnfolderBase]: 7620/11398 cut-off events. [2024-06-21 18:02:15,775 INFO L125 PetriNetUnfolderBase]: For 1452229/1452238 co-relation queries the response was YES. [2024-06-21 18:02:15,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119578 conditions, 11398 events. 7620/11398 cut-off events. For 1452229/1452238 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 67473 event pairs, 1490 based on Foata normal form. 16/11413 useless extension candidates. Maximal degree in co-relation 119413. Up to 10141 conditions per place. [2024-06-21 18:02:16,066 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 683 selfloop transitions, 240 changer transitions 0/926 dead transitions. [2024-06-21 18:02:16,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 926 transitions, 20100 flow [2024-06-21 18:02:16,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:02:16,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:02:16,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-21 18:02:16,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 18:02:16,068 INFO L175 Difference]: Start difference. First operand has 331 places, 735 transitions, 14556 flow. Second operand 10 states and 175 transitions. [2024-06-21 18:02:16,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 926 transitions, 20100 flow [2024-06-21 18:02:21,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 926 transitions, 19921 flow, removed 74 selfloop flow, removed 2 redundant places. [2024-06-21 18:02:21,634 INFO L231 Difference]: Finished difference. Result has 344 places, 860 transitions, 18386 flow [2024-06-21 18:02:21,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14427, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18386, PETRI_PLACES=344, PETRI_TRANSITIONS=860} [2024-06-21 18:02:21,635 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 303 predicate places. [2024-06-21 18:02:21,635 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 860 transitions, 18386 flow [2024-06-21 18:02:21,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:21,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:02:21,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:02:21,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 18:02:21,636 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:02:21,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:02:21,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1234075563, now seen corresponding path program 6 times [2024-06-21 18:02:21,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:02:21,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515882601] [2024-06-21 18:02:21,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:02:21,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:02:21,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:02:22,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:02:22,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:02:22,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515882601] [2024-06-21 18:02:22,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515882601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:02:22,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:02:22,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:02:22,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260923450] [2024-06-21 18:02:22,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:02:22,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:02:22,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:02:22,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:02:22,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:02:22,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 18:02:22,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 860 transitions, 18386 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:22,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:02:22,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 18:02:22,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:02:26,899 INFO L124 PetriNetUnfolderBase]: 7526/11432 cut-off events. [2024-06-21 18:02:26,899 INFO L125 PetriNetUnfolderBase]: For 1507527/1507547 co-relation queries the response was YES. [2024-06-21 18:02:27,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122178 conditions, 11432 events. 7526/11432 cut-off events. For 1507527/1507547 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 69842 event pairs, 1333 based on Foata normal form. 19/11426 useless extension candidates. Maximal degree in co-relation 122006. Up to 6628 conditions per place. [2024-06-21 18:02:27,136 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 354 selfloop transitions, 485 changer transitions 0/974 dead transitions. [2024-06-21 18:02:27,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 974 transitions, 22692 flow [2024-06-21 18:02:27,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:02:27,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:02:27,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-21 18:02:27,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515625 [2024-06-21 18:02:27,138 INFO L175 Difference]: Start difference. First operand has 344 places, 860 transitions, 18386 flow. Second operand 8 states and 165 transitions. [2024-06-21 18:02:27,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 974 transitions, 22692 flow [2024-06-21 18:02:34,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 974 transitions, 22526 flow, removed 75 selfloop flow, removed 2 redundant places. [2024-06-21 18:02:34,670 INFO L231 Difference]: Finished difference. Result has 352 places, 927 transitions, 21198 flow [2024-06-21 18:02:34,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=18252, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=860, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=418, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=21198, PETRI_PLACES=352, PETRI_TRANSITIONS=927} [2024-06-21 18:02:34,671 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 311 predicate places. [2024-06-21 18:02:34,671 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 927 transitions, 21198 flow [2024-06-21 18:02:34,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:34,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:02:34,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:02:34,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 18:02:34,672 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:02:34,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:02:34,673 INFO L85 PathProgramCache]: Analyzing trace with hash -850264570, now seen corresponding path program 1 times [2024-06-21 18:02:34,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:02:34,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470844321] [2024-06-21 18:02:34,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:02:34,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:02:34,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:02:35,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:02:35,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:02:35,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470844321] [2024-06-21 18:02:35,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470844321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:02:35,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:02:35,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:02:35,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066607266] [2024-06-21 18:02:35,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:02:35,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:02:35,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:02:35,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:02:35,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:02:35,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 18:02:35,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 927 transitions, 21198 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:35,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:02:35,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 18:02:35,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:02:39,218 INFO L124 PetriNetUnfolderBase]: 7903/11813 cut-off events. [2024-06-21 18:02:39,219 INFO L125 PetriNetUnfolderBase]: For 1517864/1517864 co-relation queries the response was YES. [2024-06-21 18:02:39,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130510 conditions, 11813 events. 