./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe034_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe034_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe034_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe034_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 21:36:10,747 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:36:10,878 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:36:10,885 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:36:10,886 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:36:10,913 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:36:10,916 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:36:10,917 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:36:10,917 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:36:10,921 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:36:10,922 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:36:10,922 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:36:10,923 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:36:10,924 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:36:10,924 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:36:10,925 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:36:10,925 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:36:10,925 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:36:10,925 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:36:10,926 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:36:10,927 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:36:10,927 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:36:10,928 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:36:10,928 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:36:10,928 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:36:10,928 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:36:10,929 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:36:10,929 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:36:10,929 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:36:10,930 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:36:10,931 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:36:10,931 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:36:10,931 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:36:10,931 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:36:10,931 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:36:10,932 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:36:10,932 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:36:10,932 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:36:10,932 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:36:10,932 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:36:10,933 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:36:10,933 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:36:10,933 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:36:10,933 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 21:36:11,193 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:36:11,218 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:36:11,220 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:36:11,221 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:36:11,222 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:36:11,223 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe034_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-27 21:36:12,333 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:36:12,575 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:36:12,576 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe034_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-27 21:36:12,599 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/927cf68de/9edcf96b04ee4978b1f5737a76fead1c/FLAG5b56d29e6 [2024-06-27 21:36:12,611 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/927cf68de/9edcf96b04ee4978b1f5737a76fead1c [2024-06-27 21:36:12,613 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:36:12,614 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:36:12,616 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe034_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-27 21:36:12,806 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:36:12,807 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:36:12,809 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:36:12,809 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:36:12,814 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:36:12,817 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:36:12" (1/2) ... [2024-06-27 21:36:12,818 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@515784e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:36:12, skipping insertion in model container [2024-06-27 21:36:12,819 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:36:12" (1/2) ... [2024-06-27 21:36:12,820 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@18a732bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:36:12, skipping insertion in model container [2024-06-27 21:36:12,821 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:36:12" (2/2) ... [2024-06-27 21:36:12,821 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@515784e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:12, skipping insertion in model container [2024-06-27 21:36:12,821 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:36:12" (2/2) ... [2024-06-27 21:36:12,821 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:36:12,917 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:36:12,919 INFO L97 edCorrectnessWitness]: Location invariant before [L830-L830] (((((((((((((((((! multithreaded || y$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((z == 0 || z == 1) || z == 2)) [2024-06-27 21:36:12,919 INFO L97 edCorrectnessWitness]: Location invariant before [L832-L832] (((((((((((((((((! multithreaded || y$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((z == 0 || z == 1) || z == 2)) [2024-06-27 21:36:12,919 INFO L97 edCorrectnessWitness]: Location invariant before [L833-L833] (((((((((((((((((! multithreaded || y$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((z == 0 || z == 1) || z == 2)) [2024-06-27 21:36:12,919 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:36:12,920 INFO L106 edCorrectnessWitness]: ghost_update [L828-L828] multithreaded = 1; [2024-06-27 21:36:12,966 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:36:13,335 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:36:13,348 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 21:36:13,500 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:36:13,535 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:36:13,535 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:13 WrapperNode [2024-06-27 21:36:13,535 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:36:13,536 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:36:13,536 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:36:13,537 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:36:13,543 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:13" (1/1) ... [2024-06-27 21:36:13,560 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:13" (1/1) ... [2024-06-27 21:36:13,608 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 125 [2024-06-27 21:36:13,608 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:36:13,621 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:36:13,621 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:36:13,621 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:36:13,636 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:13" (1/1) ... [2024-06-27 21:36:13,636 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:13" (1/1) ... [2024-06-27 21:36:13,639 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:13" (1/1) ... [2024-06-27 21:36:13,655 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 21:36:13,655 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:13" (1/1) ... [2024-06-27 21:36:13,655 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:13" (1/1) ... [2024-06-27 21:36:13,663 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:13" (1/1) ... [2024-06-27 21:36:13,665 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:13" (1/1) ... [2024-06-27 21:36:13,667 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:13" (1/1) ... [2024-06-27 21:36:13,669 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:13" (1/1) ... [2024-06-27 21:36:13,672 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:36:13,673 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:36:13,673 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:36:13,673 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:36:13,674 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:13" (1/1) ... [2024-06-27 21:36:13,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:36:13,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:36:13,701 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 21:36:13,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 21:36:13,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 21:36:13,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:36:13,755 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 21:36:13,755 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 21:36:13,755 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 21:36:13,756 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 21:36:13,756 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 21:36:13,756 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 21:36:13,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:36:13,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 21:36:13,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:36:13,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:36:13,759 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 21:36:13,921 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:36:13,923 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:36:14,230 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:36:14,236 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:36:14,430 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:36:14,430 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 21:36:14,431 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:36:14 BoogieIcfgContainer [2024-06-27 21:36:14,431 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:36:14,434 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:36:14,435 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:36:14,438 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:36:14,438 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:36:12" (1/4) ... [2024-06-27 21:36:14,439 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3005ecd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:36:14, skipping insertion in model container [2024-06-27 21:36:14,439 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:36:12" (2/4) ... [2024-06-27 21:36:14,440 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3005ecd9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:36:14, skipping insertion in model container [2024-06-27 21:36:14,440 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:13" (3/4) ... [2024-06-27 21:36:14,440 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3005ecd9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:36:14, skipping insertion in model container [2024-06-27 21:36:14,441 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:36:14" (4/4) ... [2024-06-27 21:36:14,442 INFO L112 eAbstractionObserver]: Analyzing ICFG safe034_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-27 21:36:14,459 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:36:14,460 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 21:36:14,460 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:36:14,537 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 21:36:14,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 21:36:14,617 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-27 21:36:14,617 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:36:14,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 73 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 21:36:14,619 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 21:36:14,623 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-27 21:36:14,638 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:36:14,645 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;@7f53e372, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:36:14,646 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 21:36:14,653 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:36:14,653 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-27 21:36:14,653 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:36:14,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:14,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 21:36:14,655 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:14,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:14,660 INFO L85 PathProgramCache]: Analyzing trace with hash 360629915, now seen corresponding path program 1 times [2024-06-27 21:36:14,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:14,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226143232] [2024-06-27 21:36:14,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:14,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:14,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:15,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:15,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:15,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226143232] [2024-06-27 21:36:15,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226143232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:15,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:15,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:36:15,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500267972] [2024-06-27 21:36:15,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:15,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:36:15,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:15,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:36:15,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:36:15,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-27 21:36:15,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:15,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:15,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-27 21:36:15,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:16,074 INFO L124 PetriNetUnfolderBase]: 869/1381 cut-off events. [2024-06-27 21:36:16,074 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-27 21:36:16,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2759 conditions, 1381 events. 869/1381 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7095 event pairs, 566 based on Foata normal form. 1/1340 useless extension candidates. Maximal degree in co-relation 2747. Up to 1315 conditions per place. [2024-06-27 21:36:16,091 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 30 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-27 21:36:16,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 169 flow [2024-06-27 21:36:16,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:36:16,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:36:16,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-06-27 21:36:16,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6507936507936508 [2024-06-27 21:36:16,105 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 82 transitions. [2024-06-27 21:36:16,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 169 flow [2024-06-27 21:36:16,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 164 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 21:36:16,111 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-27 21:36:16,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-27 21:36:16,117 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-27 21:36:16,117 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-27 21:36:16,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:16,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:16,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:16,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:36:16,118 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:16,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:16,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1326954950, now seen corresponding path program 1 times [2024-06-27 21:36:16,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:16,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450205018] [2024-06-27 21:36:16,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:16,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:16,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:16,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:16,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:16,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450205018] [2024-06-27 21:36:16,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450205018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:16,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:16,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 21:36:16,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209897792] [2024-06-27 21:36:16,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:16,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:36:16,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:16,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:36:16,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:36:16,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-27 21:36:16,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:16,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:16,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-27 21:36:16,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:17,082 INFO L124 PetriNetUnfolderBase]: 863/1368 cut-off events. [2024-06-27 21:36:17,082 INFO L125 PetriNetUnfolderBase]: For 300/300 co-relation queries the response was YES. [2024-06-27 21:36:17,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3143 conditions, 1368 events. 863/1368 cut-off events. For 300/300 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 6887 event pairs, 486 based on Foata normal form. 3/1359 useless extension candidates. Maximal degree in co-relation 3131. Up to 1291 conditions per place. [2024-06-27 21:36:17,092 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 37 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-27 21:36:17,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 236 flow [2024-06-27 21:36:17,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:36:17,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:36:17,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 107 transitions. [2024-06-27 21:36:17,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6369047619047619 [2024-06-27 21:36:17,096 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 107 transitions. [2024-06-27 21:36:17,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 236 flow [2024-06-27 21:36:17,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 232 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:36:17,100 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-27 21:36:17,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-27 21:36:17,101 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-27 21:36:17,101 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-27 21:36:17,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:17,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:17,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:17,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 21:36:17,105 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:17,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:17,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1471908094, now seen corresponding path program 1 times [2024-06-27 21:36:17,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:17,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516007235] [2024-06-27 21:36:17,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:17,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:17,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:17,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:17,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:17,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516007235] [2024-06-27 21:36:17,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516007235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:17,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:17,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:36:17,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835986651] [2024-06-27 21:36:17,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:17,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:36:17,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:17,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:36:17,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:36:17,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:36:17,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:17,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:17,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:36:17,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:18,241 INFO L124 PetriNetUnfolderBase]: 1094/1702 cut-off events. [2024-06-27 21:36:18,241 INFO L125 PetriNetUnfolderBase]: For 973/973 co-relation queries the response was YES. [2024-06-27 21:36:18,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4354 conditions, 1702 events. 1094/1702 cut-off events. For 973/973 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8386 event pairs, 637 based on Foata normal form. 4/1704 useless extension candidates. Maximal degree in co-relation 4339. Up to 1626 conditions per place. [2024-06-27 21:36:18,252 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 39 selfloop transitions, 8 changer transitions 0/54 dead transitions. [2024-06-27 21:36:18,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 54 transitions, 274 flow [2024-06-27 21:36:18,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:36:18,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:36:18,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-06-27 21:36:18,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047619047619047 [2024-06-27 21:36:18,257 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 106 transitions. [2024-06-27 21:36:18,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 54 transitions, 274 flow [2024-06-27 21:36:18,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 54 transitions, 260 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 21:36:18,261 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 166 flow [2024-06-27 21:36:18,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=166, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-27 21:36:18,262 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 6 predicate places. [2024-06-27 21:36:18,262 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 166 flow [2024-06-27 21:36:18,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:18,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:18,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:18,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 21:36:18,263 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:18,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:18,264 INFO L85 PathProgramCache]: Analyzing trace with hash -580904584, now seen corresponding path program 1 times [2024-06-27 21:36:18,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:18,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046918128] [2024-06-27 21:36:18,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:18,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:18,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:19,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:19,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:19,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046918128] [2024-06-27 21:36:19,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046918128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:19,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:19,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:36:19,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000842954] [2024-06-27 21:36:19,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:19,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:36:19,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:19,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:36:19,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:36:19,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-27 21:36:19,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 166 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:19,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:19,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-27 21:36:19,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:19,512 INFO L124 PetriNetUnfolderBase]: 1085/1715 cut-off events. [2024-06-27 21:36:19,512 INFO L125 PetriNetUnfolderBase]: For 1702/1702 co-relation queries the response was YES. [2024-06-27 21:36:19,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4750 conditions, 1715 events. 1085/1715 cut-off events. For 1702/1702 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8562 event pairs, 369 based on Foata normal form. 6/1719 useless extension candidates. Maximal degree in co-relation 4734. Up to 1569 conditions per place. [2024-06-27 21:36:19,525 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 52 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2024-06-27 21:36:19,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 72 transitions, 378 flow [2024-06-27 21:36:19,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:36:19,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:36:19,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-27 21:36:19,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-27 21:36:19,527 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 166 flow. Second operand 6 states and 148 transitions. [2024-06-27 21:36:19,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 72 transitions, 378 flow [2024-06-27 21:36:19,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 72 transitions, 360 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 21:36:19,530 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 207 flow [2024-06-27 21:36:19,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=207, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-27 21:36:19,532 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-27 21:36:19,532 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 207 flow [2024-06-27 21:36:19,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:19,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:19,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:19,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 21:36:19,533 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:19,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:19,533 INFO L85 PathProgramCache]: Analyzing trace with hash 52750403, now seen corresponding path program 1 times [2024-06-27 21:36:19,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:19,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921518735] [2024-06-27 21:36:19,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:19,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:19,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:20,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:20,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:20,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921518735] [2024-06-27 21:36:20,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921518735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:20,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:20,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:36:20,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362000931] [2024-06-27 21:36:20,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:20,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:36:20,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:20,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:36:20,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:36:20,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:36:20,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 207 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:20,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:20,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:36:20,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:20,787 INFO L124 PetriNetUnfolderBase]: 1107/1751 cut-off events. [2024-06-27 21:36:20,787 INFO L125 PetriNetUnfolderBase]: For 2785/2785 co-relation queries the response was YES. [2024-06-27 21:36:20,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5289 conditions, 1751 events. 1107/1751 cut-off events. For 2785/2785 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8805 event pairs, 429 based on Foata normal form. 4/1751 useless extension candidates. Maximal degree in co-relation 5271. Up to 1581 conditions per place. [2024-06-27 21:36:20,799 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 52 selfloop transitions, 16 changer transitions 0/75 dead transitions. [2024-06-27 21:36:20,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 75 transitions, 451 flow [2024-06-27 21:36:20,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:36:20,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:36:20,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-27 21:36:20,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-27 21:36:20,801 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 207 flow. Second operand 6 states and 133 transitions. [2024-06-27 21:36:20,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 75 transitions, 451 flow [2024-06-27 21:36:20,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 75 transitions, 422 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 21:36:20,811 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 260 flow [2024-06-27 21:36:20,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=260, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2024-06-27 21:36:20,813 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-06-27 21:36:20,814 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 260 flow [2024-06-27 21:36:20,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:20,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:20,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:20,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 21:36:20,816 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:20,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:20,816 INFO L85 PathProgramCache]: Analyzing trace with hash -915110589, now seen corresponding path program 2 times [2024-06-27 21:36:20,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:20,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203383712] [2024-06-27 21:36:20,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:20,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:20,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:21,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:21,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:21,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203383712] [2024-06-27 21:36:21,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203383712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:21,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:21,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:36:21,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739620334] [2024-06-27 21:36:21,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:21,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:36:21,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:21,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:36:21,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:36:21,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:36:21,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 260 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:21,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:21,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:36:21,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:22,023 INFO L124 PetriNetUnfolderBase]: 1097/1738 cut-off events. [2024-06-27 21:36:22,023 INFO L125 PetriNetUnfolderBase]: For 3984/3984 co-relation queries the response was YES. [2024-06-27 21:36:22,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5650 conditions, 1738 events. 1097/1738 cut-off events. For 3984/3984 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8673 event pairs, 437 based on Foata normal form. 4/1738 useless extension candidates. Maximal degree in co-relation 5630. Up to 1573 conditions per place. [2024-06-27 21:36:22,037 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 46 selfloop transitions, 16 changer transitions 0/69 dead transitions. [2024-06-27 21:36:22,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 69 transitions, 426 flow [2024-06-27 21:36:22,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:36:22,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:36:22,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-27 21:36:22,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503968253968254 [2024-06-27 21:36:22,039 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 260 flow. Second operand 6 states and 127 transitions. [2024-06-27 21:36:22,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 69 transitions, 426 flow [2024-06-27 21:36:22,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 69 transitions, 396 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 21:36:22,047 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 270 flow [2024-06-27 21:36:22,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=270, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2024-06-27 21:36:22,050 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-27 21:36:22,050 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 270 flow [2024-06-27 21:36:22,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:22,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:22,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:22,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 21:36:22,051 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:22,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:22,052 INFO L85 PathProgramCache]: Analyzing trace with hash 815328861, now seen corresponding path program 1 times [2024-06-27 21:36:22,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:22,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59026635] [2024-06-27 21:36:22,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:22,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:22,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:22,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:22,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:22,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59026635] [2024-06-27 21:36:22,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59026635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:22,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:22,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:36:22,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333865278] [2024-06-27 21:36:22,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:22,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:36:22,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:22,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:36:22,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:36:22,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-27 21:36:22,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 270 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:22,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:22,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-27 21:36:22,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:23,100 INFO L124 PetriNetUnfolderBase]: 1019/1656 cut-off events. [2024-06-27 21:36:23,100 INFO L125 PetriNetUnfolderBase]: For 4335/4335 co-relation queries the response was YES. [2024-06-27 21:36:23,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5467 conditions, 1656 events. 1019/1656 cut-off events. For 4335/4335 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8373 event pairs, 458 based on Foata normal form. 1/1655 useless extension candidates. Maximal degree in co-relation 5445. Up to 1516 conditions per place. [2024-06-27 21:36:23,113 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 44 selfloop transitions, 8 changer transitions 0/63 dead transitions. [2024-06-27 21:36:23,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 63 transitions, 410 flow [2024-06-27 21:36:23,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:36:23,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:36:23,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2024-06-27 21:36:23,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49523809523809526 [2024-06-27 21:36:23,115 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 270 flow. Second operand 5 states and 104 transitions. [2024-06-27 21:36:23,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 63 transitions, 410 flow [2024-06-27 21:36:23,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 63 transitions, 366 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 21:36:23,121 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 270 flow [2024-06-27 21:36:23,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=270, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2024-06-27 21:36:23,123 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 15 predicate places. [2024-06-27 21:36:23,123 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 270 flow [2024-06-27 21:36:23,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:23,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:23,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:23,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 21:36:23,124 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:23,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:23,124 INFO L85 PathProgramCache]: Analyzing trace with hash -137562176, now seen corresponding path program 1 times [2024-06-27 21:36:23,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:23,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673576393] [2024-06-27 21:36:23,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:23,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:23,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:23,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:23,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:23,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673576393] [2024-06-27 21:36:23,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673576393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:23,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:23,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:36:23,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029691759] [2024-06-27 21:36:23,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:23,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:36:23,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:23,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:36:23,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:36:23,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:36:23,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 270 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:23,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:23,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:36:23,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:24,590 INFO L124 PetriNetUnfolderBase]: 1116/1775 cut-off events. [2024-06-27 21:36:24,590 INFO L125 PetriNetUnfolderBase]: For 5648/5648 co-relation queries the response was YES. [2024-06-27 21:36:24,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6149 conditions, 1775 events. 1116/1775 cut-off events. For 5648/5648 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8935 event pairs, 451 based on Foata normal form. 4/1777 useless extension candidates. Maximal degree in co-relation 6127. Up to 1627 conditions per place. [2024-06-27 21:36:24,607 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 63 selfloop transitions, 14 changer transitions 0/84 dead transitions. [2024-06-27 21:36:24,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 84 transitions, 512 flow [2024-06-27 21:36:24,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:36:24,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:36:24,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-27 21:36:24,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5068027210884354 [2024-06-27 21:36:24,609 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 270 flow. Second operand 7 states and 149 transitions. [2024-06-27 21:36:24,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 84 transitions, 512 flow [2024-06-27 21:36:24,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 84 transitions, 490 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 21:36:24,615 INFO L231 Difference]: Finished difference. Result has 62 places, 58 transitions, 312 flow [2024-06-27 21:36:24,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=312, PETRI_PLACES=62, PETRI_TRANSITIONS=58} [2024-06-27 21:36:24,617 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-06-27 21:36:24,617 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 58 transitions, 312 flow [2024-06-27 21:36:24,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:24,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:24,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:24,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 21:36:24,618 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:24,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:24,618 INFO L85 PathProgramCache]: Analyzing trace with hash -137442206, now seen corresponding path program 2 times [2024-06-27 21:36:24,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:24,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299202469] [2024-06-27 21:36:24,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:24,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:24,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:25,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:25,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:25,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299202469] [2024-06-27 21:36:25,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299202469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:25,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:25,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:36:25,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397840085] [2024-06-27 21:36:25,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:25,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:36:25,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:25,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:36:25,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:36:25,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:36:25,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 58 transitions, 312 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:25,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:25,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:36:25,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:26,049 INFO L124 PetriNetUnfolderBase]: 1138/1809 cut-off events. [2024-06-27 21:36:26,049 INFO L125 PetriNetUnfolderBase]: For 7196/7196 co-relation queries the response was YES. [2024-06-27 21:36:26,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6736 conditions, 1809 events. 1138/1809 cut-off events. For 7196/7196 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9177 event pairs, 395 based on Foata normal form. 4/1809 useless extension candidates. Maximal degree in co-relation 6713. Up to 1548 conditions per place. [2024-06-27 21:36:26,070 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 26 changer transitions 0/92 dead transitions. [2024-06-27 21:36:26,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 92 transitions, 636 flow [2024-06-27 21:36:26,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:36:26,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:36:26,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-27 21:36:26,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272108843537415 [2024-06-27 21:36:26,073 INFO L175 Difference]: Start difference. First operand has 62 places, 58 transitions, 312 flow. Second operand 7 states and 155 transitions. [2024-06-27 21:36:26,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 92 transitions, 636 flow [2024-06-27 21:36:26,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 92 transitions, 596 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 21:36:26,080 INFO L231 Difference]: Finished difference. Result has 64 places, 64 transitions, 394 flow [2024-06-27 21:36:26,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=394, PETRI_PLACES=64, PETRI_TRANSITIONS=64} [2024-06-27 21:36:26,082 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-27 21:36:26,082 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 64 transitions, 394 flow [2024-06-27 21:36:26,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:26,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:26,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:26,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 21:36:26,083 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:26,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:26,083 INFO L85 PathProgramCache]: Analyzing trace with hash -981073118, now seen corresponding path program 3 times [2024-06-27 21:36:26,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:26,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672548937] [2024-06-27 21:36:26,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:26,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:26,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:26,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:26,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:26,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672548937] [2024-06-27 21:36:26,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672548937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:26,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:26,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:36:26,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786367123] [2024-06-27 21:36:26,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:26,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:36:26,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:26,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:36:26,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:36:26,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:36:26,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 64 transitions, 394 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:26,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:26,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:36:26,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:27,356 INFO L124 PetriNetUnfolderBase]: 1128/1791 cut-off events. [2024-06-27 21:36:27,357 INFO L125 PetriNetUnfolderBase]: For 9185/9185 co-relation queries the response was YES. [2024-06-27 21:36:27,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7077 conditions, 1791 events. 1128/1791 cut-off events. For 9185/9185 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9073 event pairs, 415 based on Foata normal form. 4/1789 useless extension candidates. Maximal degree in co-relation 7053. Up to 1540 conditions per place. [2024-06-27 21:36:27,374 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 53 selfloop transitions, 26 changer transitions 0/86 dead transitions. [2024-06-27 21:36:27,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 86 transitions, 606 flow [2024-06-27 21:36:27,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:36:27,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:36:27,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-27 21:36:27,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5068027210884354 [2024-06-27 21:36:27,376 INFO L175 Difference]: Start difference. First operand has 64 places, 64 transitions, 394 flow. Second operand 7 states and 149 transitions. [2024-06-27 21:36:27,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 86 transitions, 606 flow [2024-06-27 21:36:27,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 86 transitions, 554 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 21:36:27,388 INFO L231 Difference]: Finished difference. Result has 68 places, 64 transitions, 402 flow [2024-06-27 21:36:27,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=402, PETRI_PLACES=68, PETRI_TRANSITIONS=64} [2024-06-27 21:36:27,389 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 25 predicate places. [2024-06-27 21:36:27,391 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 64 transitions, 402 flow [2024-06-27 21:36:27,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:27,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:27,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:27,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 21:36:27,392 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:27,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:27,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1987077504, now seen corresponding path program 1 times [2024-06-27 21:36:27,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:27,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163233667] [2024-06-27 21:36:27,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:27,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:27,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:28,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:28,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:28,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163233667] [2024-06-27 21:36:28,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163233667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:28,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:28,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:36:28,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527665103] [2024-06-27 21:36:28,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:28,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:36:28,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:28,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:36:28,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:36:28,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:36:28,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 64 transitions, 402 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:28,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:28,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:36:28,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:28,820 INFO L124 PetriNetUnfolderBase]: 1120/1789 cut-off events. [2024-06-27 21:36:28,821 INFO L125 PetriNetUnfolderBase]: For 10424/10424 co-relation queries the response was YES. [2024-06-27 21:36:28,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7200 conditions, 1789 events. 1120/1789 cut-off events. For 10424/10424 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 9005 event pairs, 408 based on Foata normal form. 4/1791 useless extension candidates. Maximal degree in co-relation 7174. Up to 1645 conditions per place. [2024-06-27 21:36:28,830 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 69 selfloop transitions, 13 changer transitions 0/89 dead transitions. [2024-06-27 21:36:28,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 89 transitions, 659 flow [2024-06-27 21:36:28,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:36:28,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:36:28,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-27 21:36:28,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-06-27 21:36:28,832 INFO L175 Difference]: Start difference. First operand has 68 places, 64 transitions, 402 flow. Second operand 7 states and 142 transitions. [2024-06-27 21:36:28,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 89 transitions, 659 flow [2024-06-27 21:36:28,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 89 transitions, 586 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 21:36:28,843 INFO L231 Difference]: Finished difference. Result has 70 places, 69 transitions, 415 flow [2024-06-27 21:36:28,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=415, PETRI_PLACES=70, PETRI_TRANSITIONS=69} [2024-06-27 21:36:28,843 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-27 21:36:28,844 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 69 transitions, 415 flow [2024-06-27 21:36:28,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:28,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:28,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:28,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 21:36:28,845 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:28,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:28,845 INFO L85 PathProgramCache]: Analyzing trace with hash -494607579, now seen corresponding path program 1 times [2024-06-27 21:36:28,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:28,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944709032] [2024-06-27 21:36:28,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:28,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:28,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:29,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:29,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:29,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944709032] [2024-06-27 21:36:29,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944709032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:29,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:29,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:36:29,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912308496] [2024-06-27 21:36:29,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:29,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:36:29,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:29,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:36:29,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:36:29,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-27 21:36:29,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 69 transitions, 415 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:29,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:29,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-27 21:36:29,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:29,896 INFO L124 PetriNetUnfolderBase]: 1027/1665 cut-off events. [2024-06-27 21:36:29,896 INFO L125 PetriNetUnfolderBase]: For 12014/12022 co-relation queries the response was YES. [2024-06-27 21:36:29,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7082 conditions, 1665 events. 1027/1665 cut-off events. For 12014/12022 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8542 event pairs, 411 based on Foata normal form. 7/1654 useless extension candidates. Maximal degree in co-relation 7054. Up to 1493 conditions per place. [2024-06-27 21:36:29,907 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 57 selfloop transitions, 19 changer transitions 0/87 dead transitions. [2024-06-27 21:36:29,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 87 transitions, 667 flow [2024-06-27 21:36:29,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:36:29,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:36:29,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-27 21:36:29,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 21:36:29,909 INFO L175 Difference]: Start difference. First operand has 70 places, 69 transitions, 415 flow. Second operand 6 states and 126 transitions. [2024-06-27 21:36:29,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 87 transitions, 667 flow [2024-06-27 21:36:29,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 87 transitions, 626 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 21:36:29,920 INFO L231 Difference]: Finished difference. Result has 73 places, 77 transitions, 494 flow [2024-06-27 21:36:29,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=494, PETRI_PLACES=73, PETRI_TRANSITIONS=77} [2024-06-27 21:36:29,921 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-27 21:36:29,921 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 77 transitions, 494 flow [2024-06-27 21:36:29,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:29,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:29,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:29,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 21:36:29,922 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:29,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:29,922 INFO L85 PathProgramCache]: Analyzing trace with hash -761051620, now seen corresponding path program 1 times [2024-06-27 21:36:29,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:29,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669763652] [2024-06-27 21:36:29,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:29,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:29,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:30,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:30,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:30,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669763652] [2024-06-27 21:36:30,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669763652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:30,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:30,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:36:30,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689851385] [2024-06-27 21:36:30,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:30,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:36:30,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:30,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:36:30,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:36:30,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-27 21:36:30,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 77 transitions, 494 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:30,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:30,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-27 21:36:30,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:30,927 INFO L124 PetriNetUnfolderBase]: 1056/1725 cut-off events. [2024-06-27 21:36:30,927 INFO L125 PetriNetUnfolderBase]: For 14337/14345 co-relation queries the response was YES. [2024-06-27 21:36:30,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7816 conditions, 1725 events. 1056/1725 cut-off events. For 14337/14345 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8860 event pairs, 410 based on Foata normal form. 6/1716 useless extension candidates. Maximal degree in co-relation 7786. Up to 1547 conditions per place. [2024-06-27 21:36:30,943 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 74 selfloop transitions, 20 changer transitions 0/105 dead transitions. [2024-06-27 21:36:30,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 105 transitions, 808 flow [2024-06-27 21:36:30,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:36:30,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:36:30,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-27 21:36:30,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034013605442177 [2024-06-27 21:36:30,945 INFO L175 Difference]: Start difference. First operand has 73 places, 77 transitions, 494 flow. Second operand 7 states and 148 transitions. [2024-06-27 21:36:30,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 105 transitions, 808 flow [2024-06-27 21:36:30,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 105 transitions, 767 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-27 21:36:30,961 INFO L231 Difference]: Finished difference. Result has 79 places, 87 transitions, 596 flow [2024-06-27 21:36:30,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=596, PETRI_PLACES=79, PETRI_TRANSITIONS=87} [2024-06-27 21:36:30,962 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2024-06-27 21:36:30,962 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 87 transitions, 596 flow [2024-06-27 21:36:30,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:30,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:30,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:30,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 21:36:30,963 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)] === [2024-06-27 21:36:30,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:30,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1418102970, now seen corresponding path program 2 times [2024-06-27 21:36:30,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:30,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869924846] [2024-06-27 21:36:30,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:30,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:30,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:31,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:31,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:31,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869924846] [2024-06-27 21:36:31,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869924846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:31,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:31,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:36:31,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968567444] [2024-06-27 21:36:31,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:31,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:36:31,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:31,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:36:31,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:36:31,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-27 21:36:31,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 87 transitions, 596 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:31,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:31,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-27 21:36:31,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:31,991 INFO L124 PetriNetUnfolderBase]: 1058/1733 cut-off events. [2024-06-27 21:36:31,991 INFO L125 PetriNetUnfolderBase]: For 16096/16128 co-relation queries the response was YES. [2024-06-27 21:36:31,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8065 conditions, 1733 events. 1058/1733 cut-off events. For 16096/16128 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8977 event pairs, 408 based on Foata normal form. 6/1723 useless extension candidates. Maximal degree in co-relation 8032. Up to 1543 conditions per place. [2024-06-27 21:36:32,006 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 72 selfloop transitions, 21 changer transitions 0/104 dead transitions. [2024-06-27 21:36:32,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 104 transitions, 860 flow [2024-06-27 21:36:32,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:36:32,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:36:32,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-27 21:36:32,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503968253968254 [2024-06-27 21:36:32,009 INFO L175 Difference]: Start difference. First operand has 79 places, 87 transitions, 596 flow. Second operand 6 states and 127 transitions. [2024-06-27 21:36:32,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 104 transitions, 860 flow [2024-06-27 21:36:32,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 104 transitions, 826 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 21:36:32,029 INFO L231 Difference]: Finished difference. Result has 82 places, 90 transitions, 658 flow [2024-06-27 21:36:32,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=658, PETRI_PLACES=82, PETRI_TRANSITIONS=90} [2024-06-27 21:36:32,030 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-27 21:36:32,030 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 90 transitions, 658 flow [2024-06-27 21:36:32,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:32,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:32,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:32,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 21:36:32,031 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:32,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:32,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1431435450, now seen corresponding path program 3 times [2024-06-27 21:36:32,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:32,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626336864] [2024-06-27 21:36:32,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:32,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:32,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:32,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:32,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:32,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626336864] [2024-06-27 21:36:32,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626336864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:32,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:32,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:36:32,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092537503] [2024-06-27 21:36:32,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:32,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:36:32,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:32,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:36:32,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:36:32,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-27 21:36:32,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 90 transitions, 658 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:32,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:32,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-27 21:36:32,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:33,043 INFO L124 PetriNetUnfolderBase]: 1050/1709 cut-off events. [2024-06-27 21:36:33,043 INFO L125 PetriNetUnfolderBase]: For 17952/17965 co-relation queries the response was YES. [2024-06-27 21:36:33,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8118 conditions, 1709 events. 1050/1709 cut-off events. For 17952/17965 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8809 event pairs, 413 based on Foata normal form. 6/1692 useless extension candidates. Maximal degree in co-relation 8084. Up to 1508 conditions per place. [2024-06-27 21:36:33,059 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 60 selfloop transitions, 28 changer transitions 0/99 dead transitions. [2024-06-27 21:36:33,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 99 transitions, 860 flow [2024-06-27 21:36:33,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:36:33,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:36:33,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-06-27 21:36:33,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49603174603174605 [2024-06-27 21:36:33,061 INFO L175 Difference]: Start difference. First operand has 82 places, 90 transitions, 658 flow. Second operand 6 states and 125 transitions. [2024-06-27 21:36:33,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 99 transitions, 860 flow [2024-06-27 21:36:33,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 99 transitions, 796 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 21:36:33,083 INFO L231 Difference]: Finished difference. Result has 84 places, 90 transitions, 658 flow [2024-06-27 21:36:33,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=594, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=658, PETRI_PLACES=84, PETRI_TRANSITIONS=90} [2024-06-27 21:36:33,084 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 41 predicate places. [2024-06-27 21:36:33,084 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 90 transitions, 658 flow [2024-06-27 21:36:33,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:33,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:33,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:33,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 21:36:33,085 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:33,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:33,085 INFO L85 PathProgramCache]: Analyzing trace with hash -678050020, now seen corresponding path program 1 times [2024-06-27 21:36:33,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:33,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616204583] [2024-06-27 21:36:33,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:33,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:33,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:33,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:33,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:33,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616204583] [2024-06-27 21:36:33,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616204583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:33,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:33,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:36:33,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270735250] [2024-06-27 21:36:33,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:33,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:36:33,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:33,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:36:33,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:36:33,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:36:33,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 90 transitions, 658 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:33,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:33,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:36:33,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:34,129 INFO L124 PetriNetUnfolderBase]: 1169/1877 cut-off events. [2024-06-27 21:36:34,130 INFO L125 PetriNetUnfolderBase]: For 17581/17583 co-relation queries the response was YES. [2024-06-27 21:36:34,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8688 conditions, 1877 events. 1169/1877 cut-off events. For 17581/17583 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 9550 event pairs, 425 based on Foata normal form. 2/1877 useless extension candidates. Maximal degree in co-relation 8653. Up to 1738 conditions per place. [2024-06-27 21:36:34,142 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 88 selfloop transitions, 11 changer transitions 0/106 dead transitions. [2024-06-27 21:36:34,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 106 transitions, 924 flow [2024-06-27 21:36:34,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:36:34,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:36:34,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-27 21:36:34,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 21:36:34,144 INFO L175 Difference]: Start difference. First operand has 84 places, 90 transitions, 658 flow. Second operand 6 states and 120 transitions. [2024-06-27 21:36:34,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 106 transitions, 924 flow [2024-06-27 21:36:34,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 106 transitions, 846 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 21:36:34,169 INFO L231 Difference]: Finished difference. Result has 85 places, 93 transitions, 642 flow [2024-06-27 21:36:34,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=642, PETRI_PLACES=85, PETRI_TRANSITIONS=93} [2024-06-27 21:36:34,170 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 42 predicate places. [2024-06-27 21:36:34,170 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 93 transitions, 642 flow [2024-06-27 21:36:34,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:34,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:34,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:34,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 21:36:34,171 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:34,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:34,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1847026844, now seen corresponding path program 2 times [2024-06-27 21:36:34,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:34,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011973886] [2024-06-27 21:36:34,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:34,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:34,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:34,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:34,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:34,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011973886] [2024-06-27 21:36:34,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011973886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:34,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:34,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:36:34,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812885500] [2024-06-27 21:36:34,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:34,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:36:34,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:34,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:36:34,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:36:34,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:36:34,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 93 transitions, 642 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:34,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:34,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:36:34,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:35,186 INFO L124 PetriNetUnfolderBase]: 1171/1879 cut-off events. [2024-06-27 21:36:35,186 INFO L125 PetriNetUnfolderBase]: For 19796/19798 co-relation queries the response was YES. [2024-06-27 21:36:35,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8962 conditions, 1879 events. 1171/1879 cut-off events. For 19796/19798 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 9613 event pairs, 429 based on Foata normal form. 2/1878 useless extension candidates. Maximal degree in co-relation 8926. Up to 1732 conditions per place. [2024-06-27 21:36:35,202 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 84 selfloop transitions, 16 changer transitions 0/107 dead transitions. [2024-06-27 21:36:35,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 107 transitions, 910 flow [2024-06-27 21:36:35,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:36:35,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:36:35,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-27 21:36:35,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 21:36:35,204 INFO L175 Difference]: Start difference. First operand has 85 places, 93 transitions, 642 flow. Second operand 6 states and 120 transitions. [2024-06-27 21:36:35,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 107 transitions, 910 flow [2024-06-27 21:36:35,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 107 transitions, 870 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 21:36:35,232 INFO L231 Difference]: Finished difference. Result has 87 places, 96 transitions, 680 flow [2024-06-27 21:36:35,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=680, PETRI_PLACES=87, PETRI_TRANSITIONS=96} [2024-06-27 21:36:35,232 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-27 21:36:35,233 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 96 transitions, 680 flow [2024-06-27 21:36:35,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:35,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:35,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:35,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 21:36:35,233 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:35,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:35,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1431451322, now seen corresponding path program 1 times [2024-06-27 21:36:35,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:35,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530328563] [2024-06-27 21:36:35,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:35,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:35,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:36,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:36,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:36,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530328563] [2024-06-27 21:36:36,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530328563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:36,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:36,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:36:36,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654316192] [2024-06-27 21:36:36,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:36,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:36:36,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:36,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:36:36,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:36:36,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-27 21:36:36,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 96 transitions, 680 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:36,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:36,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-27 21:36:36,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:36,651 INFO L124 PetriNetUnfolderBase]: 1057/1733 cut-off events. [2024-06-27 21:36:36,651 INFO L125 PetriNetUnfolderBase]: For 21405/21422 co-relation queries the response was YES. [2024-06-27 21:36:36,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8771 conditions, 1733 events. 1057/1733 cut-off events. For 21405/21422 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 9009 event pairs, 409 based on Foata normal form. 7/1716 useless extension candidates. Maximal degree in co-relation 8734. Up to 1516 conditions per place. [2024-06-27 21:36:36,664 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 65 selfloop transitions, 34 changer transitions 0/110 dead transitions. [2024-06-27 21:36:36,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 110 transitions, 946 flow [2024-06-27 21:36:36,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:36:36,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:36:36,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-27 21:36:36,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48639455782312924 [2024-06-27 21:36:36,666 INFO L175 Difference]: Start difference. First operand has 87 places, 96 transitions, 680 flow. Second operand 7 states and 143 transitions. [2024-06-27 21:36:36,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 110 transitions, 946 flow [2024-06-27 21:36:36,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 110 transitions, 890 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 21:36:36,694 INFO L231 Difference]: Finished difference. Result has 90 places, 100 transitions, 747 flow [2024-06-27 21:36:36,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=747, PETRI_PLACES=90, PETRI_TRANSITIONS=100} [2024-06-27 21:36:36,695 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2024-06-27 21:36:36,695 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 100 transitions, 747 flow [2024-06-27 21:36:36,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:36,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:36,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:36,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 21:36:36,696 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:36,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:36,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1239944095, now seen corresponding path program 1 times [2024-06-27 21:36:36,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:36,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125683961] [2024-06-27 21:36:36,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:36,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:36,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:37,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:37,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:37,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125683961] [2024-06-27 21:36:37,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125683961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:37,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:37,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:36:37,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377043816] [2024-06-27 21:36:37,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:37,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:36:37,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:37,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:36:37,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:36:37,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:36:37,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 100 transitions, 747 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:37,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:37,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:36:37,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:38,186 INFO L124 PetriNetUnfolderBase]: 1347/2185 cut-off events. [2024-06-27 21:36:38,187 INFO L125 PetriNetUnfolderBase]: For 28634/28634 co-relation queries the response was YES. [2024-06-27 21:36:38,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11276 conditions, 2185 events. 1347/2185 cut-off events. For 28634/28634 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 11587 event pairs, 346 based on Foata normal form. 16/2199 useless extension candidates. Maximal degree in co-relation 11238. Up to 1682 conditions per place. [2024-06-27 21:36:38,199 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 117 selfloop transitions, 23 changer transitions 0/147 dead transitions. [2024-06-27 21:36:38,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 147 transitions, 1285 flow [2024-06-27 21:36:38,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:36:38,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:36:38,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-27 21:36:38,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2024-06-27 21:36:38,201 INFO L175 Difference]: Start difference. First operand has 90 places, 100 transitions, 747 flow. Second operand 9 states and 195 transitions. [2024-06-27 21:36:38,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 147 transitions, 1285 flow [2024-06-27 21:36:38,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 147 transitions, 1190 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 21:36:38,234 INFO L231 Difference]: Finished difference. Result has 94 places, 102 transitions, 742 flow [2024-06-27 21:36:38,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=652, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=742, PETRI_PLACES=94, PETRI_TRANSITIONS=102} [2024-06-27 21:36:38,235 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-27 21:36:38,235 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 102 transitions, 742 flow [2024-06-27 21:36:38,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:38,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:38,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:38,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 21:36:38,236 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:38,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:38,236 INFO L85 PathProgramCache]: Analyzing trace with hash 946784799, now seen corresponding path program 2 times [2024-06-27 21:36:38,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:38,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744326131] [2024-06-27 21:36:38,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:38,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:38,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:39,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:39,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:39,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744326131] [2024-06-27 21:36:39,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744326131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:39,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:39,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:36:39,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789071452] [2024-06-27 21:36:39,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:39,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:36:39,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:39,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:36:39,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:36:39,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:36:39,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 102 transitions, 742 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:39,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:39,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:36:39,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:39,738 INFO L124 PetriNetUnfolderBase]: 1311/2125 cut-off events. [2024-06-27 21:36:39,738 INFO L125 PetriNetUnfolderBase]: For 29500/29500 co-relation queries the response was YES. [2024-06-27 21:36:39,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10925 conditions, 2125 events. 1311/2125 cut-off events. For 29500/29500 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11212 event pairs, 435 based on Foata normal form. 20/2143 useless extension candidates. Maximal degree in co-relation 10886. Up to 1800 conditions per place. [2024-06-27 21:36:39,750 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 110 selfloop transitions, 20 changer transitions 0/137 dead transitions. [2024-06-27 21:36:39,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 137 transitions, 1132 flow [2024-06-27 21:36:39,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:36:39,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:36:39,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-27 21:36:39,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5089285714285714 [2024-06-27 21:36:39,752 INFO L175 Difference]: Start difference. First operand has 94 places, 102 transitions, 742 flow. Second operand 8 states and 171 transitions. [2024-06-27 21:36:39,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 137 transitions, 1132 flow [2024-06-27 21:36:39,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 137 transitions, 1096 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 21:36:39,780 INFO L231 Difference]: Finished difference. Result has 97 places, 102 transitions, 753 flow [2024-06-27 21:36:39,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=706, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=753, PETRI_PLACES=97, PETRI_TRANSITIONS=102} [2024-06-27 21:36:39,780 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-27 21:36:39,781 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 102 transitions, 753 flow [2024-06-27 21:36:39,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:39,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:39,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:39,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 21:36:39,782 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:39,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:39,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1663148031, now seen corresponding path program 3 times [2024-06-27 21:36:39,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:39,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691224382] [2024-06-27 21:36:39,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:39,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:39,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:40,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:40,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:40,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691224382] [2024-06-27 21:36:40,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691224382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:40,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:40,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:36:40,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034598962] [2024-06-27 21:36:40,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:40,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:36:40,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:40,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:36:40,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:36:40,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:36:40,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 102 transitions, 753 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:40,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:40,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:36:40,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:41,239 INFO L124 PetriNetUnfolderBase]: 1386/2248 cut-off events. [2024-06-27 21:36:41,239 INFO L125 PetriNetUnfolderBase]: For 33143/33145 co-relation queries the response was YES. [2024-06-27 21:36:41,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11640 conditions, 2248 events. 1386/2248 cut-off events. For 33143/33145 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 12057 event pairs, 421 based on Foata normal form. 20/2264 useless extension candidates. Maximal degree in co-relation 11599. Up to 1815 conditions per place. [2024-06-27 21:36:41,253 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 95 selfloop transitions, 34 changer transitions 0/136 dead transitions. [2024-06-27 21:36:41,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 136 transitions, 1153 flow [2024-06-27 21:36:41,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:36:41,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:36:41,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-27 21:36:41,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-27 21:36:41,255 INFO L175 Difference]: Start difference. First operand has 97 places, 102 transitions, 753 flow. Second operand 8 states and 175 transitions. [2024-06-27 21:36:41,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 136 transitions, 1153 flow [2024-06-27 21:36:41,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 136 transitions, 1107 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 21:36:41,291 INFO L231 Difference]: Finished difference. Result has 98 places, 103 transitions, 804 flow [2024-06-27 21:36:41,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=707, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=804, PETRI_PLACES=98, PETRI_TRANSITIONS=103} [2024-06-27 21:36:41,292 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-27 21:36:41,292 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 103 transitions, 804 flow [2024-06-27 21:36:41,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:41,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:41,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:41,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 21:36:41,293 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:41,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:41,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1234395231, now seen corresponding path program 1 times [2024-06-27 21:36:41,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:41,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331098448] [2024-06-27 21:36:41,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:41,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:41,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:42,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:42,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:42,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331098448] [2024-06-27 21:36:42,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331098448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:42,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:42,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:36:42,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666953126] [2024-06-27 21:36:42,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:42,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:36:42,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:42,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:36:42,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:36:42,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:36:42,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 103 transitions, 804 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:42,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:42,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:36:42,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:42,885 INFO L124 PetriNetUnfolderBase]: 1403/2284 cut-off events. [2024-06-27 21:36:42,885 INFO L125 PetriNetUnfolderBase]: For 34672/34672 co-relation queries the response was YES. [2024-06-27 21:36:42,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11989 conditions, 2284 events. 1403/2284 cut-off events. For 34672/34672 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12329 event pairs, 423 based on Foata normal form. 4/2284 useless extension candidates. Maximal degree in co-relation 11947. Up to 2039 conditions per place. [2024-06-27 21:36:42,900 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 105 selfloop transitions, 25 changer transitions 0/137 dead transitions. [2024-06-27 21:36:42,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 137 transitions, 1203 flow [2024-06-27 21:36:42,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:36:42,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:36:42,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-27 21:36:42,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 21:36:42,905 INFO L175 Difference]: Start difference. First operand has 98 places, 103 transitions, 804 flow. Second operand 8 states and 168 transitions. [2024-06-27 21:36:42,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 137 transitions, 1203 flow [2024-06-27 21:36:42,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 137 transitions, 1126 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 21:36:42,935 INFO L231 Difference]: Finished difference. Result has 101 places, 108 transitions, 842 flow [2024-06-27 21:36:42,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=731, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=842, PETRI_PLACES=101, PETRI_TRANSITIONS=108} [2024-06-27 21:36:42,935 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-27 21:36:42,936 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 108 transitions, 842 flow [2024-06-27 21:36:42,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:42,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:42,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:42,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 21:36:42,936 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:42,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:42,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1209498881, now seen corresponding path program 4 times [2024-06-27 21:36:42,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:42,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794016797] [2024-06-27 21:36:42,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:42,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:42,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:43,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:43,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:43,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794016797] [2024-06-27 21:36:43,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794016797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:43,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:43,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:36:43,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437651030] [2024-06-27 21:36:43,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:43,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:36:43,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:43,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:36:43,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:36:43,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:36:43,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 108 transitions, 842 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:43,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:43,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:36:43,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:44,381 INFO L124 PetriNetUnfolderBase]: 1428/2322 cut-off events. [2024-06-27 21:36:44,381 INFO L125 PetriNetUnfolderBase]: For 38794/38794 co-relation queries the response was YES. [2024-06-27 21:36:44,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12371 conditions, 2322 events. 1428/2322 cut-off events. For 38794/38794 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12519 event pairs, 409 based on Foata normal form. 20/2332 useless extension candidates. Maximal degree in co-relation 12327. Up to 1889 conditions per place. [2024-06-27 21:36:44,394 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 98 selfloop transitions, 35 changer transitions 0/140 dead transitions. [2024-06-27 21:36:44,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 140 transitions, 1256 flow [2024-06-27 21:36:44,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:36:44,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:36:44,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-27 21:36:44,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5089285714285714 [2024-06-27 21:36:44,396 INFO L175 Difference]: Start difference. First operand has 101 places, 108 transitions, 842 flow. Second operand 8 states and 171 transitions. [2024-06-27 21:36:44,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 140 transitions, 1256 flow [2024-06-27 21:36:44,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 140 transitions, 1187 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 21:36:44,418 INFO L231 Difference]: Finished difference. Result has 104 places, 109 transitions, 876 flow [2024-06-27 21:36:44,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=773, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=876, PETRI_PLACES=104, PETRI_TRANSITIONS=109} [2024-06-27 21:36:44,419 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-27 21:36:44,419 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 109 transitions, 876 flow [2024-06-27 21:36:44,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:44,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:44,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:44,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 21:36:44,419 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:44,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:44,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1336076193, now seen corresponding path program 2 times [2024-06-27 21:36:44,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:44,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313649864] [2024-06-27 21:36:44,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:44,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:44,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:45,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:45,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:45,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313649864] [2024-06-27 21:36:45,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313649864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:45,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:45,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:36:45,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381004068] [2024-06-27 21:36:45,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:45,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:36:45,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:45,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:36:45,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:36:45,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:36:45,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 109 transitions, 876 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:45,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:45,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:36:45,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:45,969 INFO L124 PetriNetUnfolderBase]: 1456/2387 cut-off events. [2024-06-27 21:36:45,969 INFO L125 PetriNetUnfolderBase]: For 40081/40081 co-relation queries the response was YES. [2024-06-27 21:36:45,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12796 conditions, 2387 events. 1456/2387 cut-off events. For 40081/40081 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 13000 event pairs, 433 based on Foata normal form. 4/2385 useless extension candidates. Maximal degree in co-relation 12751. Up to 2125 conditions per place. [2024-06-27 21:36:45,982 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 106 selfloop transitions, 28 changer transitions 0/141 dead transitions. [2024-06-27 21:36:45,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 141 transitions, 1289 flow [2024-06-27 21:36:45,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:36:45,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:36:45,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-27 21:36:45,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49107142857142855 [2024-06-27 21:36:45,983 INFO L175 Difference]: Start difference. First operand has 104 places, 109 transitions, 876 flow. Second operand 8 states and 165 transitions. [2024-06-27 21:36:45,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 141 transitions, 1289 flow [2024-06-27 21:36:46,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 141 transitions, 1204 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 21:36:46,013 INFO L231 Difference]: Finished difference. Result has 107 places, 115 transitions, 929 flow [2024-06-27 21:36:46,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=797, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=929, PETRI_PLACES=107, PETRI_TRANSITIONS=115} [2024-06-27 21:36:46,013 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 64 predicate places. [2024-06-27 21:36:46,013 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 115 transitions, 929 flow [2024-06-27 21:36:46,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:46,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:46,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:46,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 21:36:46,014 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:46,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:46,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1136168645, now seen corresponding path program 3 times [2024-06-27 21:36:46,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:46,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188858723] [2024-06-27 21:36:46,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:46,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:46,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:46,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:46,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:46,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188858723] [2024-06-27 21:36:46,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188858723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:46,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:46,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:36:46,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41471044] [2024-06-27 21:36:46,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:46,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:36:46,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:46,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:36:46,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:36:47,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:36:47,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 115 transitions, 929 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:47,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:47,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:36:47,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:47,555 INFO L124 PetriNetUnfolderBase]: 1473/2424 cut-off events. [2024-06-27 21:36:47,555 INFO L125 PetriNetUnfolderBase]: For 42972/42972 co-relation queries the response was YES. [2024-06-27 21:36:47,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13204 conditions, 2424 events. 1473/2424 cut-off events. For 42972/42972 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 13311 event pairs, 438 based on Foata normal form. 4/2422 useless extension candidates. Maximal degree in co-relation 13157. Up to 2152 conditions per place. [2024-06-27 21:36:47,570 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 107 selfloop transitions, 31 changer transitions 0/145 dead transitions. [2024-06-27 21:36:47,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 145 transitions, 1342 flow [2024-06-27 21:36:47,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:36:47,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:36:47,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-27 21:36:47,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-27 21:36:47,571 INFO L175 Difference]: Start difference. First operand has 107 places, 115 transitions, 929 flow. Second operand 8 states and 164 transitions. [2024-06-27 21:36:47,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 145 transitions, 1342 flow [2024-06-27 21:36:47,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 145 transitions, 1255 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 21:36:47,607 INFO L231 Difference]: Finished difference. Result has 110 places, 119 transitions, 970 flow [2024-06-27 21:36:47,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=846, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=970, PETRI_PLACES=110, PETRI_TRANSITIONS=119} [2024-06-27 21:36:47,608 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-27 21:36:47,608 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 119 transitions, 970 flow [2024-06-27 21:36:47,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:47,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:47,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:47,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 21:36:47,608 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:47,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:47,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1127546279, now seen corresponding path program 4 times [2024-06-27 21:36:47,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:47,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649629222] [2024-06-27 21:36:47,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:47,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:47,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:48,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:48,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:48,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649629222] [2024-06-27 21:36:48,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649629222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:48,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:48,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:36:48,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65260445] [2024-06-27 21:36:48,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:48,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:36:48,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:48,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:36:48,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:36:48,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:36:48,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 119 transitions, 970 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:48,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:48,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:36:48,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:49,152 INFO L124 PetriNetUnfolderBase]: 1465/2412 cut-off events. [2024-06-27 21:36:49,152 INFO L125 PetriNetUnfolderBase]: For 45376/45376 co-relation queries the response was YES. [2024-06-27 21:36:49,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13258 conditions, 2412 events. 1465/2412 cut-off events. For 45376/45376 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 13252 event pairs, 380 based on Foata normal form. 4/2410 useless extension candidates. Maximal degree in co-relation 13210. Up to 2063 conditions per place. [2024-06-27 21:36:49,169 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 103 selfloop transitions, 38 changer transitions 0/148 dead transitions. [2024-06-27 21:36:49,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 148 transitions, 1376 flow [2024-06-27 21:36:49,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:36:49,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:36:49,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-27 21:36:49,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49107142857142855 [2024-06-27 21:36:49,170 INFO L175 Difference]: Start difference. First operand has 110 places, 119 transitions, 970 flow. Second operand 8 states and 165 transitions. [2024-06-27 21:36:49,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 148 transitions, 1376 flow [2024-06-27 21:36:49,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 148 transitions, 1300 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 21:36:49,222 INFO L231 Difference]: Finished difference. Result has 114 places, 121 transitions, 1021 flow [2024-06-27 21:36:49,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=894, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1021, PETRI_PLACES=114, PETRI_TRANSITIONS=121} [2024-06-27 21:36:49,222 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 71 predicate places. [2024-06-27 21:36:49,222 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 121 transitions, 1021 flow [2024-06-27 21:36:49,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:49,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:49,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:49,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 21:36:49,223 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:49,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:49,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1218389320, now seen corresponding path program 1 times [2024-06-27 21:36:49,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:49,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967299917] [2024-06-27 21:36:49,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:49,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:49,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:49,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:49,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:49,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967299917] [2024-06-27 21:36:49,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967299917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:49,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:49,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:36:49,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779931739] [2024-06-27 21:36:49,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:49,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:36:49,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:49,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:36:49,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:36:50,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:36:50,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 121 transitions, 1021 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:50,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:50,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:36:50,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:50,398 INFO L124 PetriNetUnfolderBase]: 1521/2502 cut-off events. [2024-06-27 21:36:50,398 INFO L125 PetriNetUnfolderBase]: For 50591/50591 co-relation queries the response was YES. [2024-06-27 21:36:50,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14024 conditions, 2502 events. 1521/2502 cut-off events. For 50591/50591 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 13795 event pairs, 437 based on Foata normal form. 4/2500 useless extension candidates. Maximal degree in co-relation 13975. Up to 2221 conditions per place. [2024-06-27 21:36:50,416 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 113 selfloop transitions, 27 changer transitions 0/147 dead transitions. [2024-06-27 21:36:50,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 147 transitions, 1505 flow [2024-06-27 21:36:50,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:36:50,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:36:50,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-27 21:36:50,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48639455782312924 [2024-06-27 21:36:50,421 INFO L175 Difference]: Start difference. First operand has 114 places, 121 transitions, 1021 flow. Second operand 7 states and 143 transitions. [2024-06-27 21:36:50,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 147 transitions, 1505 flow [2024-06-27 21:36:50,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 147 transitions, 1396 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 21:36:50,479 INFO L231 Difference]: Finished difference. Result has 116 places, 129 transitions, 1082 flow [2024-06-27 21:36:50,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=912, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1082, PETRI_PLACES=116, PETRI_TRANSITIONS=129} [2024-06-27 21:36:50,480 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-27 21:36:50,480 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 129 transitions, 1082 flow [2024-06-27 21:36:50,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:50,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:50,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:50,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 21:36:50,480 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:50,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:50,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1423525732, now seen corresponding path program 2 times [2024-06-27 21:36:50,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:50,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950023570] [2024-06-27 21:36:50,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:50,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:50,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:51,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:51,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:51,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950023570] [2024-06-27 21:36:51,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950023570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:51,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:51,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:36:51,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617028360] [2024-06-27 21:36:51,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:51,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:36:51,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:51,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:36:51,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:36:51,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:36:51,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 129 transitions, 1082 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:51,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:51,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:36:51,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:51,603 INFO L124 PetriNetUnfolderBase]: 1581/2588 cut-off events. [2024-06-27 21:36:51,603 INFO L125 PetriNetUnfolderBase]: For 58556/58556 co-relation queries the response was YES. [2024-06-27 21:36:51,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15110 conditions, 2588 events. 1581/2588 cut-off events. For 58556/58556 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 14456 event pairs, 451 based on Foata normal form. 4/2584 useless extension candidates. Maximal degree in co-relation 15059. Up to 2201 conditions per place. [2024-06-27 21:36:51,622 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 114 selfloop transitions, 46 changer transitions 0/167 dead transitions. [2024-06-27 21:36:51,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 167 transitions, 1797 flow [2024-06-27 21:36:51,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:36:51,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:36:51,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-27 21:36:51,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4931972789115646 [2024-06-27 21:36:51,624 INFO L175 Difference]: Start difference. First operand has 116 places, 129 transitions, 1082 flow. Second operand 7 states and 145 transitions. [2024-06-27 21:36:51,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 167 transitions, 1797 flow [2024-06-27 21:36:51,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 167 transitions, 1726 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-27 21:36:51,682 INFO L231 Difference]: Finished difference. Result has 122 places, 147 transitions, 1381 flow [2024-06-27 21:36:51,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1011, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1381, PETRI_PLACES=122, PETRI_TRANSITIONS=147} [2024-06-27 21:36:51,682 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 79 predicate places. [2024-06-27 21:36:51,682 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 147 transitions, 1381 flow [2024-06-27 21:36:51,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:51,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:51,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:51,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 21:36:51,683 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:51,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:51,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1423258822, now seen corresponding path program 3 times [2024-06-27 21:36:51,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:51,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823097458] [2024-06-27 21:36:51,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:51,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:51,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:52,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:52,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:52,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823097458] [2024-06-27 21:36:52,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823097458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:52,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:52,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:36:52,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139039035] [2024-06-27 21:36:52,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:52,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:36:52,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:52,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:36:52,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:36:52,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:36:52,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 147 transitions, 1381 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:52,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:52,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:36:52,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:52,799 INFO L124 PetriNetUnfolderBase]: 1573/2578 cut-off events. [2024-06-27 21:36:52,799 INFO L125 PetriNetUnfolderBase]: For 62378/62378 co-relation queries the response was YES. [2024-06-27 21:36:52,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15700 conditions, 2578 events. 1573/2578 cut-off events. For 62378/62378 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 14385 event pairs, 458 based on Foata normal form. 4/2574 useless extension candidates. Maximal degree in co-relation 15645. Up to 2198 conditions per place. [2024-06-27 21:36:52,818 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 119 selfloop transitions, 43 changer transitions 0/169 dead transitions. [2024-06-27 21:36:52,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 169 transitions, 1935 flow [2024-06-27 21:36:52,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:36:52,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:36:52,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-27 21:36:52,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4931972789115646 [2024-06-27 21:36:52,819 INFO L175 Difference]: Start difference. First operand has 122 places, 147 transitions, 1381 flow. Second operand 7 states and 145 transitions. [2024-06-27 21:36:52,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 169 transitions, 1935 flow [2024-06-27 21:36:52,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 169 transitions, 1810 flow, removed 55 selfloop flow, removed 2 redundant places. [2024-06-27 21:36:52,894 INFO L231 Difference]: Finished difference. Result has 128 places, 152 transitions, 1434 flow [2024-06-27 21:36:52,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1268, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1434, PETRI_PLACES=128, PETRI_TRANSITIONS=152} [2024-06-27 21:36:52,895 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 85 predicate places. [2024-06-27 21:36:52,895 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 152 transitions, 1434 flow [2024-06-27 21:36:52,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:52,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:52,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:52,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 21:36:52,896 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:52,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:52,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1425319590, now seen corresponding path program 1 times [2024-06-27 21:36:52,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:52,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896602178] [2024-06-27 21:36:52,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:52,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:52,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:53,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:53,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:53,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896602178] [2024-06-27 21:36:53,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896602178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:53,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:53,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:36:53,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773720300] [2024-06-27 21:36:53,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:53,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:36:53,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:53,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:36:53,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:36:53,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-27 21:36:53,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 152 transitions, 1434 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:53,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:53,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-27 21:36:53,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:54,248 INFO L124 PetriNetUnfolderBase]: 1506/2510 cut-off events. [2024-06-27 21:36:54,248 INFO L125 PetriNetUnfolderBase]: For 67574/67597 co-relation queries the response was YES. [2024-06-27 21:36:54,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15127 conditions, 2510 events. 1506/2510 cut-off events. For 67574/67597 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 14318 event pairs, 453 based on Foata normal form. 12/2494 useless extension candidates. Maximal degree in co-relation 15069. Up to 2094 conditions per place. [2024-06-27 21:36:54,267 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 99 selfloop transitions, 45 changer transitions 0/169 dead transitions. [2024-06-27 21:36:54,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 169 transitions, 1808 flow [2024-06-27 21:36:54,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:36:54,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:36:54,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-27 21:36:54,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-06-27 21:36:54,268 INFO L175 Difference]: Start difference. First operand has 128 places, 152 transitions, 1434 flow. Second operand 8 states and 163 transitions. [2024-06-27 21:36:54,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 169 transitions, 1808 flow [2024-06-27 21:36:54,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 169 transitions, 1731 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 21:36:54,326 INFO L231 Difference]: Finished difference. Result has 132 places, 154 transitions, 1493 flow [2024-06-27 21:36:54,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1357, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1493, PETRI_PLACES=132, PETRI_TRANSITIONS=154} [2024-06-27 21:36:54,327 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-27 21:36:54,327 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 154 transitions, 1493 flow [2024-06-27 21:36:54,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:54,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:54,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:54,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 21:36:54,327 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:54,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:54,327 INFO L85 PathProgramCache]: Analyzing trace with hash -2021382663, now seen corresponding path program 1 times [2024-06-27 21:36:54,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:54,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176262564] [2024-06-27 21:36:54,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:54,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:54,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:54,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:54,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:54,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176262564] [2024-06-27 21:36:54,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176262564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:54,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:54,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:36:54,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366551774] [2024-06-27 21:36:54,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:54,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:36:54,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:54,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:36:54,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:36:54,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:36:54,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 154 transitions, 1493 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:54,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:54,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:36:54,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:55,436 INFO L124 PetriNetUnfolderBase]: 1614/2648 cut-off events. [2024-06-27 21:36:55,436 INFO L125 PetriNetUnfolderBase]: For 67837/67837 co-relation queries the response was YES. [2024-06-27 21:36:55,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16030 conditions, 2648 events. 1614/2648 cut-off events. For 67837/67837 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 14838 event pairs, 450 based on Foata normal form. 2/2647 useless extension candidates. Maximal degree in co-relation 15972. Up to 2402 conditions per place. [2024-06-27 21:36:55,457 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 150 selfloop transitions, 21 changer transitions 0/178 dead transitions. [2024-06-27 21:36:55,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 178 transitions, 1956 flow [2024-06-27 21:36:55,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:36:55,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:36:55,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-27 21:36:55,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2024-06-27 21:36:55,459 INFO L175 Difference]: Start difference. First operand has 132 places, 154 transitions, 1493 flow. Second operand 7 states and 144 transitions. [2024-06-27 21:36:55,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 178 transitions, 1956 flow [2024-06-27 21:36:55,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 178 transitions, 1848 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 21:36:55,523 INFO L231 Difference]: Finished difference. Result has 133 places, 157 transitions, 1488 flow [2024-06-27 21:36:55,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1385, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1488, PETRI_PLACES=133, PETRI_TRANSITIONS=157} [2024-06-27 21:36:55,523 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-06-27 21:36:55,524 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 157 transitions, 1488 flow [2024-06-27 21:36:55,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:55,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:55,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:55,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 21:36:55,524 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:55,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:55,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1385651355, now seen corresponding path program 2 times [2024-06-27 21:36:55,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:55,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944806038] [2024-06-27 21:36:55,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:55,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:55,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:56,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:56,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:56,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944806038] [2024-06-27 21:36:56,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944806038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:56,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:56,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:36:56,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617197528] [2024-06-27 21:36:56,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:56,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:36:56,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:56,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:36:56,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:36:56,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:36:56,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 157 transitions, 1488 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:56,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:56,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:36:56,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:56,685 INFO L124 PetriNetUnfolderBase]: 1640/2699 cut-off events. [2024-06-27 21:36:56,685 INFO L125 PetriNetUnfolderBase]: For 72463/72463 co-relation queries the response was YES. [2024-06-27 21:36:56,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16371 conditions, 2699 events. 1640/2699 cut-off events. For 72463/72463 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 15286 event pairs, 461 based on Foata normal form. 2/2698 useless extension candidates. Maximal degree in co-relation 16312. Up to 2415 conditions per place. [2024-06-27 21:36:56,702 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 147 selfloop transitions, 30 changer transitions 0/184 dead transitions. [2024-06-27 21:36:56,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 184 transitions, 2089 flow [2024-06-27 21:36:56,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:36:56,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:36:56,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-27 21:36:56,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2024-06-27 21:36:56,703 INFO L175 Difference]: Start difference. First operand has 133 places, 157 transitions, 1488 flow. Second operand 7 states and 144 transitions. [2024-06-27 21:36:56,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 184 transitions, 2089 flow [2024-06-27 21:36:56,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 184 transitions, 2039 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 21:36:56,777 INFO L231 Difference]: Finished difference. Result has 137 places, 164 transitions, 1649 flow [2024-06-27 21:36:56,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1438, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1649, PETRI_PLACES=137, PETRI_TRANSITIONS=164} [2024-06-27 21:36:56,778 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-27 21:36:56,778 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 164 transitions, 1649 flow [2024-06-27 21:36:56,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:56,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:56,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:56,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 21:36:56,779 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:56,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:56,779 INFO L85 PathProgramCache]: Analyzing trace with hash 227415033, now seen corresponding path program 3 times [2024-06-27 21:36:56,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:56,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791181233] [2024-06-27 21:36:56,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:56,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:56,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:57,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:57,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:57,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791181233] [2024-06-27 21:36:57,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791181233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:57,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:57,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:36:57,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582998535] [2024-06-27 21:36:57,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:57,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:36:57,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:57,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:36:57,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:36:57,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:36:57,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 164 transitions, 1649 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:57,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:57,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:36:57,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:57,865 INFO L124 PetriNetUnfolderBase]: 1634/2686 cut-off events. [2024-06-27 21:36:57,865 INFO L125 PetriNetUnfolderBase]: For 75763/75763 co-relation queries the response was YES. [2024-06-27 21:36:57,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16469 conditions, 2686 events. 1634/2686 cut-off events. For 75763/75763 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 15162 event pairs, 466 based on Foata normal form. 2/2682 useless extension candidates. Maximal degree in co-relation 16408. Up to 2430 conditions per place. [2024-06-27 21:36:57,885 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 155 selfloop transitions, 21 changer transitions 0/183 dead transitions. [2024-06-27 21:36:57,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 183 transitions, 2067 flow [2024-06-27 21:36:57,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:36:57,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:36:57,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-27 21:36:57,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47959183673469385 [2024-06-27 21:36:57,886 INFO L175 Difference]: Start difference. First operand has 137 places, 164 transitions, 1649 flow. Second operand 7 states and 141 transitions. [2024-06-27 21:36:57,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 183 transitions, 2067 flow [2024-06-27 21:36:57,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 183 transitions, 1975 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-27 21:36:57,969 INFO L231 Difference]: Finished difference. Result has 140 places, 164 transitions, 1605 flow [2024-06-27 21:36:57,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1557, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1605, PETRI_PLACES=140, PETRI_TRANSITIONS=164} [2024-06-27 21:36:57,970 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 97 predicate places. [2024-06-27 21:36:57,970 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 164 transitions, 1605 flow [2024-06-27 21:36:57,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:57,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:57,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:57,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 21:36:57,971 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:57,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:57,971 INFO L85 PathProgramCache]: Analyzing trace with hash -884651079, now seen corresponding path program 4 times [2024-06-27 21:36:57,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:57,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627605108] [2024-06-27 21:36:57,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:57,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:57,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:58,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:58,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:58,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627605108] [2024-06-27 21:36:58,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627605108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:58,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:58,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:36:58,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441639985] [2024-06-27 21:36:58,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:58,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:36:58,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:58,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:36:58,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:36:58,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:36:58,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 164 transitions, 1605 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:58,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:58,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:36:58,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:59,090 INFO L124 PetriNetUnfolderBase]: 1618/2664 cut-off events. [2024-06-27 21:36:59,091 INFO L125 PetriNetUnfolderBase]: For 78179/78179 co-relation queries the response was YES. [2024-06-27 21:36:59,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16215 conditions, 2664 events. 1618/2664 cut-off events. For 78179/78179 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 15081 event pairs, 459 based on Foata normal form. 4/2662 useless extension candidates. Maximal degree in co-relation 16153. Up to 2356 conditions per place. [2024-06-27 21:36:59,109 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 143 selfloop transitions, 31 changer transitions 0/181 dead transitions. [2024-06-27 21:36:59,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 181 transitions, 2017 flow [2024-06-27 21:36:59,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:36:59,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:36:59,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-27 21:36:59,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-06-27 21:36:59,110 INFO L175 Difference]: Start difference. First operand has 140 places, 164 transitions, 1605 flow. Second operand 7 states and 142 transitions. [2024-06-27 21:36:59,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 181 transitions, 2017 flow [2024-06-27 21:36:59,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 181 transitions, 1922 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 21:36:59,198 INFO L231 Difference]: Finished difference. Result has 140 places, 164 transitions, 1580 flow [2024-06-27 21:36:59,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1510, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1580, PETRI_PLACES=140, PETRI_TRANSITIONS=164} [2024-06-27 21:36:59,199 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 97 predicate places. [2024-06-27 21:36:59,199 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 164 transitions, 1580 flow [2024-06-27 21:36:59,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:59,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:59,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:59,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 21:36:59,199 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:59,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:59,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1171336187, now seen corresponding path program 5 times [2024-06-27 21:36:59,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:59,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712453160] [2024-06-27 21:36:59,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:59,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:59,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:59,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:59,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712453160] [2024-06-27 21:36:59,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712453160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:59,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:59,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:36:59,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205760544] [2024-06-27 21:36:59,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:59,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:36:59,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:59,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:36:59,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:36:59,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:36:59,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 164 transitions, 1580 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:59,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:59,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:36:59,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:00,338 INFO L124 PetriNetUnfolderBase]: 1638/2693 cut-off events. [2024-06-27 21:37:00,338 INFO L125 PetriNetUnfolderBase]: For 82210/82210 co-relation queries the response was YES. [2024-06-27 21:37:00,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16481 conditions, 2693 events. 1638/2693 cut-off events. For 82210/82210 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 15247 event pairs, 471 based on Foata normal form. 4/2689 useless extension candidates. Maximal degree in co-relation 16418. Up to 2268 conditions per place. [2024-06-27 21:37:00,358 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 123 selfloop transitions, 54 changer transitions 0/184 dead transitions. [2024-06-27 21:37:00,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 184 transitions, 2119 flow [2024-06-27 21:37:00,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:37:00,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:37:00,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-27 21:37:00,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2024-06-27 21:37:00,359 INFO L175 Difference]: Start difference. First operand has 140 places, 164 transitions, 1580 flow. Second operand 7 states and 144 transitions. [2024-06-27 21:37:00,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 184 transitions, 2119 flow [2024-06-27 21:37:00,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 184 transitions, 2031 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 21:37:00,440 INFO L231 Difference]: Finished difference. Result has 141 places, 168 transitions, 1666 flow [2024-06-27 21:37:00,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1492, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1666, PETRI_PLACES=141, PETRI_TRANSITIONS=168} [2024-06-27 21:37:00,440 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-27 21:37:00,441 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 168 transitions, 1666 flow [2024-06-27 21:37:00,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:00,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:00,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:00,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 21:37:00,441 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:00,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:00,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1812856731, now seen corresponding path program 6 times [2024-06-27 21:37:00,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:00,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803676012] [2024-06-27 21:37:00,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:00,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:00,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:01,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:01,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:01,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803676012] [2024-06-27 21:37:01,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803676012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:01,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:01,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:37:01,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847662409] [2024-06-27 21:37:01,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:01,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:37:01,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:01,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:37:01,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:37:01,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:37:01,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 168 transitions, 1666 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:01,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:01,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:37:01,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:01,476 INFO L124 PetriNetUnfolderBase]: 1622/2673 cut-off events. [2024-06-27 21:37:01,476 INFO L125 PetriNetUnfolderBase]: For 84090/84090 co-relation queries the response was YES. [2024-06-27 21:37:01,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16415 conditions, 2673 events. 1622/2673 cut-off events. For 84090/84090 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 15153 event pairs, 464 based on Foata normal form. 4/2669 useless extension candidates. Maximal degree in co-relation 16351. Up to 2255 conditions per place. [2024-06-27 21:37:01,495 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 119 selfloop transitions, 57 changer transitions 0/183 dead transitions. [2024-06-27 21:37:01,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 183 transitions, 2080 flow [2024-06-27 21:37:01,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:37:01,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:37:01,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-27 21:37:01,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48639455782312924 [2024-06-27 21:37:01,496 INFO L175 Difference]: Start difference. First operand has 141 places, 168 transitions, 1666 flow. Second operand 7 states and 143 transitions. [2024-06-27 21:37:01,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 183 transitions, 2080 flow [2024-06-27 21:37:01,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 183 transitions, 1954 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 21:37:01,592 INFO L231 Difference]: Finished difference. Result has 144 places, 168 transitions, 1661 flow [2024-06-27 21:37:01,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1540, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1661, PETRI_PLACES=144, PETRI_TRANSITIONS=168} [2024-06-27 21:37:01,592 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-27 21:37:01,592 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 168 transitions, 1661 flow [2024-06-27 21:37:01,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:01,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:01,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:01,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 21:37:01,593 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:01,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:01,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1179915995, now seen corresponding path program 1 times [2024-06-27 21:37:01,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:01,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581845141] [2024-06-27 21:37:01,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:01,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:01,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:02,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:02,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:02,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581845141] [2024-06-27 21:37:02,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581845141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:02,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:02,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:37:02,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020952958] [2024-06-27 21:37:02,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:02,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:37:02,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:02,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:37:02,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:37:02,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-27 21:37:02,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 168 transitions, 1661 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:02,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:02,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-27 21:37:02,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:02,897 INFO L124 PetriNetUnfolderBase]: 1513/2542 cut-off events. [2024-06-27 21:37:02,897 INFO L125 PetriNetUnfolderBase]: For 85652/85675 co-relation queries the response was YES. [2024-06-27 21:37:02,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15664 conditions, 2542 events. 1513/2542 cut-off events. For 85652/85675 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 14745 event pairs, 448 based on Foata normal form. 2/2519 useless extension candidates. Maximal degree in co-relation 15599. Up to 2141 conditions per place. [2024-06-27 21:37:02,919 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 110 selfloop transitions, 42 changer transitions 0/182 dead transitions. [2024-06-27 21:37:02,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 182 transitions, 2027 flow [2024-06-27 21:37:02,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:02,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:02,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 21:37:02,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 21:37:02,920 INFO L175 Difference]: Start difference. First operand has 144 places, 168 transitions, 1661 flow. Second operand 8 states and 160 transitions. [2024-06-27 21:37:02,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 182 transitions, 2027 flow [2024-06-27 21:37:03,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 182 transitions, 1823 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-27 21:37:03,004 INFO L231 Difference]: Finished difference. Result has 144 places, 171 transitions, 1587 flow [2024-06-27 21:37:03,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1457, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1587, PETRI_PLACES=144, PETRI_TRANSITIONS=171} [2024-06-27 21:37:03,005 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-27 21:37:03,005 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 171 transitions, 1587 flow [2024-06-27 21:37:03,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:03,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:03,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:03,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 21:37:03,006 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:03,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:03,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1224239451, now seen corresponding path program 1 times [2024-06-27 21:37:03,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:03,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651816346] [2024-06-27 21:37:03,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:03,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:03,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:03,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:03,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:03,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651816346] [2024-06-27 21:37:03,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651816346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:03,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:03,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:37:03,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967624293] [2024-06-27 21:37:03,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:03,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:37:03,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:03,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:37:03,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:37:03,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:37:03,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 171 transitions, 1587 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:03,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:03,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:37:03,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:04,224 INFO L124 PetriNetUnfolderBase]: 1613/2661 cut-off events. [2024-06-27 21:37:04,224 INFO L125 PetriNetUnfolderBase]: For 87083/87085 co-relation queries the response was YES. [2024-06-27 21:37:04,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16442 conditions, 2661 events. 1613/2661 cut-off events. For 87083/87085 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 15127 event pairs, 453 based on Foata normal form. 1/2660 useless extension candidates. Maximal degree in co-relation 16377. Up to 2439 conditions per place. [2024-06-27 21:37:04,248 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 169 selfloop transitions, 14 changer transitions 0/190 dead transitions. [2024-06-27 21:37:04,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 190 transitions, 2053 flow [2024-06-27 21:37:04,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:37:04,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:37:04,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-27 21:37:04,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2024-06-27 21:37:04,250 INFO L175 Difference]: Start difference. First operand has 144 places, 171 transitions, 1587 flow. Second operand 7 states and 138 transitions. [2024-06-27 21:37:04,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 190 transitions, 2053 flow [2024-06-27 21:37:04,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 190 transitions, 1949 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 21:37:04,357 INFO L231 Difference]: Finished difference. Result has 145 places, 174 transitions, 1575 flow [2024-06-27 21:37:04,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1483, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1575, PETRI_PLACES=145, PETRI_TRANSITIONS=174} [2024-06-27 21:37:04,358 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-27 21:37:04,358 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 174 transitions, 1575 flow [2024-06-27 21:37:04,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:04,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:04,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:04,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 21:37:04,358 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:04,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:04,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1229007995, now seen corresponding path program 1 times [2024-06-27 21:37:04,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:04,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285312431] [2024-06-27 21:37:04,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:04,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:04,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:05,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:05,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:05,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285312431] [2024-06-27 21:37:05,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285312431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:05,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:05,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:05,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869688956] [2024-06-27 21:37:05,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:05,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:05,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:05,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:05,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:05,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:37:05,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 174 transitions, 1575 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:05,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:05,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:37:05,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:05,647 INFO L124 PetriNetUnfolderBase]: 1623/2682 cut-off events. [2024-06-27 21:37:05,648 INFO L125 PetriNetUnfolderBase]: For 92457/92457 co-relation queries the response was YES. [2024-06-27 21:37:05,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16757 conditions, 2682 events. 1623/2682 cut-off events. For 92457/92457 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 15248 event pairs, 446 based on Foata normal form. 2/2678 useless extension candidates. Maximal degree in co-relation 16691. Up to 2391 conditions per place. [2024-06-27 21:37:05,669 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 167 selfloop transitions, 34 changer transitions 0/208 dead transitions. [2024-06-27 21:37:05,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 208 transitions, 2213 flow [2024-06-27 21:37:05,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:05,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:05,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 21:37:05,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-27 21:37:05,670 INFO L175 Difference]: Start difference. First operand has 145 places, 174 transitions, 1575 flow. Second operand 8 states and 157 transitions. [2024-06-27 21:37:05,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 208 transitions, 2213 flow [2024-06-27 21:37:05,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 208 transitions, 2143 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 21:37:05,767 INFO L231 Difference]: Finished difference. Result has 150 places, 191 transitions, 1810 flow [2024-06-27 21:37:05,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1505, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1810, PETRI_PLACES=150, PETRI_TRANSITIONS=191} [2024-06-27 21:37:05,767 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-27 21:37:05,767 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 191 transitions, 1810 flow [2024-06-27 21:37:05,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:05,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:05,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:05,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 21:37:05,768 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:05,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:05,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1171352059, now seen corresponding path program 2 times [2024-06-27 21:37:05,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:05,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889414465] [2024-06-27 21:37:05,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:05,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:05,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:06,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:06,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:06,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889414465] [2024-06-27 21:37:06,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889414465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:06,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:06,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:06,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347608829] [2024-06-27 21:37:06,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:06,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:06,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:06,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:06,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:06,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:37:06,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 191 transitions, 1810 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:06,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:06,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:37:06,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:07,243 INFO L124 PetriNetUnfolderBase]: 1633/2695 cut-off events. [2024-06-27 21:37:07,244 INFO L125 PetriNetUnfolderBase]: For 97930/97930 co-relation queries the response was YES. [2024-06-27 21:37:07,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17404 conditions, 2695 events. 