7903/11813 cut-off events. For 1517864/1517864 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 70144 event pairs, 1797 based on Foata normal form. 4/11816 useless extension candidates. Maximal degree in co-relation 130334. Up to 11615 conditions per place. [2024-06-21 18:02:39,399 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 899 selfloop transitions, 50 changer transitions 0/952 dead transitions. [2024-06-21 18:02:39,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 952 transitions, 23435 flow [2024-06-21 18:02:39,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:02:39,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:02:39,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 18:02:39,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 18:02:39,401 INFO L175 Difference]: Start difference. First operand has 352 places, 927 transitions, 21198 flow. Second operand 7 states and 119 transitions. [2024-06-21 18:02:39,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 952 transitions, 23435 flow [2024-06-21 18:02:45,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 952 transitions, 22805 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-21 18:02:45,637 INFO L231 Difference]: Finished difference. Result has 355 places, 930 transitions, 20734 flow [2024-06-21 18:02:45,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=20574, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=927, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=880, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=20734, PETRI_PLACES=355, PETRI_TRANSITIONS=930} [2024-06-21 18:02:45,653 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 314 predicate places. [2024-06-21 18:02:45,653 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 930 transitions, 20734 flow [2024-06-21 18:02:45,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:45,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:02:45,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:02:45,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 18:02:45,653 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:02:45,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:02:45,654 INFO L85 PathProgramCache]: Analyzing trace with hash -784902186, now seen corresponding path program 2 times [2024-06-21 18:02:45,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:02:45,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430087392] [2024-06-21 18:02:45,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:02:45,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:02:45,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:02:46,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:02:46,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:02:46,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430087392] [2024-06-21 18:02:46,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430087392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:02:46,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:02:46,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:02:46,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247929256] [2024-06-21 18:02:46,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:02:46,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:02:46,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:02:46,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:02:46,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:02:46,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 18:02:46,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 930 transitions, 20734 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:46,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:02:46,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 18:02:46,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:02:50,196 INFO L124 PetriNetUnfolderBase]: 7923/11841 cut-off events. [2024-06-21 18:02:50,197 INFO L125 PetriNetUnfolderBase]: For 1538549/1538549 co-relation queries the response was YES. [2024-06-21 18:02:50,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129056 conditions, 11841 events. 7923/11841 cut-off events. For 1538549/1538549 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 70345 event pairs, 1783 based on Foata normal form. 4/11844 useless extension candidates. Maximal degree in co-relation 128879. Up to 11631 conditions per place. [2024-06-21 18:02:50,545 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 901 selfloop transitions, 49 changer transitions 0/953 dead transitions. [2024-06-21 18:02:50,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 953 transitions, 22968 flow [2024-06-21 18:02:50,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:02:50,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:02:50,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-21 18:02:50,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 18:02:50,547 INFO L175 Difference]: Start difference. First operand has 355 places, 930 transitions, 20734 flow. Second operand 7 states and 115 transitions. [2024-06-21 18:02:50,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 953 transitions, 22968 flow [2024-06-21 18:02:57,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 953 transitions, 22815 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 18:02:57,201 INFO L231 Difference]: Finished difference. Result has 356 places, 933 transitions, 20747 flow [2024-06-21 18:02:57,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=20590, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=930, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=884, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=20747, PETRI_PLACES=356, PETRI_TRANSITIONS=933} [2024-06-21 18:02:57,202 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 315 predicate places. [2024-06-21 18:02:57,202 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 933 transitions, 20747 flow [2024-06-21 18:02:57,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:57,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:02:57,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:02:57,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 18:02:57,203 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:02:57,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:02:57,203 INFO L85 PathProgramCache]: Analyzing trace with hash -764967692, now seen corresponding path program 3 times [2024-06-21 18:02:57,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:02:57,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168533623] [2024-06-21 