1633/2695 cut-off events. For 97930/97930 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 15338 event pairs, 450 based on Foata normal form. 2/2689 useless extension candidates. Maximal degree in co-relation 17335. Up to 2342 conditions per place. [2024-06-27 21:37:07,263 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 168 selfloop transitions, 52 changer transitions 0/227 dead transitions. [2024-06-27 21:37:07,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 227 transitions, 2497 flow [2024-06-27 21:37:07,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:07,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:07,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 21:37:07,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-27 21:37:07,264 INFO L175 Difference]: Start difference. First operand has 150 places, 191 transitions, 1810 flow. Second operand 8 states and 157 transitions. [2024-06-27 21:37:07,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 227 transitions, 2497 flow [2024-06-27 21:37:07,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 227 transitions, 2393 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-27 21:37:07,380 INFO L231 Difference]: Finished difference. Result has 155 places, 211 transitions, 2064 flow [2024-06-27 21:37:07,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1718, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2064, PETRI_PLACES=155, PETRI_TRANSITIONS=211} [2024-06-27 21:37:07,380 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-27 21:37:07,381 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 211 transitions, 2064 flow [2024-06-27 21:37:07,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:07,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:07,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:07,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 21:37:07,381 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:07,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:07,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1235225017, now seen corresponding path program 3 times [2024-06-27 21:37:07,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:07,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053906831] [2024-06-27 21:37:07,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:07,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:07,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:08,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:08,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:08,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053906831] [2024-06-27 21:37:08,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053906831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:08,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:08,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:08,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943571480] [2024-06-27 21:37:08,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:08,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:08,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:08,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:08,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:08,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:37:08,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 211 transitions, 2064 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:08,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:08,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:37:08,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:08,914 INFO L124 PetriNetUnfolderBase]: 1661/2734 cut-off events. [2024-06-27 21:37:08,915 INFO L125 PetriNetUnfolderBase]: For 103207/103207 co-relation queries the response was YES. [2024-06-27 21:37:08,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18046 conditions, 2734 events. 1661/2734 cut-off events. For 103207/103207 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 15406 event pairs, 454 based on Foata normal form. 4/2730 useless extension candidates. Maximal degree in co-relation 17975. Up to 2264 conditions per place. [2024-06-27 21:37:08,936 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 124 selfloop transitions, 107 changer transitions 0/238 dead transitions. [2024-06-27 21:37:08,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 238 transitions, 2827 flow [2024-06-27 21:37:08,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:37:08,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:37:08,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-27 21:37:08,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47883597883597884 [2024-06-27 21:37:08,938 INFO L175 Difference]: Start difference. First operand has 155 places, 211 transitions, 2064 flow. Second operand 9 states and 181 transitions. [2024-06-27 21:37:08,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 238 transitions, 2827 flow [2024-06-27 21:37:09,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 238 transitions, 2717 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-27 21:37:09,078 INFO L231 Difference]: Finished difference. Result has 162 places, 222 transitions, 2386 flow [2024-06-27 21:37:09,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1958, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2386, PETRI_PLACES=162, PETRI_TRANSITIONS=222} [2024-06-27 21:37:09,078 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-27 21:37:09,078 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 222 transitions, 2386 flow [2024-06-27 21:37:09,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:09,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:09,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:09,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 21:37:09,079 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:09,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:09,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1468088804, now seen corresponding path program 1 times [2024-06-27 21:37:09,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:09,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186221501] [2024-06-27 21:37:09,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:09,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:09,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:09,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:09,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186221501] [2024-06-27 21:37:09,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186221501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:09,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:09,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:37:09,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244372338] [2024-06-27 21:37:09,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:09,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:37:09,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:09,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:37:09,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:37:09,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:37:09,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 222 transitions, 2386 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:09,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:09,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:37:09,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:10,681 INFO L124 PetriNetUnfolderBase]: 1784/2971 cut-off events. [2024-06-27 21:37:10,682 INFO L125 PetriNetUnfolderBase]: For 114630/114632 co-relation queries the response was YES. [2024-06-27 21:37:10,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19944 conditions, 2971 events. 1784/2971 cut-off events. For 114630/114632 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17319 event pairs, 433 based on Foata normal form. 12/2979 useless extension candidates. Maximal degree in co-relation 19870. Up to 2281 conditions per place. [2024-06-27 21:37:10,707 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 213 selfloop transitions, 47 changer transitions 0/267 dead transitions. [2024-06-27 21:37:10,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 267 transitions, 3156 flow [2024-06-27 21:37:10,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:37:10,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:37:10,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-27 21:37:10,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132275132275133 [2024-06-27 21:37:10,708 INFO L175 Difference]: Start difference. First operand has 162 places, 222 transitions, 2386 flow. Second operand 9 states and 194 transitions. [2024-06-27 21:37:10,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 267 transitions, 3156 flow [2024-06-27 21:37:10,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 267 transitions, 2949 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-27 21:37:10,879 INFO L231 Difference]: Finished difference. Result has 168 places, 230 transitions, 2403 flow [2024-06-27 21:37:10,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2179, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2403, PETRI_PLACES=168, PETRI_TRANSITIONS=230} [2024-06-27 21:37:10,880 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-27 21:37:10,880 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 230 transitions, 2403 flow [2024-06-27 21:37:10,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:10,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:10,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:10,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 21:37:10,881 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:10,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:10,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1176844738, now seen corresponding path program 2 times [2024-06-27 21:37:10,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:10,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750104376] [2024-06-27 21:37:10,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:10,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:10,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:11,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:11,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:11,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750104376] [2024-06-27 21:37:11,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750104376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:11,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:11,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:37:11,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832824102] [2024-06-27 21:37:11,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:11,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:37:11,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:11,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:37:11,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:37:11,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:37:11,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 230 transitions, 2403 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:11,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:11,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:37:11,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:12,688 INFO L124 PetriNetUnfolderBase]: 1894/3181 cut-off events. [2024-06-27 21:37:12,688 INFO L125 PetriNetUnfolderBase]: For 122267/122267 co-relation queries the response was YES. [2024-06-27 21:37:12,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21259 conditions, 3181 events. 1894/3181 cut-off events. For 122267/122267 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 19047 event pairs, 469 based on Foata normal form. 12/3183 useless extension candidates. Maximal degree in co-relation 21181. Up to 2554 conditions per place. [2024-06-27 21:37:12,715 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 214 selfloop transitions, 49 changer transitions 0/270 dead transitions. [2024-06-27 21:37:12,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 270 transitions, 3152 flow [2024-06-27 21:37:12,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:37:12,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:37:12,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-27 21:37:12,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2024-06-27 21:37:12,716 INFO L175 Difference]: Start difference. First operand has 168 places, 230 transitions, 2403 flow. Second operand 9 states and 192 transitions. [2024-06-27 21:37:12,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 270 transitions, 3152 flow [2024-06-27 21:37:12,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 270 transitions, 3056 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 21:37:12,917 INFO L231 Difference]: Finished difference. Result has 175 places, 236 transitions, 2518 flow [2024-06-27 21:37:12,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2313, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2518, PETRI_PLACES=175, PETRI_TRANSITIONS=236} [2024-06-27 21:37:12,918 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 132 predicate places. [2024-06-27 21:37:12,918 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 236 transitions, 2518 flow [2024-06-27 21:37:12,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:12,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:12,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:12,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 21:37:12,918 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:12,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:12,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1913469920, now seen corresponding path program 3 times [2024-06-27 21:37:12,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:12,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134375377] [2024-06-27 21:37:12,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:12,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:12,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:13,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:13,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:13,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134375377] [2024-06-27 21:37:13,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134375377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:13,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:13,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:37:13,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651140943] [2024-06-27 21:37:13,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:13,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:37:13,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:13,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:37:13,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:37:14,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:37:14,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 236 transitions, 2518 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:14,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:14,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:37:14,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:14,772 INFO L124 PetriNetUnfolderBase]: 1976/3333 cut-off events. [2024-06-27 21:37:14,772 INFO L125 PetriNetUnfolderBase]: For 129780/129780 co-relation queries the response was YES. [2024-06-27 21:37:14,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22252 conditions, 3333 events. 1976/3333 cut-off events. For 129780/129780 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 20250 event pairs, 494 based on Foata normal form. 12/3335 useless extension candidates. Maximal degree in co-relation 22171. Up to 2696 conditions per place. [2024-06-27 21:37:14,802 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 214 selfloop transitions, 53 changer transitions 0/274 dead transitions. [2024-06-27 21:37:14,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 274 transitions, 3260 flow [2024-06-27 21:37:14,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:37:14,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:37:14,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-27 21:37:14,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052910052910053 [2024-06-27 21:37:14,803 INFO L175 Difference]: Start difference. First operand has 175 places, 236 transitions, 2518 flow. Second operand 9 states and 191 transitions. [2024-06-27 21:37:14,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 274 transitions, 3260 flow [2024-06-27 21:37:14,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 274 transitions, 3153 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 21:37:14,956 INFO L231 Difference]: Finished difference. Result has 181 places, 240 transitions, 2603 flow [2024-06-27 21:37:14,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2413, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2603, PETRI_PLACES=181, PETRI_TRANSITIONS=240} [2024-06-27 21:37:14,957 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-27 21:37:14,957 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 240 transitions, 2603 flow [2024-06-27 21:37:14,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:14,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:14,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:14,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 21:37:14,957 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:14,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:14,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1466029886, now seen corresponding path program 4 times [2024-06-27 21:37:14,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:14,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532707381] [2024-06-27 21:37:14,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:14,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:14,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:15,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:15,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:15,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532707381] [2024-06-27 21:37:15,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532707381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:15,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:15,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:37:15,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754759879] [2024-06-27 21:37:15,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:15,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:37:15,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:15,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:37:15,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:37:16,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:37:16,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 240 transitions, 2603 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:16,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:16,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:37:16,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:16,709 INFO L124 PetriNetUnfolderBase]: 1956/3301 cut-off events. [2024-06-27 21:37:16,709 INFO L125 PetriNetUnfolderBase]: For 128303/128303 co-relation queries the response was YES. [2024-06-27 21:37:16,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21666 conditions, 3301 events. 1956/3301 cut-off events. For 128303/128303 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 20012 event pairs, 430 based on Foata normal form. 12/3303 useless extension candidates. Maximal degree in co-relation 21583. Up to 2104 conditions per place. [2024-06-27 21:37:16,738 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 204 selfloop transitions, 63 changer transitions 0/274 dead transitions. [2024-06-27 21:37:16,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 274 transitions, 3233 flow [2024-06-27 21:37:16,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:37:16,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:37:16,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-27 21:37:16,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026455026455027 [2024-06-27 21:37:16,744 INFO L175 Difference]: Start difference. First operand has 181 places, 240 transitions, 2603 flow. Second operand 9 states and 190 transitions. [2024-06-27 21:37:16,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 274 transitions, 3233 flow [2024-06-27 21:37:16,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 274 transitions, 3130 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 21:37:16,901 INFO L231 Difference]: Finished difference. Result has 185 places, 239 transitions, 2586 flow [2024-06-27 21:37:16,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2456, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2586, PETRI_PLACES=185, PETRI_TRANSITIONS=239} [2024-06-27 21:37:16,901 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-27 21:37:16,902 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 239 transitions, 2586 flow [2024-06-27 21:37:16,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:16,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:16,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:16,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 21:37:16,902 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:16,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:16,903 INFO L85 PathProgramCache]: Analyzing trace with hash -2076773501, now seen corresponding path program 1 times [2024-06-27 21:37:16,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:16,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552265190] [2024-06-27 21:37:16,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:16,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:16,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:17,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:17,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:17,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552265190] [2024-06-27 21:37:17,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552265190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:17,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:17,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:17,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148872240] [2024-06-27 21:37:17,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:17,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:17,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:17,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:17,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:17,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-27 21:37:17,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 239 transitions, 2586 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:17,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:17,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-27 21:37:17,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:18,398 INFO L124 PetriNetUnfolderBase]: 1897/3232 cut-off events. [2024-06-27 21:37:18,399 INFO L125 PetriNetUnfolderBase]: For 137672/137702 co-relation queries the response was YES. [2024-06-27 21:37:18,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21666 conditions, 3232 events. 1897/3232 cut-off events. For 137672/137702 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 19865 event pairs, 471 based on Foata normal form. 17/3212 useless extension candidates. Maximal degree in co-relation 21582. Up to 2611 conditions per place. [2024-06-27 21:37:18,427 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 174 selfloop transitions, 43 changer transitions 0/260 dead transitions. [2024-06-27 21:37:18,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 260 transitions, 3224 flow [2024-06-27 21:37:18,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:18,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:18,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-27 21:37:18,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-06-27 21:37:18,428 INFO L175 Difference]: Start difference. First operand has 185 places, 239 transitions, 2586 flow. Second operand 8 states and 163 transitions. [2024-06-27 21:37:18,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 260 transitions, 3224 flow [2024-06-27 21:37:18,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 260 transitions, 3055 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-27 21:37:18,635 INFO L231 Difference]: Finished difference. Result has 185 places, 241 transitions, 2545 flow [2024-06-27 21:37:18,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2417, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2545, PETRI_PLACES=185, PETRI_TRANSITIONS=241} [2024-06-27 21:37:18,636 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-27 21:37:18,636 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 241 transitions, 2545 flow [2024-06-27 21:37:18,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:18,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:18,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:18,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 21:37:18,636 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:18,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:18,636 INFO L85 PathProgramCache]: Analyzing trace with hash -2077308251, now seen corresponding path program 2 times [2024-06-27 21:37:18,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:18,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322467650] [2024-06-27 21:37:18,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:18,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:18,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:19,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:19,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:19,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322467650] [2024-06-27 21:37:19,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322467650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:19,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:19,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:19,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734867285] [2024-06-27 21:37:19,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:19,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:19,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:19,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:19,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:19,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-27 21:37:19,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 241 transitions, 2545 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:19,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:19,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-27 21:37:19,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:20,049 INFO L124 PetriNetUnfolderBase]: 1940/3292 cut-off events. [2024-06-27 21:37:20,049 INFO L125 PetriNetUnfolderBase]: For 143965/143995 co-relation queries the response was YES. [2024-06-27 21:37:20,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21795 conditions, 3292 events. 1940/3292 cut-off events. For 143965/143995 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 20238 event pairs, 477 based on Foata normal form. 18/3272 useless extension candidates. Maximal degree in co-relation 21711. Up to 2763 conditions per place. [2024-06-27 21:37:20,081 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 173 selfloop transitions, 44 changer transitions 0/260 dead transitions. [2024-06-27 21:37:20,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 260 transitions, 3077 flow [2024-06-27 21:37:20,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:20,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:20,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 21:37:20,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 21:37:20,084 INFO L175 Difference]: Start difference. First operand has 185 places, 241 transitions, 2545 flow. Second operand 8 states and 160 transitions. [2024-06-27 21:37:20,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 260 transitions, 3077 flow [2024-06-27 21:37:20,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 260 transitions, 3017 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 21:37:20,292 INFO L231 Difference]: Finished difference. Result has 189 places, 245 transitions, 2618 flow [2024-06-27 21:37:20,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2488, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2618, PETRI_PLACES=189, PETRI_TRANSITIONS=245} [2024-06-27 21:37:20,293 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-27 21:37:20,293 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 245 transitions, 2618 flow [2024-06-27 21:37:20,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:20,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:20,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:20,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 21:37:20,293 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:20,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:20,294 INFO L85 PathProgramCache]: Analyzing trace with hash -378598523, now seen corresponding path program 3 times [2024-06-27 21:37:20,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:20,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966469048] [2024-06-27 21:37:20,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:20,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:20,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:21,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:21,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:21,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966469048] [2024-06-27 21:37:21,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966469048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:21,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:21,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:21,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439076380] [2024-06-27 21:37:21,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:21,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:21,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:21,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:21,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:21,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-27 21:37:21,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 245 transitions, 2618 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:21,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:21,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-27 21:37:21,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:21,811 INFO L124 PetriNetUnfolderBase]: 1917/3259 cut-off events. [2024-06-27 21:37:21,811 INFO L125 PetriNetUnfolderBase]: For 139928/139949 co-relation queries the response was YES. [2024-06-27 21:37:21,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21368 conditions, 3259 events. 1917/3259 cut-off events. For 139928/139949 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 20022 event pairs, 468 based on Foata normal form. 13/3234 useless extension candidates. Maximal degree in co-relation 21282. Up to 2738 conditions per place. [2024-06-27 21:37:21,842 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 178 selfloop transitions, 39 changer transitions 0/260 dead transitions. [2024-06-27 21:37:21,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 260 transitions, 3112 flow [2024-06-27 21:37:21,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:21,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:21,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 21:37:21,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 21:37:21,843 INFO L175 Difference]: Start difference. First operand has 189 places, 245 transitions, 2618 flow. Second operand 8 states and 160 transitions. [2024-06-27 21:37:21,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 260 transitions, 3112 flow [2024-06-27 21:37:22,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 260 transitions, 3030 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 21:37:22,147 INFO L231 Difference]: Finished difference. Result has 193 places, 245 transitions, 2619 flow [2024-06-27 21:37:22,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2536, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2619, PETRI_PLACES=193, PETRI_TRANSITIONS=245} [2024-06-27 21:37:22,147 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-27 21:37:22,148 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 245 transitions, 2619 flow [2024-06-27 21:37:22,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:22,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:22,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:22,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 21:37:22,148 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:22,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:22,149 INFO L85 PathProgramCache]: Analyzing trace with hash -823513181, now seen corresponding path program 1 times [2024-06-27 21:37:22,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:22,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566969915] [2024-06-27 21:37:22,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:22,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:22,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:22,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:22,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:22,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566969915] [2024-06-27 21:37:22,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566969915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:22,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:22,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:22,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099957899] [2024-06-27 21:37:22,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:22,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:22,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:22,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:22,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:23,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:37:23,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 245 transitions, 2619 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:23,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:23,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:37:23,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:23,603 INFO L124 PetriNetUnfolderBase]: 2044/3444 cut-off events. [2024-06-27 21:37:23,603 INFO L125 PetriNetUnfolderBase]: For 136024/136024 co-relation queries the response was YES. [2024-06-27 21:37:23,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22345 conditions, 3444 events. 2044/3444 cut-off events. For 136024/136024 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 21071 event pairs, 493 based on Foata normal form. 2/3440 useless extension candidates. Maximal degree in co-relation 22258. Up to 3061 conditions per place. [2024-06-27 21:37:23,636 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 228 selfloop transitions, 38 changer transitions 0/273 dead transitions. [2024-06-27 21:37:23,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 273 transitions, 3445 flow [2024-06-27 21:37:23,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:23,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:23,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 21:37:23,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 21:37:23,638 INFO L175 Difference]: Start difference. First operand has 193 places, 245 transitions, 2619 flow. Second operand 8 states and 160 transitions. [2024-06-27 21:37:23,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 273 transitions, 3445 flow [2024-06-27 21:37:23,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 273 transitions, 3338 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 21:37:23,843 INFO L231 Difference]: Finished difference. Result has 194 places, 253 transitions, 2755 flow [2024-06-27 21:37:23,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2512, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2755, PETRI_PLACES=194, PETRI_TRANSITIONS=253} [2024-06-27 21:37:23,843 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-27 21:37:23,844 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 253 transitions, 2755 flow [2024-06-27 21:37:23,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:23,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:23,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:23,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 21:37:23,844 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:23,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:23,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1653886073, now seen corresponding path program 1 times [2024-06-27 21:37:23,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:23,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525640747] [2024-06-27 21:37:23,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:23,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:23,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:24,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:24,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:24,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525640747] [2024-06-27 21:37:24,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525640747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:24,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:24,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:37:24,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187697604] [2024-06-27 21:37:24,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:24,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:37:24,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:24,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:37:24,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:37:24,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:37:24,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 253 transitions, 2755 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:24,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:24,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:37:24,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:25,454 INFO L124 PetriNetUnfolderBase]: 2060/3476 cut-off events. [2024-06-27 21:37:25,454 INFO L125 PetriNetUnfolderBase]: For 146114/146114 co-relation queries the response was YES. [2024-06-27 21:37:25,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23002 conditions, 3476 events. 2060/3476 cut-off events. For 146114/146114 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 21383 event pairs, 496 based on Foata normal form. 4/3474 useless extension candidates. Maximal degree in co-relation 22913. Up to 3102 conditions per place. [2024-06-27 21:37:25,487 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 231 selfloop transitions, 37 changer transitions 0/275 dead transitions. [2024-06-27 21:37:25,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 275 transitions, 3420 flow [2024-06-27 21:37:25,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:37:25,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:37:25,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 21:37:25,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-27 21:37:25,488 INFO L175 Difference]: Start difference. First operand has 194 places, 253 transitions, 2755 flow. Second operand 9 states and 173 transitions. [2024-06-27 21:37:25,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 275 transitions, 3420 flow [2024-06-27 21:37:25,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 275 transitions, 3293 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-27 21:37:25,828 INFO L231 Difference]: Finished difference. Result has 199 places, 256 transitions, 2782 flow [2024-06-27 21:37:25,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2628, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2782, PETRI_PLACES=199, PETRI_TRANSITIONS=256} [2024-06-27 21:37:25,829 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-27 21:37:25,829 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 256 transitions, 2782 flow [2024-06-27 21:37:25,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:25,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:25,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:25,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 21:37:25,832 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:25,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:25,832 INFO L85 PathProgramCache]: Analyzing trace with hash -2077083687, now seen corresponding path program 2 times [2024-06-27 21:37:25,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:25,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613837886] [2024-06-27 21:37:25,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:25,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:26,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:26,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:26,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613837886] [2024-06-27 21:37:26,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613837886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:26,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:26,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:37:26,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557960226] [2024-06-27 21:37:26,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:26,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:37:26,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:26,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:37:26,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:37:26,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:37:26,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 256 transitions, 2782 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:26,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:26,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:37:26,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:27,457 INFO L124 PetriNetUnfolderBase]: 2089/3520 cut-off events. [2024-06-27 21:37:27,458 INFO L125 PetriNetUnfolderBase]: For 156239/156239 co-relation queries the response was YES. [2024-06-27 21:37:27,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23723 conditions, 3520 events. 2089/3520 cut-off events. For 156239/156239 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 21690 event pairs, 494 based on Foata normal form. 4/3516 useless extension candidates. Maximal degree in co-relation 23632. Up to 3010 conditions per place. [2024-06-27 21:37:27,503 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 200 selfloop transitions, 81 changer transitions 0/288 dead transitions. [2024-06-27 21:37:27,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 288 transitions, 3708 flow [2024-06-27 21:37:27,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:37:27,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:37:27,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-27 21:37:27,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-27 21:37:27,505 INFO L175 Difference]: Start difference. First operand has 199 places, 256 transitions, 2782 flow. Second operand 9 states and 176 transitions. [2024-06-27 21:37:27,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 288 transitions, 3708 flow [2024-06-27 21:37:27,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 288 transitions, 3576 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-27 21:37:27,751 INFO L231 Difference]: Finished difference. Result has 204 places, 269 transitions, 3098 flow [2024-06-27 21:37:27,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2650, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3098, PETRI_PLACES=204, PETRI_TRANSITIONS=269} [2024-06-27 21:37:27,751 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-27 21:37:27,752 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 269 transitions, 3098 flow [2024-06-27 21:37:27,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:27,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:27,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:27,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 21:37:27,753 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:27,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:27,753 INFO L85 PathProgramCache]: Analyzing trace with hash -2077092987, now seen corresponding path program 3 times [2024-06-27 21:37:27,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:27,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913441432] [2024-06-27 21:37:27,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:27,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:27,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:28,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:28,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:28,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913441432] [2024-06-27 21:37:28,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913441432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:28,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:28,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:37:28,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782657111] [2024-06-27 21:37:28,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:28,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:37:28,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:28,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:37:28,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:37:28,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:37:28,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 269 transitions, 3098 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:28,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:28,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:37:28,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:29,417 INFO L124 PetriNetUnfolderBase]: 2115/3554 cut-off events. [2024-06-27 21:37:29,417 INFO L125 PetriNetUnfolderBase]: For 164876/164876 co-relation queries the response was YES. [2024-06-27 21:37:29,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24549 conditions, 3554 events. 2115/3554 cut-off events. For 164876/164876 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 21873 event pairs, 507 based on Foata normal form. 4/3550 useless extension candidates. Maximal degree in co-relation 24454. Up to 3096 conditions per place. [2024-06-27 21:37:29,452 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 208 selfloop transitions, 78 changer transitions 0/293 dead transitions. [2024-06-27 21:37:29,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 293 transitions, 3844 flow [2024-06-27 21:37:29,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:37:29,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:37:29,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-27 21:37:29,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-27 21:37:29,453 INFO L175 Difference]: Start difference. First operand has 204 places, 269 transitions, 3098 flow. Second operand 9 states and 174 transitions. [2024-06-27 21:37:29,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 293 transitions, 3844 flow [2024-06-27 21:37:29,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 293 transitions, 3709 flow, removed 60 selfloop flow, removed 2 redundant places. [2024-06-27 21:37:29,738 INFO L231 Difference]: Finished difference. Result has 211 places, 276 transitions, 3247 flow [2024-06-27 21:37:29,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2983, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3247, PETRI_PLACES=211, PETRI_TRANSITIONS=276} [2024-06-27 21:37:29,738 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 168 predicate places. [2024-06-27 21:37:29,738 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 276 transitions, 3247 flow [2024-06-27 21:37:29,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:29,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:29,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:29,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 21:37:29,740 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:29,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:29,740 INFO L85 PathProgramCache]: Analyzing trace with hash -371925339, now seen corresponding path program 4 times [2024-06-27 21:37:29,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:29,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040058908] [2024-06-27 21:37:29,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:29,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:29,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:30,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:30,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:30,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040058908] [2024-06-27 21:37:30,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040058908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:30,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:30,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:37:30,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662517982] [2024-06-27 21:37:30,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:30,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:37:30,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:30,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:37:30,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:37:30,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:37:30,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 276 transitions, 3247 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:30,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:30,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:37:30,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:31,523 INFO L124 PetriNetUnfolderBase]: 2203/3686 cut-off events. [2024-06-27 21:37:31,523 INFO L125 PetriNetUnfolderBase]: For 199544/199544 co-relation queries the response was YES. [2024-06-27 21:37:31,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25781 conditions, 3686 events. 2203/3686 cut-off events. For 199544/199544 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 22671 event pairs, 518 based on Foata normal form. 24/3702 useless extension candidates. Maximal degree in co-relation 25684. Up to 3089 conditions per place. [2024-06-27 21:37:31,561 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 192 selfloop transitions, 101 changer transitions 0/300 dead transitions. [2024-06-27 21:37:31,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 300 transitions, 4054 flow [2024-06-27 21:37:31,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:37:31,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:37:31,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-27 21:37:31,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47883597883597884 [2024-06-27 21:37:31,563 INFO L175 Difference]: Start difference. First operand has 211 places, 276 transitions, 3247 flow. Second operand 9 states and 181 transitions. [2024-06-27 21:37:31,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 300 transitions, 4054 flow [2024-06-27 21:37:31,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 300 transitions, 3856 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 21:37:31,839 INFO L231 Difference]: Finished difference. Result has 214 places, 281 transitions, 3405 flow [2024-06-27 21:37:31,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3049, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3405, PETRI_PLACES=214, PETRI_TRANSITIONS=281} [2024-06-27 21:37:31,840 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-27 21:37:31,840 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 281 transitions, 3405 flow [2024-06-27 21:37:31,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:31,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:31,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:31,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 21:37:31,841 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:31,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:31,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1952177029, now seen corresponding path program 5 times [2024-06-27 21:37:31,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:31,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037989299] [2024-06-27 21:37:31,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:31,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:31,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:32,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:32,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:32,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037989299] [2024-06-27 21:37:32,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037989299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:32,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:32,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:37:32,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61202444] [2024-06-27 21:37:32,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:32,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:37:32,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:32,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:37:32,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:37:32,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:37:32,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 281 transitions, 3405 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:32,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:32,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:37:32,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:33,591 INFO L124 PetriNetUnfolderBase]: 2275/3798 cut-off events. [2024-06-27 21:37:33,592 INFO L125 PetriNetUnfolderBase]: For 209023/209023 co-relation queries the response was YES. [2024-06-27 21:37:33,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26868 conditions, 3798 events. 2275/3798 cut-off events. For 209023/209023 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 23344 event pairs, 524 based on Foata normal form. 26/3816 useless extension candidates. Maximal degree in co-relation 26770. Up to 3201 conditions per place. [2024-06-27 21:37:33,629 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 212 selfloop transitions, 88 changer transitions 0/307 dead transitions. [2024-06-27 21:37:33,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 307 transitions, 4262 flow [2024-06-27 21:37:33,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:37:33,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:37:33,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-27 21:37:33,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-27 21:37:33,630 INFO L175 Difference]: Start difference. First operand has 214 places, 281 transitions, 3405 flow. Second operand 9 states and 182 transitions. [2024-06-27 21:37:33,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 307 transitions, 4262 flow [2024-06-27 21:37:34,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 307 transitions, 3926 flow, removed 69 selfloop flow, removed 7 redundant places. [2024-06-27 21:37:34,008 INFO L231 Difference]: Finished difference. Result has 217 places, 288 transitions, 3451 flow [2024-06-27 21:37:34,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3081, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3451, PETRI_PLACES=217, PETRI_TRANSITIONS=288} [2024-06-27 21:37:34,009 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-06-27 21:37:34,009 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 288 transitions, 3451 flow [2024-06-27 21:37:34,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:34,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:34,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:34,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 21:37:34,010 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:34,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:34,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1843534768, now seen corresponding path program 1 times [2024-06-27 21:37:34,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:34,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120395081] [2024-06-27 21:37:34,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:34,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:34,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:34,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:34,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:34,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120395081] [2024-06-27 21:37:34,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120395081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:34,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:34,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:34,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682228800] [2024-06-27 21:37:34,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:34,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:34,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:34,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:34,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:34,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:37:34,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 288 transitions, 3451 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:34,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:34,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:37:34,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:35,479 INFO L124 PetriNetUnfolderBase]: 2285/3830 cut-off events. [2024-06-27 21:37:35,479 INFO L125 PetriNetUnfolderBase]: For 185922/185922 co-relation queries the response was YES. [2024-06-27 21:37:35,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26893 conditions, 3830 events. 2285/3830 cut-off events. For 185922/185922 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 23630 event pairs, 506 based on Foata normal form. 2/3830 useless extension candidates. Maximal degree in co-relation 26793. Up to 3474 conditions per place. [2024-06-27 21:37:35,519 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 290 selfloop transitions, 22 changer transitions 0/319 dead transitions. [2024-06-27 21:37:35,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 319 transitions, 4235 flow [2024-06-27 21:37:35,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:35,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:35,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-27 21:37:35,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-06-27 21:37:35,520 INFO L175 Difference]: Start difference. First operand has 217 places, 288 transitions, 3451 flow. Second operand 8 states and 163 transitions. [2024-06-27 21:37:35,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 319 transitions, 4235 flow [2024-06-27 21:37:35,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 319 transitions, 3978 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-27 21:37:35,893 INFO L231 Difference]: Finished difference. Result has 220 places, 292 transitions, 3319 flow [2024-06-27 21:37:35,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3194, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3319, PETRI_PLACES=220, PETRI_TRANSITIONS=292} [2024-06-27 21:37:35,893 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-27 21:37:35,894 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 292 transitions, 3319 flow [2024-06-27 21:37:35,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:35,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:35,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:35,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 21:37:35,894 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:35,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:35,894 INFO L85 PathProgramCache]: Analyzing trace with hash 337394554, now seen corresponding path program 2 times [2024-06-27 21:37:35,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:35,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538097981] [2024-06-27 21:37:35,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:35,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:35,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:36,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:36,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:36,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538097981] [2024-06-27 21:37:36,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538097981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:36,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:36,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:36,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491751333] [2024-06-27 21:37:36,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:36,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:36,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:36,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:36,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:36,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:37:36,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 292 transitions, 3319 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:36,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:36,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:37:36,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:37,417 INFO L124 PetriNetUnfolderBase]: 2305/3864 cut-off events. [2024-06-27 21:37:37,417 INFO L125 PetriNetUnfolderBase]: For 186878/186878 co-relation queries the response was YES. [2024-06-27 21:37:37,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27016 conditions, 3864 events. 2305/3864 cut-off events. For 186878/186878 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 23886 event pairs, 506 based on Foata normal form. 2/3864 useless extension candidates. Maximal degree in co-relation 26914. Up to 3488 conditions per place. [2024-06-27 21:37:37,458 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 292 selfloop transitions, 31 changer transitions 0/330 dead transitions. [2024-06-27 21:37:37,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 330 transitions, 4201 flow [2024-06-27 21:37:37,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:37:37,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:37:37,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-27 21:37:37,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47883597883597884 [2024-06-27 21:37:37,460 INFO L175 Difference]: Start difference. First operand has 220 places, 292 transitions, 3319 flow. Second operand 9 states and 181 transitions. [2024-06-27 21:37:37,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 330 transitions, 4201 flow [2024-06-27 21:37:37,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 330 transitions, 4116 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 21:37:37,850 INFO L231 Difference]: Finished difference. Result has 225 places, 301 transitions, 3453 flow [2024-06-27 21:37:37,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3234, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3453, PETRI_PLACES=225, PETRI_TRANSITIONS=301} [2024-06-27 21:37:37,851 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 182 predicate places. [2024-06-27 21:37:37,851 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 301 transitions, 3453 flow [2024-06-27 21:37:37,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:37,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:37,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:37,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 21:37:37,851 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:37,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:37,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1409663080, now seen corresponding path program 3 times [2024-06-27 21:37:37,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:37,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030543324] [2024-06-27 21:37:37,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:37,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:37,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:38,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:38,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:38,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030543324] [2024-06-27 21:37:38,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030543324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:38,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:38,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:38,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726408109] [2024-06-27 21:37:38,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:38,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:38,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:38,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:38,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:38,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:37:38,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 301 transitions, 3453 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:38,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:38,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:37:38,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:39,233 INFO L124 PetriNetUnfolderBase]: 2315/3875 cut-off events. [2024-06-27 21:37:39,233 INFO L125 PetriNetUnfolderBase]: For 195032/195034 co-relation queries the response was YES. [2024-06-27 21:37:39,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27617 conditions, 3875 events. 2315/3875 cut-off events. For 195032/195034 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 23974 event pairs, 516 based on Foata normal form. 2/3874 useless extension candidates. Maximal degree in co-relation 27513. Up to 3466 conditions per place. [2024-06-27 21:37:39,275 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 286 selfloop transitions, 34 changer transitions 0/327 dead transitions. [2024-06-27 21:37:39,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 327 transitions, 4239 flow [2024-06-27 21:37:39,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:39,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:39,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-27 21:37:39,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-27 21:37:39,276 INFO L175 Difference]: Start difference. First operand has 225 places, 301 transitions, 3453 flow. Second operand 8 states and 164 transitions. [2024-06-27 21:37:39,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 327 transitions, 4239 flow [2024-06-27 21:37:39,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 327 transitions, 4134 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 21:37:39,686 INFO L231 Difference]: Finished difference. Result has 227 places, 304 transitions, 3492 flow [2024-06-27 21:37:39,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3348, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3492, PETRI_PLACES=227, PETRI_TRANSITIONS=304} [2024-06-27 21:37:39,686 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 184 predicate places. [2024-06-27 21:37:39,686 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 304 transitions, 3492 flow [2024-06-27 21:37:39,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:39,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:39,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:39,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 21:37:39,687 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:39,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:39,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1398235240, now seen corresponding path program 4 times [2024-06-27 21:37:39,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:39,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235295523] [2024-06-27 21:37:39,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:39,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:39,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:40,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:40,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:40,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235295523] [2024-06-27 21:37:40,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235295523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:40,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:40,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:40,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793282812] [2024-06-27 21:37:40,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:40,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:40,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:40,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:40,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:40,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:37:40,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 304 transitions, 3492 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:40,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:40,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:37:40,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:41,129 INFO L124 PetriNetUnfolderBase]: 2325/3895 cut-off events. [2024-06-27 21:37:41,129 INFO L125 PetriNetUnfolderBase]: For 203357/203359 co-relation queries the response was YES. [2024-06-27 21:37:41,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28184 conditions, 3895 events. 2325/3895 cut-off events. For 203357/203359 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 24123 event pairs, 516 based on Foata normal form. 2/3894 useless extension candidates. Maximal degree in co-relation 28079. Up to 3460 conditions per place. [2024-06-27 21:37:41,172 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 278 selfloop transitions, 44 changer transitions 0/329 dead transitions. [2024-06-27 21:37:41,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 329 transitions, 4303 flow [2024-06-27 21:37:41,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:41,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:41,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-27 21:37:41,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-06-27 21:37:41,173 INFO L175 Difference]: Start difference. First operand has 227 places, 304 transitions, 3492 flow. Second operand 8 states and 163 transitions. [2024-06-27 21:37:41,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 329 transitions, 4303 flow [2024-06-27 21:37:41,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 329 transitions, 4179 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 21:37:41,568 INFO L231 Difference]: Finished difference. Result has 229 places, 307 transitions, 3539 flow [2024-06-27 21:37:41,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3368, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3539, PETRI_PLACES=229, PETRI_TRANSITIONS=307} [2024-06-27 21:37:41,568 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-27 21:37:41,568 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 307 transitions, 3539 flow [2024-06-27 21:37:41,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:41,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:41,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:41,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 21:37:41,569 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:41,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:41,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1225922980, now seen corresponding path program 5 times [2024-06-27 21:37:41,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:41,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110237242] [2024-06-27 21:37:41,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:41,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:41,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:42,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:42,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:42,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110237242] [2024-06-27 21:37:42,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110237242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:42,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:42,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:42,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952574091] [2024-06-27 21:37:42,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:42,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:42,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:42,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:42,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:42,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:37:42,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 307 transitions, 3539 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:42,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:42,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:37:42,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:43,283 INFO L124 PetriNetUnfolderBase]: 2335/3914 cut-off events. [2024-06-27 21:37:43,283 INFO L125 PetriNetUnfolderBase]: For 212009/212011 co-relation queries the response was YES. [2024-06-27 21:37:43,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28731 conditions, 3914 events. 2335/3914 cut-off events. For 212009/212011 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 24308 event pairs, 512 based on Foata normal form. 2/3914 useless extension candidates. Maximal degree in co-relation 28626. Up to 3538 conditions per place. [2024-06-27 21:37:43,326 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 285 selfloop transitions, 35 changer transitions 0/327 dead transitions. [2024-06-27 21:37:43,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 327 transitions, 4317 flow [2024-06-27 21:37:43,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:43,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:43,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 21:37:43,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 21:37:43,328 INFO L175 Difference]: Start difference. First operand has 229 places, 307 transitions, 3539 flow. Second operand 8 states and 156 transitions. [2024-06-27 21:37:43,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 327 transitions, 4317 flow [2024-06-27 21:37:43,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 327 transitions, 4170 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 21:37:43,640 INFO L231 Difference]: Finished difference. Result has 231 places, 310 transitions, 3551 flow [2024-06-27 21:37:43,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3392, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3551, PETRI_PLACES=231, PETRI_TRANSITIONS=310} [2024-06-27 21:37:43,640 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-27 21:37:43,641 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 310 transitions, 3551 flow [2024-06-27 21:37:43,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:43,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:43,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:43,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 21:37:43,641 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:43,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:43,641 INFO L85 PathProgramCache]: Analyzing trace with hash 713054104, now seen corresponding path program 6 times [2024-06-27 21:37:43,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:43,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214168662] [2024-06-27 21:37:43,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:43,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:43,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:44,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:44,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:44,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214168662] [2024-06-27 21:37:44,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214168662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:44,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:44,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:44,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248309838] [2024-06-27 21:37:44,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:44,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:44,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:44,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:44,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:44,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:37:44,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 310 transitions, 3551 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:44,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:44,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:37:44,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:45,104 INFO L124 PetriNetUnfolderBase]: 2361/3957 cut-off events. [2024-06-27 21:37:45,105 INFO L125 PetriNetUnfolderBase]: For 225212/225214 co-relation queries the response was YES. [2024-06-27 21:37:45,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29602 conditions, 3957 events. 2361/3957 cut-off events. For 225212/225214 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 24657 event pairs, 517 based on Foata normal form. 2/3956 useless extension candidates. Maximal degree in co-relation 29496. Up to 3441 conditions per place. [2024-06-27 21:37:45,147 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 257 selfloop transitions, 74 changer transitions 0/338 dead transitions. [2024-06-27 21:37:45,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 338 transitions, 4607 flow [2024-06-27 21:37:45,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:45,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:45,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-27 21:37:45,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-06-27 21:37:45,148 INFO L175 Difference]: Start difference. First operand has 231 places, 310 transitions, 3551 flow. Second operand 8 states and 163 transitions. [2024-06-27 21:37:45,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 338 transitions, 4607 flow [2024-06-27 21:37:45,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 338 transitions, 4440 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-27 21:37:45,575 INFO L231 Difference]: Finished difference. Result has 233 places, 316 transitions, 3709 flow [2024-06-27 21:37:45,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3384, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3709, PETRI_PLACES=233, PETRI_TRANSITIONS=316} [2024-06-27 21:37:45,576 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-27 21:37:45,576 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 316 transitions, 3709 flow [2024-06-27 21:37:45,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:45,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:45,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:45,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 21:37:45,577 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:45,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:45,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1693453320, now seen corresponding path program 1 times [2024-06-27 21:37:45,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:45,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447762141] [2024-06-27 21:37:45,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:45,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:45,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:46,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:46,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:46,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447762141] [2024-06-27 21:37:46,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447762141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:46,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:46,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:46,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973085728] [2024-06-27 21:37:46,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:46,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:46,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:46,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:46,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:46,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:37:46,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 316 transitions, 3709 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:46,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:46,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:37:46,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:47,038 INFO L124 PetriNetUnfolderBase]: 2369/3972 cut-off events. [2024-06-27 21:37:47,039 INFO L125 PetriNetUnfolderBase]: For 235617/235617 co-relation queries the response was YES. [2024-06-27 21:37:47,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30171 conditions, 3972 events. 2369/3972 cut-off events. For 235617/235617 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 24665 event pairs, 411 based on Foata normal form. 2/3972 useless extension candidates. Maximal degree in co-relation 30065. Up to 3568 conditions per place. [2024-06-27 21:37:47,081 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 319 selfloop transitions, 20 changer transitions 0/346 dead transitions. [2024-06-27 21:37:47,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 346 transitions, 4521 flow [2024-06-27 21:37:47,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:47,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:47,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-27 21:37:47,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-27 21:37:47,083 INFO L175 Difference]: Start difference. First operand has 233 places, 316 transitions, 3709 flow. Second operand 8 states and 162 transitions. [2024-06-27 21:37:47,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 346 transitions, 4521 flow [2024-06-27 21:37:47,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 346 transitions, 4389 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-27 21:37:47,421 INFO L231 Difference]: Finished difference. Result has 237 places, 318 transitions, 3674 flow [2024-06-27 21:37:47,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3577, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3674, PETRI_PLACES=237, PETRI_TRANSITIONS=318} [2024-06-27 21:37:47,422 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-27 21:37:47,422 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 318 transitions, 3674 flow [2024-06-27 21:37:47,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:47,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:47,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:47,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 21:37:47,423 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:47,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:47,423 INFO L85 PathProgramCache]: Analyzing trace with hash 337391578, now seen corresponding path program 2 times [2024-06-27 21:37:47,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:47,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841900997] [2024-06-27 21:37:47,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:47,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:47,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:48,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:48,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:48,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841900997] [2024-06-27 21:37:48,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841900997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:48,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:48,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:48,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983397562] [2024-06-27 21:37:48,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:48,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:48,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:48,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:48,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:48,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:37:48,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 318 transitions, 3674 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:48,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:48,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:37:48,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:49,045 INFO L124 PetriNetUnfolderBase]: 2377/3984 cut-off events. [2024-06-27 21:37:49,045 INFO L125 PetriNetUnfolderBase]: For 240948/240948 co-relation queries the response was YES. [2024-06-27 21:37:49,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30415 conditions, 3984 events. 2377/3984 cut-off events. For 240948/240948 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 24750 event pairs, 505 based on Foata normal form. 2/3984 useless extension candidates. Maximal degree in co-relation 30307. Up to 3610 conditions per place. [2024-06-27 21:37:49,085 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 313 selfloop transitions, 24 changer transitions 0/344 dead transitions. [2024-06-27 21:37:49,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 344 transitions, 4474 flow [2024-06-27 21:37:49,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:49,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:49,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 21:37:49,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2024-06-27 21:37:49,086 INFO L175 Difference]: Start difference. First operand has 237 places, 318 transitions, 3674 flow. Second operand 8 states and 159 transitions. [2024-06-27 21:37:49,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 344 transitions, 4474 flow [2024-06-27 21:37:49,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 344 transitions, 4393 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 21:37:49,477 INFO L231 Difference]: Finished difference. Result has 239 places, 320 transitions, 3703 flow [2024-06-27 21:37:49,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3593, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3703, PETRI_PLACES=239, PETRI_TRANSITIONS=320} [2024-06-27 21:37:49,477 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-27 21:37:49,477 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 320 transitions, 3703 flow [2024-06-27 21:37:49,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:49,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:49,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:49,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 21:37:49,478 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:49,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:49,478 INFO L85 PathProgramCache]: Analyzing trace with hash 778274522, now seen corresponding path program 3 times [2024-06-27 21:37:49,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:49,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525836822] [2024-06-27 21:37:49,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:49,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:49,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:50,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:50,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:50,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525836822] [2024-06-27 21:37:50,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525836822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:50,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:50,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:50,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702947948] [2024-06-27 21:37:50,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:50,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:50,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:50,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:50,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:50,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:37:50,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 320 transitions, 3703 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:50,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:50,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:37:50,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:51,071 INFO L124 PetriNetUnfolderBase]: 2385/3992 cut-off events. [2024-06-27 21:37:51,072 INFO L125 PetriNetUnfolderBase]: For 248588/248590 co-relation queries the response was YES. [2024-06-27 21:37:51,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30651 conditions, 3992 events. 2385/3992 cut-off events. For 248588/248590 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 24824 event pairs, 511 based on Foata normal form. 2/3992 useless extension candidates. Maximal degree in co-relation 30542. Up to 3610 conditions per place. [2024-06-27 21:37:51,119 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 298 selfloop transitions, 34 changer transitions 0/339 dead transitions. [2024-06-27 21:37:51,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 339 transitions, 4471 flow [2024-06-27 21:37:51,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:51,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:51,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 21:37:51,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-27 21:37:51,120 INFO L175 Difference]: Start difference. First operand has 239 places, 320 transitions, 3703 flow. Second operand 8 states and 155 transitions. [2024-06-27 21:37:51,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 339 transitions, 4471 flow [2024-06-27 21:37:51,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 339 transitions, 4375 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 21:37:51,578 INFO L231 Difference]: Finished difference. Result has 241 places, 322 transitions, 3741 flow [2024-06-27 21:37:51,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3607, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3741, PETRI_PLACES=241, PETRI_TRANSITIONS=322} [2024-06-27 21:37:51,579 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-27 21:37:51,579 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 322 transitions, 3741 flow [2024-06-27 21:37:51,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:51,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:51,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:51,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 21:37:51,580 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:51,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:51,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1402989896, now seen corresponding path program 1 times [2024-06-27 21:37:51,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:51,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51156018] [2024-06-27 21:37:51,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:51,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:51,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:52,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:52,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:52,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51156018] [2024-06-27 21:37:52,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51156018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:52,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:52,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:52,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637384390] [2024-06-27 21:37:52,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:52,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:52,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:52,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:52,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:52,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:37:52,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 322 transitions, 3741 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:52,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:52,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:37:52,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:53,297 INFO L124 PetriNetUnfolderBase]: 2390/3997 cut-off events. [2024-06-27 21:37:53,297 INFO L125 PetriNetUnfolderBase]: For 252593/252593 co-relation queries the response was YES. [2024-06-27 21:37:53,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30819 conditions, 3997 events. 2390/3997 cut-off events. For 252593/252593 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 24815 event pairs, 512 based on Foata normal form. 1/3994 useless extension candidates. Maximal degree in co-relation 30709. Up to 3598 conditions per place. [2024-06-27 21:37:53,343 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 311 selfloop transitions, 31 changer transitions 0/349 dead transitions. [2024-06-27 21:37:53,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 349 transitions, 4547 flow [2024-06-27 21:37:53,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:53,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:53,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-27 21:37:53,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-06-27 21:37:53,345 INFO L175 Difference]: Start difference. First operand has 241 places, 322 transitions, 3741 flow. Second operand 8 states and 163 transitions. [2024-06-27 21:37:53,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 349 transitions, 4547 flow [2024-06-27 21:37:53,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 349 transitions, 4431 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 21:37:53,836 INFO L231 Difference]: Finished difference. Result has 243 places, 325 transitions, 3745 flow [2024-06-27 21:37:53,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3625, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3745, PETRI_PLACES=243, PETRI_TRANSITIONS=325} [2024-06-27 21:37:53,836 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-27 21:37:53,837 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 325 transitions, 3745 flow [2024-06-27 21:37:53,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:53,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:53,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:53,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 21:37:53,837 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:53,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:53,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1110598274, now seen corresponding path program 7 times [2024-06-27 21:37:53,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:53,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902934384] [2024-06-27 21:37:53,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:53,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:53,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:54,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:54,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:54,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902934384] [2024-06-27 21:37:54,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902934384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:54,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:54,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:54,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917749738] [2024-06-27 21:37:54,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:54,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:54,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:54,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:54,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:54,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:37:54,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 325 transitions, 3745 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:54,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:54,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:37:54,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:55,260 INFO L124 PetriNetUnfolderBase]: 2400/4011 cut-off events. [2024-06-27 21:37:55,260 INFO L125 PetriNetUnfolderBase]: For 261276/261276 co-relation queries the response was YES. [2024-06-27 21:37:55,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31023 conditions, 4011 events. 2400/4011 cut-off events. For 261276/261276 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 24997 event pairs, 519 based on Foata normal form. 2/4003 useless extension candidates. Maximal degree in co-relation 30912. Up to 3587 conditions per place. [2024-06-27 21:37:55,306 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 308 selfloop transitions, 34 changer transitions 0/349 dead transitions. [2024-06-27 21:37:55,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 349 transitions, 4583 flow [2024-06-27 21:37:55,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:55,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:55,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 21:37:55,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-27 21:37:55,307 INFO L175 Difference]: Start difference. First operand has 243 places, 325 transitions, 3745 flow. Second operand 8 states and 161 transitions. [2024-06-27 21:37:55,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 349 transitions, 4583 flow [2024-06-27 21:37:55,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 349 transitions, 4495 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 21:37:55,781 INFO L231 Difference]: Finished difference. Result has 245 places, 328 transitions, 3815 flow [2024-06-27 21:37:55,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3657, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3815, PETRI_PLACES=245, PETRI_TRANSITIONS=328} [2024-06-27 21:37:55,781 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-27 21:37:55,782 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 328 transitions, 3815 flow [2024-06-27 21:37:55,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:55,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:55,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:55,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 21:37:55,782 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:55,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:55,783 INFO L85 PathProgramCache]: Analyzing trace with hash -25091234, now seen corresponding path program 8 times [2024-06-27 21:37:55,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:55,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063858883] [2024-06-27 21:37:55,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:55,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:55,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:56,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:56,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:56,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063858883] [2024-06-27 21:37:56,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063858883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:56,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:56,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:56,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690541363] [2024-06-27 21:37:56,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:56,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:56,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:56,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:56,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:56,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:37:56,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 328 transitions, 3815 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:56,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:56,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:37:56,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:57,389 INFO L124 PetriNetUnfolderBase]: 2394/4003 cut-off events. [2024-06-27 21:37:57,389 INFO L125 PetriNetUnfolderBase]: For 263971/263971 co-relation queries the response was YES. [2024-06-27 21:37:57,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30917 conditions, 4003 events. 2394/4003 cut-off events. For 263971/263971 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 24935 event pairs, 519 based on Foata normal form. 2/3995 useless extension candidates. Maximal degree in co-relation 30805. Up to 3565 conditions per place. [2024-06-27 21:37:57,431 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 300 selfloop transitions, 41 changer transitions 0/348 dead transitions. [2024-06-27 21:37:57,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 348 transitions, 4588 flow [2024-06-27 21:37:57,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:57,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:57,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 21:37:57,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-27 21:37:57,432 INFO L175 Difference]: Start difference. First operand has 245 places, 328 transitions, 3815 flow. Second operand 8 states and 161 transitions. [2024-06-27 21:37:57,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 348 transitions, 4588 flow [2024-06-27 21:37:57,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 348 transitions, 4361 flow, removed 55 selfloop flow, removed 9 redundant places. [2024-06-27 21:37:57,997 INFO L231 Difference]: Finished difference. Result has 244 places, 328 transitions, 3677 flow [2024-06-27 21:37:57,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3588, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3677, PETRI_PLACES=244, PETRI_TRANSITIONS=328} [2024-06-27 21:37:57,998 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-27 21:37:57,998 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 328 transitions, 3677 flow [2024-06-27 21:37:57,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:57,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:57,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:57,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 21:37:57,999 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:57,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:57,999 INFO L85 PathProgramCache]: Analyzing trace with hash 253872024, now seen corresponding path program 9 times [2024-06-27 21:37:57,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:57,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250999966] [2024-06-27 21:37:57,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:57,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:58,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:58,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:58,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:58,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250999966] [2024-06-27 21:37:58,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250999966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:58,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:58,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:58,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458857482] [2024-06-27 21:37:58,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:58,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:58,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:58,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:58,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:58,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:37:58,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 328 transitions, 3677 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:58,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:58,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:37:58,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:59,507 INFO L124 PetriNetUnfolderBase]: 2430/4063 cut-off events. [2024-06-27 21:37:59,507 INFO L125 PetriNetUnfolderBase]: For 279553/279553 co-relation queries the response was YES. [2024-06-27 21:37:59,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31460 conditions, 4063 events. 2430/4063 cut-off events. For 279553/279553 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 25409 event pairs, 519 based on Foata normal form. 4/4057 useless extension candidates. Maximal degree in co-relation 31348. Up to 3492 conditions per place. [2024-06-27 21:37:59,555 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 284 selfloop transitions, 62 changer transitions 0/353 dead transitions. [2024-06-27 21:37:59,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 353 transitions, 4754 flow [2024-06-27 21:37:59,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:59,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:59,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-27 21:37:59,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-06-27 21:37:59,556 INFO L175 Difference]: Start difference. First operand has 244 places, 328 transitions, 3677 flow. Second operand 8 states and 163 transitions. [2024-06-27 21:37:59,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 353 transitions, 4754 flow [2024-06-27 21:38:00,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 353 transitions, 4527 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-27 21:38:00,109 INFO L231 Difference]: Finished difference. Result has 243 places, 335 transitions, 3770 flow [2024-06-27 21:38:00,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3460, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3770, PETRI_PLACES=243, PETRI_TRANSITIONS=335} [2024-06-27 21:38:00,110 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-27 21:38:00,110 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 335 transitions, 3770 flow [2024-06-27 21:38:00,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:00,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:00,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:00,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 21:38:00,110 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:00,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:00,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1741029860, now seen corresponding path program 10 times [2024-06-27 21:38:00,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:00,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288749769] [2024-06-27 21:38:00,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:00,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:00,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:00,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:00,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:00,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288749769] [2024-06-27 21:38:00,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288749769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:00,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:00,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:00,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206075486] [2024-06-27 21:38:00,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:00,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:00,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:00,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:00,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:00,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:38:00,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 335 transitions, 3770 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:00,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:00,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:38:00,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:01,590 INFO L124 PetriNetUnfolderBase]: 2466/4110 cut-off events. [2024-06-27 21:38:01,591 INFO L125 PetriNetUnfolderBase]: For 296763/296763 co-relation queries the response was YES. [2024-06-27 21:38:01,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32323 conditions, 4110 events. 2466/4110 cut-off events. For 296763/296763 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 25790 event pairs, 546 based on Foata normal form. 4/4101 useless extension candidates. Maximal degree in co-relation 32212. Up to 3306 conditions per place. [2024-06-27 21:38:01,657 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 247 selfloop transitions, 106 changer transitions 0/360 dead transitions. [2024-06-27 21:38:01,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 360 transitions, 5040 flow [2024-06-27 21:38:01,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:38:01,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:38:01,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-27 21:38:01,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49107142857142855 [2024-06-27 21:38:01,659 INFO L175 Difference]: Start difference. First operand has 243 places, 335 transitions, 3770 flow. Second operand 8 states and 165 transitions. [2024-06-27 21:38:01,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 360 transitions, 5040 flow [2024-06-27 21:38:02,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 360 transitions, 4887 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-27 21:38:02,259 INFO L231 Difference]: Finished difference. Result has 247 places, 342 transitions, 4029 flow [2024-06-27 21:38:02,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3617, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4029, PETRI_PLACES=247, PETRI_TRANSITIONS=342} [2024-06-27 21:38:02,259 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-27 21:38:02,259 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 342 transitions, 4029 flow [2024-06-27 21:38:02,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:02,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:02,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:02,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 21:38:02,260 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:02,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:02,260 INFO L85 PathProgramCache]: Analyzing trace with hash 101057826, now seen corresponding path program 11 times [2024-06-27 21:38:02,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:02,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841227359] [2024-06-27 21:38:02,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:02,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:02,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:02,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:02,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:02,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841227359] [2024-06-27 21:38:02,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841227359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:02,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:02,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:02,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733262007] [2024-06-27 21:38:02,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:02,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:02,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:02,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:02,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:03,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:38:03,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 342 transitions, 4029 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:03,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:03,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:38:03,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:03,829 INFO L124 PetriNetUnfolderBase]: 2502/4172 cut-off events. [2024-06-27 21:38:03,829 INFO L125 PetriNetUnfolderBase]: For 314624/314624 co-relation queries the response was YES. [2024-06-27 21:38:03,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33660 conditions, 4172 events. 2502/4172 cut-off events. For 314624/314624 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 26281 event pairs, 546 based on Foata normal form. 4/4163 useless extension candidates. Maximal degree in co-relation 33547. Up to 3337 conditions per place. [2024-06-27 21:38:03,877 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 246 selfloop transitions, 117 changer transitions 0/370 dead transitions. [2024-06-27 21:38:03,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 370 transitions, 5364 flow [2024-06-27 21:38:03,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:38:03,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:38:03,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-27 21:38:03,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49404761904761907 [2024-06-27 21:38:03,879 INFO L175 Difference]: Start difference. First operand has 247 places, 342 transitions, 4029 flow. Second operand 8 states and 166 transitions. [2024-06-27 21:38:03,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 370 transitions, 5364 flow [2024-06-27 21:38:04,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 370 transitions, 5060 flow, removed 84 selfloop flow, removed 5 redundant places. [2024-06-27 21:38:04,555 INFO L231 Difference]: Finished difference. Result has 250 places, 350 transitions, 4205 flow [2024-06-27 21:38:04,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3765, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4205, PETRI_PLACES=250, PETRI_TRANSITIONS=350} [2024-06-27 21:38:04,555 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-27 21:38:04,555 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 350 transitions, 4205 flow [2024-06-27 21:38:04,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:04,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:04,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:04,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 21:38:04,556 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:04,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:04,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1743372454, now seen corresponding path program 12 times [2024-06-27 21:38:04,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:04,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656177080] [2024-06-27 21:38:04,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:04,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:04,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:05,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:05,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:05,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656177080] [2024-06-27 21:38:05,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656177080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:05,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:05,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:05,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676853029] [2024-06-27 21:38:05,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:05,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:05,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:05,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:05,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:05,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:38:05,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 350 transitions, 4205 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:05,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:05,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:38:05,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:06,227 INFO L124 PetriNetUnfolderBase]: 2490/4173 cut-off events. [2024-06-27 21:38:06,227 INFO L125 PetriNetUnfolderBase]: For 306323/306323 co-relation queries the response was YES. [2024-06-27 21:38:06,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32817 conditions, 4173 events. 2490/4173 cut-off events. For 306323/306323 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 26332 event pairs, 526 based on Foata normal form. 4/4167 useless extension candidates. Maximal degree in co-relation 32703. Up to 3715 conditions per place. [2024-06-27 21:38:06,272 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 311 selfloop transitions, 44 changer transitions 0/362 dead transitions. [2024-06-27 21:38:06,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 362 transitions, 4957 flow [2024-06-27 21:38:06,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:38:06,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:38:06,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 21:38:06,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 21:38:06,273 INFO L175 Difference]: Start difference. First operand has 250 places, 350 transitions, 4205 flow. Second operand 8 states and 156 transitions. [2024-06-27 21:38:06,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 362 transitions, 4957 flow [2024-06-27 21:38:06,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 362 transitions, 4702 flow, removed 82 selfloop flow, removed 4 redundant places. [2024-06-27 21:38:06,834 INFO L231 Difference]: Finished difference. Result has 254 places, 350 transitions, 4045 flow [2024-06-27 21:38:06,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3950, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4045, PETRI_PLACES=254, PETRI_TRANSITIONS=350} [2024-06-27 21:38:06,835 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-27 21:38:06,835 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 350 transitions, 4045 flow [2024-06-27 21:38:06,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:06,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:06,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:06,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 21:38:06,836 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:06,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:06,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1743375430, now seen corresponding path program 4 times [2024-06-27 21:38:06,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:06,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176634877] [2024-06-27 21:38:06,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:06,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:06,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:07,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:07,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:07,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176634877] [2024-06-27 21:38:07,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176634877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:07,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:07,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:07,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815488077] [2024-06-27 21:38:07,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:07,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:07,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:07,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:07,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:07,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:38:07,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 350 transitions, 4045 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:07,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:07,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:38:07,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:08,343 INFO L124 PetriNetUnfolderBase]: 2493/4182 cut-off events. [2024-06-27 21:38:08,343 INFO L125 PetriNetUnfolderBase]: For 304559/304559 co-relation queries the response was YES. [2024-06-27 21:38:08,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32374 conditions, 4182 events. 2493/4182 cut-off events. For 304559/304559 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 26439 event pairs, 523 based on Foata normal form. 4/4176 useless extension candidates. Maximal degree in co-relation 32259. Up to 3720 conditions per place. [2024-06-27 21:38:08,392 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 315 selfloop transitions, 43 changer transitions 0/365 dead transitions. [2024-06-27 21:38:08,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 365 transitions, 4865 flow [2024-06-27 21:38:08,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:38:08,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:38:08,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 21:38:08,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-27 21:38:08,393 INFO L175 Difference]: Start difference. First operand has 254 places, 350 transitions, 4045 flow. Second operand 8 states and 155 transitions. [2024-06-27 21:38:08,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 365 transitions, 4865 flow [2024-06-27 21:38:08,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 365 transitions, 4632 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-27 21:38:08,963 INFO L231 Difference]: Finished difference. Result has 253 places, 353 transitions, 3982 flow [2024-06-27 21:38:08,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3812, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3982, PETRI_PLACES=253, PETRI_TRANSITIONS=353} [2024-06-27 21:38:08,964 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 210 predicate places. [2024-06-27 21:38:08,964 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 353 transitions, 3982 flow [2024-06-27 21:38:08,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:08,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:08,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:08,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 21:38:08,964 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:08,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:08,965 INFO L85 PathProgramCache]: Analyzing trace with hash -316912806, now seen corresponding path program 2 times [2024-06-27 21:38:08,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:08,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083631078] [2024-06-27 21:38:08,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:08,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:08,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:09,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:09,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:09,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083631078] [2024-06-27 21:38:09,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083631078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:09,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:09,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:09,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385021661] [2024-06-27 21:38:09,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:09,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:09,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:09,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:09,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:09,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:38:09,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 353 transitions, 3982 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:09,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:09,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:38:09,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:10,631 INFO L124 PetriNetUnfolderBase]: 2498/4192 cut-off events. [2024-06-27 21:38:10,631 INFO L125 PetriNetUnfolderBase]: For 302601/302601 co-relation queries the response was YES. [2024-06-27 21:38:10,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32441 conditions, 4192 events. 2498/4192 cut-off events. For 302601/302601 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 26426 event pairs, 514 based on Foata normal form. 1/4187 useless extension candidates. Maximal degree in co-relation 32327. Up to 3750 conditions per place. [2024-06-27 21:38:10,679 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 340 selfloop transitions, 31 changer transitions 0/378 dead transitions. [2024-06-27 21:38:10,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 378 transitions, 4846 flow [2024-06-27 21:38:10,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:38:10,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:38:10,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 21:38:10,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 21:38:10,680 INFO L175 Difference]: Start difference. First operand has 253 places, 353 transitions, 3982 flow. Second operand 8 states and 160 transitions. [2024-06-27 21:38:10,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 378 transitions, 4846 flow [2024-06-27 21:38:11,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 378 transitions, 4698 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 21:38:11,531 INFO L231 Difference]: Finished difference. Result has 255 places, 356 transitions, 3960 flow [2024-06-27 21:38:11,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3834, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3960, PETRI_PLACES=255, PETRI_TRANSITIONS=356} [2024-06-27 21:38:11,531 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-27 21:38:11,531 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 356 transitions, 3960 flow [2024-06-27 21:38:11,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:11,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:11,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:11,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 21:38:11,532 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:11,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:11,532 INFO L85 PathProgramCache]: Analyzing trace with hash -31812936, now seen corresponding path program 3 times [2024-06-27 21:38:11,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:11,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570487886] [2024-06-27 21:38:11,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:11,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:11,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:12,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:12,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:12,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570487886] [2024-06-27 21:38:12,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570487886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:12,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:12,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:12,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323853444] [2024-06-27 21:38:12,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:12,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:12,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:12,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:12,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:12,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:38:12,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 356 transitions, 3960 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:12,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:12,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:38:12,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:13,225 INFO L124 PetriNetUnfolderBase]: 2503/4201 cut-off events. [2024-06-27 21:38:13,226 INFO L125 PetriNetUnfolderBase]: For 308706/308706 co-relation queries the response was YES. [2024-06-27 21:38:13,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32446 conditions, 4201 events. 2503/4201 cut-off events. For 308706/308706 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 26570 event pairs, 514 based on Foata normal form. 1/4196 useless extension candidates. Maximal degree in co-relation 32331. Up to 3757 conditions per place. [2024-06-27 21:38:13,275 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 342 selfloop transitions, 32 changer transitions 0/381 dead transitions. [2024-06-27 21:38:13,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 381 transitions, 4836 flow [2024-06-27 21:38:13,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:38:13,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:38:13,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 21:38:13,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2024-06-27 21:38:13,276 INFO L175 Difference]: Start difference. First operand has 255 places, 356 transitions, 3960 flow. Second operand 8 states and 159 transitions. [2024-06-27 21:38:13,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 381 transitions, 4836 flow [2024-06-27 21:38:13,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 381 transitions, 4742 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 21:38:13,856 INFO L231 Difference]: Finished difference. Result has 257 places, 359 transitions, 4000 flow [2024-06-27 21:38:13,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3866, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4000, PETRI_PLACES=257, PETRI_TRANSITIONS=359} [2024-06-27 21:38:13,857 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 214 predicate places. [2024-06-27 21:38:13,857 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 359 transitions, 4000 flow [2024-06-27 21:38:13,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:13,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:13,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:13,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 21:38:13,857 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:13,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:13,857 INFO L85 PathProgramCache]: Analyzing trace with hash -18480456, now seen corresponding path program 4 times [2024-06-27 21:38:13,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:13,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89862286] [2024-06-27 21:38:13,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:13,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:13,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:14,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:14,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:14,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89862286] [2024-06-27 21:38:14,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89862286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:14,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:14,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:14,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234611484] [2024-06-27 21:38:14,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:14,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:14,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:14,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:14,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:14,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:38:14,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 359 transitions, 4000 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:14,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:14,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:38:14,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:15,592 INFO L124 PetriNetUnfolderBase]: 2495/4190 cut-off events. [2024-06-27 21:38:15,592 INFO L125 PetriNetUnfolderBase]: For 313247/313247 co-relation queries the response was YES. [2024-06-27 21:38:15,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32315 conditions, 4190 events. 2495/4190 cut-off events. For 313247/313247 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 26458 event pairs, 514 based on Foata normal form. 2/4186 useless extension candidates. Maximal degree in co-relation 32199. Up to 3719 conditions per place. [2024-06-27 21:38:15,641 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 327 selfloop transitions, 44 changer transitions 0/378 dead transitions. [2024-06-27 21:38:15,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 378 transitions, 4802 flow [2024-06-27 21:38:15,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:38:15,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:38:15,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 21:38:15,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2024-06-27 21:38:15,642 INFO L175 Difference]: Start difference. First operand has 257 places, 359 transitions, 4000 flow. Second operand 8 states and 159 transitions. [2024-06-27 21:38:15,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 378 transitions, 4802 flow [2024-06-27 21:38:16,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 378 transitions, 4674 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 21:38:16,347 INFO L231 Difference]: Finished difference. Result has 259 places, 359 transitions, 3968 flow [2024-06-27 21:38:16,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3872, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3968, PETRI_PLACES=259, PETRI_TRANSITIONS=359} [2024-06-27 21:38:16,348 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-27 21:38:16,348 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 359 transitions, 3968 flow [2024-06-27 21:38:16,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:16,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:16,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:16,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 21:38:16,349 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:16,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:16,349 INFO L85 PathProgramCache]: Analyzing trace with hash 2023945850, now seen corresponding path program 1 times [2024-06-27 21:38:16,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:16,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313546584] [2024-06-27 21:38:16,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:16,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:16,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:17,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:17,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:17,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313546584] [2024-06-27 21:38:17,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313546584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:17,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:17,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:17,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073754128] [2024-06-27 21:38:17,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:17,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:17,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:17,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:17,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:17,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:38:17,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 359 transitions, 3968 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:17,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:17,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:38:17,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:17,948 INFO L124 PetriNetUnfolderBase]: 2508/4210 cut-off events. [2024-06-27 21:38:17,948 INFO L125 PetriNetUnfolderBase]: For 320500/320500 co-relation queries the response was YES. [2024-06-27 21:38:17,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32604 conditions, 4210 events. 2508/4210 cut-off events. For 320500/320500 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 26639 event pairs, 512 based on Foata normal form. 1/4205 useless extension candidates. Maximal degree in co-relation 32487. Up to 3765 conditions per place. [2024-06-27 21:38:17,991 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 341 selfloop transitions, 35 changer transitions 0/383 dead transitions. [2024-06-27 21:38:17,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 383 transitions, 5036 flow [2024-06-27 21:38:17,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:38:17,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:38:17,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 21:38:17,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 21:38:17,992 INFO L175 Difference]: Start difference. First operand has 259 places, 359 transitions, 3968 flow. Second operand 8 states and 156 transitions. [2024-06-27 21:38:17,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 383 transitions, 5036 flow [2024-06-27 21:38:18,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 383 transitions, 4912 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 21:38:18,706 INFO L231 Difference]: Finished difference. Result has 260 places, 365 transitions, 4034 flow [2024-06-27 21:38:18,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3844, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4034, PETRI_PLACES=260, PETRI_TRANSITIONS=365} [2024-06-27 21:38:18,707 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-27 21:38:18,707 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 365 transitions, 4034 flow [2024-06-27 21:38:18,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:18,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:18,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:18,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 21:38:18,707 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:18,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:18,708 INFO L85 PathProgramCache]: Analyzing trace with hash 268618042, now seen corresponding path program 2 times [2024-06-27 21:38:18,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:18,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135070609] [2024-06-27 21:38:18,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:18,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:18,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:19,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:19,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:19,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135070609] [2024-06-27 21:38:19,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135070609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:19,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:19,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:19,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298479007] [2024-06-27 21:38:19,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:19,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:19,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:19,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:19,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:19,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:38:19,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 365 transitions, 4034 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:19,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:19,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:38:19,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:20,287 INFO L124 PetriNetUnfolderBase]: 2505/4202 cut-off events. [2024-06-27 21:38:20,287 INFO L125 PetriNetUnfolderBase]: For 326428/326428 co-relation queries the response was YES. [2024-06-27 21:38:20,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32812 conditions, 4202 events. 2505/4202 cut-off events. For 326428/326428 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 26610 event pairs, 510 based on Foata normal form. 1/4197 useless extension candidates. Maximal degree in co-relation 32694. Up to 3771 conditions per place. [2024-06-27 21:38:20,338 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 344 selfloop transitions, 32 changer transitions 0/383 dead transitions. [2024-06-27 21:38:20,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 383 transitions, 4853 flow [2024-06-27 21:38:20,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:38:20,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:38:20,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 21:38:20,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-27 21:38:20,339 INFO L175 Difference]: Start difference. First operand has 260 places, 365 transitions, 4034 flow. Second operand 8 states and 155 transitions. [2024-06-27 21:38:20,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 383 transitions, 4853 flow [2024-06-27 21:38:21,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 383 transitions, 4736 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-27 21:38:21,105 INFO L231 Difference]: Finished difference. Result has 265 places, 367 transitions, 4018 flow [2024-06-27 21:38:21,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3918, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4018, PETRI_PLACES=265, PETRI_TRANSITIONS=367} [2024-06-27 21:38:21,106 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 222 predicate places. [2024-06-27 21:38:21,106 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 367 transitions, 4018 flow [2024-06-27 21:38:21,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:21,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:21,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:21,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 21:38:21,107 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:21,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:21,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1633633752, now seen corresponding path program 3 times [2024-06-27 21:38:21,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:21,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997589429] [2024-06-27 21:38:21,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:21,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:21,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:21,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:21,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997589429] [2024-06-27 21:38:21,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997589429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:21,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:21,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:21,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354968690] [2024-06-27 21:38:21,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:21,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:21,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:21,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:21,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:22,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:38:22,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 367 transitions, 4018 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:22,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:22,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:38:22,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:22,801 INFO L124 PetriNetUnfolderBase]: 2518/4219 cut-off events. [2024-06-27 21:38:22,801 INFO L125 PetriNetUnfolderBase]: For 337183/337183 co-relation queries the response was YES. [2024-06-27 21:38:22,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33197 conditions, 4219 events. 2518/4219 cut-off events. For 337183/337183 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 26655 event pairs, 518 based on Foata normal form. 1/4212 useless extension candidates. Maximal degree in co-relation 33076. Up to 3668 conditions per place. [2024-06-27 21:38:22,852 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 312 selfloop transitions, 77 changer transitions 0/396 dead transitions. [2024-06-27 21:38:22,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 396 transitions, 5354 flow [2024-06-27 21:38:22,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:38:22,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:38:22,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 21:38:22,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-27 21:38:22,853 INFO L175 Difference]: Start difference. First operand has 265 places, 367 transitions, 4018 flow. Second operand 8 states and 157 transitions. [2024-06-27 21:38:22,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 396 transitions, 5354 flow [2024-06-27 21:38:23,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 396 transitions, 5291 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 21:38:23,749 INFO L231 Difference]: Finished difference. Result has 270 places, 379 transitions, 4371 flow [2024-06-27 21:38:23,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3955, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4371, PETRI_PLACES=270, PETRI_TRANSITIONS=379} [2024-06-27 21:38:23,750 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-27 21:38:23,750 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 379 transitions, 4371 flow [2024-06-27 21:38:23,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:23,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:23,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:23,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 21:38:23,750 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:23,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:23,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1363243692, now seen corresponding path program 4 times [2024-06-27 21:38:23,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:23,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925349391] [2024-06-27 21:38:23,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:23,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:23,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:24,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:24,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:24,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925349391] [2024-06-27 21:38:24,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925349391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:24,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:24,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:24,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529225988] [2024-06-27 21:38:24,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:24,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:24,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:24,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:24,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:24,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:38:24,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 379 transitions, 4371 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:24,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:24,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:38:24,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:25,394 INFO L124 PetriNetUnfolderBase]: 2531/4241 cut-off events. [2024-06-27 21:38:25,394 INFO L125 PetriNetUnfolderBase]: For 350597/350597 co-relation queries the response was YES. [2024-06-27 21:38:25,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34093 conditions, 4241 events. 2531/4241 cut-off events. For 350597/350597 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 26840 event pairs, 518 based on Foata normal form. 1/4234 useless extension candidates. Maximal degree in co-relation 33969. Up to 3683 conditions per place. [2024-06-27 21:38:25,447 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 314 selfloop transitions, 81 changer transitions 0/402 dead transitions. [2024-06-27 21:38:25,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 402 transitions, 5664 flow [2024-06-27 21:38:25,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:38:25,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:38:25,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 21:38:25,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-27 21:38:25,448 INFO L175 Difference]: Start difference. First operand has 270 places, 379 transitions, 4371 flow. Second operand 8 states and 157 transitions. [2024-06-27 21:38:25,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 402 transitions, 5664 flow [2024-06-27 21:38:26,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 402 transitions, 5501 flow, removed 58 selfloop flow, removed 3 redundant places. [2024-06-27 21:38:26,225 INFO L231 Difference]: Finished difference. Result has 276 places, 386 transitions, 4557 flow [2024-06-27 21:38:26,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4236, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4557, PETRI_PLACES=276, PETRI_TRANSITIONS=386} [2024-06-27 21:38:26,225 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-27 21:38:26,225 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 386 transitions, 4557 flow [2024-06-27 21:38:26,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:26,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:26,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:26,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 21:38:26,226 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:26,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:26,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1355200122, now seen corresponding path program 5 times [2024-06-27 21:38:26,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:26,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868977683] [2024-06-27 21:38:26,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:26,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:26,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:26,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:26,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:26,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868977683] [2024-06-27 21:38:26,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868977683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:26,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:26,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:26,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749360425] [2024-06-27 21:38:26,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:26,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:26,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:26,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:26,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:27,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:38:27,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 386 transitions, 4557 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:27,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:27,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:38:27,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:27,958 INFO L124 PetriNetUnfolderBase]: 2528/4235 cut-off events. [2024-06-27 21:38:27,958 INFO L125 PetriNetUnfolderBase]: For 352732/352732 co-relation queries the response was YES. [2024-06-27 21:38:27,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34004 conditions, 4235 events. 2528/4235 cut-off events. For 352732/352732 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 26810 event pairs, 518 based on Foata normal form. 1/4228 useless extension candidates. Maximal degree in co-relation 33877. Up to 3720 conditions per place. [2024-06-27 21:38:28,003 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 337 selfloop transitions, 59 changer transitions 0/403 dead transitions. [2024-06-27 21:38:28,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 403 transitions, 5615 flow [2024-06-27 21:38:28,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:38:28,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:38:28,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 21:38:28,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 21:38:28,004 INFO L175 Difference]: Start difference. First operand has 276 places, 386 transitions, 4557 flow. Second operand 8 states and 156 transitions. [2024-06-27 21:38:28,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 403 transitions, 5615 flow [2024-06-27 21:38:28,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 403 transitions, 5416 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-27 21:38:28,973 INFO L231 Difference]: Finished difference. Result has 281 places, 388 transitions, 4562 flow [2024-06-27 21:38:28,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4378, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4562, PETRI_PLACES=281, PETRI_TRANSITIONS=388} [2024-06-27 21:38:28,973 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-27 21:38:28,974 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 388 transitions, 4562 flow [2024-06-27 21:38:28,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:28,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:28,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:28,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 21:38:28,974 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:28,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:28,974 INFO L85 PathProgramCache]: Analyzing trace with hash 609069548, now seen corresponding path program 6 times [2024-06-27 21:38:28,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:28,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255063850] [2024-06-27 21:38:28,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:28,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:28,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:29,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:29,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:29,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255063850] [2024-06-27 21:38:29,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255063850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:29,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:29,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:29,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691150313] [2024-06-27 21:38:29,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:29,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:29,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:29,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:29,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:29,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:38:29,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 388 transitions, 4562 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:29,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:29,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:38:29,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:30,550 INFO L124 PetriNetUnfolderBase]: 2533/4242 cut-off events. [2024-06-27 21:38:30,550 INFO L125 PetriNetUnfolderBase]: For 360183/360183 co-relation queries the response was YES. [2024-06-27 21:38:30,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34123 conditions, 4242 events. 2533/4242 cut-off events. For 360183/360183 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 26854 event pairs, 518 based on Foata normal form. 1/4235 useless extension candidates. Maximal degree in co-relation 33994. Up to 3747 conditions per place. [2024-06-27 21:38:30,602 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 346 selfloop transitions, 53 changer transitions 0/406 dead transitions. [2024-06-27 21:38:30,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 406 transitions, 5491 flow [2024-06-27 21:38:30,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:38:30,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:38:30,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 21:38:30,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-27 21:38:30,603 INFO L175 Difference]: Start difference. First operand has 281 places, 388 transitions, 4562 flow. Second operand 8 states and 155 transitions. [2024-06-27 21:38:30,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 406 transitions, 5491 flow [2024-06-27 21:38:31,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 406 transitions, 5368 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 21:38:31,578 INFO L231 Difference]: Finished difference. Result has 285 places, 393 transitions, 4669 flow [2024-06-27 21:38:31,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4450, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4669, PETRI_PLACES=285, PETRI_TRANSITIONS=393} [2024-06-27 21:38:31,579 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-27 21:38:31,579 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 393 transitions, 4669 flow [2024-06-27 21:38:31,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:31,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:31,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:31,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 21:38:31,579 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:31,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:31,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1489647202, now seen corresponding path program 7 times [2024-06-27 21:38:31,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:31,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912927148] [2024-06-27 21:38:31,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:31,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:31,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:32,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:32,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:32,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912927148] [2024-06-27 21:38:32,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912927148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:32,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:32,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:32,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353744558] [2024-06-27 21:38:32,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:32,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:32,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:32,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:32,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:32,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:38:32,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 393 transitions, 4669 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:32,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:32,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:38:32,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:33,234 INFO L124 PetriNetUnfolderBase]: 2530/4240 cut-off events. [2024-06-27 21:38:33,234 INFO L125 PetriNetUnfolderBase]: For 364883/364883 co-relation queries the response was YES. [2024-06-27 21:38:33,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34128 conditions, 4240 events. 