18:02:57,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:02:57,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:02:57,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:02:57,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:02:57,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:02:57,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168533623] [2024-06-21 18:02:57,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168533623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:02:57,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:02:57,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:02:57,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118004519] [2024-06-21 18:02:57,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:02:57,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:02:57,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:02:57,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:02:57,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:02:57,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 18:02:57,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 933 transitions, 20747 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:57,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:02:57,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 18:02:57,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:03:01,641 INFO L124 PetriNetUnfolderBase]: 7911/11827 cut-off events. [2024-06-21 18:03:01,642 INFO L125 PetriNetUnfolderBase]: For 1555278/1555280 co-relation queries the response was YES. [2024-06-21 18:03:01,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128902 conditions, 11827 events. 7911/11827 cut-off events. For 1555278/1555280 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 70277 event pairs, 1797 based on Foata normal form. 4/11830 useless extension candidates. Maximal degree in co-relation 128725. Up to 11623 conditions per place. [2024-06-21 18:03:01,829 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 898 selfloop transitions, 46 changer transitions 0/947 dead transitions. [2024-06-21 18:03:01,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 947 transitions, 22706 flow [2024-06-21 18:03:01,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:03:01,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:03:01,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-21 18:03:01,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3892857142857143 [2024-06-21 18:03:01,830 INFO L175 Difference]: Start difference. First operand has 356 places, 933 transitions, 20747 flow. Second operand 7 states and 109 transitions. [2024-06-21 18:03:01,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 947 transitions, 22706 flow [2024-06-21 18:03:07,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 947 transitions, 22612 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 18:03:07,896 INFO L231 Difference]: Finished difference. Result has 359 places, 933 transitions, 20752 flow [2024-06-21 18:03:07,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=20653, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=933, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=887, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=20752, PETRI_PLACES=359, PETRI_TRANSITIONS=933} [2024-06-21 18:03:07,897 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 318 predicate places. [2024-06-21 18:03:07,897 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 933 transitions, 20752 flow [2024-06-21 18:03:07,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:07,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:03:07,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:03:07,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 18:03:07,897 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:03:07,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:03:07,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1446787345, now seen corresponding path program 1 times [2024-06-21 18:03:07,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:03:07,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512488186] [2024-06-21 18:03:07,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:03:07,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:03:07,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:03:08,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:03:08,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:03:08,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512488186] [2024-06-21 18:03:08,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512488186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:03:08,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:03:08,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:03:08,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396467802] [2024-06-21 18:03:08,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:03:08,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:03:08,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:03:08,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:03:08,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:03:08,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 18:03:08,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 933 transitions, 20752 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:08,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:03:08,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 18:03:08,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:03:12,441 INFO L124 PetriNetUnfolderBase]: 7949/11885 cut-off events. [2024-06-21 18:03:12,441 INFO L125 PetriNetUnfolderBase]: For 1613092/1613094 co-relation queries the response was YES. [2024-06-21 18:03:12,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129085 conditions, 11885 events. 7949/11885 cut-off events. For 1613092/1613094 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 70702 event pairs, 1554 based on Foata normal form. 18/11902 useless extension candidates. Maximal degree in co-relation 128907. Up to 7262 conditions per place. [2024-06-21 18:03:12,657 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 544 selfloop transitions, 443 changer transitions 0/990 dead transitions. [2024-06-21 18:03:12,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 990 transitions, 23811 flow [2024-06-21 18:03:12,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:03:12,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:03:12,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 18:03:12,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478125 [2024-06-21 18:03:12,658 INFO L175 Difference]: Start difference. First operand has 359 places, 933 transitions, 20752 flow. Second operand 8 states and 153 transitions. [2024-06-21 18:03:12,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 990 transitions, 23811 flow [2024-06-21 18:03:19,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 990 transitions, 23673 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 18:03:19,487 INFO L231 Difference]: Finished difference. Result has 361 places, 951 transitions, 21920 flow [2024-06-21 18:03:19,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=20614, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=933, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=425, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=21920, PETRI_PLACES=361, PETRI_TRANSITIONS=951} [2024-06-21 18:03:19,488 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 320 predicate places. [2024-06-21 18:03:19,488 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 951 transitions, 21920 flow [2024-06-21 18:03:19,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:19,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:03:19,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:03:19,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 18:03:19,489 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:03:19,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:03:19,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1440121105, now seen corresponding path program 2 times [2024-06-21 18:03:19,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:03:19,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125908587] [2024-06-21 18:03:19,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:03:19,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:03:19,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:03:20,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:03:20,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:03:20,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125908587] [2024-06-21 18:03:20,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125908587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:03:20,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:03:20,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:03:20,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278198461] [2024-06-21 18:03:20,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:03:20,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:03:20,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:03:20,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:03:20,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:03:20,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 18:03:20,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 951 transitions, 21920 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:20,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:03:20,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 18:03:20,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:03:23,985 INFO L124 PetriNetUnfolderBase]: 7976/11921 cut-off events. [2024-06-21 18:03:23,985 INFO L125 PetriNetUnfolderBase]: For 1608396/1608398 co-relation queries the response was YES. [2024-06-21 18:03:24,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132307 conditions, 11921 events. 7976/11921 cut-off events. For 1608396/1608398 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 70800 event pairs, 1414 based on Foata normal form. 7/11927 useless extension candidates. Maximal degree in co-relation 132127. Up to 7271 conditions per place. [2024-06-21 18:03:24,178 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 492 selfloop transitions, 501 changer transitions 0/996 dead transitions. [2024-06-21 18:03:24,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 996 transitions, 24825 flow [2024-06-21 18:03:24,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:03:24,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:03:24,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 18:03:24,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-06-21 18:03:24,179 INFO L175 Difference]: Start difference. First operand has 361 places, 951 transitions, 21920 flow. Second operand 8 states and 148 transitions. [2024-06-21 18:03:24,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 996 transitions, 24825 flow [2024-06-21 18:03:31,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 996 transitions, 24100 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-21 18:03:31,019 INFO L231 Difference]: Finished difference. Result has 365 places, 960 transitions, 22420 flow [2024-06-21 18:03:31,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=21200, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=951, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=492, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=22420, PETRI_PLACES=365, PETRI_TRANSITIONS=960} [2024-06-21 18:03:31,020 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 324 predicate places. [2024-06-21 18:03:31,021 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 960 transitions, 22420 flow [2024-06-21 18:03:31,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:31,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:03:31,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:03:31,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 18:03:31,021 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:03:31,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:03:31,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1440358255, now seen corresponding path program 3 times [2024-06-21 18:03:31,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:03:31,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29808806] [2024-06-21 18:03:31,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:03:31,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:03:31,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:03:31,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:03:31,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:03:31,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29808806] [2024-06-21 18:03:31,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29808806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:03:31,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:03:31,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:03:31,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458881993] [2024-06-21 18:03:31,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:03:31,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:03:31,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:03:31,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:03:31,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:03:31,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 18:03:31,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 960 transitions, 22420 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:31,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:03:31,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 18:03:31,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:03:35,703 INFO L124 PetriNetUnfolderBase]: 7962/11903 cut-off events. [2024-06-21 18:03:35,703 INFO L125 PetriNetUnfolderBase]: For 1617994/1617996 co-relation queries the response was YES. [2024-06-21 18:03:35,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132650 conditions, 11903 events. 