2530/4240 cut-off events. For 364883/364883 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 26846 event pairs, 518 based on Foata normal form. 1/4233 useless extension candidates. Maximal degree in co-relation 33997. Up to 3743 conditions per place. [2024-06-27 21:38:33,287 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 343 selfloop transitions, 57 changer transitions 0/407 dead transitions. [2024-06-27 21:38:33,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 407 transitions, 5519 flow [2024-06-27 21:38:33,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:38:33,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:38:33,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 21:38:33,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-27 21:38:33,289 INFO L175 Difference]: Start difference. First operand has 285 places, 393 transitions, 4669 flow. Second operand 8 states and 155 transitions. [2024-06-27 21:38:33,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 407 transitions, 5519 flow [2024-06-27 21:38:34,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 407 transitions, 5366 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-27 21:38:34,167 INFO L231 Difference]: Finished difference. Result has 289 places, 394 transitions, 4646 flow [2024-06-27 21:38:34,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4517, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4646, PETRI_PLACES=289, PETRI_TRANSITIONS=394} [2024-06-27 21:38:34,168 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-27 21:38:34,168 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 394 transitions, 4646 flow [2024-06-27 21:38:34,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:34,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:34,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:34,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 21:38:34,168 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:34,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:34,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1148338362, now seen corresponding path program 8 times [2024-06-27 21:38:34,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:34,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895759023] [2024-06-27 21:38:34,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:34,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:34,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:34,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:34,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:34,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895759023] [2024-06-27 21:38:34,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895759023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:34,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:34,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:34,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084842845] [2024-06-27 21:38:34,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:34,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:34,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:34,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:34,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:35,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:38:35,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 394 transitions, 4646 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:35,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:35,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:38:35,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:35,892 INFO L124 PetriNetUnfolderBase]: 2527/4234 cut-off events. [2024-06-27 21:38:35,892 INFO L125 PetriNetUnfolderBase]: For 369265/369265 co-relation queries the response was YES. [2024-06-27 21:38:35,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34072 conditions, 4234 events. 2527/4234 cut-off events. For 369265/369265 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 26811 event pairs, 518 based on Foata normal form. 1/4227 useless extension candidates. Maximal degree in co-relation 33940. Up to 3727 conditions per place. [2024-06-27 21:38:35,943 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 332 selfloop transitions, 68 changer transitions 0/407 dead transitions. [2024-06-27 21:38:35,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 407 transitions, 5486 flow [2024-06-27 21:38:35,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:38:35,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:38:35,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 21:38:35,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-27 21:38:35,944 INFO L175 Difference]: Start difference. First operand has 289 places, 394 transitions, 4646 flow. Second operand 8 states and 155 transitions. [2024-06-27 21:38:35,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 407 transitions, 5486 flow [2024-06-27 21:38:36,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 407 transitions, 5367 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-27 21:38:36,920 INFO L231 Difference]: Finished difference. Result has 293 places, 394 transitions, 4669 flow [2024-06-27 21:38:36,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4527, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4669, PETRI_PLACES=293, PETRI_TRANSITIONS=394} [2024-06-27 21:38:36,920 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-27 21:38:36,920 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 394 transitions, 4669 flow [2024-06-27 21:38:36,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:36,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:36,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:36,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 21:38:36,921 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:36,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:36,921 INFO L85 PathProgramCache]: Analyzing trace with hash 194662234, now seen corresponding path program 1 times [2024-06-27 21:38:36,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:36,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137826364] [2024-06-27 21:38:36,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:36,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:36,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:37,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:37,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:37,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137826364] [2024-06-27 21:38:37,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137826364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:37,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:37,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:37,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876165011] [2024-06-27 21:38:37,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:37,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:37,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:37,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:37,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:37,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:38:37,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 394 transitions, 4669 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:37,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:37,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:38:37,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:38,588 INFO L124 PetriNetUnfolderBase]: 2535/4252 cut-off events. [2024-06-27 21:38:38,588 INFO L125 PetriNetUnfolderBase]: For 382205/382207 co-relation queries the response was YES. [2024-06-27 21:38:38,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34359 conditions, 4252 events. 2535/4252 cut-off events. For 382205/382207 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 26938 event pairs, 474 based on Foata normal form. 2/4252 useless extension candidates. Maximal degree in co-relation 34226. Up to 3850 conditions per place. [2024-06-27 21:38:38,639 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 395 selfloop transitions, 17 changer transitions 0/419 dead transitions. [2024-06-27 21:38:38,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 419 transitions, 5645 flow [2024-06-27 21:38:38,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:38:38,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:38:38,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 21:38:38,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-27 21:38:38,640 INFO L175 Difference]: Start difference. First operand has 293 places, 394 transitions, 4669 flow. Second operand 9 states and 169 transitions. [2024-06-27 21:38:38,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 419 transitions, 5645 flow [2024-06-27 21:38:39,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 419 transitions, 5457 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 21:38:39,718 INFO L231 Difference]: Finished difference. Result has 296 places, 398 transitions, 4621 flow [2024-06-27 21:38:39,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4481, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4621, PETRI_PLACES=296, PETRI_TRANSITIONS=398} [2024-06-27 21:38:39,718 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-27 21:38:39,718 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 398 transitions, 4621 flow [2024-06-27 21:38:39,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:39,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:39,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:39,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 21:38:39,719 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:39,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:39,719 INFO L85 PathProgramCache]: Analyzing trace with hash -18469544, now seen corresponding path program 2 times [2024-06-27 21:38:39,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:39,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133481541] [2024-06-27 21:38:39,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:39,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:39,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:40,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:40,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:40,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133481541] [2024-06-27 21:38:40,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133481541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:40,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:40,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:40,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352660640] [2024-06-27 21:38:40,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:40,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:40,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:40,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:40,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:40,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:38:40,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 398 transitions, 4621 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:40,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:40,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:38:40,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:41,588 INFO L124 PetriNetUnfolderBase]: 2543/4266 cut-off events. [2024-06-27 21:38:41,588 INFO L125 PetriNetUnfolderBase]: For 391311/391313 co-relation queries the response was YES. [2024-06-27 21:38:41,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34571 conditions, 4266 events. 2543/4266 cut-off events. For 391311/391313 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 27039 event pairs, 508 based on Foata normal form. 2/4266 useless extension candidates. Maximal degree in co-relation 34436. Up to 3879 conditions per place. [2024-06-27 21:38:41,645 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 392 selfloop transitions, 18 changer transitions 0/417 dead transitions. [2024-06-27 21:38:41,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 417 transitions, 5573 flow [2024-06-27 21:38:41,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:38:41,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:38:41,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 21:38:41,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-27 21:38:41,646 INFO L175 Difference]: Start difference. First operand has 296 places, 398 transitions, 4621 flow. Second operand 9 states and 166 transitions. [2024-06-27 21:38:41,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 417 transitions, 5573 flow [2024-06-27 21:38:42,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 417 transitions, 5466 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-27 21:38:42,678 INFO L231 Difference]: Finished difference. Result has 299 places, 400 transitions, 4643 flow [2024-06-27 21:38:42,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4514, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4643, PETRI_PLACES=299, PETRI_TRANSITIONS=400} [2024-06-27 21:38:42,679 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-27 21:38:42,679 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 400 transitions, 4643 flow [2024-06-27 21:38:42,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:42,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:42,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:42,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 21:38:42,679 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:42,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:42,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1903549390, now seen corresponding path program 1 times [2024-06-27 21:38:42,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:42,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137301971] [2024-06-27 21:38:42,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:42,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:42,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:43,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:43,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:43,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137301971] [2024-06-27 21:38:43,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137301971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:43,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:43,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:38:43,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653438224] [2024-06-27 21:38:43,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:43,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:38:43,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:43,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:38:43,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:38:43,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:38:43,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 400 transitions, 4643 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:43,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:43,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:38:43,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:44,814 INFO L124 PetriNetUnfolderBase]: 2553/4285 cut-off events. [2024-06-27 21:38:44,814 INFO L125 PetriNetUnfolderBase]: For 401983/401983 co-relation queries the response was YES. [2024-06-27 21:38:44,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34807 conditions, 4285 events. 2553/4285 cut-off events. For 401983/401983 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 27172 event pairs, 502 based on Foata normal form. 2/4281 useless extension candidates. Maximal degree in co-relation 34671. Up to 3796 conditions per place. [2024-06-27 21:38:44,865 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 363 selfloop transitions, 54 changer transitions 0/424 dead transitions. [2024-06-27 21:38:44,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 424 transitions, 5675 flow [2024-06-27 21:38:44,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:38:44,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:38:44,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-27 21:38:44,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 21:38:44,867 INFO L175 Difference]: Start difference. First operand has 299 places, 400 transitions, 4643 flow. Second operand 10 states and 190 transitions. [2024-06-27 21:38:44,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 424 transitions, 5675 flow [2024-06-27 21:38:45,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 424 transitions, 5562 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-27 21:38:45,989 INFO L231 Difference]: Finished difference. Result has 303 places, 406 transitions, 4804 flow [2024-06-27 21:38:45,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4530, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4804, PETRI_PLACES=303, PETRI_TRANSITIONS=406} [2024-06-27 21:38:45,990 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-27 21:38:45,990 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 406 transitions, 4804 flow [2024-06-27 21:38:45,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:45,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:45,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:45,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 21:38:45,991 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:45,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:45,991 INFO L85 PathProgramCache]: Analyzing trace with hash 411594172, now seen corresponding path program 3 times [2024-06-27 21:38:45,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:45,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422412412] [2024-06-27 21:38:45,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:45,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:46,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:46,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:46,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:46,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422412412] [2024-06-27 21:38:46,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422412412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:46,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:46,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:46,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926920614] [2024-06-27 21:38:46,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:46,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:46,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:46,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:46,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:46,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:38:46,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 406 transitions, 4804 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:46,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:46,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:38:46,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:47,741 INFO L124 PetriNetUnfolderBase]: 2561/4299 cut-off events. [2024-06-27 21:38:47,741 INFO L125 PetriNetUnfolderBase]: For 412735/412735 co-relation queries the response was YES. [2024-06-27 21:38:47,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35424 conditions, 4299 events. 2561/4299 cut-off events. For 412735/412735 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 27330 event pairs, 505 based on Foata normal form. 2/4299 useless extension candidates. Maximal degree in co-relation 35286. Up to 3911 conditions per place. [2024-06-27 21:38:47,801 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 399 selfloop transitions, 17 changer transitions 0/423 dead transitions. [2024-06-27 21:38:47,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 423 transitions, 5776 flow [2024-06-27 21:38:47,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:38:47,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:38:47,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 21:38:47,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 21:38:47,803 INFO L175 Difference]: Start difference. First operand has 303 places, 406 transitions, 4804 flow. Second operand 8 states and 150 transitions. [2024-06-27 21:38:47,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 423 transitions, 5776 flow [2024-06-27 21:38:48,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 423 transitions, 5566 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-27 21:38:48,817 INFO L231 Difference]: Finished difference. Result has 306 places, 409 transitions, 4745 flow [2024-06-27 21:38:48,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4594, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4745, PETRI_PLACES=306, PETRI_TRANSITIONS=409} [2024-06-27 21:38:48,817 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-27 21:38:48,818 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 409 transitions, 4745 flow [2024-06-27 21:38:48,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:48,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:48,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:48,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 21:38:48,818 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:48,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:48,818 INFO L85 PathProgramCache]: Analyzing trace with hash -39281926, now seen corresponding path program 2 times [2024-06-27 21:38:48,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:48,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221854028] [2024-06-27 21:38:48,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:48,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:48,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:49,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:49,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:49,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221854028] [2024-06-27 21:38:49,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221854028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:49,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:49,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:38:49,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808477235] [2024-06-27 21:38:49,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:49,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:38:49,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:49,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:38:49,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:38:49,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:38:49,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 409 transitions, 4745 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:49,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:49,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:38:49,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:50,802 INFO L124 PetriNetUnfolderBase]: 2571/4315 cut-off events. [2024-06-27 21:38:50,802 INFO L125 PetriNetUnfolderBase]: For 422400/422400 co-relation queries the response was YES. [2024-06-27 21:38:50,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35557 conditions, 4315 events. 2571/4315 cut-off events. For 422400/422400 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 27463 event pairs, 502 based on Foata normal form. 2/4311 useless extension candidates. Maximal degree in co-relation 35416. Up to 3744 conditions per place. [2024-06-27 21:38:50,855 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 334 selfloop transitions, 88 changer transitions 0/429 dead transitions. [2024-06-27 21:38:50,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 429 transitions, 5944 flow [2024-06-27 21:38:50,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:38:50,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:38:50,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 21:38:50,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-27 21:38:50,856 INFO L175 Difference]: Start difference. First operand has 306 places, 409 transitions, 4745 flow. Second operand 9 states and 178 transitions. [2024-06-27 21:38:50,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 429 transitions, 5944 flow [2024-06-27 21:38:52,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 429 transitions, 5812 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-27 21:38:52,247 INFO L231 Difference]: Finished difference. Result has 309 places, 413 transitions, 4942 flow [2024-06-27 21:38:52,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4613, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4942, PETRI_PLACES=309, PETRI_TRANSITIONS=413} [2024-06-27 21:38:52,248 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-27 21:38:52,248 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 413 transitions, 4942 flow [2024-06-27 21:38:52,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:52,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:52,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:52,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 21:38:52,248 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:52,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:52,249 INFO L85 PathProgramCache]: Analyzing trace with hash -45948166, now seen corresponding path program 3 times [2024-06-27 21:38:52,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:52,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030138859] [2024-06-27 21:38:52,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:52,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:52,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:53,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:53,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:53,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030138859] [2024-06-27 21:38:53,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030138859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:53,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:53,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:38:53,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595076757] [2024-06-27 21:38:53,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:53,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:38:53,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:53,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:38:53,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:38:53,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:38:53,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 413 transitions, 4942 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:53,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:53,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:38:53,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:54,910 INFO L124 PetriNetUnfolderBase]: 2591/4345 cut-off events. [2024-06-27 21:38:54,910 INFO L125 PetriNetUnfolderBase]: For 432586/432586 co-relation queries the response was YES. [2024-06-27 21:38:54,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36303 conditions, 4345 events. 2591/4345 cut-off events. For 432586/432586 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 27642 event pairs, 502 based on Foata normal form. 2/4341 useless extension candidates. Maximal degree in co-relation 36162. Up to 3788 conditions per place. [2024-06-27 21:38:54,968 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 357 selfloop transitions, 72 changer transitions 0/436 dead transitions. [2024-06-27 21:38:54,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 436 transitions, 5997 flow [2024-06-27 21:38:54,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:38:54,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:38:54,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-27 21:38:54,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-27 21:38:54,969 INFO L175 Difference]: Start difference. First operand has 309 places, 413 transitions, 4942 flow. Second operand 9 states and 176 transitions. [2024-06-27 21:38:54,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 436 transitions, 5997 flow [2024-06-27 21:38:56,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 436 transitions, 5700 flow, removed 65 selfloop flow, removed 6 redundant places. [2024-06-27 21:38:56,126 INFO L231 Difference]: Finished difference. Result has 313 places, 421 transitions, 4968 flow [2024-06-27 21:38:56,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4656, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4968, PETRI_PLACES=313, PETRI_TRANSITIONS=421} [2024-06-27 21:38:56,127 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-27 21:38:56,127 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 421 transitions, 4968 flow [2024-06-27 21:38:56,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:56,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:56,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:56,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 21:38:56,127 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:56,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:56,128 INFO L85 PathProgramCache]: Analyzing trace with hash 268894810, now seen corresponding path program 4 times [2024-06-27 21:38:56,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:56,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704946703] [2024-06-27 21:38:56,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:56,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:56,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:57,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:57,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:57,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704946703] [2024-06-27 21:38:57,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704946703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:57,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:57,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:38:57,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161011031] [2024-06-27 21:38:57,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:57,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:38:57,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:57,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:38:57,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:38:57,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:38:57,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 421 transitions, 4968 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:57,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:57,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:38:57,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:58,216 INFO L124 PetriNetUnfolderBase]: 2585/4337 cut-off events. [2024-06-27 21:38:58,216 INFO L125 PetriNetUnfolderBase]: For 432211/432211 co-relation queries the response was YES. [2024-06-27 21:38:58,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35971 conditions, 4337 events. 2585/4337 cut-off events. For 432211/432211 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 27587 event pairs, 502 based on Foata normal form. 2/4333 useless extension candidates. Maximal degree in co-relation 35828. Up to 3846 conditions per place. [2024-06-27 21:38:58,273 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 375 selfloop transitions, 54 changer transitions 0/436 dead transitions. [2024-06-27 21:38:58,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 436 transitions, 5869 flow [2024-06-27 21:38:58,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:38:58,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:38:58,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 21:38:58,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-27 21:38:58,274 INFO L175 Difference]: Start difference. First operand has 313 places, 421 transitions, 4968 flow. Second operand 9 states and 175 transitions. [2024-06-27 21:38:58,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 436 transitions, 5869 flow [2024-06-27 21:38:59,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 436 transitions, 5599 flow, removed 72 selfloop flow, removed 6 redundant places. [2024-06-27 21:38:59,610 INFO L231 Difference]: Finished difference. Result has 316 places, 421 transitions, 4813 flow [2024-06-27 21:38:59,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4698, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4813, PETRI_PLACES=316, PETRI_TRANSITIONS=421} [2024-06-27 21:38:59,611 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-27 21:38:59,611 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 421 transitions, 4813 flow [2024-06-27 21:38:59,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:59,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:59,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:59,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 21:38:59,611 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:59,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:59,612 INFO L85 PathProgramCache]: Analyzing trace with hash 381267226, now seen corresponding path program 4 times [2024-06-27 21:38:59,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:59,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728606084] [2024-06-27 21:38:59,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:59,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:59,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:00,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:00,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:00,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728606084] [2024-06-27 21:39:00,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728606084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:00,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:00,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:39:00,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054942149] [2024-06-27 21:39:00,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:00,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:39:00,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:00,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:39:00,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:39:00,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:39:00,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 421 transitions, 4813 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:00,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:00,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:39:00,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:01,505 INFO L124 PetriNetUnfolderBase]: 2580/4329 cut-off events. [2024-06-27 21:39:01,505 INFO L125 PetriNetUnfolderBase]: For 435042/435042 co-relation queries the response was YES. [2024-06-27 21:39:01,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35546 conditions, 4329 events. 2580/4329 cut-off events. For 435042/435042 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 27637 event pairs, 508 based on Foata normal form. 2/4328 useless extension candidates. Maximal degree in co-relation 35403. Up to 3929 conditions per place. [2024-06-27 21:39:01,555 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 404 selfloop transitions, 24 changer transitions 0/435 dead transitions. [2024-06-27 21:39:01,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 435 transitions, 5803 flow [2024-06-27 21:39:01,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:39:01,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:39:01,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 21:39:01,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 21:39:01,556 INFO L175 Difference]: Start difference. First operand has 316 places, 421 transitions, 4813 flow. Second operand 8 states and 150 transitions. [2024-06-27 21:39:01,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 435 transitions, 5803 flow [2024-06-27 21:39:02,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 435 transitions, 5626 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-27 21:39:02,612 INFO L231 Difference]: Finished difference. Result has 315 places, 424 transitions, 4805 flow [2024-06-27 21:39:02,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4636, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4805, PETRI_PLACES=315, PETRI_TRANSITIONS=424} [2024-06-27 21:39:02,613 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-27 21:39:02,613 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 424 transitions, 4805 flow [2024-06-27 21:39:02,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:02,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:02,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:02,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 21:39:02,613 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:39:02,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:02,613 INFO L85 PathProgramCache]: Analyzing trace with hash 34619514, now seen corresponding path program 5 times [2024-06-27 21:39:02,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:02,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513631527] [2024-06-27 21:39:02,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:02,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:02,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:03,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:03,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:03,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513631527] [2024-06-27 21:39:03,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513631527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:03,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:03,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:39:03,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129069586] [2024-06-27 21:39:03,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:03,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:39:03,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:03,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:39:03,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:39:03,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:39:03,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 424 transitions, 4805 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:03,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:03,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:39:03,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:04,560 INFO L124 PetriNetUnfolderBase]: 2598/4350 cut-off events. [2024-06-27 21:39:04,560 INFO L125 PetriNetUnfolderBase]: For 449588/449588 co-relation queries the response was YES. [2024-06-27 21:39:04,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36010 conditions, 4350 events. 2598/4350 cut-off events. For 449588/449588 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 27692 event pairs, 529 based on Foata normal form. 2/4344 useless extension candidates. Maximal degree in co-relation 35867. Up to 3613 conditions per place. [2024-06-27 21:39:04,616 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 270 selfloop transitions, 168 changer transitions 0/445 dead transitions. [2024-06-27 21:39:04,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 445 transitions, 6192 flow [2024-06-27 21:39:04,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:39:04,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:39:04,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-27 21:39:04,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-27 21:39:04,618 INFO L175 Difference]: Start difference. First operand has 315 places, 424 transitions, 4805 flow. Second operand 9 states and 179 transitions. [2024-06-27 21:39:04,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 445 transitions, 6192 flow [2024-06-27 21:39:05,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 445 transitions, 6032 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-27 21:39:05,968 INFO L231 Difference]: Finished difference. Result has 318 places, 432 transitions, 5292 flow [2024-06-27 21:39:05,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4645, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5292, PETRI_PLACES=318, PETRI_TRANSITIONS=432} [2024-06-27 21:39:05,969 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-27 21:39:05,969 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 432 transitions, 5292 flow [2024-06-27 21:39:05,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:05,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:05,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:05,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 21:39:05,970 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:39:05,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:05,971 INFO L85 PathProgramCache]: Analyzing trace with hash 387938426, now seen corresponding path program 6 times [2024-06-27 21:39:05,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:05,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222222024] [2024-06-27 21:39:05,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:05,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:05,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:06,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:06,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:06,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222222024] [2024-06-27 21:39:06,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222222024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:06,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:06,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:39:06,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760377520] [2024-06-27 21:39:06,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:06,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:39:06,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:06,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:39:06,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:39:07,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:39:07,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 432 transitions, 5292 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:07,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:07,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:39:07,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:07,972 INFO L124 PetriNetUnfolderBase]: 2608/4370 cut-off events. [2024-06-27 21:39:07,972 INFO L125 PetriNetUnfolderBase]: For 464392/464392 co-relation queries the response was YES. [2024-06-27 21:39:08,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36878 conditions, 4370 events. 2608/4370 cut-off events. For 464392/464392 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 27944 event pairs, 531 based on Foata normal form. 2/4362 useless extension candidates. Maximal degree in co-relation 36735. Up to 3693 conditions per place. [2024-06-27 21:39:08,031 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 329 selfloop transitions, 112 changer transitions 0/448 dead transitions. [2024-06-27 21:39:08,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 448 transitions, 6363 flow [2024-06-27 21:39:08,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:39:08,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:39:08,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 21:39:08,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-27 21:39:08,032 INFO L175 Difference]: Start difference. First operand has 318 places, 432 transitions, 5292 flow. Second operand 9 states and 178 transitions. [2024-06-27 21:39:08,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 448 transitions, 6363 flow [2024-06-27 21:39:09,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 448 transitions, 6014 flow, removed 90 selfloop flow, removed 5 redundant places. [2024-06-27 21:39:09,328 INFO L231 Difference]: Finished difference. Result has 322 places, 436 transitions, 5338 flow [2024-06-27 21:39:09,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4963, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5338, PETRI_PLACES=322, PETRI_TRANSITIONS=436} [2024-06-27 21:39:09,328 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-27 21:39:09,328 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 436 transitions, 5338 flow [2024-06-27 21:39:09,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:09,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:09,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:09,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 21:39:09,329 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:39:09,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:09,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1355209050, now seen corresponding path program 7 times [2024-06-27 21:39:09,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:09,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106180052] [2024-06-27 21:39:09,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:09,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:09,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:10,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:10,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:10,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106180052] [2024-06-27 21:39:10,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106180052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:10,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:10,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:39:10,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069877058] [2024-06-27 21:39:10,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:10,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:39:10,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:10,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:39:10,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:39:10,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:39:10,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 436 transitions, 5338 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:10,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:10,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:39:10,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:11,415 INFO L124 PetriNetUnfolderBase]: 2602/4360 cut-off events. [2024-06-27 21:39:11,415 INFO L125 PetriNetUnfolderBase]: For 460749/460749 co-relation queries the response was YES. [2024-06-27 21:39:11,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36673 conditions, 4360 events. 2602/4360 cut-off events. For 460749/460749 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 27853 event pairs, 529 based on Foata normal form. 2/4352 useless extension candidates. Maximal degree in co-relation 36528. Up to 3685 conditions per place. [2024-06-27 21:39:11,477 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 309 selfloop transitions, 132 changer transitions 0/448 dead transitions. [2024-06-27 21:39:11,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 448 transitions, 6253 flow [2024-06-27 21:39:11,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:39:11,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:39:11,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 21:39:11,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-27 21:39:11,478 INFO L175 Difference]: Start difference. First operand has 322 places, 436 transitions, 5338 flow. Second operand 9 states and 178 transitions. [2024-06-27 21:39:11,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 448 transitions, 6253 flow [2024-06-27 21:39:13,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 448 transitions, 5842 flow, removed 96 selfloop flow, removed 7 redundant places. [2024-06-27 21:39:13,031 INFO L231 Difference]: Finished difference. Result has 324 places, 436 transitions, 5198 flow [2024-06-27 21:39:13,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4927, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5198, PETRI_PLACES=324, PETRI_TRANSITIONS=436} [2024-06-27 21:39:13,032 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-27 21:39:13,032 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 436 transitions, 5198 flow [2024-06-27 21:39:13,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:13,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:13,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:13,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 21:39:13,033 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:39:13,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:13,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1277439750, now seen corresponding path program 1 times [2024-06-27 21:39:13,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:13,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031055283] [2024-06-27 21:39:13,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:13,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:13,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:13,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:13,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:13,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031055283] [2024-06-27 21:39:13,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031055283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:13,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:13,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:39:13,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139271757] [2024-06-27 21:39:13,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:13,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:39:13,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:13,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:39:13,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:39:13,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:39:13,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 436 transitions, 5198 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:13,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:13,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:39:13,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:14,537 INFO L124 PetriNetUnfolderBase]: 2612/4382 cut-off events. [2024-06-27 21:39:14,537 INFO L125 PetriNetUnfolderBase]: For 467300/467300 co-relation queries the response was YES. [2024-06-27 21:39:14,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36705 conditions, 4382 events. 2612/4382 cut-off events. For 467300/467300 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 28029 event pairs, 510 based on Foata normal form. 2/4375 useless extension candidates. Maximal degree in co-relation 36559. Up to 3836 conditions per place. [2024-06-27 21:39:14,597 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 384 selfloop transitions, 62 changer transitions 0/453 dead transitions. [2024-06-27 21:39:14,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 453 transitions, 6218 flow [2024-06-27 21:39:14,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:39:14,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:39:14,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-27 21:39:14,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4931972789115646 [2024-06-27 21:39:14,598 INFO L175 Difference]: Start difference. First operand has 324 places, 436 transitions, 5198 flow. Second operand 7 states and 145 transitions. [2024-06-27 21:39:14,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 453 transitions, 6218 flow [2024-06-27 21:39:16,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 453 transitions, 5849 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-27 21:39:16,049 INFO L231 Difference]: Finished difference. Result has 323 places, 439 transitions, 5050 flow [2024-06-27 21:39:16,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4829, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5050, PETRI_PLACES=323, PETRI_TRANSITIONS=439} [2024-06-27 21:39:16,049 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 280 predicate places. [2024-06-27 21:39:16,049 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 439 transitions, 5050 flow [2024-06-27 21:39:16,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:16,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:16,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:16,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 21:39:16,050 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:39:16,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:16,050 INFO L85 PathProgramCache]: Analyzing trace with hash 339508296, now seen corresponding path program 2 times [2024-06-27 21:39:16,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:16,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119635587] [2024-06-27 21:39:16,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:16,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:16,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:16,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:16,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:16,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119635587] [2024-06-27 21:39:16,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119635587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:16,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:16,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:39:16,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744200866] [2024-06-27 21:39:16,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:16,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:39:16,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:16,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:39:16,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:39:16,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:39:16,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 439 transitions, 5050 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:16,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:16,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:39:16,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:17,714 INFO L124 PetriNetUnfolderBase]: 2643/4433 cut-off events. [2024-06-27 21:39:17,715 INFO L125 PetriNetUnfolderBase]: For 481953/481953 co-relation queries the response was YES. [2024-06-27 21:39:17,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37140 conditions, 4433 events. 2643/4433 cut-off events. For 481953/481953 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 28364 event pairs, 511 based on Foata normal form. 2/4426 useless extension candidates. Maximal degree in co-relation 36993. Up to 3736 conditions per place. [2024-06-27 21:39:17,772 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 348 selfloop transitions, 110 changer transitions 0/465 dead transitions. [2024-06-27 21:39:17,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 465 transitions, 6396 flow [2024-06-27 21:39:17,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:39:17,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:39:17,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-27 21:39:17,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49702380952380953 [2024-06-27 21:39:17,773 INFO L175 Difference]: Start difference. First operand has 323 places, 439 transitions, 5050 flow. Second operand 8 states and 167 transitions. [2024-06-27 21:39:17,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 465 transitions, 6396 flow [2024-06-27 21:39:19,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 465 transitions, 6253 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 21:39:19,687 INFO L231 Difference]: Finished difference. Result has 327 places, 448 transitions, 5373 flow [2024-06-27 21:39:19,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4907, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5373, PETRI_PLACES=327, PETRI_TRANSITIONS=448} [2024-06-27 21:39:19,687 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 284 predicate places. [2024-06-27 21:39:19,687 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 448 transitions, 5373 flow [2024-06-27 21:39:19,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:19,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:19,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:19,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 21:39:19,688 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:39:19,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:19,688 INFO L85 PathProgramCache]: Analyzing trace with hash -235444492, now seen corresponding path program 3 times [2024-06-27 21:39:19,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:19,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664573623] [2024-06-27 21:39:19,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:19,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:19,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:20,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:20,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:20,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664573623] [2024-06-27 21:39:20,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664573623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:20,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:20,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:39:20,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512838687] [2024-06-27 21:39:20,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:20,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:39:20,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:20,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:39:20,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:39:20,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:39:20,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 448 transitions, 5373 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:20,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:20,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:39:20,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:21,292 INFO L124 PetriNetUnfolderBase]: 2637/4425 cut-off events. [2024-06-27 21:39:21,292 INFO L125 PetriNetUnfolderBase]: For 482479/482479 co-relation queries the response was YES. [2024-06-27 21:39:21,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37247 conditions, 4425 events. 2637/4425 cut-off events. For 482479/482479 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 28346 event pairs, 508 based on Foata normal form. 2/4418 useless extension candidates. Maximal degree in co-relation 37098. Up to 3731 conditions per place. [2024-06-27 21:39:21,350 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 332 selfloop transitions, 125 changer transitions 0/464 dead transitions. [2024-06-27 21:39:21,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 464 transitions, 6365 flow [2024-06-27 21:39:21,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:39:21,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:39:21,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-27 21:39:21,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49404761904761907 [2024-06-27 21:39:21,351 INFO L175 Difference]: Start difference. First operand has 327 places, 448 transitions, 5373 flow. Second operand 8 states and 166 transitions. [2024-06-27 21:39:21,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 464 transitions, 6365 flow [2024-06-27 21:39:23,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 464 transitions, 6243 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-27 21:39:23,496 INFO L231 Difference]: Finished difference. Result has 331 places, 448 transitions, 5515 flow [2024-06-27 21:39:23,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5251, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5515, PETRI_PLACES=331, PETRI_TRANSITIONS=448} [2024-06-27 21:39:23,497 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 288 predicate places. [2024-06-27 21:39:23,497 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 448 transitions, 5515 flow [2024-06-27 21:39:23,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:23,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:23,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:23,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 21:39:23,497 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:39:23,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:23,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1313871142, now seen corresponding path program 4 times [2024-06-27 21:39:23,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:23,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702271189] [2024-06-27 21:39:23,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:23,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:23,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:24,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:24,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:24,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702271189] [2024-06-27 21:39:24,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702271189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:24,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:24,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:39:24,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95795896] [2024-06-27 21:39:24,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:24,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:39:24,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:24,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:39:24,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:39:24,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:39:24,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 448 transitions, 5515 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:24,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:24,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:39:24,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:25,065 INFO L124 PetriNetUnfolderBase]: 2647/4439 cut-off events. [2024-06-27 21:39:25,065 INFO L125 PetriNetUnfolderBase]: For 482893/482893 co-relation queries the response was YES. [2024-06-27 21:39:25,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37623 conditions, 4439 events. 2647/4439 cut-off events. For 482893/482893 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 28448 event pairs, 512 based on Foata normal form. 2/4432 useless extension candidates. Maximal degree in co-relation 37473. Up to 3919 conditions per place. [2024-06-27 21:39:25,128 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 422 selfloop transitions, 40 changer transitions 0/469 dead transitions. [2024-06-27 21:39:25,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 469 transitions, 6585 flow [2024-06-27 21:39:25,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:39:25,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:39:25,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 21:39:25,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2024-06-27 21:39:25,129 INFO L175 Difference]: Start difference. First operand has 331 places, 448 transitions, 5515 flow. Second operand 8 states and 159 transitions. [2024-06-27 21:39:25,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 469 transitions, 6585 flow [2024-06-27 21:39:27,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 469 transitions, 6339 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 21:39:27,112 INFO L231 Difference]: Finished difference. Result has 332 places, 451 transitions, 5434 flow [2024-06-27 21:39:27,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5269, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5434, PETRI_PLACES=332, PETRI_TRANSITIONS=451} [2024-06-27 21:39:27,112 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-27 21:39:27,113 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 451 transitions, 5434 flow [2024-06-27 21:39:27,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:27,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:27,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:27,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 21:39:27,113 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:39:27,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:27,113 INFO L85 PathProgramCache]: Analyzing trace with hash 726609674, now seen corresponding path program 5 times [2024-06-27 21:39:27,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:27,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770982303] [2024-06-27 21:39:27,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:27,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:27,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:27,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:27,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:27,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770982303] [2024-06-27 21:39:27,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770982303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:27,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:27,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:39:27,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604715740] [2024-06-27 21:39:27,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:27,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:39:27,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:27,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:39:27,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:39:27,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:39:27,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 451 transitions, 5434 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:27,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:27,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:39:27,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:28,707 INFO L124 PetriNetUnfolderBase]: 2657/4459 cut-off events. [2024-06-27 21:39:28,707 INFO L125 PetriNetUnfolderBase]: For 482847/482847 co-relation queries the response was YES. [2024-06-27 21:39:28,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37590 conditions, 4459 events. 2657/4459 cut-off events. For 482847/482847 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 28596 event pairs, 511 based on Foata normal form. 2/4452 useless extension candidates. Maximal degree in co-relation 37440. Up to 3796 conditions per place. [2024-06-27 21:39:28,766 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 387 selfloop transitions, 77 changer transitions 0/471 dead transitions. [2024-06-27 21:39:28,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 471 transitions, 6710 flow [2024-06-27 21:39:28,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:39:28,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:39:28,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-27 21:39:28,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-27 21:39:28,768 INFO L175 Difference]: Start difference. First operand has 332 places, 451 transitions, 5434 flow. Second operand 8 states and 162 transitions. [2024-06-27 21:39:28,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 471 transitions, 6710 flow [2024-06-27 21:39:30,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 471 transitions, 6581 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-27 21:39:30,451 INFO L231 Difference]: Finished difference. Result has 334 places, 454 transitions, 5545 flow [2024-06-27 21:39:30,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5305, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5545, PETRI_PLACES=334, PETRI_TRANSITIONS=454} [2024-06-27 21:39:30,452 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 291 predicate places. [2024-06-27 21:39:30,452 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 454 transitions, 5545 flow [2024-06-27 21:39:30,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:30,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:30,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:30,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 21:39:30,452 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:39:30,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:30,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1910540776, now seen corresponding path program 6 times [2024-06-27 21:39:30,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:30,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669135789] [2024-06-27 21:39:30,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:30,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:30,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:31,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:31,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:31,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669135789] [2024-06-27 21:39:31,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669135789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:31,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:31,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:39:31,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245513758] [2024-06-27 21:39:31,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:31,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:39:31,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:31,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:39:31,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:39:31,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:39:31,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 454 transitions, 5545 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:31,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:31,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:39:31,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:32,140 INFO L124 PetriNetUnfolderBase]: 2651/4449 cut-off events. [2024-06-27 21:39:32,140 INFO L125 PetriNetUnfolderBase]: For 482552/482552 co-relation queries the response was YES. [2024-06-27 21:39:32,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37467 conditions, 4449 events. 2651/4449 cut-off events. For 482552/482552 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 28566 event pairs, 507 based on Foata normal form. 2/4442 useless extension candidates. Maximal degree in co-relation 37316. Up to 3791 conditions per place. [2024-06-27 21:39:32,200 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 378 selfloop transitions, 85 changer transitions 0/470 dead transitions. [2024-06-27 21:39:32,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 470 transitions, 6549 flow [2024-06-27 21:39:32,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:39:32,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:39:32,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-27 21:39:32,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-27 21:39:32,201 INFO L175 Difference]: Start difference. First operand has 334 places, 454 transitions, 5545 flow. Second operand 8 states and 162 transitions. [2024-06-27 21:39:32,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 470 transitions, 6549 flow [2024-06-27 21:39:34,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 470 transitions, 6311 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-27 21:39:34,288 INFO L231 Difference]: Finished difference. Result has 337 places, 454 transitions, 5485 flow [2024-06-27 21:39:34,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5307, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5485, PETRI_PLACES=337, PETRI_TRANSITIONS=454} [2024-06-27 21:39:34,289 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 294 predicate places. [2024-06-27 21:39:34,289 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 454 transitions, 5485 flow [2024-06-27 21:39:34,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:34,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:34,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:34,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 21:39:34,290 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:39:34,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:34,290 INFO L85 PathProgramCache]: Analyzing trace with hash 294621700, now seen corresponding path program 7 times [2024-06-27 21:39:34,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:34,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109792130] [2024-06-27 21:39:34,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:34,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:34,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:34,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:34,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:34,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109792130] [2024-06-27 21:39:34,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109792130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:34,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:34,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:39:34,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210518303] [2024-06-27 21:39:34,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:34,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:39:34,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:34,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:39:34,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:39:35,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:39:35,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 454 transitions, 5485 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:35,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:35,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:39:35,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:35,979 INFO L124 PetriNetUnfolderBase]: 2677/4478 cut-off events. [2024-06-27 21:39:35,979 INFO L125 PetriNetUnfolderBase]: For 500959/500959 co-relation queries the response was YES. [2024-06-27 21:39:36,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37994 conditions, 4478 events. 2677/4478 cut-off events. For 500959/500959 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 28765 event pairs, 529 based on Foata normal form. 2/4468 useless extension candidates. Maximal degree in co-relation 37842. Up to 3558 conditions per place. [2024-06-27 21:39:36,045 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 303 selfloop transitions, 166 changer transitions 0/476 dead transitions. [2024-06-27 21:39:36,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 476 transitions, 7041 flow [2024-06-27 21:39:36,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:39:36,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:39:36,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-27 21:39:36,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49107142857142855 [2024-06-27 21:39:36,046 INFO L175 Difference]: Start difference. First operand has 337 places, 454 transitions, 5485 flow. Second operand 8 states and 165 transitions. [2024-06-27 21:39:36,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 476 transitions, 7041 flow [2024-06-27 21:39:37,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 476 transitions, 6803 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 21:39:37,988 INFO L231 Difference]: Finished difference. Result has 337 places, 460 transitions, 5730 flow [2024-06-27 21:39:37,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5247, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5730, PETRI_PLACES=337, PETRI_TRANSITIONS=460} [2024-06-27 21:39:37,989 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 294 predicate places. [2024-06-27 21:39:37,989 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 460 transitions, 5730 flow [2024-06-27 21:39:37,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:37,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:37,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:37,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 21:39:37,990 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:39:37,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:37,991 INFO L85 PathProgramCache]: Analyzing trace with hash 2004224518, now seen corresponding path program 8 times [2024-06-27 21:39:37,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:37,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149917365] [2024-06-27 21:39:37,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:37,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:37,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:38,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:38,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:38,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149917365] [2024-06-27 21:39:38,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149917365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:38,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:38,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:39:38,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613060343] [2024-06-27 21:39:38,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:38,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:39:38,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:38,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:39:38,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:39:38,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:39:38,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 460 transitions, 5730 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:38,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:38,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:39:38,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:39,822 INFO L124 PetriNetUnfolderBase]: 2692/4514 cut-off events. [2024-06-27 21:39:39,823 INFO L125 PetriNetUnfolderBase]: For 510946/510946 co-relation queries the response was YES. [2024-06-27 21:39:39,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38522 conditions, 4514 events. 2692/4514 cut-off events. For 510946/510946 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 29018 event pairs, 516 based on Foata normal form. 2/4507 useless extension candidates. Maximal degree in co-relation 38369. Up to 4006 conditions per place. [2024-06-27 21:39:39,886 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 415 selfloop transitions, 55 changer transitions 0/477 dead transitions. [2024-06-27 21:39:39,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 477 transitions, 6830 flow [2024-06-27 21:39:39,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:39:39,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:39:39,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 21:39:39,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-27 21:39:39,889 INFO L175 Difference]: Start difference. First operand has 337 places, 460 transitions, 5730 flow. Second operand 8 states and 155 transitions. [2024-06-27 21:39:39,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 477 transitions, 6830 flow [2024-06-27 21:39:41,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 477 transitions, 6416 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-27 21:39:41,872 INFO L231 Difference]: Finished difference. Result has 340 places, 466 transitions, 5558 flow [2024-06-27 21:39:41,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5330, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5558, PETRI_PLACES=340, PETRI_TRANSITIONS=466} [2024-06-27 21:39:41,872 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-27 21:39:41,873 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 466 transitions, 5558 flow [2024-06-27 21:39:41,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:41,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:41,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:41,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 21:39:41,873 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:39:41,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:41,874 INFO L85 PathProgramCache]: Analyzing trace with hash -109637210, now seen corresponding path program 9 times [2024-06-27 21:39:41,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:41,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898877575] [2024-06-27 21:39:41,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:41,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:41,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:42,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:42,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:42,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898877575] [2024-06-27 21:39:42,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898877575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:42,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:42,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:39:42,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73333897] [2024-06-27 21:39:42,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:42,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:39:42,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:42,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:39:42,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:39:42,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:39:42,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 466 transitions, 5558 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:42,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:42,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:39:42,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:43,903 INFO L124 PetriNetUnfolderBase]: 2702/4532 cut-off events. [2024-06-27 21:39:43,903 INFO L125 PetriNetUnfolderBase]: For 518299/518299 co-relation queries the response was YES. [2024-06-27 21:39:43,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38334 conditions, 4532 events. 