7962/11903 cut-off events. For 1617994/1617996 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 70693 event pairs, 1425 based on Foata normal form. 6/11908 useless extension candidates. Maximal degree in co-relation 132469. Up to 7269 conditions per place. [2024-06-21 18:03:35,887 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 510 selfloop transitions, 481 changer transitions 0/994 dead transitions. [2024-06-21 18:03:35,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 994 transitions, 25112 flow [2024-06-21 18:03:35,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:03:35,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:03:35,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 18:03:35,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45625 [2024-06-21 18:03:35,889 INFO L175 Difference]: Start difference. First operand has 365 places, 960 transitions, 22420 flow. Second operand 8 states and 146 transitions. [2024-06-21 18:03:35,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 994 transitions, 25112 flow [2024-06-21 18:03:43,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 994 transitions, 24430 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-21 18:03:43,308 INFO L231 Difference]: Finished difference. Result has 369 places, 960 transitions, 22716 flow [2024-06-21 18:03:43,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=21738, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=960, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=481, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=22716, PETRI_PLACES=369, PETRI_TRANSITIONS=960} [2024-06-21 18:03:43,309 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 328 predicate places. [2024-06-21 18:03:43,309 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 960 transitions, 22716 flow [2024-06-21 18:03:43,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:43,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:03:43,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:03:43,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 18:03:43,310 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:03:43,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:03:43,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1083462041, now seen corresponding path program 1 times [2024-06-21 18:03:43,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:03:43,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375275308] [2024-06-21 18:03:43,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:03:43,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:03:43,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:03:43,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:03:43,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:03:43,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375275308] [2024-06-21 18:03:43,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375275308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:03:43,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:03:43,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:03:43,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151627151] [2024-06-21 18:03:43,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:03:43,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:03:43,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:03:43,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:03:43,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:03:44,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 18:03:44,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 960 transitions, 22716 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:44,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:03:44,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 18:03:44,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:03:48,189 INFO L124 PetriNetUnfolderBase]: 8022/11996 cut-off events. [2024-06-21 18:03:48,190 INFO L125 PetriNetUnfolderBase]: For 1706332/1706342 co-relation queries the response was YES. [2024-06-21 18:03:48,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134289 conditions, 11996 events. 8022/11996 cut-off events. For 1706332/1706342 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 71437 event pairs, 1326 based on Foata normal form. 24/12019 useless extension candidates. Maximal degree in co-relation 134107. Up to 8634 conditions per place. [2024-06-21 18:03:48,387 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 634 selfloop transitions, 375 changer transitions 0/1012 dead transitions. [2024-06-21 18:03:48,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 1012 transitions, 25269 flow [2024-06-21 18:03:48,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:03:48,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:03:48,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 18:03:48,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-21 18:03:48,388 INFO L175 Difference]: Start difference. First operand has 369 places, 960 transitions, 22716 flow. Second operand 9 states and 171 transitions. [2024-06-21 18:03:48,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 1012 transitions, 25269 flow [2024-06-21 18:03:54,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 1012 transitions, 24612 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 18:03:54,805 INFO L231 Difference]: Finished difference. Result has 373 places, 963 transitions, 22897 flow [2024-06-21 18:03:54,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=22059, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=960, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=372, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=22897, PETRI_PLACES=373, PETRI_TRANSITIONS=963} [2024-06-21 18:03:54,805 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 332 predicate places. [2024-06-21 18:03:54,806 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 963 transitions, 22897 flow [2024-06-21 18:03:54,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:54,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:03:54,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:03:54,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 18:03:54,806 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:03:54,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:03:54,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1727657203, now seen corresponding path program 2 times [2024-06-21 18:03:54,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:03:54,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787134159] [2024-06-21 18:03:54,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:03:54,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:03:54,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:03:55,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:03:55,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:03:55,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787134159] [2024-06-21 18:03:55,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787134159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:03:55,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:03:55,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:03:55,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238526549] [2024-06-21 18:03:55,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:03:55,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:03:55,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:03:55,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:03:55,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:03:55,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 18:03:55,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 963 transitions, 22897 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:55,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:03:55,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 18:03:55,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:03:59,714 INFO L124 PetriNetUnfolderBase]: 8082/12088 cut-off events. [2024-06-21 18:03:59,714 INFO L125 PetriNetUnfolderBase]: For 1751048/1751058 co-relation queries the response was YES. [2024-06-21 18:03:59,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135148 conditions, 12088 events. 