2702/4532 cut-off events. For 518299/518299 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 29183 event pairs, 513 based on Foata normal form. 2/4525 useless extension candidates. Maximal degree in co-relation 38180. Up to 3979 conditions per place. [2024-06-27 21:39:43,968 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 415 selfloop transitions, 63 changer transitions 0/485 dead transitions. [2024-06-27 21:39:43,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 485 transitions, 6854 flow [2024-06-27 21:39:43,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:39:43,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:39:43,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-27 21:39:43,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 21:39:43,969 INFO L175 Difference]: Start difference. First operand has 340 places, 466 transitions, 5558 flow. Second operand 10 states and 190 transitions. [2024-06-27 21:39:43,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 485 transitions, 6854 flow [2024-06-27 21:39:45,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 485 transitions, 6619 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-27 21:39:45,988 INFO L231 Difference]: Finished difference. Result has 345 places, 469 transitions, 5534 flow [2024-06-27 21:39:45,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5323, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5534, PETRI_PLACES=345, PETRI_TRANSITIONS=469} [2024-06-27 21:39:45,988 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-27 21:39:45,988 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 469 transitions, 5534 flow [2024-06-27 21:39:45,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:45,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:45,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:45,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 21:39:45,989 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:39:45,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:45,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1752485608, now seen corresponding path program 10 times [2024-06-27 21:39:45,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:45,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142747946] [2024-06-27 21:39:45,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:45,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:45,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:46,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:46,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:46,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142747946] [2024-06-27 21:39:46,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142747946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:46,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:46,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:39:46,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894838830] [2024-06-27 21:39:46,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:46,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:39:46,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:46,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:39:46,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:39:46,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:39:46,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 469 transitions, 5534 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:46,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:46,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:39:46,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:47,739 INFO L124 PetriNetUnfolderBase]: 2712/4537 cut-off events. [2024-06-27 21:39:47,740 INFO L125 PetriNetUnfolderBase]: For 527654/527654 co-relation queries the response was YES. [2024-06-27 21:39:47,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38415 conditions, 4537 events. 2712/4537 cut-off events. For 527654/527654 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 29252 event pairs, 534 based on Foata normal form. 2/4527 useless extension candidates. Maximal degree in co-relation 38260. Up to 3592 conditions per place. [2024-06-27 21:39:47,798 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 322 selfloop transitions, 158 changer transitions 0/487 dead transitions. [2024-06-27 21:39:47,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 487 transitions, 6852 flow [2024-06-27 21:39:47,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:39:47,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:39:47,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-27 21:39:47,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-27 21:39:47,800 INFO L175 Difference]: Start difference. First operand has 345 places, 469 transitions, 5534 flow. Second operand 8 states and 164 transitions. [2024-06-27 21:39:47,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 487 transitions, 6852 flow [2024-06-27 21:39:50,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 487 transitions, 6601 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-27 21:39:50,006 INFO L231 Difference]: Finished difference. Result has 345 places, 472 transitions, 5680 flow [2024-06-27 21:39:50,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5283, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5680, PETRI_PLACES=345, PETRI_TRANSITIONS=472} [2024-06-27 21:39:50,006 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-27 21:39:50,006 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 472 transitions, 5680 flow [2024-06-27 21:39:50,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:50,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:50,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:50,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 21:39:50,007 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:39:50,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:50,007 INFO L85 PathProgramCache]: Analyzing trace with hash -109904120, now seen corresponding path program 11 times [2024-06-27 21:39:50,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:50,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492425826] [2024-06-27 21:39:50,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:50,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:50,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:50,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:50,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:50,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492425826] [2024-06-27 21:39:50,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492425826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:50,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:50,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:39:50,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808544939] [2024-06-27 21:39:50,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:50,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:39:50,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:50,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:39:50,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:39:50,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:39:50,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 472 transitions, 5680 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:50,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:50,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:39:50,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:51,783 INFO L124 PetriNetUnfolderBase]: 2706/4538 cut-off events. [2024-06-27 21:39:51,783 INFO L125 PetriNetUnfolderBase]: For 527008/527008 co-relation queries the response was YES. [2024-06-27 21:39:51,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38393 conditions, 4538 events. 2706/4538 cut-off events. For 527008/527008 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 29229 event pairs, 515 based on Foata normal form. 2/4531 useless extension candidates. Maximal degree in co-relation 38238. Up to 3988 conditions per place. [2024-06-27 21:39:51,849 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 417 selfloop transitions, 60 changer transitions 0/484 dead transitions. [2024-06-27 21:39:51,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 484 transitions, 6688 flow [2024-06-27 21:39:51,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:39:51,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:39:51,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 21:39:51,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 21:39:51,850 INFO L175 Difference]: Start difference. First operand has 345 places, 472 transitions, 5680 flow. Second operand 8 states and 156 transitions. [2024-06-27 21:39:51,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 484 transitions, 6688 flow [2024-06-27 21:39:53,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 484 transitions, 6158 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-27 21:39:53,745 INFO L231 Difference]: Finished difference. Result has 346 places, 472 transitions, 5277 flow [2024-06-27 21:39:53,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5150, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5277, PETRI_PLACES=346, PETRI_TRANSITIONS=472} [2024-06-27 21:39:53,746 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2024-06-27 21:39:53,746 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 472 transitions, 5277 flow [2024-06-27 21:39:53,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:53,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:53,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:53,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 21:39:53,746 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:39:53,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:53,746 INFO L85 PathProgramCache]: Analyzing trace with hash 37705480, now seen corresponding path program 12 times [2024-06-27 21:39:53,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:53,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092293032] [2024-06-27 21:39:53,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:53,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:53,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:54,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:54,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:54,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092293032] [2024-06-27 21:39:54,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092293032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:54,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:54,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:39:54,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160670814] [2024-06-27 21:39:54,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:54,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:39:54,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:54,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:39:54,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:39:54,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:39:54,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 472 transitions, 5277 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:54,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:54,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:39:54,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:55,410 INFO L124 PetriNetUnfolderBase]: 2700/4521 cut-off events. [2024-06-27 21:39:55,410 INFO L125 PetriNetUnfolderBase]: For 523668/523668 co-relation queries the response was YES. [2024-06-27 21:39:55,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37651 conditions, 4521 events. 2700/4521 cut-off events. For 523668/523668 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 29155 event pairs, 538 based on Foata normal form. 2/4511 useless extension candidates. Maximal degree in co-relation 37495. Up to 3582 conditions per place. [2024-06-27 21:39:55,477 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 326 selfloop transitions, 153 changer transitions 0/486 dead transitions. [2024-06-27 21:39:55,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 486 transitions, 6317 flow [2024-06-27 21:39:55,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:39:55,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:39:55,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-27 21:39:55,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-27 21:39:55,478 INFO L175 Difference]: Start difference. First operand has 346 places, 472 transitions, 5277 flow. Second operand 8 states and 162 transitions. [2024-06-27 21:39:55,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 486 transitions, 6317 flow [2024-06-27 21:39:57,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 486 transitions, 6159 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-27 21:39:57,739 INFO L231 Difference]: Finished difference. Result has 347 places, 472 transitions, 5433 flow [2024-06-27 21:39:57,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5119, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5433, PETRI_PLACES=347, PETRI_TRANSITIONS=472} [2024-06-27 21:39:57,740 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 304 predicate places. [2024-06-27 21:39:57,740 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 472 transitions, 5433 flow [2024-06-27 21:39:57,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:57,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:57,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:57,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 21:39:57,740 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:39:57,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:57,740 INFO L85 PathProgramCache]: Analyzing trace with hash 45980778, now seen corresponding path program 1 times [2024-06-27 21:39:57,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:57,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326709969] [2024-06-27 21:39:57,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:57,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:57,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:58,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:58,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:58,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326709969] [2024-06-27 21:39:58,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326709969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:58,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:58,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:39:58,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701733469] [2024-06-27 21:39:58,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:58,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:39:58,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:58,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:39:58,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:39:58,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:39:58,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 472 transitions, 5433 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:58,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:58,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:39:58,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:59,576 INFO L124 PetriNetUnfolderBase]: 2708/4542 cut-off events. [2024-06-27 21:39:59,577 INFO L125 PetriNetUnfolderBase]: For 533353/533353 co-relation queries the response was YES. [2024-06-27 21:39:59,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38114 conditions, 4542 events. 2708/4542 cut-off events. For 533353/533353 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 29225 event pairs, 423 based on Foata normal form. 2/4535 useless extension candidates. Maximal degree in co-relation 37957. Up to 4042 conditions per place. [2024-06-27 21:39:59,634 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 462 selfloop transitions, 20 changer transitions 0/489 dead transitions. [2024-06-27 21:39:59,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 489 transitions, 6477 flow [2024-06-27 21:39:59,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:39:59,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:39:59,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-27 21:39:59,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-06-27 21:39:59,635 INFO L175 Difference]: Start difference. First operand has 347 places, 472 transitions, 5433 flow. Second operand 7 states and 136 transitions. [2024-06-27 21:39:59,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 489 transitions, 6477 flow [2024-06-27 21:40:02,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 489 transitions, 6048 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-27 21:40:02,170 INFO L231 Difference]: Finished difference. Result has 345 places, 474 transitions, 5093 flow [2024-06-27 21:40:02,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5004, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5093, PETRI_PLACES=345, PETRI_TRANSITIONS=474} [2024-06-27 21:40:02,171 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-27 21:40:02,171 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 474 transitions, 5093 flow [2024-06-27 21:40:02,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:02,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:02,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:02,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 21:40:02,171 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:40:02,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:02,171 INFO L85 PathProgramCache]: Analyzing trace with hash 339416040, now seen corresponding path program 2 times [2024-06-27 21:40:02,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:02,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043379265] [2024-06-27 21:40:02,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:02,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:02,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:02,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:02,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:02,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043379265] [2024-06-27 21:40:02,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043379265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:02,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:02,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:40:02,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456797954] [2024-06-27 21:40:02,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:02,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:40:02,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:02,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:40:02,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:40:02,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:40:02,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 474 transitions, 5093 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:02,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:02,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:40:02,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:03,831 INFO L124 PetriNetUnfolderBase]: 2716/4554 cut-off events. [2024-06-27 21:40:03,831 INFO L125 PetriNetUnfolderBase]: For 540745/540745 co-relation queries the response was YES. [2024-06-27 21:40:03,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37682 conditions, 4554 events. 2716/4554 cut-off events. For 540745/540745 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 29353 event pairs, 514 based on Foata normal form. 2/4547 useless extension candidates. Maximal degree in co-relation 37526. Up to 3991 conditions per place. [2024-06-27 21:40:03,901 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 431 selfloop transitions, 52 changer transitions 0/490 dead transitions. [2024-06-27 21:40:03,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 490 transitions, 6385 flow [2024-06-27 21:40:03,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:40:03,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:40:03,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-27 21:40:03,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2024-06-27 21:40:03,902 INFO L175 Difference]: Start difference. First operand has 345 places, 474 transitions, 5093 flow. Second operand 7 states and 138 transitions. [2024-06-27 21:40:03,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 490 transitions, 6385 flow [2024-06-27 21:40:06,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 490 transitions, 6312 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 21:40:06,406 INFO L231 Difference]: Finished difference. Result has 347 places, 478 transitions, 5223 flow [2024-06-27 21:40:06,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5020, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5223, PETRI_PLACES=347, PETRI_TRANSITIONS=478} [2024-06-27 21:40:06,406 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 304 predicate places. [2024-06-27 21:40:06,406 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 478 transitions, 5223 flow [2024-06-27 21:40:06,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:06,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:06,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:06,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 21:40:06,407 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:40:06,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:06,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1398355440, now seen corresponding path program 3 times [2024-06-27 21:40:06,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:06,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535410511] [2024-06-27 21:40:06,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:06,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:06,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:07,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:07,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:07,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535410511] [2024-06-27 21:40:07,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535410511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:07,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:07,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:40:07,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747832891] [2024-06-27 21:40:07,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:07,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:40:07,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:07,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:40:07,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:40:07,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:40:07,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 478 transitions, 5223 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:07,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:07,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:40:07,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:08,178 INFO L124 PetriNetUnfolderBase]: 2746/4604 cut-off events. [2024-06-27 21:40:08,179 INFO L125 PetriNetUnfolderBase]: For 550733/550733 co-relation queries the response was YES. [2024-06-27 21:40:08,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38242 conditions, 4604 events. 2746/4604 cut-off events. For 550733/550733 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 29630 event pairs, 507 based on Foata normal form. 2/4598 useless extension candidates. Maximal degree in co-relation 38085. Up to 4128 conditions per place. [2024-06-27 21:40:08,247 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 466 selfloop transitions, 33 changer transitions 0/506 dead transitions. [2024-06-27 21:40:08,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 506 transitions, 6457 flow [2024-06-27 21:40:08,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:40:08,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:40:08,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 21:40:08,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 21:40:08,248 INFO L175 Difference]: Start difference. First operand has 347 places, 478 transitions, 5223 flow. Second operand 9 states and 168 transitions. [2024-06-27 21:40:08,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 506 transitions, 6457 flow [2024-06-27 21:40:11,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 506 transitions, 6336 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-27 21:40:11,071 INFO L231 Difference]: Finished difference. Result has 355 places, 490 transitions, 5391 flow [2024-06-27 21:40:11,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5124, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5391, PETRI_PLACES=355, PETRI_TRANSITIONS=490} [2024-06-27 21:40:11,071 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 312 predicate places. [2024-06-27 21:40:11,072 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 490 transitions, 5391 flow [2024-06-27 21:40:11,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:11,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:11,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:11,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 21:40:11,072 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:40:11,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:11,073 INFO L85 PathProgramCache]: Analyzing trace with hash 289857124, now seen corresponding path program 4 times [2024-06-27 21:40:11,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:11,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732043567] [2024-06-27 21:40:11,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:11,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:11,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:11,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:11,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:11,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732043567] [2024-06-27 21:40:11,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732043567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:11,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:11,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:40:11,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530119271] [2024-06-27 21:40:11,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:11,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:40:11,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:11,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:40:11,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:40:11,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:40:11,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 490 transitions, 5391 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:11,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:11,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:40:11,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:12,890 INFO L124 PetriNetUnfolderBase]: 2754/4612 cut-off events. [2024-06-27 21:40:12,891 INFO L125 PetriNetUnfolderBase]: For 560745/560745 co-relation queries the response was YES. [2024-06-27 21:40:12,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38430 conditions, 4612 events. 2754/4612 cut-off events. For 560745/560745 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 29697 event pairs, 516 based on Foata normal form. 2/4604 useless extension candidates. Maximal degree in co-relation 38269. Up to 4087 conditions per place. [2024-06-27 21:40:12,951 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 432 selfloop transitions, 64 changer transitions 0/503 dead transitions. [2024-06-27 21:40:12,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 503 transitions, 6451 flow [2024-06-27 21:40:12,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:40:12,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:40:12,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 21:40:12,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 21:40:12,952 INFO L175 Difference]: Start difference. First operand has 355 places, 490 transitions, 5391 flow. Second operand 8 states and 154 transitions. [2024-06-27 21:40:12,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 503 transitions, 6451 flow [2024-06-27 21:40:15,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 503 transitions, 6394 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-27 21:40:15,348 INFO L231 Difference]: Finished difference. Result has 361 places, 492 transitions, 5511 flow [2024-06-27 21:40:15,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5334, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5511, PETRI_PLACES=361, PETRI_TRANSITIONS=492} [2024-06-27 21:40:15,348 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 318 predicate places. [2024-06-27 21:40:15,348 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 492 transitions, 5511 flow [2024-06-27 21:40:15,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:15,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:15,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:15,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 21:40:15,349 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:40:15,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:15,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1604724232, now seen corresponding path program 5 times [2024-06-27 21:40:15,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:15,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658803409] [2024-06-27 21:40:15,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:15,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:15,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:16,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:16,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:16,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658803409] [2024-06-27 21:40:16,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658803409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:16,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:16,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:40:16,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838334028] [2024-06-27 21:40:16,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:16,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:40:16,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:16,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:40:16,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:40:16,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:40:16,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 492 transitions, 5511 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:16,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:16,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:40:16,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:17,061 INFO L124 PetriNetUnfolderBase]: 2762/4624 cut-off events. [2024-06-27 21:40:17,061 INFO L125 PetriNetUnfolderBase]: For 570935/570935 co-relation queries the response was YES. [2024-06-27 21:40:17,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38677 conditions, 4624 events. 2762/4624 cut-off events. For 570935/570935 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 29804 event pairs, 516 based on Foata normal form. 2/4616 useless extension candidates. Maximal degree in co-relation 38514. Up to 4099 conditions per place. [2024-06-27 21:40:17,132 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 440 selfloop transitions, 58 changer transitions 0/505 dead transitions. [2024-06-27 21:40:17,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 505 transitions, 6579 flow [2024-06-27 21:40:17,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:40:17,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:40:17,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 21:40:17,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-27 21:40:17,133 INFO L175 Difference]: Start difference. First operand has 361 places, 492 transitions, 5511 flow. Second operand 8 states and 153 transitions. [2024-06-27 21:40:17,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 505 transitions, 6579 flow [2024-06-27 21:40:19,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 505 transitions, 6422 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 21:40:19,728 INFO L231 Difference]: Finished difference. Result has 363 places, 494 transitions, 5523 flow [2024-06-27 21:40:19,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5354, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5523, PETRI_PLACES=363, PETRI_TRANSITIONS=494} [2024-06-27 21:40:19,729 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 320 predicate places. [2024-06-27 21:40:19,729 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 494 transitions, 5523 flow [2024-06-27 21:40:19,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:19,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:19,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:19,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 21:40:19,730 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:40:19,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:19,730 INFO L85 PathProgramCache]: Analyzing trace with hash 68020530, now seen corresponding path program 1 times [2024-06-27 21:40:19,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:19,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791722207] [2024-06-27 21:40:19,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:19,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:19,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:20,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:20,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:20,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791722207] [2024-06-27 21:40:20,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791722207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:20,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:20,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:40:20,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993134385] [2024-06-27 21:40:20,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:20,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:40:20,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:20,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:40:20,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:40:20,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:40:20,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 494 transitions, 5523 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:20,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:20,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:40:20,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:21,797 INFO L124 PetriNetUnfolderBase]: 2770/4641 cut-off events. [2024-06-27 21:40:21,798 INFO L125 PetriNetUnfolderBase]: For 580149/580149 co-relation queries the response was YES. [2024-06-27 21:40:21,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38844 conditions, 4641 events. 2770/4641 cut-off events. For 580149/580149 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 29864 event pairs, 510 based on Foata normal form. 2/4637 useless extension candidates. Maximal degree in co-relation 38680. Up to 4146 conditions per place. [2024-06-27 21:40:21,865 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 469 selfloop transitions, 36 changer transitions 0/512 dead transitions. [2024-06-27 21:40:21,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 512 transitions, 6630 flow [2024-06-27 21:40:21,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:40:21,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:40:21,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 21:40:21,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 21:40:21,866 INFO L175 Difference]: Start difference. First operand has 363 places, 494 transitions, 5523 flow. Second operand 9 states and 171 transitions. [2024-06-27 21:40:21,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 512 transitions, 6630 flow [2024-06-27 21:40:24,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 512 transitions, 6481 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 21:40:24,388 INFO L231 Difference]: Finished difference. Result has 366 places, 496 transitions, 5507 flow [2024-06-27 21:40:24,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5374, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5507, PETRI_PLACES=366, PETRI_TRANSITIONS=496} [2024-06-27 21:40:24,389 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 323 predicate places. [2024-06-27 21:40:24,389 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 496 transitions, 5507 flow [2024-06-27 21:40:24,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:24,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:24,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:24,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 21:40:24,390 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:40:24,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:24,390 INFO L85 PathProgramCache]: Analyzing trace with hash 83675220, now seen corresponding path program 2 times [2024-06-27 21:40:24,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:24,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712958717] [2024-06-27 21:40:24,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:24,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:24,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:25,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:25,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:25,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712958717] [2024-06-27 21:40:25,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712958717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:25,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:25,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:40:25,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302757488] [2024-06-27 21:40:25,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:25,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:40:25,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:25,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:40:25,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:40:25,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:40:25,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 496 transitions, 5507 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:25,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:25,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:40:25,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:26,442 INFO L124 PetriNetUnfolderBase]: 2778/4657 cut-off events. [2024-06-27 21:40:26,442 INFO L125 PetriNetUnfolderBase]: For 591421/591421 co-relation queries the response was YES. [2024-06-27 21:40:26,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39160 conditions, 4657 events. 2778/4657 cut-off events. For 591421/591421 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 29989 event pairs, 512 based on Foata normal form. 2/4653 useless extension candidates. Maximal degree in co-relation 38995. Up to 4149 conditions per place. [2024-06-27 21:40:26,506 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 467 selfloop transitions, 40 changer transitions 0/514 dead transitions. [2024-06-27 21:40:26,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 514 transitions, 6622 flow [2024-06-27 21:40:26,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:40:26,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:40:26,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 21:40:26,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 21:40:26,507 INFO L175 Difference]: Start difference. First operand has 366 places, 496 transitions, 5507 flow. Second operand 9 states and 171 transitions. [2024-06-27 21:40:26,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 514 transitions, 6622 flow [2024-06-27 21:40:29,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 514 transitions, 6505 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-27 21:40:29,580 INFO L231 Difference]: Finished difference. Result has 368 places, 498 transitions, 5535 flow [2024-06-27 21:40:29,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5390, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5535, PETRI_PLACES=368, PETRI_TRANSITIONS=498} [2024-06-27 21:40:29,581 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-27 21:40:29,581 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 498 transitions, 5535 flow [2024-06-27 21:40:29,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:29,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:29,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:29,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 21:40:29,581 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:40:29,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:29,581 INFO L85 PathProgramCache]: Analyzing trace with hash -246584282, now seen corresponding path program 3 times [2024-06-27 21:40:29,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:29,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873042682] [2024-06-27 21:40:29,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:29,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:29,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:30,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:30,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:30,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873042682] [2024-06-27 21:40:30,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873042682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:30,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:30,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:40:30,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270962825] [2024-06-27 21:40:30,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:30,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:40:30,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:30,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:40:30,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:40:30,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:40:30,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 498 transitions, 5535 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:30,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:30,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:40:30,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:31,481 INFO L124 PetriNetUnfolderBase]: 2786/4669 cut-off events. [2024-06-27 21:40:31,481 INFO L125 PetriNetUnfolderBase]: For 603160/603160 co-relation queries the response was YES. [2024-06-27 21:40:31,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39512 conditions, 4669 events. 2786/4669 cut-off events. For 603160/603160 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 30048 event pairs, 510 based on Foata normal form. 2/4665 useless extension candidates. Maximal degree in co-relation 39346. Up to 4135 conditions per place. [2024-06-27 21:40:31,547 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 464 selfloop transitions, 46 changer transitions 0/517 dead transitions. [2024-06-27 21:40:31,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 517 transitions, 6662 flow [2024-06-27 21:40:31,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:40:31,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:40:31,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 21:40:31,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-27 21:40:31,548 INFO L175 Difference]: Start difference. First operand has 368 places, 498 transitions, 5535 flow. Second operand 9 states and 172 transitions. [2024-06-27 21:40:31,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 517 transitions, 6662 flow [2024-06-27 21:40:34,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 517 transitions, 6533 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-27 21:40:34,580 INFO L231 Difference]: Finished difference. Result has 370 places, 500 transitions, 5567 flow [2024-06-27 21:40:34,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5406, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5567, PETRI_PLACES=370, PETRI_TRANSITIONS=500} [2024-06-27 21:40:34,580 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 327 predicate places. [2024-06-27 21:40:34,581 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 500 transitions, 5567 flow [2024-06-27 21:40:34,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:34,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:34,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:34,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 21:40:34,581 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:40:34,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:34,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1229555652, now seen corresponding path program 4 times [2024-06-27 21:40:34,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:34,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618306723] [2024-06-27 21:40:34,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:34,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:34,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:35,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:35,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:35,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618306723] [2024-06-27 21:40:35,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618306723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:35,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:35,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:40:35,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089932450] [2024-06-27 21:40:35,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:35,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:40:35,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:35,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:40:35,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:40:35,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:40:35,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 500 transitions, 5567 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:35,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:35,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:40:35,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:36,544 INFO L124 PetriNetUnfolderBase]: 2794/4678 cut-off events. [2024-06-27 21:40:36,544 INFO L125 PetriNetUnfolderBase]: For 614710/614710 co-relation queries the response was YES. [2024-06-27 21:40:36,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39879 conditions, 4678 events. 2794/4678 cut-off events. For 614710/614710 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 30175 event pairs, 526 based on Foata normal form. 2/4672 useless extension candidates. Maximal degree in co-relation 39712. Up to 4119 conditions per place. [2024-06-27 21:40:36,612 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 446 selfloop transitions, 62 changer transitions 0/515 dead transitions. [2024-06-27 21:40:36,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 515 transitions, 6682 flow [2024-06-27 21:40:36,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:40:36,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:40:36,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 21:40:36,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 21:40:36,613 INFO L175 Difference]: Start difference. First operand has 370 places, 500 transitions, 5567 flow. Second operand 9 states and 171 transitions. [2024-06-27 21:40:36,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 515 transitions, 6682 flow [2024-06-27 21:40:39,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 515 transitions, 6537 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-27 21:40:39,842 INFO L231 Difference]: Finished difference. Result has 372 places, 502 transitions, 5619 flow [2024-06-27 21:40:39,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5422, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5619, PETRI_PLACES=372, PETRI_TRANSITIONS=502} [2024-06-27 21:40:39,842 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 329 predicate places. [2024-06-27 21:40:39,842 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 502 transitions, 5619 flow [2024-06-27 21:40:39,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:39,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:39,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:39,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 21:40:39,843 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:40:39,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:39,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1239078852, now seen corresponding path program 5 times [2024-06-27 21:40:39,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:39,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365226877] [2024-06-27 21:40:39,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:39,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:39,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:40,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:40,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:40,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365226877] [2024-06-27 21:40:40,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365226877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:40,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:40,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:40:40,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30057869] [2024-06-27 21:40:40,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:40,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:40:40,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:40,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:40:40,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:40:40,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:40:40,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 502 transitions, 5619 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:40,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:40,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:40:40,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:41,769 INFO L124 PetriNetUnfolderBase]: 2815/4709 cut-off events. [2024-06-27 21:40:41,769 INFO L125 PetriNetUnfolderBase]: For 640875/640875 co-relation queries the response was YES. [2024-06-27 21:40:41,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40700 conditions, 4709 events. 2815/4709 cut-off events. For 640875/640875 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 30338 event pairs, 525 based on Foata normal form. 2/4703 useless extension candidates. Maximal degree in co-relation 40532. Up to 4107 conditions per place. [2024-06-27 21:40:41,837 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 436 selfloop transitions, 79 changer transitions 0/522 dead transitions. [2024-06-27 21:40:41,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 522 transitions, 7061 flow [2024-06-27 21:40:41,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:40:41,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:40:41,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 21:40:41,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-27 21:40:41,838 INFO L175 Difference]: Start difference. First operand has 372 places, 502 transitions, 5619 flow. Second operand 9 states and 173 transitions. [2024-06-27 21:40:41,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 522 transitions, 7061 flow [2024-06-27 21:40:45,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 522 transitions, 6880 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-27 21:40:45,354 INFO L231 Difference]: Finished difference. Result has 375 places, 507 transitions, 5768 flow [2024-06-27 21:40:45,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5438, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5768, PETRI_PLACES=375, PETRI_TRANSITIONS=507} [2024-06-27 21:40:45,355 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 332 predicate places. [2024-06-27 21:40:45,355 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 507 transitions, 5768 flow [2024-06-27 21:40:45,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:45,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:45,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:45,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 21:40:45,356 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:40:45,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:45,356 INFO L85 PathProgramCache]: Analyzing trace with hash 824768356, now seen corresponding path program 6 times [2024-06-27 21:40:45,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:45,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903279799] [2024-06-27 21:40:45,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:45,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:45,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:46,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:46,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:46,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903279799] [2024-06-27 21:40:46,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903279799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:46,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:46,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:40:46,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117993228] [2024-06-27 21:40:46,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:46,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:40:46,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:46,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:40:46,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:40:46,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:40:46,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 507 transitions, 5768 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:46,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:46,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:40:46,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:47,369 INFO L124 PetriNetUnfolderBase]: 2823/4725 cut-off events. [2024-06-27 21:40:47,369 INFO L125 PetriNetUnfolderBase]: For 654509/654509 co-relation queries the response was YES. [2024-06-27 21:40:47,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41149 conditions, 4725 events. 2823/4725 cut-off events. For 654509/654509 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 30519 event pairs, 529 based on Foata normal form. 2/4719 useless extension candidates. Maximal degree in co-relation 40979. Up to 4142 conditions per place. [2024-06-27 21:40:47,438 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 446 selfloop transitions, 69 changer transitions 0/522 dead transitions. [2024-06-27 21:40:47,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 522 transitions, 6905 flow [2024-06-27 21:40:47,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:40:47,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:40:47,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 21:40:47,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 21:40:47,439 INFO L175 Difference]: Start difference. First operand has 375 places, 507 transitions, 5768 flow. Second operand 9 states and 171 transitions. [2024-06-27 21:40:47,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 522 transitions, 6905 flow [2024-06-27 21:40:50,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 522 transitions, 6725 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-27 21:40:51,001 INFO L231 Difference]: Finished difference. Result has 379 places, 509 transitions, 5807 flow [2024-06-27 21:40:51,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5588, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5807, PETRI_PLACES=379, PETRI_TRANSITIONS=509} [2024-06-27 21:40:51,001 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-27 21:40:51,001 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 509 transitions, 5807 flow [2024-06-27 21:40:51,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:51,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:51,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:51,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 21:40:51,002 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:40:51,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:51,002 INFO L85 PathProgramCache]: Analyzing trace with hash 809113666, now seen corresponding path program 7 times [2024-06-27 21:40:51,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:51,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908307625] [2024-06-27 21:40:51,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:51,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:51,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:51,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:51,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:51,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908307625] [2024-06-27 21:40:51,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908307625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:51,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:51,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:40:51,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698027792] [2024-06-27 21:40:51,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:51,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:40:51,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:51,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:40:51,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:40:52,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:40:52,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 509 transitions, 5807 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:52,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:52,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:40:52,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:53,123 INFO L124 PetriNetUnfolderBase]: 2831/4733 cut-off events. [2024-06-27 21:40:53,123 INFO L125 PetriNetUnfolderBase]: For 665409/665409 co-relation queries the response was YES. [2024-06-27 21:40:53,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41505 conditions, 4733 events. 2831/4733 cut-off events. For 665409/665409 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 30529 event pairs, 527 based on Foata normal form. 2/4727 useless extension candidates. Maximal degree in co-relation 41333. Up to 4174 conditions per place. [2024-06-27 21:40:53,188 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 458 selfloop transitions, 59 changer transitions 0/524 dead transitions. [2024-06-27 21:40:53,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 524 transitions, 6928 flow [2024-06-27 21:40:53,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:40:53,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:40:53,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 21:40:53,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 21:40:53,189 INFO L175 Difference]: Start difference. First operand has 379 places, 509 transitions, 5807 flow. Second operand 9 states and 171 transitions. [2024-06-27 21:40:53,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 524 transitions, 6928 flow [2024-06-27 21:40:56,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 524 transitions, 6725 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-27 21:40:57,005 INFO L231 Difference]: Finished difference. Result has 381 places, 511 transitions, 5783 flow [2024-06-27 21:40:57,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5604, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5783, PETRI_PLACES=381, PETRI_TRANSITIONS=511} [2024-06-27 21:40:57,005 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 338 predicate places. [2024-06-27 21:40:57,005 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 511 transitions, 5783 flow [2024-06-27 21:40:57,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:57,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:57,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:57,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 21:40:57,006 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:40:57,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:57,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1292978908, now seen corresponding path program 8 times [2024-06-27 21:40:57,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:57,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527574894] [2024-06-27 21:40:57,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:57,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:57,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:57,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:57,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:57,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527574894] [2024-06-27 21:40:57,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527574894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:57,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:57,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:40:57,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174993546] [2024-06-27 21:40:57,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:57,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:40:57,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:57,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:40:57,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:40:57,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:40:57,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 511 transitions, 5783 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:57,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:57,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:40:57,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:58,956 INFO L124 PetriNetUnfolderBase]: 2826/4726 cut-off events. [2024-06-27 21:40:58,956 INFO L125 PetriNetUnfolderBase]: For 661489/661489 co-relation queries the response was YES. [2024-06-27 21:40:59,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41163 conditions, 4726 events. 2826/4726 cut-off events. For 661489/661489 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 30530 event pairs, 526 based on Foata normal form. 2/4720 useless extension candidates. Maximal degree in co-relation 40990. Up to 4155 conditions per place. [2024-06-27 21:40:59,026 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 445 selfloop transitions, 73 changer transitions 0/525 dead transitions. [2024-06-27 21:40:59,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 525 transitions, 6891 flow [2024-06-27 21:40:59,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:40:59,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:40:59,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 21:40:59,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 21:40:59,027 INFO L175 Difference]: Start difference. First operand has 381 places, 511 transitions, 5783 flow. Second operand 9 states and 171 transitions. [2024-06-27 21:40:59,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 525 transitions, 6891 flow [2024-06-27 21:41:01,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 525 transitions, 6668 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-27 21:41:01,997 INFO L231 Difference]: Finished difference. Result has 383 places, 512 transitions, 5750 flow [2024-06-27 21:41:01,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5586, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5750, PETRI_PLACES=383, PETRI_TRANSITIONS=512} [2024-06-27 21:41:01,997 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-27 21:41:01,997 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 512 transitions, 5750 flow [2024-06-27 21:41:01,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:01,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:41:01,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:41:01,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 21:41:01,998 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:41:01,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:41:01,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1072929734, now seen corresponding path program 9 times [2024-06-27 21:41:01,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:41:01,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844202653] [2024-06-27 21:41:01,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:41:01,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:41:02,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:41:02,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:41:02,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:41:02,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844202653] [2024-06-27 21:41:02,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844202653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:41:02,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:41:02,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:41:02,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044275090] [2024-06-27 21:41:02,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:41:02,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:41:02,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:41:02,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:41:02,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:41:02,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:41:02,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 512 transitions, 5750 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:02,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:41:02,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:41:02,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:41:03,911 INFO L124 PetriNetUnfolderBase]: 2834/4742 cut-off events. [2024-06-27 21:41:03,911 INFO L125 PetriNetUnfolderBase]: For 671372/671372 co-relation queries the response was YES. [2024-06-27 21:41:03,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41249 conditions, 4742 events. 2834/4742 cut-off events. For 671372/671372 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 30635 event pairs, 528 based on Foata normal form. 2/4736 useless extension candidates. Maximal degree in co-relation 41075. Up to 4120 conditions per place. [2024-06-27 21:41:03,980 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 427 selfloop transitions, 93 changer transitions 0/527 dead transitions. [2024-06-27 21:41:03,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 527 transitions, 6901 flow [2024-06-27 21:41:03,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:41:03,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:41:03,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 21:41:03,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 21:41:03,981 INFO L175 Difference]: Start difference. First operand has 383 places, 512 transitions, 5750 flow. Second operand 9 states and 171 transitions. [2024-06-27 21:41:03,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 527 transitions, 6901 flow [2024-06-27 21:41:07,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 527 transitions, 6746 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 21:41:07,222 INFO L231 Difference]: Finished difference. Result has 385 places, 514 transitions, 5866 flow [2024-06-27 21:41:07,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5595, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5866, PETRI_PLACES=385, PETRI_TRANSITIONS=514} [2024-06-27 21:41:07,223 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 342 predicate places. [2024-06-27 21:41:07,223 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 514 transitions, 5866 flow [2024-06-27 21:41:07,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:07,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:41:07,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:41:07,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 21:41:07,223 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:41:07,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:41:07,223 INFO L85 PathProgramCache]: Analyzing trace with hash -858551132, now seen corresponding path program 10 times [2024-06-27 21:41:07,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:41:07,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316303630] [2024-06-27 21:41:07,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:41:07,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:41:07,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:41:08,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:41:08,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:41:08,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316303630] [2024-06-27 21:41:08,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316303630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:41:08,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:41:08,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:41:08,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443111546] [2024-06-27 21:41:08,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:41:08,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:41:08,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:41:08,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:41:08,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:41:08,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:41:08,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 514 transitions, 5866 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:08,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:41:08,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:41:08,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:41:09,113 INFO L124 PetriNetUnfolderBase]: 2842/4758 cut-off events. [2024-06-27 21:41:09,114 INFO L125 PetriNetUnfolderBase]: For 685843/685843 co-relation queries the response was YES. [2024-06-27 21:41:09,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41761 conditions, 4758 events. 2842/4758 cut-off events. For 685843/685843 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 30812 event pairs, 528 based on Foata normal form. 2/4752 useless extension candidates. Maximal degree in co-relation 41586. Up to 4123 conditions per place. [2024-06-27 21:41:09,181 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 444 selfloop transitions, 79 changer transitions 0/530 dead transitions. [2024-06-27 21:41:09,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 530 transitions, 7029 flow [2024-06-27 21:41:09,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:41:09,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:41:09,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 21:41:09,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-27 21:41:09,182 INFO L175 Difference]: Start difference. First operand has 385 places, 514 transitions, 5866 flow. Second operand 9 states and 172 transitions. [2024-06-27 21:41:09,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 530 transitions, 7029 flow [2024-06-27 21:41:12,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 530 transitions, 6774 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-27 21:41:12,634 INFO L231 Difference]: Finished difference. Result has 387 places, 516 transitions, 5859 flow [2024-06-27 21:41:12,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5611, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5859, PETRI_PLACES=387, PETRI_TRANSITIONS=516} [2024-06-27 21:41:12,634 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 344 predicate places. [2024-06-27 21:41:12,634 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 516 transitions, 5859 flow [2024-06-27 21:41:12,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:12,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:41:12,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:41:12,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 21:41:12,635 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:41:12,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:41:12,635 INFO L85 PathProgramCache]: Analyzing trace with hash -305068642, now seen corresponding path program 11 times [2024-06-27 21:41:12,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:41:12,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379490760] [2024-06-27 21:41:12,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:41:12,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:41:12,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:41:13,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:41:13,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:41:13,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379490760] [2024-06-27 21:41:13,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379490760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:41:13,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:41:13,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:41:13,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258175152] [2024-06-27 21:41:13,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:41:13,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:41:13,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:41:13,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:41:13,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:41:13,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:41:13,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 516 transitions, 5859 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:13,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:41:13,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:41:13,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:41:14,543 INFO L124 PetriNetUnfolderBase]: 2863/4793 cut-off events. [2024-06-27 21:41:14,543 INFO L125 PetriNetUnfolderBase]: For 714477/714477 co-relation queries the response was YES. [2024-06-27 21:41:14,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42611 conditions, 4793 events. 2863/4793 cut-off events. For 714477/714477 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 31106 event pairs, 531 based on Foata normal form. 2/4787 useless extension candidates. Maximal degree in co-relation 42435. Up to 4128 conditions per place. [2024-06-27 21:41:14,612 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 427 selfloop transitions, 101 changer transitions 0/535 dead transitions. [2024-06-27 21:41:14,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 535 transitions, 7358 flow [2024-06-27 21:41:14,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:41:14,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:41:14,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 21:41:14,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-27 21:41:14,613 INFO L175 Difference]: Start difference. First operand has 387 places, 516 transitions, 5859 flow. Second operand 9 states and 173 transitions. [2024-06-27 21:41:14,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 535 transitions, 7358 flow [2024-06-27 21:41:18,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 535 transitions, 7145 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 21:41:18,642 INFO L231 Difference]: Finished difference. Result has 390 places, 520 transitions, 6025 flow [2024-06-27 21:41:18,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5646, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6025, PETRI_PLACES=390, PETRI_TRANSITIONS=520} [2024-06-27 21:41:18,643 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-27 21:41:18,643 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 520 transitions, 6025 flow [2024-06-27 21:41:18,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:18,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:41:18,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:41:18,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 21:41:18,643 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:41:18,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:41:18,644 INFO L85 PathProgramCache]: Analyzing trace with hash 866602724, now seen corresponding path program 12 times [2024-06-27 21:41:18,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:41:18,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198676108] [2024-06-27 21:41:18,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:41:18,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:41:18,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:41:19,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:41:19,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:41:19,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198676108] [2024-06-27 21:41:19,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198676108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:41:19,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:41:19,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:41:19,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623779365] [2024-06-27 21:41:19,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:41:19,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:41:19,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:41:19,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:41:19,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:41:19,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:41:19,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 520 transitions, 6025 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:19,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:41:19,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:41:19,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:41:20,637 INFO L124 PetriNetUnfolderBase]: 2871/4807 cut-off events. [2024-06-27 21:41:20,637 INFO L125 PetriNetUnfolderBase]: For 728610/728610 co-relation queries the response was YES. [2024-06-27 21:41:20,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43017 conditions, 4807 events. 2871/4807 cut-off events. For 728610/728610 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 31224 event pairs, 531 based on Foata normal form. 2/4801 useless extension candidates. Maximal degree in co-relation 42840. Up to 4140 conditions per place. [2024-06-27 21:41:20,703 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 428 selfloop transitions, 104 changer transitions 0/539 dead transitions. [2024-06-27 21:41:20,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 539 transitions, 7523 flow [2024-06-27 21:41:20,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:41:20,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:41:20,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 21:41:20,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-27 21:41:20,704 INFO L175 Difference]: Start difference. First operand has 390 places, 520 transitions, 6025 flow. Second operand 9 states and 173 transitions. [2024-06-27 21:41:20,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 539 transitions, 7523 flow [2024-06-27 21:41:24,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 539 transitions, 7317 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-27 21:41:24,377 INFO L231 Difference]: Finished difference. Result has 395 places, 524 transitions, 6210 flow [2024-06-27 21:41:24,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5819, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6210, PETRI_PLACES=395, PETRI_TRANSITIONS=524} [2024-06-27 21:41:24,378 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 352 predicate places. [2024-06-27 21:41:24,378 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 524 transitions, 6210 flow [2024-06-27 21:41:24,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:24,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:41:24,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:41:24,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 21:41:24,378 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:41:24,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:41:24,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1387163714, now seen corresponding path program 13 times [2024-06-27 21:41:24,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:41:24,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561647743] [2024-06-27 21:41:24,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:41:24,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:41:24,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:41:25,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:41:25,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:41:25,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561647743] [2024-06-27 21:41:25,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561647743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:41:25,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:41:25,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:41:25,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346291457] [2024-06-27 21:41:25,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:41:25,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:41:25,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:41:25,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:41:25,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:41:25,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:41:25,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 524 transitions, 6210 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:25,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:41:25,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:41:25,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:41:26,541 INFO L124 PetriNetUnfolderBase]: 2879/4829 cut-off events. [2024-06-27 21:41:26,541 INFO L125 PetriNetUnfolderBase]: For 742707/742707 co-relation queries the response was YES. [2024-06-27 21:41:26,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43630 conditions, 4829 events. 2879/4829 cut-off events. For 742707/742707 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 31457 event pairs, 512 based on Foata normal form. 2/4823 useless extension candidates. Maximal degree in co-relation 43450. Up to 3983 conditions per place. [2024-06-27 21:41:26,603 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 404 selfloop transitions, 136 changer transitions 0/547 dead transitions. [2024-06-27 21:41:26,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 547 transitions, 8068 flow [2024-06-27 21:41:26,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:41:26,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:41:26,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 21:41:26,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-27 21:41:26,605 INFO L175 Difference]: Start difference. First operand has 395 places, 524 transitions, 6210 flow. Second operand 9 states and 175 transitions. [2024-06-27 21:41:26,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 547 transitions, 8068 flow [2024-06-27 21:41:29,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 547 transitions, 7846 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-27 21:41:29,994 INFO L231 Difference]: Finished difference. Result has 400 places, 530 transitions, 6579 flow [2024-06-27 21:41:29,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5988, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6579, PETRI_PLACES=400, PETRI_TRANSITIONS=530} [2024-06-27 21:41:29,994 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-27 21:41:29,994 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 530 transitions, 6579 flow [2024-06-27 21:41:29,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:29,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:41:29,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:41:29,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 21:41:29,995 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:41:29,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:41:29,995 INFO L85 PathProgramCache]: Analyzing trace with hash -382738492, now seen corresponding path program 14 times [2024-06-27 21:41:29,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:41:29,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157252579] [2024-06-27 21:41:29,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:41:29,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:41:30,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:41:30,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:41:30,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:41:30,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157252579] [2024-06-27 21:41:30,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157252579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:41:30,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:41:30,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:41:30,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757611379] [2024-06-27 21:41:30,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:41:30,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:41:30,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:41:30,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:41:30,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:41:30,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:41:30,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 530 transitions, 6579 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:30,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:41:30,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:41:30,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:41:31,920 INFO L124 PetriNetUnfolderBase]: 2874/4818 cut-off events. [2024-06-27 21:41:31,920 INFO L125 PetriNetUnfolderBase]: For 739577/739577 co-relation queries the response was YES. [2024-06-27 21:41:31,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43943 conditions, 4818 events. 2874/4818 cut-off events. For 739577/739577 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 31345 event pairs, 512 based on Foata normal form. 2/4812 useless extension candidates. Maximal degree in co-relation 43760. Up to 3979 conditions per place. [2024-06-27 21:41:31,990 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 401 selfloop transitions, 138 changer transitions 0/546 dead transitions. [2024-06-27 21:41:31,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 546 transitions, 7940 flow [2024-06-27 21:41:31,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:41:31,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:41:31,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-27 21:41:31,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-27 21:41:31,992 INFO L175 Difference]: Start difference. First operand has 400 places, 530 transitions, 6579 flow. Second operand 9 states and 174 transitions. [2024-06-27 21:41:31,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 546 transitions, 7940 flow [2024-06-27 21:41:36,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 546 transitions, 7650 flow, removed 94 selfloop flow, removed 4 redundant places. [2024-06-27 21:41:36,191 INFO L231 Difference]: Finished difference. Result has 405 places, 530 transitions, 6570 flow [2024-06-27 21:41:36,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6289, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6570, PETRI_PLACES=405, PETRI_TRANSITIONS=530} [2024-06-27 21:41:36,191 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 362 predicate places. [2024-06-27 21:41:36,191 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 530 transitions, 6570 flow [2024-06-27 21:41:36,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:36,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:41:36,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:41:36,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 21:41:36,192 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:41:36,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:41:36,192 INFO L85 PathProgramCache]: Analyzing trace with hash -697657882, now seen corresponding path program 15 times [2024-06-27 21:41:36,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:41:36,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086434810] [2024-06-27 21:41:36,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:41:36,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:41:36,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:41:37,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:41:37,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:41:37,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086434810] [2024-06-27 21:41:37,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086434810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:41:37,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:41:37,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:41:37,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424253817] [2024-06-27 21:41:37,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:41:37,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:41:37,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:41:37,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:41:37,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:41:37,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:41:37,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 530 transitions, 6570 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:37,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:41:37,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:41:37,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:41:38,199 INFO L124 PetriNetUnfolderBase]: 2869/4807 cut-off events. [2024-06-27 21:41:38,199 INFO L125 PetriNetUnfolderBase]: For 725984/725984 co-relation queries the response was YES. [2024-06-27 21:41:38,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43398 conditions, 4807 events. 2869/4807 cut-off events. For 725984/725984 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 31213 event pairs, 535 based on Foata normal form. 2/4801 useless extension candidates. Maximal degree in co-relation 43213. Up to 4173 conditions per place. [2024-06-27 21:41:38,274 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 441 selfloop transitions, 95 changer transitions 0/543 dead transitions. [2024-06-27 21:41:38,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 543 transitions, 7677 flow [2024-06-27 21:41:38,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:41:38,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:41:38,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 21:41:38,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 21:41:38,275 INFO L175 Difference]: Start difference. First operand has 405 places, 530 transitions, 6570 flow. Second operand 9 states and 171 transitions. [2024-06-27 21:41:38,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 543 transitions, 7677 flow [2024-06-27 21:41:42,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 543 transitions, 7133 flow, removed 71 selfloop flow, removed 9 redundant places. [2024-06-27 21:41:42,629 INFO L231 Difference]: Finished difference. Result has 405 places, 530 transitions, 6221 flow [2024-06-27 21:41:42,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6026, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6221, PETRI_PLACES=405, PETRI_TRANSITIONS=530} [2024-06-27 21:41:42,629 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 362 predicate places. [2024-06-27 21:41:42,630 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 530 transitions, 6221 flow [2024-06-27 21:41:42,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:42,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:41:42,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:41:42,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 21:41:42,630 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:41:42,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:41:42,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1158656892, now seen corresponding path program 6 times [2024-06-27 21:41:42,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:41:42,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736368192] [2024-06-27 21:41:42,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:41:42,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:41:42,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:41:43,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:41:43,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:41:43,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736368192] [2024-06-27 21:41:43,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736368192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:41:43,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:41:43,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:41:43,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537970984] [2024-06-27 21:41:43,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:41:43,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:41:43,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:41:43,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:41:43,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:41:43,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:41:43,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 530 transitions, 6221 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:43,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:41:43,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:41:43,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:41:44,310 INFO L124 PetriNetUnfolderBase]: 2864/4806 cut-off events. [2024-06-27 21:41:44,311 INFO L125 PetriNetUnfolderBase]: For 718839/718839 co-relation queries the response was YES. [2024-06-27 21:41:44,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42288 conditions, 4806 events. 2864/4806 cut-off events. For 718839/718839 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 31259 event pairs, 528 based on Foata normal form. 2/4798 useless extension candidates. Maximal degree in co-relation 42104. Up to 4235 conditions per place. [2024-06-27 21:41:44,385 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 464 selfloop transitions, 69 changer transitions 0/540 dead transitions. [2024-06-27 21:41:44,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 540 transitions, 7313 flow [2024-06-27 21:41:44,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:41:44,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:41:44,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-27 21:41:44,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2024-06-27 21:41:44,386 INFO L175 Difference]: Start difference. First operand has 405 places, 530 transitions, 6221 flow. Second operand 7 states and 138 transitions. [2024-06-27 21:41:44,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 540 transitions, 7313 flow [2024-06-27 21:41:47,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 540 transitions, 7089 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-27 21:41:47,414 INFO L231 Difference]: Finished difference. Result has 404 places, 530 transitions, 6149 flow [2024-06-27 21:41:47,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5997, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6149, PETRI_PLACES=404, PETRI_TRANSITIONS=530} [2024-06-27 21:41:47,414 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-27 21:41:47,414 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 530 transitions, 6149 flow [2024-06-27 21:41:47,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:47,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:41:47,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:41:47,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 21:41:47,415 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:41:47,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:41:47,415 INFO L85 PathProgramCache]: Analyzing trace with hash -661120118, now seen corresponding path program 1 times [2024-06-27 21:41:47,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:41:47,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014163002] [2024-06-27 21:41:47,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:41:47,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:41:47,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:41:48,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:41:48,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:41:48,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014163002] [2024-06-27 21:41:48,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014163002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:41:48,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:41:48,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:41:48,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723509670] [2024-06-27 21:41:48,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:41:48,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:41:48,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:41:48,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:41:48,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:41:48,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:41:48,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 530 transitions, 6149 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:48,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:41:48,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:41:48,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:41:49,420 INFO L124 PetriNetUnfolderBase]: 2909/4882 cut-off events. [2024-06-27 21:41:49,420 INFO L125 PetriNetUnfolderBase]: For 776421/776421 co-relation queries the response was YES. [2024-06-27 21:41:49,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43736 conditions, 4882 events. 2909/4882 cut-off events. For 776421/776421 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 31734 event pairs, 430 based on Foata normal form. 4/4880 useless extension candidates. Maximal degree in co-relation 43551. Up to 4193 conditions per place. [2024-06-27 21:41:49,496 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 509 selfloop transitions, 45 changer transitions 0/561 dead transitions. [2024-06-27 21:41:49,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 561 transitions, 7818 flow [2024-06-27 21:41:49,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:41:49,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:41:49,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-27 21:41:49,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 21:41:49,497 INFO L175 Difference]: Start difference. First operand has 404 places, 530 transitions, 6149 flow. Second operand 9 states and 180 transitions. [2024-06-27 21:41:49,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 561 transitions, 7818 flow [2024-06-27 21:41:53,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 561 transitions, 7647 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 21:41:53,761 INFO L231 Difference]: Finished difference. Result has 408 places, 536 transitions, 6341 flow [2024-06-27 21:41:53,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5984, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6341, PETRI_PLACES=408, PETRI_TRANSITIONS=536} [2024-06-27 21:41:53,761 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 365 predicate places. [2024-06-27 21:41:53,761 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 536 transitions, 6341 flow [2024-06-27 21:41:53,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:53,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:41:53,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:41:53,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 21:41:53,762 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:41:53,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:41:53,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1119515438, now seen corresponding path program 2 times [2024-06-27 21:41:53,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:41:53,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053064591] [2024-06-27 21:41:53,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:41:53,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:41:53,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:41:54,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:41:54,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:41:54,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053064591] [2024-06-27 21:41:54,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053064591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:41:54,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:41:54,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:41:54,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900217174] [2024-06-27 21:41:54,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:41:54,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:41:54,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:41:54,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:41:54,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:41:54,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:41:54,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 536 transitions, 6341 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:54,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:41:54,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:41:54,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:41:56,060 INFO L124 PetriNetUnfolderBase]: 2925/4906 cut-off events. [2024-06-27 21:41:56,060 INFO L125 PetriNetUnfolderBase]: For 758676/758676 co-relation queries the response was YES. [2024-06-27 21:41:56,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44102 conditions, 4906 events. 2925/4906 cut-off events. For 758676/758676 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 31973 event pairs, 529 based on Foata normal form. 4/4904 useless extension candidates. Maximal degree in co-relation 43915. Up to 4335 conditions per place. [2024-06-27 21:41:56,135 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 500 selfloop transitions, 51 changer transitions 0/558 dead transitions. [2024-06-27 21:41:56,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 558 transitions, 7630 flow [2024-06-27 21:41:56,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:41:56,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:41:56,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-27 21:41:56,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-27 21:41:56,137 INFO L175 Difference]: Start difference. First operand has 408 places, 536 transitions, 6341 flow. Second operand 9 states and 176 transitions. [2024-06-27 21:41:56,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 558 transitions, 7630 flow [2024-06-27 21:42:00,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 558 transitions, 7429 flow, removed 76 selfloop flow, removed 5 redundant places. [2024-06-27 21:42:00,496 INFO L231 Difference]: Finished difference. Result has 412 places, 539 transitions, 6386 flow [2024-06-27 21:42:00,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6140, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6386, PETRI_PLACES=412, PETRI_TRANSITIONS=539} [2024-06-27 21:42:00,496 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-27 21:42:00,496 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 539 transitions, 6386 flow [2024-06-27 21:42:00,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:00,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:42:00,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:42:00,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 21:42:00,497 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:42:00,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:42:00,497 INFO L85 PathProgramCache]: Analyzing trace with hash -659246168, now seen corresponding path program 3 times [2024-06-27 21:42:00,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:42:00,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407381279] [2024-06-27 21:42:00,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:42:00,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:42:00,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:42:01,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:42:01,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:42:01,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407381279] [2024-06-27 21:42:01,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407381279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:42:01,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:42:01,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:42:01,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888431372] [2024-06-27 21:42:01,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:42:01,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:42:01,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:42:01,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:42:01,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:42:01,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:42:01,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 539 transitions, 6386 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:01,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:42:01,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:42:01,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:42:02,634 INFO L124 PetriNetUnfolderBase]: 2970/4977 cut-off events. [2024-06-27 21:42:02,634 INFO L125 PetriNetUnfolderBase]: For 804034/804034 co-relation queries the response was YES. [2024-06-27 21:42:02,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45516 conditions, 4977 events. 2970/4977 cut-off events. For 804034/804034 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 32426 event pairs, 527 based on Foata normal form. 4/4975 useless extension candidates. Maximal degree in co-relation 45327. Up to 4341 conditions per place. [2024-06-27 21:42:02,709 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 508 selfloop transitions, 51 changer transitions 0/566 dead transitions. [2024-06-27 21:42:02,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 566 transitions, 8073 flow [2024-06-27 21:42:02,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:42:02,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:42:02,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 21:42:02,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-27 21:42:02,710 INFO L175 Difference]: Start difference. First operand has 412 places, 539 transitions, 6386 flow. Second operand 9 states and 178 transitions. [2024-06-27 21:42:02,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 566 transitions, 8073 flow [2024-06-27 21:42:07,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 566 transitions, 7849 flow, removed 63 selfloop flow, removed 7 redundant places. [2024-06-27 21:42:07,528 INFO L231 Difference]: Finished difference. Result has 415 places, 545 transitions, 6556 flow [2024-06-27 21:42:07,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6162, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6556, PETRI_PLACES=415, PETRI_TRANSITIONS=545} [2024-06-27 21:42:07,528 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-27 21:42:07,528 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 545 transitions, 6556 flow [2024-06-27 21:42:07,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:07,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:42:07,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:42:07,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 21:42:07,529 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:42:07,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:42:07,529 INFO L85 PathProgramCache]: Analyzing trace with hash -572400536, now seen corresponding path program 1 times [2024-06-27 21:42:07,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:42:07,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932088576] [2024-06-27 21:42:07,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:42:07,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:42:07,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:42:08,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:42:08,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:42:08,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932088576] [2024-06-27 21:42:08,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932088576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:42:08,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:42:08,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:42:08,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264829313] [2024-06-27 21:42:08,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:42:08,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:42:08,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:42:08,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:42:08,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:42:08,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:42:08,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 545 transitions, 6556 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:08,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:42:08,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:42:08,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:42:10,078 INFO L124 PetriNetUnfolderBase]: 3026/5067 cut-off events. [2024-06-27 21:42:10,078 INFO L125 PetriNetUnfolderBase]: For 923879/923879 co-relation queries the response was YES. [2024-06-27 21:42:10,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46948 conditions, 5067 events. 3026/5067 cut-off events. For 923879/923879 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 33150 event pairs, 540 based on Foata normal form. 16/5077 useless extension candidates. Maximal degree in co-relation 46757. Up to 4412 conditions per place. [2024-06-27 21:42:10,156 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 505 selfloop transitions, 58 changer transitions 0/570 dead transitions. [2024-06-27 21:42:10,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 570 transitions, 7925 flow [2024-06-27 21:42:10,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:42:10,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:42:10,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-27 21:42:10,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 21:42:10,157 INFO L175 Difference]: Start difference. First operand has 415 places, 545 transitions, 6556 flow. Second operand 11 states and 210 transitions. [2024-06-27 21:42:10,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 570 transitions, 7925 flow [2024-06-27 21:42:14,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 570 transitions, 7702 flow, removed 85 selfloop flow, removed 5 redundant places. [2024-06-27 21:42:14,710 INFO L231 Difference]: Finished difference. Result has 421 places, 547 transitions, 6584 flow [2024-06-27 21:42:14,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6333, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6584, PETRI_PLACES=421, PETRI_TRANSITIONS=547} [2024-06-27 21:42:14,711 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 378 predicate places. [2024-06-27 21:42:14,711 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 547 transitions, 6584 flow [2024-06-27 21:42:14,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:14,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:42:14,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:42:14,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 21:42:14,711 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:42:14,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:42:14,711 INFO L85 PathProgramCache]: Analyzing trace with hash -254199866, now seen corresponding path program 4 times [2024-06-27 21:42:14,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:42:14,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674214596] [2024-06-27 21:42:14,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:42:14,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:42:14,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:42:15,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:42:15,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:42:15,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674214596] [2024-06-27 21:42:15,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674214596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:42:15,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:42:15,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:42:15,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125470618] [2024-06-27 21:42:15,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:42:15,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:42:15,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:42:15,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:42:15,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:42:15,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:42:15,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 547 transitions, 6584 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:15,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:42:15,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:42:15,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:42:16,912 INFO L124 PetriNetUnfolderBase]: 3042/5085 cut-off events. [2024-06-27 21:42:16,912 INFO L125 PetriNetUnfolderBase]: For 850078/850078 co-relation queries the response was YES. [2024-06-27 21:42:16,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47149 conditions, 5085 events. 3042/5085 cut-off events. For 850078/850078 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 33218 event pairs, 538 based on Foata normal form. 4/5083 useless extension candidates. Maximal degree in co-relation 46956. Up to 4518 conditions per place. [2024-06-27 21:42:16,992 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 506 selfloop transitions, 53 changer transitions 0/566 dead transitions. [2024-06-27 21:42:16,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 566 transitions, 7895 flow [2024-06-27 21:42:16,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:42:16,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:42:16,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 21:42:16,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-27 21:42:16,993 INFO L175 Difference]: Start difference. First operand has 421 places, 547 transitions, 6584 flow. Second operand 9 states and 175 transitions. [2024-06-27 21:42:16,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 566 transitions, 7895 flow [2024-06-27 21:42:21,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 566 transitions, 7718 flow, removed 34 selfloop flow, removed 9 redundant places. [2024-06-27 21:42:21,426 INFO L231 Difference]: Finished difference. Result has 421 places, 550 transitions, 6673 flow [2024-06-27 21:42:21,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6407, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6673, PETRI_PLACES=421, PETRI_TRANSITIONS=550} [2024-06-27 21:42:21,426 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 378 predicate places. [2024-06-27 21:42:21,427 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 550 transitions, 6673 flow [2024-06-27 21:42:21,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:21,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:42:21,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:42:21,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 21:42:21,427 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:42:21,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:42:21,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1424397530, now seen corresponding path program 5 times [2024-06-27 21:42:21,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:42:21,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013152553] [2024-06-27 21:42:21,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:42:21,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:42:21,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:42:22,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:42:22,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:42:22,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013152553] [2024-06-27 21:42:22,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013152553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:42:22,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:42:22,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:42:22,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277065675] [2024-06-27 21:42:22,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:42:22,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:42:22,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:42:22,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:42:22,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:42:22,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:42:22,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 550 transitions, 6673 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:22,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:42:22,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:42:22,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:42:23,692 INFO L124 PetriNetUnfolderBase]: 3058/5113 cut-off events. [2024-06-27 21:42:23,692 INFO L125 PetriNetUnfolderBase]: For 851888/851888 co-relation queries the response was YES. [2024-06-27 21:42:23,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47206 conditions, 5113 events. 3058/5113 cut-off events. For 851888/851888 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 33400 event pairs, 550 based on Foata normal form. 4/5111 useless extension candidates. Maximal degree in co-relation 47012. Up to 4476 conditions per place. [2024-06-27 21:42:23,771 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 491 selfloop transitions, 71 changer transitions 0/569 dead transitions. [2024-06-27 21:42:23,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 569 transitions, 7996 flow [2024-06-27 21:42:23,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:42:23,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:42:23,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-27 21:42:23,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-27 21:42:23,772 INFO L175 Difference]: Start difference. First operand has 421 places, 550 transitions, 6673 flow. Second operand 9 states and 176 transitions. [2024-06-27 21:42:23,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 569 transitions, 7996 flow [2024-06-27 21:42:27,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 569 transitions, 7752 flow, removed 71 selfloop flow, removed 7 redundant places. [2024-06-27 21:42:27,585 INFO L231 Difference]: Finished difference. Result has 423 places, 553 transitions, 6737 flow [2024-06-27 21:42:27,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6429, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6737, PETRI_PLACES=423, PETRI_TRANSITIONS=553} [2024-06-27 21:42:27,585 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 380 predicate places. [2024-06-27 21:42:27,585 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 553 transitions, 6737 flow [2024-06-27 21:42:27,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:27,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:42:27,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:42:27,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 21:42:27,586 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:42:27,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:42:27,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1424545400, now seen corresponding path program 6 times [2024-06-27 21:42:27,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:42:27,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409881362] [2024-06-27 21:42:27,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:42:27,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:42:27,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:42:28,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:42:28,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:42:28,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409881362] [2024-06-27 21:42:28,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409881362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:42:28,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:42:28,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:42:28,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166026709] [2024-06-27 21:42:28,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:42:28,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:42:28,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:42:28,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:42:28,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:42:28,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:42:28,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 553 transitions, 6737 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:28,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:42:28,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:42:28,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:42:29,843 INFO L124 PetriNetUnfolderBase]: 3103/5184 cut-off events. [2024-06-27 21:42:29,843 INFO L125 PetriNetUnfolderBase]: For 894215/894215 co-relation queries the response was YES. [2024-06-27 21:42:29,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48878 conditions, 5184 events. 3103/5184 cut-off events. For 894215/894215 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 33922 event pairs, 554 based on Foata normal form. 4/5182 useless extension candidates. Maximal degree in co-relation 48683. Up to 4468 conditions per place. [2024-06-27 21:42:29,923 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 496 selfloop transitions, 74 changer transitions 0/577 dead transitions. [2024-06-27 21:42:29,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 577 transitions, 8482 flow [2024-06-27 21:42:29,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:42:29,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:42:29,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 21:42:29,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-27 21:42:29,924 INFO L175 Difference]: Start difference. First operand has 423 places, 553 transitions, 6737 flow. Second operand 9 states and 178 transitions. [2024-06-27 21:42:29,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 577 transitions, 8482 flow [2024-06-27 21:42:34,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 577 transitions, 8196 flow, removed 74 selfloop flow, removed 7 redundant places. [2024-06-27 21:42:34,428 INFO L231 Difference]: Finished difference. Result has 426 places, 559 transitions, 6931 flow [2024-06-27 21:42:34,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6451, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6931, PETRI_PLACES=426, PETRI_TRANSITIONS=559} [2024-06-27 21:42:34,428 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-27 21:42:34,429 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 559 transitions, 6931 flow [2024-06-27 21:42:34,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:34,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:42:34,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:42:34,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 21:42:34,429 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:42:34,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:42:34,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1424391578, now seen corresponding path program 2 times [2024-06-27 21:42:34,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:42:34,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203549021] [2024-06-27 21:42:34,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:42:34,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:42:34,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:42:35,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:42:35,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:42:35,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203549021] [2024-06-27 21:42:35,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203549021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:42:35,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:42:35,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:42:35,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077393020] [2024-06-27 21:42:35,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:42:35,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:42:35,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:42:35,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:42:35,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:42:35,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:42:35,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 559 transitions, 6931 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:35,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:42:35,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:42:35,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:42:37,087 INFO L124 PetriNetUnfolderBase]: 3159/5270 cut-off events. [2024-06-27 21:42:37,087 INFO L125 PetriNetUnfolderBase]: For 1030676/1030676 co-relation queries the response was YES. [2024-06-27 21:42:37,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50408 conditions, 5270 events. 3159/5270 cut-off events. For 1030676/1030676 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 34583 event pairs, 569 based on Foata normal form. 16/5280 useless extension candidates. Maximal degree in co-relation 50211. Up to 4619 conditions per place. [2024-06-27 21:42:37,171 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 519 selfloop transitions, 55 changer transitions 0/581 dead transitions. [2024-06-27 21:42:37,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 581 transitions, 8328 flow [2024-06-27 21:42:37,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:42:37,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:42:37,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-27 21:42:37,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-06-27 21:42:37,172 INFO L175 Difference]: Start difference. First operand has 426 places, 559 transitions, 6931 flow. Second operand 10 states and 194 transitions. [2024-06-27 21:42:37,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 581 transitions, 8328 flow [2024-06-27 21:42:41,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 581 transitions, 8052 flow, removed 99 selfloop flow, removed 5 redundant places. [2024-06-27 21:42:41,365 INFO L231 Difference]: Finished difference. Result has 431 places, 561 transitions, 6916 flow [2024-06-27 21:42:41,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6655, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6916, PETRI_PLACES=431, PETRI_TRANSITIONS=561} [2024-06-27 21:42:41,365 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 388 predicate places. [2024-06-27 21:42:41,365 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 561 transitions, 6916 flow [2024-06-27 21:42:41,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:41,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:42:41,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:42:41,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 21:42:41,365 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:42:41,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:42:41,366 INFO L85 PathProgramCache]: Analyzing trace with hash -254193914, now seen corresponding path program 3 times [2024-06-27 21:42:41,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:42:41,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783041022] [2024-06-27 21:42:41,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:42:41,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:42:41,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:42:42,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:42:42,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:42:42,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783041022] [2024-06-27 21:42:42,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783041022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:42:42,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:42:42,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:42:42,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937030540] [2024-06-27 21:42:42,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:42:42,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:42:42,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:42:42,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:42:42,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:42:42,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:42:42,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 561 transitions, 6916 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:42,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:42:42,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:42:42,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:42:43,902 INFO L124 PetriNetUnfolderBase]: 3215/5356 cut-off events. [2024-06-27 21:42:43,902 INFO L125 PetriNetUnfolderBase]: For 1057984/1057984 co-relation queries the response was YES. [2024-06-27 21:42:43,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51647 conditions, 5356 events. 3215/5356 cut-off events. For 1057984/1057984 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 35176 event pairs, 577 based on Foata normal form. 16/5366 useless extension candidates. Maximal degree in co-relation 51448. Up to 4707 conditions per place. [2024-06-27 21:42:43,986 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 518 selfloop transitions, 58 changer transitions 0/583 dead transitions. [2024-06-27 21:42:43,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 583 transitions, 8321 flow [2024-06-27 21:42:43,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:42:43,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:42:43,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-27 21:42:43,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 21:42:43,987 INFO L175 Difference]: Start difference. First operand has 431 places, 561 transitions, 6916 flow. Second operand 10 states and 195 transitions. [2024-06-27 21:42:43,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 583 transitions, 8321 flow [2024-06-27 21:42:48,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 583 transitions, 8134 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-27 21:42:48,545 INFO L231 Difference]: Finished difference. Result has 433 places, 563 transitions, 7000 flow [2024-06-27 21:42:48,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6729, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7000, PETRI_PLACES=433, PETRI_TRANSITIONS=563} [2024-06-27 21:42:48,546 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 390 predicate places. [2024-06-27 21:42:48,546 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 563 transitions, 7000 flow [2024-06-27 21:42:48,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:48,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:42:48,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:42:48,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 21:42:48,546 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:42:48,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:42:48,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1217738138, now seen corresponding path program 4 times [2024-06-27 21:42:48,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:42:48,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606745591] [2024-06-27 21:42:48,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:42:48,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:42:48,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:42:49,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:42:49,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:42:49,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606745591] [2024-06-27 21:42:49,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606745591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:42:49,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:42:49,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:42:49,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133235590] [2024-06-27 21:42:49,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:42:49,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:42:49,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:42:49,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:42:49,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:42:49,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:42:49,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 563 transitions, 7000 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:49,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:42:49,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:42:49,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:42:51,075 INFO L124 PetriNetUnfolderBase]: 3271/5456 cut-off events. [2024-06-27 21:42:51,075 INFO L125 PetriNetUnfolderBase]: For 1079287/1079287 co-relation queries the response was YES. [2024-06-27 21:42:51,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52754 conditions, 5456 events. 3271/5456 cut-off events. For 1079287/1079287 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 35975 event pairs, 591 based on Foata normal form. 16/5466 useless extension candidates. Maximal degree in co-relation 52554. Up to 4725 conditions per place. [2024-06-27 21:42:51,160 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 480 selfloop transitions, 98 changer transitions 0/585 dead transitions. [2024-06-27 21:42:51,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 585 transitions, 8413 flow [2024-06-27 21:42:51,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:42:51,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:42:51,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 21:42:51,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-27 21:42:51,162 INFO L175 Difference]: Start difference. First operand has 433 places, 563 transitions, 7000 flow. Second operand 10 states and 196 transitions. [2024-06-27 21:42:51,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 585 transitions, 8413 flow [2024-06-27 21:42:56,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 585 transitions, 8216 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-27 21:42:56,261 INFO L231 Difference]: Finished difference. Result has 435 places, 565 transitions, 7155 flow [2024-06-27 21:42:56,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6803, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7155, PETRI_PLACES=435, PETRI_TRANSITIONS=565} [2024-06-27 21:42:56,261 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-27 21:42:56,261 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 565 transitions, 7155 flow [2024-06-27 21:42:56,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:56,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:42:56,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:42:56,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 21:42:56,262 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:42:56,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:42:56,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1217471228, now seen corresponding path program 5 times [2024-06-27 21:42:56,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:42:56,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069634963] [2024-06-27 21:42:56,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:42:56,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:42:56,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:42:57,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:42:57,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:42:57,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069634963] [2024-06-27 21:42:57,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069634963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:42:57,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:42:57,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:42:57,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015492820] [2024-06-27 21:42:57,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:42:57,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:42:57,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:42:57,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:42:57,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:42:57,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:42:57,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 565 transitions, 7155 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:57,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:42:57,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:42:57,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:42:58,722 INFO L124 PetriNetUnfolderBase]: 3431/5706 cut-off events. [2024-06-27 21:42:58,722 INFO L125 PetriNetUnfolderBase]: For 1064181/1064181 co-relation queries the response was YES. [2024-06-27 21:42:58,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55103 conditions, 5706 events. 3431/5706 cut-off events. For 1064181/1064181 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 37556 event pairs, 611 based on Foata normal form. 12/5712 useless extension candidates. Maximal degree in co-relation 54902. Up to 4729 conditions per place. [2024-06-27 21:42:58,812 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 481 selfloop transitions, 108 changer transitions 0/596 dead transitions. [2024-06-27 21:42:58,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 596 transitions, 8814 flow [2024-06-27 21:42:58,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:42:58,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:42:58,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-27 21:42:58,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-06-27 21:42:58,813 INFO L175 Difference]: Start difference. First operand has 435 places, 565 transitions, 7155 flow. Second operand 10 states and 198 transitions. [2024-06-27 21:42:58,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 596 transitions, 8814 flow [2024-06-27 21:43:03,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 596 transitions, 8524 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-06-27 21:43:03,034 INFO L231 Difference]: Finished difference. Result has 438 places, 573 transitions, 7446 flow [2024-06-27 21:43:03,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6865, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7446, PETRI_PLACES=438, PETRI_TRANSITIONS=573} [2024-06-27 21:43:03,034 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-27 21:43:03,034 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 573 transitions, 7446 flow [2024-06-27 21:43:03,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:03,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:43:03,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:43:03,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 21:43:03,035 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:43:03,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:43:03,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1466114954, now seen corresponding path program 7 times [2024-06-27 21:43:03,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:43:03,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447316137] [2024-06-27 21:43:03,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:43:03,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:43:03,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:43:03,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:43:03,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:43:03,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447316137] [2024-06-27 21:43:03,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447316137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:43:03,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:43:03,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:43:03,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305233757] [2024-06-27 21:43:03,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:43:03,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:43:03,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:43:03,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:43:03,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:43:04,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:43:04,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 573 transitions, 7446 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:04,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:43:04,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:43:04,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:43:05,371 INFO L124 PetriNetUnfolderBase]: 3437/5711 cut-off events. [2024-06-27 21:43:05,371 INFO L125 PetriNetUnfolderBase]: For 991089/991089 co-relation queries the response was YES. [2024-06-27 21:43:05,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54818 conditions, 5711 events. 3437/5711 cut-off events. For 991089/991089 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 37744 event pairs, 630 based on Foata normal form. 4/5707 useless extension candidates. Maximal degree in co-relation 54615. Up to 4955 conditions per place. [2024-06-27 21:43:05,467 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 507 selfloop transitions, 84 changer transitions 0/598 dead transitions. [2024-06-27 21:43:05,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 598 transitions, 9353 flow [2024-06-27 21:43:05,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:43:05,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:43:05,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-27 21:43:05,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-27 21:43:05,468 INFO L175 Difference]: Start difference. First operand has 438 places, 573 transitions, 7446 flow. Second operand 9 states and 177 transitions. [2024-06-27 21:43:05,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 598 transitions, 9353 flow [2024-06-27 21:43:10,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 598 transitions, 9028 flow, removed 66 selfloop flow, removed 7 redundant places. [2024-06-27 21:43:10,670 INFO L231 Difference]: Finished difference. Result has 441 places, 581 transitions, 7695 flow [2024-06-27 21:43:10,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7121, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7695, PETRI_PLACES=441, PETRI_TRANSITIONS=581} [2024-06-27 21:43:10,670 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 398 predicate places. [2024-06-27 21:43:10,671 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 581 transitions, 7695 flow [2024-06-27 21:43:10,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:10,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:43:10,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:43:10,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 21:43:10,671 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:43:10,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:43:10,672 INFO L85 PathProgramCache]: Analyzing trace with hash -858809114, now seen corresponding path program 6 times [2024-06-27 21:43:10,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:43:10,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672035354] [2024-06-27 21:43:10,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:43:10,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:43:10,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:43:11,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:43:11,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:43:11,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672035354] [2024-06-27 21:43:11,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672035354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:43:11,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:43:11,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:43:11,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100356332] [2024-06-27 21:43:11,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:43:11,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:43:11,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:43:11,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:43:11,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:43:11,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:43:11,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 581 transitions, 7695 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:11,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:43:11,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:43:11,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:43:13,313 INFO L124 PetriNetUnfolderBase]: 3493/5801 cut-off events. [2024-06-27 21:43:13,313 INFO L125 PetriNetUnfolderBase]: For 1124815/1124815 co-relation queries the response was YES. [2024-06-27 21:43:13,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55855 conditions, 5801 events. 3493/5801 cut-off events. For 1124815/1124815 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 38445 event pairs, 663 based on Foata normal form. 16/5807 useless extension candidates. Maximal degree in co-relation 55650. Up to 4984 conditions per place. [2024-06-27 21:43:13,408 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 479 selfloop transitions, 114 changer transitions 0/600 dead transitions. [2024-06-27 21:43:13,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 600 transitions, 9140 flow [2024-06-27 21:43:13,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:43:13,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:43:13,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-27 21:43:13,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46904761904761905 [2024-06-27 21:43:13,409 INFO L175 Difference]: Start difference. First operand has 441 places, 581 transitions, 7695 flow. Second operand 10 states and 197 transitions. [2024-06-27 21:43:13,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 600 transitions, 9140 flow [2024-06-27 21:43:18,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 600 transitions, 8842 flow, removed 113 selfloop flow, removed 4 redundant places. [2024-06-27 21:43:18,929 INFO L231 Difference]: Finished difference. Result has 447 places, 583 transitions, 7793 flow [2024-06-27 21:43:18,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7397, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7793, PETRI_PLACES=447, PETRI_TRANSITIONS=583} [2024-06-27 21:43:18,930 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 404 predicate places. [2024-06-27 21:43:18,930 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 583 transitions, 7793 flow [2024-06-27 21:43:18,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:18,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:43:18,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:43:18,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 21:43:18,931 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:43:18,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:43:18,931 INFO L85 PathProgramCache]: Analyzing trace with hash -858542204, now seen corresponding path program 7 times [2024-06-27 21:43:18,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:43:18,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461166327] [2024-06-27 21:43:18,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:43:18,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:43:18,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:43:19,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:43:19,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:43:19,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461166327] [2024-06-27 21:43:19,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461166327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:43:19,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:43:19,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:43:19,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404709788] [2024-06-27 21:43:19,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:43:19,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:43:19,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:43:19,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:43:19,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:43:20,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:43:20,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 583 transitions, 7793 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:20,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:43:20,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:43:20,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:43:21,740 INFO L124 PetriNetUnfolderBase]: 3573/5939 cut-off events. [2024-06-27 21:43:21,740 INFO L125 PetriNetUnfolderBase]: For 1109294/1109294 co-relation queries the response was YES. [2024-06-27 21:43:21,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57250 conditions, 5939 events. 3573/5939 cut-off events. For 1109294/1109294 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 39544 event pairs, 675 based on Foata normal form. 12/5941 useless extension candidates. Maximal degree in co-relation 57043. Up to 4988 conditions per place. [2024-06-27 21:43:21,833 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 480 selfloop transitions, 120 changer transitions 0/607 dead transitions. [2024-06-27 21:43:21,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 607 transitions, 9346 flow [2024-06-27 21:43:21,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:43:21,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:43:21,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-27 21:43:21,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738095238095238 [2024-06-27 21:43:21,834 INFO L175 Difference]: Start difference. First operand has 447 places, 583 transitions, 7793 flow. Second operand 10 states and 199 transitions. [2024-06-27 21:43:21,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 607 transitions, 9346 flow [2024-06-27 21:43:27,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 607 transitions, 9012 flow, removed 55 selfloop flow, removed 8 redundant places. [2024-06-27 21:43:27,299 INFO L231 Difference]: Finished difference. Result has 450 places, 587 transitions, 7930 flow [2024-06-27 21:43:27,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7459, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7930, PETRI_PLACES=450, PETRI_TRANSITIONS=587} [2024-06-27 21:43:27,300 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 407 predicate places. [2024-06-27 21:43:27,300 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 587 transitions, 7930 flow [2024-06-27 21:43:27,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:27,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:43:27,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:43:27,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 21:43:27,301 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:43:27,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:43:27,301 INFO L85 PathProgramCache]: Analyzing trace with hash -937923932, now seen corresponding path program 8 times [2024-06-27 21:43:27,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:43:27,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980516830] [2024-06-27 21:43:27,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:43:27,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:43:27,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:43:28,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:43:28,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:43:28,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980516830] [2024-06-27 21:43:28,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980516830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:43:28,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:43:28,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:43:28,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150576330] [2024-06-27 21:43:28,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:43:28,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:43:28,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:43:28,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:43:28,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:43:28,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:43:28,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 587 transitions, 7930 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:28,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:43:28,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:43:28,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:43:30,285 INFO L124 PetriNetUnfolderBase]: 3745/6213 cut-off events. [2024-06-27 21:43:30,285 INFO L125 PetriNetUnfolderBase]: For 1297634/1297634 co-relation queries the response was YES. [2024-06-27 21:43:30,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63166 conditions, 6213 events. 3745/6213 cut-off events. For 1297634/1297634 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 41557 event pairs, 721 based on Foata normal form. 12/6215 useless extension candidates. Maximal degree in co-relation 62957. Up to 5220 conditions per place. [2024-06-27 21:43:30,389 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 467 selfloop transitions, 140 changer transitions 0/614 dead transitions. [2024-06-27 21:43:30,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 614 transitions, 9939 flow [2024-06-27 21:43:30,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:43:30,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:43:30,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-27 21:43:30,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 21:43:30,390 INFO L175 Difference]: Start difference. First operand has 450 places, 587 transitions, 7930 flow. Second operand 10 states and 200 transitions. [2024-06-27 21:43:30,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 614 transitions, 9939 flow [2024-06-27 21:43:36,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 614 transitions, 9586 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-06-27 21:43:36,689 INFO L231 Difference]: Finished difference. Result has 454 places, 593 transitions, 8258 flow [2024-06-27 21:43:36,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7577, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8258, PETRI_PLACES=454, PETRI_TRANSITIONS=593} [2024-06-27 21:43:36,689 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 411 predicate places. [2024-06-27 21:43:36,689 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 593 transitions, 8258 flow [2024-06-27 21:43:36,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:36,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:43:36,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:43:36,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 21:43:36,690 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:43:36,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:43:36,690 INFO L85 PathProgramCache]: Analyzing trace with hash -689762554, now seen corresponding path program 9 times [2024-06-27 21:43:36,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:43:36,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650715995] [2024-06-27 21:43:36,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:43:36,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:43:36,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:43:37,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:43:37,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:43:37,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650715995] [2024-06-27 21:43:37,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650715995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:43:37,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:43:37,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:43:37,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898696904] [2024-06-27 21:43:37,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:43:37,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:43:37,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:43:37,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:43:37,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:43:37,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:43:37,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 593 transitions, 8258 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:37,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:43:37,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:43:37,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:43:39,569 INFO L124 PetriNetUnfolderBase]: 3877/6419 cut-off events. [2024-06-27 21:43:39,570 INFO L125 PetriNetUnfolderBase]: For 1492430/1492430 co-relation queries the response was YES. [2024-06-27 21:43:39,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68872 conditions, 6419 events. 3877/6419 cut-off events. For 1492430/1492430 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 43033 event pairs, 757 based on Foata normal form. 12/6421 useless extension candidates. Maximal degree in co-relation 68661. Up to 5422 conditions per place. [2024-06-27 21:43:39,679 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 433 selfloop transitions, 178 changer transitions 0/618 dead transitions. [2024-06-27 21:43:39,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 618 transitions, 10241 flow [2024-06-27 21:43:39,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:43:39,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:43:39,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-27 21:43:39,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2024-06-27 21:43:39,680 INFO L175 Difference]: Start difference. First operand has 454 places, 593 transitions, 8258 flow. Second operand 10 states and 201 transitions. [2024-06-27 21:43:39,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 618 transitions, 10241 flow [2024-06-27 21:43:46,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 618 transitions, 9922 flow, removed 70 selfloop flow, removed 6 redundant places. [2024-06-27 21:43:46,941 INFO L231 Difference]: Finished difference. Result has 458 places, 597 transitions, 8644 flow [2024-06-27 21:43:46,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7939, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8644, PETRI_PLACES=458, PETRI_TRANSITIONS=597} [2024-06-27 21:43:46,941 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 415 predicate places. [2024-06-27 21:43:46,941 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 597 transitions, 8644 flow [2024-06-27 21:43:46,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:46,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:43:46,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:43:46,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 21:43:46,941 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:43:46,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:43:46,942 INFO L85 PathProgramCache]: Analyzing trace with hash -46016136, now seen corresponding path program 10 times [2024-06-27 21:43:46,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:43:46,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360550507] [2024-06-27 21:43:46,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:43:46,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:43:46,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:43:47,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:43:47,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:43:47,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360550507] [2024-06-27 21:43:47,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360550507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:43:47,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:43:47,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:43:47,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978707468] [2024-06-27 21:43:47,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:43:47,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:43:47,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:43:47,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:43:47,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:43:48,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:43:48,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 597 transitions, 8644 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:48,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:43:48,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:43:48,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:43:49,990 INFO L124 PetriNetUnfolderBase]: 3841/6371 cut-off events. [2024-06-27 21:43:49,990 INFO L125 PetriNetUnfolderBase]: For 1387197/1387197 co-relation queries the response was YES. [2024-06-27 21:43:50,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65595 conditions, 6371 events. 3841/6371 cut-off events. For 1387197/1387197 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 42822 event pairs, 755 based on Foata normal form. 16/6377 useless extension candidates. Maximal degree in co-relation 65382. Up to 5532 conditions per place. [2024-06-27 21:43:50,088 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 473 selfloop transitions, 134 changer transitions 0/614 dead transitions. [2024-06-27 21:43:50,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 614 transitions, 9959 flow [2024-06-27 21:43:50,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:43:50,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:43:50,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-27 21:43:50,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46904761904761905 [2024-06-27 21:43:50,089 INFO L175 Difference]: Start difference. First operand has 458 places, 597 transitions, 8644 flow. Second operand 10 states and 197 transitions. [2024-06-27 21:43:50,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 614 transitions, 9959 flow [2024-06-27 21:43:57,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 614 transitions, 9487 flow, removed 123 selfloop flow, removed 6 redundant places. [2024-06-27 21:43:57,300 INFO L231 Difference]: Finished difference. Result has 462 places, 597 transitions, 8446 flow [2024-06-27 21:43:57,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8172, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8446, PETRI_PLACES=462, PETRI_TRANSITIONS=597} [2024-06-27 21:43:57,301 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 419 predicate places. [2024-06-27 21:43:57,301 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 597 transitions, 8446 flow [2024-06-27 21:43:57,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:57,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:43:57,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:43:57,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 21:43:57,302 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:43:57,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:43:57,302 INFO L85 PathProgramCache]: Analyzing trace with hash -690029464, now seen corresponding path program 11 times [2024-06-27 21:43:57,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:43:57,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336968949] [2024-06-27 21:43:57,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:43:57,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:43:57,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:43:58,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:43:58,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:43:58,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336968949] [2024-06-27 21:43:58,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336968949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:43:58,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:43:58,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:43:58,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068835326] [2024-06-27 21:43:58,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:43:58,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:43:58,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:43:58,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:43:58,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:43:58,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:43:58,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 597 transitions, 8446 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:58,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:43:58,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:43:58,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:44:00,244 INFO L124 PetriNetUnfolderBase]: 3805/6317 cut-off events. [2024-06-27 21:44:00,244 INFO L125 PetriNetUnfolderBase]: For 1214543/1214543 co-relation queries the response was YES. [2024-06-27 21:44:00,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61201 conditions, 6317 events. 