8082/12088 cut-off events. For 1751048/1751058 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 72185 event pairs, 1456 based on Foata normal form. 24/12111 useless extension candidates. Maximal degree in co-relation 134966. Up to 10053 conditions per place. [2024-06-21 18:03:59,923 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 592 selfloop transitions, 415 changer transitions 0/1010 dead transitions. [2024-06-21 18:03:59,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 1010 transitions, 25239 flow [2024-06-21 18:03:59,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:03:59,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:03:59,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-21 18:03:59,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425 [2024-06-21 18:03:59,940 INFO L175 Difference]: Start difference. First operand has 373 places, 963 transitions, 22897 flow. Second operand 10 states and 177 transitions. [2024-06-21 18:03:59,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 1010 transitions, 25239 flow [2024-06-21 18:04:08,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 1010 transitions, 24593 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 18:04:08,704 INFO L231 Difference]: Finished difference. Result has 377 places, 966 transitions, 23199 flow [2024-06-21 18:04:08,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=22253, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=963, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=412, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=23199, PETRI_PLACES=377, PETRI_TRANSITIONS=966} [2024-06-21 18:04:08,705 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 336 predicate places. [2024-06-21 18:04:08,705 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 966 transitions, 23199 flow [2024-06-21 18:04:08,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:08,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:04:08,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:04:08,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 18:04:08,705 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:04:08,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:04:08,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1727358363, now seen corresponding path program 1 times [2024-06-21 18:04:08,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:04:08,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532385972] [2024-06-21 18:04:08,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:04:08,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:04:08,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:04:09,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:04:09,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:04:09,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532385972] [2024-06-21 18:04:09,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532385972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:04:09,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:04:09,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:04:09,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58327005] [2024-06-21 18:04:09,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:04:09,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:04:09,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:04:09,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:04:09,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:04:09,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 18:04:09,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 966 transitions, 23199 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:09,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:04:09,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 18:04:09,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:04:13,492 INFO L124 PetriNetUnfolderBase]: 8139/12170 cut-off events. [2024-06-21 18:04:13,492 INFO L125 PetriNetUnfolderBase]: For 1724945/1724955 co-relation queries the response was YES. [2024-06-21 18:04:13,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136651 conditions, 12170 events. 8139/12170 cut-off events. For 1724945/1724955 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 72828 event pairs, 1459 based on Foata normal form. 15/12184 useless extension candidates. Maximal degree in co-relation 136468. Up to 9493 conditions per place. [2024-06-21 18:04:13,694 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 588 selfloop transitions, 438 changer transitions 0/1029 dead transitions. [2024-06-21 18:04:13,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 1029 transitions, 26772 flow [2024-06-21 18:04:13,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:04:13,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:04:13,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 18:04:13,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478125 [2024-06-21 18:04:13,696 INFO L175 Difference]: Start difference. First operand has 377 places, 966 transitions, 23199 flow. Second operand 8 states and 153 transitions. [2024-06-21 18:04:13,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 1029 transitions, 26772 flow [2024-06-21 18:04:21,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 1029 transitions, 26002 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-21 18:04:21,661 INFO L231 Difference]: Finished difference. Result has 378 places, 992 transitions, 24193 flow [2024-06-21 18:04:21,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=22440, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=966, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=412, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=24193, PETRI_PLACES=378, PETRI_TRANSITIONS=992} [2024-06-21 18:04:21,661 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 337 predicate places. [2024-06-21 18:04:21,662 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 992 transitions, 24193 flow [2024-06-21 18:04:21,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:21,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:04:21,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:04:21,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 18:04:21,662 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:04:21,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:04:21,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1072964945, now seen corresponding path program 1 times [2024-06-21 18:04:21,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:04:21,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329039288] [2024-06-21 18:04:21,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:04:21,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:04:21,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:04:22,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:04:22,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:04:22,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329039288] [2024-06-21 18:04:22,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329039288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:04:22,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:04:22,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:04:22,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741153841] [2024-06-21 18:04:22,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:04:22,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:04:22,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:04:22,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:04:22,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:04:22,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 18:04:22,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 992 transitions, 24193 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:22,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:04:22,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 18:04:22,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:04:26,459 INFO L124 PetriNetUnfolderBase]: 8147/12174 cut-off events. [2024-06-21 18:04:26,459 INFO L125 PetriNetUnfolderBase]: For 1729325/1729327 co-relation queries the response was YES. [2024-06-21 18:04:26,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137617 conditions, 12174 events. 