3805/6317 cut-off events. For 1214543/1214543 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 42496 event pairs, 739 based on Foata normal form. 16/6323 useless extension candidates. Maximal degree in co-relation 60986. Up to 5414 conditions per place. [2024-06-27 21:44:00,350 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 433 selfloop transitions, 174 changer transitions 0/614 dead transitions. [2024-06-27 21:44:00,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 614 transitions, 9761 flow [2024-06-27 21:44:00,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:44:00,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:44:00,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-27 21:44:00,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46904761904761905 [2024-06-27 21:44:00,351 INFO L175 Difference]: Start difference. First operand has 462 places, 597 transitions, 8446 flow. Second operand 10 states and 197 transitions. [2024-06-27 21:44:00,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 614 transitions, 9761 flow [2024-06-27 21:44:06,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 614 transitions, 9383 flow, removed 57 selfloop flow, removed 8 redundant places. [2024-06-27 21:44:06,494 INFO L231 Difference]: Finished difference. Result has 464 places, 597 transitions, 8422 flow [2024-06-27 21:44:06,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8068, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8422, PETRI_PLACES=464, PETRI_TRANSITIONS=597} [2024-06-27 21:44:06,494 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 421 predicate places. [2024-06-27 21:44:06,495 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 597 transitions, 8422 flow [2024-06-27 21:44:06,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:44:06,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:44:06,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:44:06,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 21:44:06,495 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:44:06,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:44:06,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1387172642, now seen corresponding path program 12 times [2024-06-27 21:44:06,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:44:06,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409592036] [2024-06-27 21:44:06,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:44:06,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:44:06,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:44:07,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:44:07,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:44:07,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409592036] [2024-06-27 21:44:07,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409592036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:44:07,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:44:07,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:44:07,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351093615] [2024-06-27 21:44:07,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:44:07,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:44:07,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:44:07,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:44:07,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:44:07,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:44:07,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 597 transitions, 8422 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:44:07,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:44:07,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:44:07,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:44:09,191 INFO L124 PetriNetUnfolderBase]: 3832/6368 cut-off events. [2024-06-27 21:44:09,191 INFO L125 PetriNetUnfolderBase]: For 1160023/1160023 co-relation queries the response was YES. [2024-06-27 21:44:09,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61163 conditions, 6368 events. 3832/6368 cut-off events. For 1160023/1160023 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 42820 event pairs, 710 based on Foata normal form. 12/6370 useless extension candidates. Maximal degree in co-relation 60947. Up to 4631 conditions per place. [2024-06-27 21:44:09,297 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 401 selfloop transitions, 212 changer transitions 0/620 dead transitions. [2024-06-27 21:44:09,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 620 transitions, 9971 flow [2024-06-27 21:44:09,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:44:09,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:44:09,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-27 21:44:09,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 21:44:09,298 INFO L175 Difference]: Start difference. First operand has 464 places, 597 transitions, 8422 flow. Second operand 10 states and 200 transitions. [2024-06-27 21:44:09,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 620 transitions, 9971 flow [2024-06-27 21:44:17,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 620 transitions, 9613 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-27 21:44:17,156 INFO L231 Difference]: Finished difference. Result has 465 places, 599 transitions, 8671 flow [2024-06-27 21:44:17,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8064, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8671, PETRI_PLACES=465, PETRI_TRANSITIONS=599} [2024-06-27 21:44:17,156 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 422 predicate places. [2024-06-27 21:44:17,157 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 599 transitions, 8671 flow [2024-06-27 21:44:17,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:44:17,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:44:17,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:44:17,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 21:44:17,157 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:44:17,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:44:17,157 INFO L85 PathProgramCache]: Analyzing trace with hash -733575527, now seen corresponding path program 1 times [2024-06-27 21:44:17,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:44:17,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692912787] [2024-06-27 21:44:17,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:44:17,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:44:17,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:44:17,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:44:17,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:44:17,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692912787] [2024-06-27 21:44:17,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692912787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:44:17,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:44:17,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:44:17,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745756134] [2024-06-27 21:44:17,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:44:17,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:44:17,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:44:17,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:44:17,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:44:17,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:44:17,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 599 transitions, 8671 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:44:17,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:44:17,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:44:17,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:44:19,632 INFO L124 PetriNetUnfolderBase]: 3902/6485 cut-off events. [2024-06-27 21:44:19,632 INFO L125 PetriNetUnfolderBase]: For 1149634/1149634 co-relation queries the response was YES. [2024-06-27 21:44:19,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62910 conditions, 6485 events. 3902/6485 cut-off events. For 1149634/1149634 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 43791 event pairs, 682 based on Foata normal form. 8/6481 useless extension candidates. Maximal degree in co-relation 62693. Up to 5881 conditions per place. [2024-06-27 21:44:19,741 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 599 selfloop transitions, 34 changer transitions 0/640 dead transitions. [2024-06-27 21:44:19,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 640 transitions, 10327 flow [2024-06-27 21:44:19,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:44:19,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:44:19,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 21:44:19,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-27 21:44:19,742 INFO L175 Difference]: Start difference. First operand has 465 places, 599 transitions, 8671 flow. Second operand 10 states and 196 transitions. [2024-06-27 21:44:19,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 640 transitions, 10327 flow [2024-06-27 21:44:26,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 640 transitions, 9764 flow, removed 69 selfloop flow, removed 8 redundant places. [2024-06-27 21:44:26,970 INFO L231 Difference]: Finished difference. Result has 470 places, 611 transitions, 8445 flow [2024-06-27 21:44:26,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8112, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8445, PETRI_PLACES=470, PETRI_TRANSITIONS=611} [2024-06-27 21:44:26,970 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 427 predicate places. [2024-06-27 21:44:26,971 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 611 transitions, 8445 flow [2024-06-27 21:44:26,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:44:26,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:44:26,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:44:26,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-27 21:44:26,971 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:44:26,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:44:26,972 INFO L85 PathProgramCache]: Analyzing trace with hash -299410595, now seen corresponding path program 2 times [2024-06-27 21:44:26,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:44:26,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235073580] [2024-06-27 21:44:26,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:44:26,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:44:26,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:44:27,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:44:27,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:44:27,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235073580] [2024-06-27 21:44:27,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235073580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:44:27,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:44:27,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:44:27,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504452835] [2024-06-27 21:44:27,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:44:27,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:44:27,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:44:27,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:44:27,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:44:27,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:44:27,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 611 transitions, 8445 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:44:27,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:44:27,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:44:27,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:44:29,426 INFO L124 PetriNetUnfolderBase]: 3930/6533 cut-off events. [2024-06-27 21:44:29,426 INFO L125 PetriNetUnfolderBase]: For 1150787/1150787 co-relation queries the response was YES. [2024-06-27 21:44:29,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62311 conditions, 6533 events. 3930/6533 cut-off events. For 1150787/1150787 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 44159 event pairs, 689 based on Foata normal form. 8/6533 useless extension candidates. Maximal degree in co-relation 62090. Up to 5858 conditions per place. [2024-06-27 21:44:29,534 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 590 selfloop transitions, 47 changer transitions 0/644 dead transitions. [2024-06-27 21:44:29,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 644 transitions, 9981 flow [2024-06-27 21:44:29,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:44:29,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:44:29,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-27 21:44:29,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48677248677248675 [2024-06-27 21:44:29,535 INFO L175 Difference]: Start difference. First operand has 470 places, 611 transitions, 8445 flow. Second operand 9 states and 184 transitions. [2024-06-27 21:44:29,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 644 transitions, 9981 flow [2024-06-27 21:44:37,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 644 transitions, 9874 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-27 21:44:37,072 INFO L231 Difference]: Finished difference. Result has 477 places, 614 transitions, 8551 flow [2024-06-27 21:44:37,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8338, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8551, PETRI_PLACES=477, PETRI_TRANSITIONS=614} [2024-06-27 21:44:37,073 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 434 predicate places. [2024-06-27 21:44:37,073 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 614 transitions, 8551 flow [2024-06-27 21:44:37,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:44:37,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:44:37,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:44:37,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-27 21:44:37,074 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:44:37,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:44:37,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1771485321, now seen corresponding path program 3 times [2024-06-27 21:44:37,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:44:37,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691716389] [2024-06-27 21:44:37,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:44:37,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:44:37,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:44:37,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:44:37,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:44:37,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691716389] [2024-06-27 21:44:37,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691716389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:44:37,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:44:37,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:44:37,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465867609] [2024-06-27 21:44:37,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:44:37,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:44:37,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:44:37,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:44:37,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:44:37,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:44:37,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 614 transitions, 8551 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:44:37,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:44:37,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:44:37,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:44:39,689 INFO L124 PetriNetUnfolderBase]: 3966/6596 cut-off events. [2024-06-27 21:44:39,689 INFO L125 PetriNetUnfolderBase]: For 1190957/1190957 co-relation queries the response was YES. [2024-06-27 21:44:39,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63136 conditions, 6596 events. 3966/6596 cut-off events. For 1190957/1190957 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 44670 event pairs, 706 based on Foata normal form. 10/6603 useless extension candidates. Maximal degree in co-relation 62913. Up to 5916 conditions per place. [2024-06-27 21:44:39,799 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 588 selfloop transitions, 48 changer transitions 0/643 dead transitions. [2024-06-27 21:44:39,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 643 transitions, 10091 flow [2024-06-27 21:44:39,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:44:39,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:44:39,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-27 21:44:39,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-27 21:44:39,800 INFO L175 Difference]: Start difference. First operand has 477 places, 614 transitions, 8551 flow. Second operand 9 states and 183 transitions. [2024-06-27 21:44:39,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 643 transitions, 10091 flow [2024-06-27 21:44:48,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 643 transitions, 9922 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-27 21:44:48,470 INFO L231 Difference]: Finished difference. Result has 480 places, 615 transitions, 8543 flow [2024-06-27 21:44:48,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8382, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8543, PETRI_PLACES=480, PETRI_TRANSITIONS=615} [2024-06-27 21:44:48,470 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 437 predicate places. [2024-06-27 21:44:48,470 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 615 transitions, 8543 flow [2024-06-27 21:44:48,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:44:48,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:44:48,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:44:48,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-27 21:44:48,471 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:44:48,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:44:48,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1998062465, now seen corresponding path program 4 times [2024-06-27 21:44:48,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:44:48,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550745828] [2024-06-27 21:44:48,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:44:48,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:44:48,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:44:49,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:44:49,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:44:49,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550745828] [2024-06-27 21:44:49,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550745828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:44:49,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:44:49,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:44:49,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558177379] [2024-06-27 21:44:49,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:44:49,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:44:49,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:44:49,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:44:49,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:44:49,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:44:49,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 615 transitions, 8543 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:44:49,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:44:49,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:44:49,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:44:51,031 INFO L124 PetriNetUnfolderBase]: 4002/6660 cut-off events. [2024-06-27 21:44:51,031 INFO L125 PetriNetUnfolderBase]: For 1208738/1208738 co-relation queries the response was YES. [2024-06-27 21:44:51,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63722 conditions, 6660 events. 4002/6660 cut-off events. For 1208738/1208738 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 45104 event pairs, 708 based on Foata normal form. 10/6667 useless extension candidates. Maximal degree in co-relation 63498. Up to 5950 conditions per place. [2024-06-27 21:44:51,144 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 578 selfloop transitions, 58 changer transitions 0/643 dead transitions. [2024-06-27 21:44:51,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 643 transitions, 10126 flow [2024-06-27 21:44:51,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:44:51,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:44:51,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-27 21:44:51,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-27 21:44:51,145 INFO L175 Difference]: Start difference. First operand has 480 places, 615 transitions, 8543 flow. Second operand 9 states and 182 transitions. [2024-06-27 21:44:51,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 643 transitions, 10126 flow [2024-06-27 21:44:58,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 643 transitions, 9995 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-27 21:44:58,240 INFO L231 Difference]: Finished difference. Result has 482 places, 616 transitions, 8595 flow [2024-06-27 21:44:58,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8412, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8595, PETRI_PLACES=482, PETRI_TRANSITIONS=616} [2024-06-27 21:44:58,240 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 439 predicate places. [2024-06-27 21:44:58,240 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 616 transitions, 8595 flow [2024-06-27 21:44:58,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:44:58,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:44:58,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:44:58,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-27 21:44:58,240 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:44:58,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:44:58,241 INFO L85 PathProgramCache]: Analyzing trace with hash 421856861, now seen corresponding path program 5 times [2024-06-27 21:44:58,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:44:58,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955760602] [2024-06-27 21:44:58,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:44:58,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:44:58,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:44:58,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:44:58,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:44:58,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955760602] [2024-06-27 21:44:58,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955760602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:44:58,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:44:58,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:44:58,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318526799] [2024-06-27 21:44:58,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:44:58,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:44:58,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:44:58,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:44:58,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:44:58,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:44:58,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 616 transitions, 8595 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:44:58,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:44:58,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:44:58,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:45:00,792 INFO L124 PetriNetUnfolderBase]: 4038/6720 cut-off events. [2024-06-27 21:45:00,792 INFO L125 PetriNetUnfolderBase]: For 1225647/1225647 co-relation queries the response was YES. [2024-06-27 21:45:00,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64438 conditions, 6720 events. 4038/6720 cut-off events. For 1225647/1225647 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 45561 event pairs, 715 based on Foata normal form. 10/6728 useless extension candidates. Maximal degree in co-relation 64213. Up to 6079 conditions per place. [2024-06-27 21:45:00,906 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 603 selfloop transitions, 38 changer transitions 0/648 dead transitions. [2024-06-27 21:45:00,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 648 transitions, 10160 flow [2024-06-27 21:45:00,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:45:00,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:45:00,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-27 21:45:00,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-27 21:45:00,907 INFO L175 Difference]: Start difference. First operand has 482 places, 616 transitions, 8595 flow. Second operand 9 states and 182 transitions. [2024-06-27 21:45:00,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 648 transitions, 10160 flow [2024-06-27 21:45:09,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 648 transitions, 10007 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-27 21:45:09,171 INFO L231 Difference]: Finished difference. Result has 484 places, 617 transitions, 8587 flow [2024-06-27 21:45:09,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8442, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8587, PETRI_PLACES=484, PETRI_TRANSITIONS=617} [2024-06-27 21:45:09,172 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 441 predicate places. [2024-06-27 21:45:09,172 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 617 transitions, 8587 flow [2024-06-27 21:45:09,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:45:09,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:45:09,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:45:09,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-27 21:45:09,172 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:45:09,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:45:09,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1796862173, now seen corresponding path program 6 times [2024-06-27 21:45:09,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:45:09,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887291264] [2024-06-27 21:45:09,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:45:09,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:45:09,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:45:09,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:45:09,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:45:09,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887291264] [2024-06-27 21:45:09,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887291264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:45:09,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:45:09,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:45:09,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652351749] [2024-06-27 21:45:09,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:45:09,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:45:09,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:45:09,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:45:09,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:45:09,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:45:09,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 617 transitions, 8587 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:45:09,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:45:09,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:45:09,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:45:11,718 INFO L124 PetriNetUnfolderBase]: 4066/6770 cut-off events. [2024-06-27 21:45:11,718 INFO L125 PetriNetUnfolderBase]: For 1217496/1217496 co-relation queries the response was YES. [2024-06-27 21:45:11,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64873 conditions, 6770 events. 4066/6770 cut-off events. For 1217496/1217496 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 45970 event pairs, 662 based on Foata normal form. 8/6776 useless extension candidates. Maximal degree in co-relation 64647. Up to 6037 conditions per place. [2024-06-27 21:45:11,833 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 610 selfloop transitions, 43 changer transitions 0/660 dead transitions. [2024-06-27 21:45:11,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 660 transitions, 10242 flow [2024-06-27 21:45:11,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:45:11,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:45:11,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-27 21:45:11,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-06-27 21:45:11,834 INFO L175 Difference]: Start difference. First operand has 484 places, 617 transitions, 8587 flow. Second operand 10 states and 203 transitions. [2024-06-27 21:45:11,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 660 transitions, 10242 flow [2024-06-27 21:45:20,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 660 transitions, 10127 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 21:45:20,159 INFO L231 Difference]: Finished difference. Result has 489 places, 622 transitions, 8754 flow [2024-06-27 21:45:20,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8472, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8754, PETRI_PLACES=489, PETRI_TRANSITIONS=622} [2024-06-27 21:45:20,159 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 446 predicate places. [2024-06-27 21:45:20,159 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 622 transitions, 8754 flow [2024-06-27 21:45:20,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:45:20,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:45:20,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:45:20,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-27 21:45:20,160 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:45:20,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:45:20,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1797099323, now seen corresponding path program 7 times [2024-06-27 21:45:20,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:45:20,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311550602] [2024-06-27 21:45:20,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:45:20,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:45:20,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:45:20,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:45:20,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:45:20,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311550602] [2024-06-27 21:45:20,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311550602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:45:20,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:45:20,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:45:20,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254583153] [2024-06-27 21:45:20,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:45:20,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:45:20,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:45:20,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:45:20,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:45:20,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:45:20,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 622 transitions, 8754 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:45:20,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:45:20,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:45:20,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:45:22,740 INFO L124 PetriNetUnfolderBase]: 4140/6896 cut-off events. [2024-06-27 21:45:22,740 INFO L125 PetriNetUnfolderBase]: For 1327373/1327373 co-relation queries the response was YES. [2024-06-27 21:45:22,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68064 conditions, 6896 events. 4140/6896 cut-off events. For 1327373/1327373 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 46941 event pairs, 676 based on Foata normal form. 8/6902 useless extension candidates. Maximal degree in co-relation 67835. Up to 6029 conditions per place. [2024-06-27 21:45:22,861 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 609 selfloop transitions, 47 changer transitions 0/663 dead transitions. [2024-06-27 21:45:22,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 663 transitions, 10753 flow [2024-06-27 21:45:22,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:45:22,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:45:22,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-27 21:45:22,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-06-27 21:45:22,862 INFO L175 Difference]: Start difference. First operand has 489 places, 622 transitions, 8754 flow. Second operand 10 states and 204 transitions. [2024-06-27 21:45:22,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 663 transitions, 10753 flow [2024-06-27 21:45:33,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 663 transitions, 10555 flow, removed 65 selfloop flow, removed 6 redundant places. [2024-06-27 21:45:33,105 INFO L231 Difference]: Finished difference. Result has 493 places, 624 transitions, 8788 flow [2024-06-27 21:45:33,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8556, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8788, PETRI_PLACES=493, PETRI_TRANSITIONS=624} [2024-06-27 21:45:33,106 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 450 predicate places. [2024-06-27 21:45:33,106 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 624 transitions, 8788 flow [2024-06-27 21:45:33,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:45:33,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:45:33,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:45:33,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-27 21:45:33,106 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:45:33,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:45:33,106 INFO L85 PathProgramCache]: Analyzing trace with hash 642291929, now seen corresponding path program 8 times [2024-06-27 21:45:33,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:45:33,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291998302] [2024-06-27 21:45:33,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:45:33,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:45:33,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:45:33,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:45:33,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:45:33,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291998302] [2024-06-27 21:45:33,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291998302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:45:33,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:45:33,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:45:33,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214349272] [2024-06-27 21:45:33,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:45:33,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:45:33,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:45:33,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:45:33,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:45:33,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:45:33,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 624 transitions, 8788 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:45:33,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:45:33,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:45:33,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:45:35,764 INFO L124 PetriNetUnfolderBase]: 4227/7037 cut-off events. [2024-06-27 21:45:35,764 INFO L125 PetriNetUnfolderBase]: For 1463460/1463460 co-relation queries the response was YES. [2024-06-27 21:45:35,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71326 conditions, 7037 events. 4227/7037 cut-off events. For 1463460/1463460 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 48003 event pairs, 755 based on Foata normal form. 8/7043 useless extension candidates. Maximal degree in co-relation 71096. Up to 6242 conditions per place. [2024-06-27 21:45:35,891 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 605 selfloop transitions, 51 changer transitions 0/663 dead transitions. [2024-06-27 21:45:35,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 663 transitions, 10849 flow [2024-06-27 21:45:35,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:45:35,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:45:35,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-27 21:45:35,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-06-27 21:45:35,892 INFO L175 Difference]: Start difference. First operand has 493 places, 624 transitions, 8788 flow. Second operand 10 states and 203 transitions. [2024-06-27 21:45:35,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 663 transitions, 10849 flow [2024-06-27 21:45:45,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 663 transitions, 10723 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 21:45:45,937 INFO L231 Difference]: Finished difference. Result has 497 places, 626 transitions, 8912 flow [2024-06-27 21:45:45,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8668, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8912, PETRI_PLACES=497, PETRI_TRANSITIONS=626} [2024-06-27 21:45:45,937 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 454 predicate places. [2024-06-27 21:45:45,937 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 626 transitions, 8912 flow [2024-06-27 21:45:45,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:45:45,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:45:45,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:45:45,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-27 21:45:45,937 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:45:45,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:45:45,938 INFO L85 PathProgramCache]: Analyzing trace with hash 642352379, now seen corresponding path program 9 times [2024-06-27 21:45:45,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:45:45,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953895049] [2024-06-27 21:45:45,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:45:45,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:45:45,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:45:46,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:45:46,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:45:46,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953895049] [2024-06-27 21:45:46,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953895049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:45:46,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:45:46,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:45:46,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142000624] [2024-06-27 21:45:46,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:45:46,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:45:46,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:45:46,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:45:46,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:45:46,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:45:46,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 626 transitions, 8912 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:45:46,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:45:46,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:45:46,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:45:48,599 INFO L124 PetriNetUnfolderBase]: 4204/7008 cut-off events. [2024-06-27 21:45:48,599 INFO L125 PetriNetUnfolderBase]: For 1385919/1385919 co-relation queries the response was YES. [2024-06-27 21:45:48,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68987 conditions, 7008 events. 4204/7008 cut-off events. For 1385919/1385919 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 47867 event pairs, 758 based on Foata normal form. 10/7016 useless extension candidates. Maximal degree in co-relation 68755. Up to 6316 conditions per place. [2024-06-27 21:45:48,724 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 602 selfloop transitions, 50 changer transitions 0/659 dead transitions. [2024-06-27 21:45:48,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 659 transitions, 10481 flow [2024-06-27 21:45:48,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:45:48,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:45:48,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-27 21:45:48,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 21:45:48,725 INFO L175 Difference]: Start difference. First operand has 497 places, 626 transitions, 8912 flow. Second operand 10 states and 200 transitions. [2024-06-27 21:45:48,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 659 transitions, 10481 flow [2024-06-27 21:45:56,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 659 transitions, 10327 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-27 21:45:56,733 INFO L231 Difference]: Finished difference. Result has 501 places, 626 transitions, 8863 flow [2024-06-27 21:45:56,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8758, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8863, PETRI_PLACES=501, PETRI_TRANSITIONS=626} [2024-06-27 21:45:56,733 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 458 predicate places. [2024-06-27 21:45:56,733 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 626 transitions, 8863 flow [2024-06-27 21:45:56,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:45:56,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:45:56,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:45:56,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-27 21:45:56,733 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:45:56,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:45:56,734 INFO L85 PathProgramCache]: Analyzing trace with hash 2064299895, now seen corresponding path program 10 times [2024-06-27 21:45:56,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:45:56,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991971882] [2024-06-27 21:45:56,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:45:56,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:45:56,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:45:57,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:45:57,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:45:57,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991971882] [2024-06-27 21:45:57,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991971882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:45:57,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:45:57,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:45:57,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844345379] [2024-06-27 21:45:57,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:45:57,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:45:57,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:45:57,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:45:57,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:45:57,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:45:57,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 626 transitions, 8863 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:45:57,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:45:57,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:45:57,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:45:59,491 INFO L124 PetriNetUnfolderBase]: 4240/7057 cut-off events. [2024-06-27 21:45:59,492 INFO L125 PetriNetUnfolderBase]: For 1397642/1397642 co-relation queries the response was YES. [2024-06-27 21:45:59,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69404 conditions, 7057 events. 4240/7057 cut-off events. For 1397642/1397642 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 48176 event pairs, 778 based on Foata normal form. 10/7065 useless extension candidates. Maximal degree in co-relation 69170. Up to 6394 conditions per place. [2024-06-27 21:45:59,620 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 593 selfloop transitions, 49 changer transitions 0/649 dead transitions. [2024-06-27 21:45:59,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 649 transitions, 10411 flow [2024-06-27 21:45:59,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:45:59,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:45:59,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 21:45:59,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-27 21:45:59,621 INFO L175 Difference]: Start difference. First operand has 501 places, 626 transitions, 8863 flow. Second operand 9 states and 175 transitions. [2024-06-27 21:45:59,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 649 transitions, 10411 flow [2024-06-27 21:46:07,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 649 transitions, 10299 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 21:46:07,801 INFO L231 Difference]: Finished difference. Result has 501 places, 627 transitions, 8926 flow [2024-06-27 21:46:07,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8751, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8926, PETRI_PLACES=501, PETRI_TRANSITIONS=627} [2024-06-27 21:46:07,802 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 458 predicate places. [2024-06-27 21:46:07,802 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 627 transitions, 8926 flow [2024-06-27 21:46:07,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:46:07,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:46:07,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:46:07,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-27 21:46:07,803 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:46:07,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:46:07,803 INFO L85 PathProgramCache]: Analyzing trace with hash 2061442935, now seen corresponding path program 11 times [2024-06-27 21:46:07,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:46:07,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519193585] [2024-06-27 21:46:07,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:46:07,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:46:07,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:46:08,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:46:08,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:46:08,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519193585] [2024-06-27 21:46:08,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519193585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:46:08,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:46:08,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:46:08,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030123576] [2024-06-27 21:46:08,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:46:08,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:46:08,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:46:08,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:46:08,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:46:08,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:46:08,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 627 transitions, 8926 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:46:08,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:46:08,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:46:08,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:46:10,695 INFO L124 PetriNetUnfolderBase]: 4268/7105 cut-off events. [2024-06-27 21:46:10,695 INFO L125 PetriNetUnfolderBase]: For 1398527/1398527 co-relation queries the response was YES. [2024-06-27 21:46:10,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70286 conditions, 7105 events. 4268/7105 cut-off events. For 1398527/1398527 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 48592 event pairs, 776 based on Foata normal form. 8/7111 useless extension candidates. Maximal degree in co-relation 70051. Up to 6398 conditions per place. [2024-06-27 21:46:10,824 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 596 selfloop transitions, 52 changer transitions 0/655 dead transitions. [2024-06-27 21:46:10,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 655 transitions, 10574 flow [2024-06-27 21:46:10,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:46:10,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:46:10,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-27 21:46:10,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-06-27 21:46:10,825 INFO L175 Difference]: Start difference. First operand has 501 places, 627 transitions, 8926 flow. Second operand 10 states and 194 transitions. [2024-06-27 21:46:10,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 655 transitions, 10574 flow [2024-06-27 21:46:18,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 655 transitions, 10429 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-27 21:46:18,625 INFO L231 Difference]: Finished difference. Result has 504 places, 628 transitions, 8963 flow [2024-06-27 21:46:18,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8781, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8963, PETRI_PLACES=504, PETRI_TRANSITIONS=628} [2024-06-27 21:46:18,625 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 461 predicate places. [2024-06-27 21:46:18,625 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 628 transitions, 8963 flow [2024-06-27 21:46:18,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:46:18,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:46:18,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:46:18,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-27 21:46:18,626 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:46:18,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:46:18,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1893365059, now seen corresponding path program 12 times [2024-06-27 21:46:18,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:46:18,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658022592] [2024-06-27 21:46:18,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:46:18,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:46:18,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:46:19,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:46:19,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:46:19,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658022592] [2024-06-27 21:46:19,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658022592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:46:19,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:46:19,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:46:19,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041092823] [2024-06-27 21:46:19,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:46:19,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:46:19,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:46:19,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:46:19,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:46:19,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:46:19,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 628 transitions, 8963 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:46:19,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:46:19,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:46:19,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:46:22,149 INFO L124 PetriNetUnfolderBase]: 4304/7183 cut-off events. [2024-06-27 21:46:22,150 INFO L125 PetriNetUnfolderBase]: For 1443928/1443928 co-relation queries the response was YES. [2024-06-27 21:46:22,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71027 conditions, 7183 events. 4304/7183 cut-off events. For 1443928/1443928 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 49376 event pairs, 782 based on Foata normal form. 10/7190 useless extension candidates. Maximal degree in co-relation 70791. Up to 6341 conditions per place. [2024-06-27 21:46:22,268 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 555 selfloop transitions, 91 changer transitions 0/653 dead transitions. [2024-06-27 21:46:22,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 653 transitions, 10599 flow [2024-06-27 21:46:22,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:46:22,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:46:22,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-27 21:46:22,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47883597883597884 [2024-06-27 21:46:22,269 INFO L175 Difference]: Start difference. First operand has 504 places, 628 transitions, 8963 flow. Second operand 9 states and 181 transitions. [2024-06-27 21:46:22,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 653 transitions, 10599 flow [2024-06-27 21:46:30,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 653 transitions, 10445 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-27 21:46:30,766 INFO L231 Difference]: Finished difference. Result has 505 places, 629 transitions, 9072 flow [2024-06-27 21:46:30,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8809, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9072, PETRI_PLACES=505, PETRI_TRANSITIONS=629} [2024-06-27 21:46:30,766 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 462 predicate places. [2024-06-27 21:46:30,766 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 629 transitions, 9072 flow [2024-06-27 21:46:30,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:46:30,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:46:30,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:46:30,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-27 21:46:30,767 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:46:30,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:46:30,767 INFO L85 PathProgramCache]: Analyzing trace with hash 948305083, now seen corresponding path program 1 times [2024-06-27 21:46:30,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:46:30,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721449562] [2024-06-27 21:46:30,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:46:30,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:46:30,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:46:31,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:46:31,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:46:31,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721449562] [2024-06-27 21:46:31,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721449562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:46:31,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:46:31,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:46:31,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342547441] [2024-06-27 21:46:31,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:46:31,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:46:31,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:46:31,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:46:31,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:46:31,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:46:31,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 629 transitions, 9072 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:46:31,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:46:31,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:46:31,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:46:34,219 INFO L124 PetriNetUnfolderBase]: 4320/7185 cut-off events. [2024-06-27 21:46:34,219 INFO L125 PetriNetUnfolderBase]: For 1352829/1352829 co-relation queries the response was YES. [2024-06-27 21:46:34,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71086 conditions, 7185 events. 4320/7185 cut-off events. For 1352829/1352829 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 49272 event pairs, 807 based on Foata normal form. 1/7182 useless extension candidates. Maximal degree in co-relation 70849. Up to 6419 conditions per place. [2024-06-27 21:46:34,354 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 587 selfloop transitions, 66 changer transitions 0/660 dead transitions. [2024-06-27 21:46:34,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 660 transitions, 10624 flow [2024-06-27 21:46:34,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:46:34,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:46:34,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-27 21:46:34,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-06-27 21:46:34,355 INFO L175 Difference]: Start difference. First operand has 505 places, 629 transitions, 9072 flow. Second operand 9 states and 186 transitions. [2024-06-27 21:46:34,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 660 transitions, 10624 flow [2024-06-27 21:46:45,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 660 transitions, 10391 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-27 21:46:45,338 INFO L231 Difference]: Finished difference. Result has 507 places, 635 transitions, 9155 flow [2024-06-27 21:46:45,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8839, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9155, PETRI_PLACES=507, PETRI_TRANSITIONS=635} [2024-06-27 21:46:45,338 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 464 predicate places. [2024-06-27 21:46:45,338 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 635 transitions, 9155 flow [2024-06-27 21:46:45,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:46:45,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:46:45,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:46:45,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-27 21:46:45,338 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:46:45,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:46:45,339 INFO L85 PathProgramCache]: Analyzing trace with hash 335047383, now seen corresponding path program 2 times [2024-06-27 21:46:45,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:46:45,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52191817] [2024-06-27 21:46:45,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:46:45,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:46:45,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:46:46,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:46:46,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:46:46,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52191817] [2024-06-27 21:46:46,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52191817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:46:46,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:46:46,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:46:46,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759368830] [2024-06-27 21:46:46,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:46:46,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:46:46,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:46:46,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:46:46,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:46:46,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:46:46,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 635 transitions, 9155 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:46:46,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:46:46,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:46:46,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:46:48,722 INFO L124 PetriNetUnfolderBase]: 4325/7194 cut-off events. [2024-06-27 21:46:48,722 INFO L125 PetriNetUnfolderBase]: For 1365640/1365640 co-relation queries the response was YES. [2024-06-27 21:46:48,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71281 conditions, 7194 events. 4325/7194 cut-off events. For 1365640/1365640 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 49311 event pairs, 807 based on Foata normal form. 1/7191 useless extension candidates. Maximal degree in co-relation 71043. Up to 6426 conditions per place. [2024-06-27 21:46:48,854 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 588 selfloop transitions, 68 changer transitions 0/663 dead transitions. [2024-06-27 21:46:48,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 663 transitions, 10693 flow [2024-06-27 21:46:48,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:46:48,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:46:48,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-27 21:46:48,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4894179894179894 [2024-06-27 21:46:48,855 INFO L175 Difference]: Start difference. First operand has 507 places, 635 transitions, 9155 flow. Second operand 9 states and 185 transitions. [2024-06-27 21:46:48,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 663 transitions, 10693 flow [2024-06-27 21:46:59,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 663 transitions, 10427 flow, removed 70 selfloop flow, removed 6 redundant places. [2024-06-27 21:46:59,571 INFO L231 Difference]: Finished difference. Result has 510 places, 638 transitions, 9189 flow [2024-06-27 21:46:59,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8889, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9189, PETRI_PLACES=510, PETRI_TRANSITIONS=638} [2024-06-27 21:46:59,571 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 467 predicate places. [2024-06-27 21:46:59,571 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 638 transitions, 9189 flow [2024-06-27 21:46:59,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:46:59,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:46:59,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:46:59,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-27 21:46:59,571 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:46:59,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:46:59,572 INFO L85 PathProgramCache]: Analyzing trace with hash -31525063, now seen corresponding path program 3 times [2024-06-27 21:46:59,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:46:59,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070472752] [2024-06-27 21:46:59,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:46:59,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:46:59,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:47:00,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:47:00,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:47:00,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070472752] [2024-06-27 21:47:00,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070472752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:47:00,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:47:00,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:47:00,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765241865] [2024-06-27 21:47:00,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:47:00,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:47:00,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:47:00,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:47:00,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:47:00,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:47:00,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 638 transitions, 9189 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:47:00,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:47:00,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:47:00,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:47:02,818 INFO L124 PetriNetUnfolderBase]: 4338/7212 cut-off events. [2024-06-27 21:47:02,818 INFO L125 PetriNetUnfolderBase]: For 1407293/1407293 co-relation queries the response was YES. [2024-06-27 21:47:02,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72345 conditions, 7212 events. 4338/7212 cut-off events. For 1407293/1407293 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 49466 event pairs, 807 based on Foata normal form. 1/7209 useless extension candidates. Maximal degree in co-relation 72106. Up to 6431 conditions per place. [2024-06-27 21:47:03,099 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 581 selfloop transitions, 79 changer transitions 0/667 dead transitions. [2024-06-27 21:47:03,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 667 transitions, 11199 flow [2024-06-27 21:47:03,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:47:03,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:47:03,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-27 21:47:03,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48677248677248675 [2024-06-27 21:47:03,100 INFO L175 Difference]: Start difference. First operand has 510 places, 638 transitions, 9189 flow. Second operand 9 states and 184 transitions. [2024-06-27 21:47:03,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 667 transitions, 11199 flow [2024-06-27 21:47:13,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 667 transitions, 10915 flow, removed 73 selfloop flow, removed 7 redundant places. [2024-06-27 21:47:13,863 INFO L231 Difference]: Finished difference. Result has 512 places, 644 transitions, 9391 flow [2024-06-27 21:47:13,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8905, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9391, PETRI_PLACES=512, PETRI_TRANSITIONS=644} [2024-06-27 21:47:13,864 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 469 predicate places. [2024-06-27 21:47:13,864 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 644 transitions, 9391 flow [2024-06-27 21:47:13,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:47:13,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:47:13,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:47:13,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-27 21:47:13,864 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:47:13,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:47:13,864 INFO L85 PathProgramCache]: Analyzing trace with hash 2145493593, now seen corresponding path program 1 times [2024-06-27 21:47:13,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:47:13,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107801049] [2024-06-27 21:47:13,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:47:13,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:47:13,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:47:14,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:47:14,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:47:14,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107801049] [2024-06-27 21:47:14,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107801049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:47:14,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:47:14,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:47:14,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301927949] [2024-06-27 21:47:14,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:47:14,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:47:14,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:47:14,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:47:14,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:47:14,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:47:14,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 644 transitions, 9391 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:47:14,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:47:14,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:47:14,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:47:17,034 INFO L124 PetriNetUnfolderBase]: 4343/7226 cut-off events. [2024-06-27 21:47:17,034 INFO L125 PetriNetUnfolderBase]: For 1430686/1430686 co-relation queries the response was YES. [2024-06-27 21:47:17,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72943 conditions, 7226 events. 4343/7226 cut-off events. For 1430686/1430686 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 49523 event pairs, 804 based on Foata normal form. 1/7219 useless extension candidates. Maximal degree in co-relation 72703. Up to 6531 conditions per place. [2024-06-27 21:47:17,157 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 611 selfloop transitions, 54 changer transitions 0/672 dead transitions. [2024-06-27 21:47:17,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 672 transitions, 10979 flow [2024-06-27 21:47:17,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:47:17,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:47:17,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 21:47:17,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-27 21:47:17,158 INFO L175 Difference]: Start difference. First operand has 512 places, 644 transitions, 9391 flow. Second operand 9 states and 173 transitions. [2024-06-27 21:47:17,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 672 transitions, 10979 flow [2024-06-27 21:47:26,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 672 transitions, 10711 flow, removed 94 selfloop flow, removed 5 redundant places. [2024-06-27 21:47:26,856 INFO L231 Difference]: Finished difference. Result has 518 places, 655 transitions, 9477 flow [2024-06-27 21:47:26,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9123, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9477, PETRI_PLACES=518, PETRI_TRANSITIONS=655} [2024-06-27 21:47:26,857 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 475 predicate places. [2024-06-27 21:47:26,857 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 655 transitions, 9477 flow [2024-06-27 21:47:26,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:47:26,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:47:26,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:47:26,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-27 21:47:26,857 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:47:26,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:47:26,858 INFO L85 PathProgramCache]: Analyzing trace with hash 903225095, now seen corresponding path program 2 times [2024-06-27 21:47:26,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:47:26,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938207039] [2024-06-27 21:47:26,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:47:26,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:47:26,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:47:27,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:47:27,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:47:27,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938207039] [2024-06-27 21:47:27,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938207039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:47:27,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:47:27,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:47:27,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197333460] [2024-06-27 21:47:27,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:47:27,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:47:27,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:47:27,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:47:27,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:47:27,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:47:27,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 655 transitions, 9477 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:47:27,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:47:27,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:47:27,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:47:30,066 INFO L124 PetriNetUnfolderBase]: 4356/7252 cut-off events. [2024-06-27 21:47:30,066 INFO L125 PetriNetUnfolderBase]: For 1474451/1474451 co-relation queries the response was YES. [2024-06-27 21:47:30,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73928 conditions, 7252 events. 4356/7252 cut-off events. For 1474451/1474451 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 49823 event pairs, 815 based on Foata normal form. 1/7242 useless extension candidates. Maximal degree in co-relation 73684. Up to 6477 conditions per place. [2024-06-27 21:47:30,201 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 596 selfloop transitions, 90 changer transitions 0/693 dead transitions. [2024-06-27 21:47:30,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 693 transitions, 11583 flow [2024-06-27 21:47:30,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:47:30,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:47:30,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 21:47:30,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-27 21:47:30,202 INFO L175 Difference]: Start difference. First operand has 518 places, 655 transitions, 9477 flow. Second operand 9 states and 178 transitions. [2024-06-27 21:47:30,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 693 transitions, 11583 flow [2024-06-27 21:47:41,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 693 transitions, 11343 flow, removed 84 selfloop flow, removed 5 redundant places. [2024-06-27 21:47:41,357 INFO L231 Difference]: Finished difference. Result has 524 places, 678 transitions, 9895 flow [2024-06-27 21:47:41,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9245, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9895, PETRI_PLACES=524, PETRI_TRANSITIONS=678} [2024-06-27 21:47:41,358 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 481 predicate places. [2024-06-27 21:47:41,358 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 678 transitions, 9895 flow [2024-06-27 21:47:41,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:47:41,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:47:41,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:47:41,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-27 21:47:41,358 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:47:41,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:47:41,358 INFO L85 PathProgramCache]: Analyzing trace with hash -125931689, now seen corresponding path program 4 times [2024-06-27 21:47:41,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:47:41,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40522763] [2024-06-27 21:47:41,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:47:41,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:47:41,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:47:42,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:47:42,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:47:42,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40522763] [2024-06-27 21:47:42,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40522763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:47:42,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:47:42,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:47:42,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163288401] [2024-06-27 21:47:42,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:47:42,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:47:42,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:47:42,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:47:42,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:47:42,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:47:42,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 678 transitions, 9895 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:47:42,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:47:42,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:47:42,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:47:44,688 INFO L124 PetriNetUnfolderBase]: 4353/7258 cut-off events. [2024-06-27 21:47:44,688 INFO L125 PetriNetUnfolderBase]: For 1467298/1467298 co-relation queries the response was YES. [2024-06-27 21:47:44,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74278 conditions, 7258 events. 4353/7258 cut-off events. For 1467298/1467298 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 49885 event pairs, 781 based on Foata normal form. 1/7257 useless extension candidates. Maximal degree in co-relation 74031. Up to 6595 conditions per place. [2024-06-27 21:47:44,814 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 659 selfloop transitions, 40 changer transitions 0/706 dead transitions. [2024-06-27 21:47:44,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 706 transitions, 11378 flow [2024-06-27 21:47:44,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:47:44,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:47:44,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-27 21:47:44,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47883597883597884 [2024-06-27 21:47:44,815 INFO L175 Difference]: Start difference. First operand has 524 places, 678 transitions, 9895 flow. Second operand 9 states and 181 transitions. [2024-06-27 21:47:44,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 706 transitions, 11378 flow [2024-06-27 21:47:54,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 706 transitions, 11064 flow, removed 132 selfloop flow, removed 3 redundant places. [2024-06-27 21:47:54,788 INFO L231 Difference]: Finished difference. Result has 530 places, 678 transitions, 9667 flow [2024-06-27 21:47:54,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9581, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=638, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9667, PETRI_PLACES=530, PETRI_TRANSITIONS=678} [2024-06-27 21:47:54,788 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 487 predicate places. [2024-06-27 21:47:54,789 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 678 transitions, 9667 flow [2024-06-27 21:47:54,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:47:54,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:47:54,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:47:54,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-27 21:47:54,789 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:47:54,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:47:54,789 INFO L85 PathProgramCache]: Analyzing trace with hash 620746231, now seen corresponding path program 3 times [2024-06-27 21:47:54,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:47:54,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670903840] [2024-06-27 21:47:54,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:47:54,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:47:54,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:47:55,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:47:55,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:47:55,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670903840] [2024-06-27 21:47:55,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670903840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:47:55,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:47:55,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:47:55,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740254955] [2024-06-27 21:47:55,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:47:55,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:47:55,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:47:55,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:47:55,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:47:55,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:47:55,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 678 transitions, 9667 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:47:55,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:47:55,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:47:55,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:47:58,098 INFO L124 