8147/12174 cut-off events. For 1729325/1729327 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 72724 event pairs, 1583 based on Foata normal form. 4/12177 useless extension candidates. Maximal degree in co-relation 137433. Up to 12052 conditions per place. [2024-06-21 18:04:26,678 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 966 selfloop transitions, 44 changer transitions 0/1013 dead transitions. [2024-06-21 18:04:26,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 1013 transitions, 26331 flow [2024-06-21 18:04:26,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:04:26,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:04:26,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-21 18:04:26,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38125 [2024-06-21 18:04:26,680 INFO L175 Difference]: Start difference. First operand has 378 places, 992 transitions, 24193 flow. Second operand 8 states and 122 transitions. [2024-06-21 18:04:26,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 1013 transitions, 26331 flow [2024-06-21 18:04:35,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 1013 transitions, 25665 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-21 18:04:35,828 INFO L231 Difference]: Finished difference. Result has 382 places, 994 transitions, 23672 flow [2024-06-21 18:04:35,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=23527, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=992, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=948, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=23672, PETRI_PLACES=382, PETRI_TRANSITIONS=994} [2024-06-21 18:04:35,829 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 341 predicate places. [2024-06-21 18:04:35,830 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 994 transitions, 23672 flow [2024-06-21 18:04:35,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:35,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:04:35,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:04:35,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 18:04:35,830 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:04:35,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:04:35,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1440481573, now seen corresponding path program 3 times [2024-06-21 18:04:35,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:04:35,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670194194] [2024-06-21 18:04:35,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:04:35,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:04:35,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:04:36,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:04:36,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:04:36,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670194194] [2024-06-21 18:04:36,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670194194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:04:36,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:04:36,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:04:36,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123697554] [2024-06-21 18:04:36,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:04:36,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:04:36,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:04:36,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:04:36,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:04:36,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 18:04:36,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 994 transitions, 23672 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:36,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:04:36,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 18:04:36,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:04:40,798 INFO L124 PetriNetUnfolderBase]: 8207/12273 cut-off events. [2024-06-21 18:04:40,798 INFO L125 PetriNetUnfolderBase]: For 1786451/1786463 co-relation queries the response was YES. [2024-06-21 18:04:40,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136789 conditions, 12273 events. 8207/12273 cut-off events. For 1786451/1786463 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 73507 event pairs, 1494 based on Foata normal form. 24/12296 useless extension candidates. Maximal degree in co-relation 136604. Up to 11032 conditions per place. [2024-06-21 18:04:41,014 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 789 selfloop transitions, 240 changer transitions 0/1032 dead transitions. [2024-06-21 18:04:41,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 1032 transitions, 26030 flow [2024-06-21 18:04:41,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:04:41,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:04:41,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 18:04:41,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 18:04:41,015 INFO L175 Difference]: Start difference. First operand has 382 places, 994 transitions, 23672 flow. Second operand 9 states and 150 transitions. [2024-06-21 18:04:41,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 1032 transitions, 26030 flow [2024-06-21 18:04:49,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 1032 transitions, 25909 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 18:04:49,878 INFO L231 Difference]: Finished difference. Result has 386 places, 997 transitions, 24134 flow [2024-06-21 18:04:49,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=23551, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=994, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=754, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=24134, PETRI_PLACES=386, PETRI_TRANSITIONS=997} [2024-06-21 18:04:49,879 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 345 predicate places. [2024-06-21 18:04:49,879 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 997 transitions, 24134 flow [2024-06-21 18:04:49,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:49,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:04:49,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:04:49,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 18:04:49,880 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:04:49,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:04:49,881 INFO L85 PathProgramCache]: Analyzing trace with hash 2052999433, now seen corresponding path program 4 times [2024-06-21 18:04:49,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:04:49,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027289946] [2024-06-21 18:04:49,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:04:49,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:04:49,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat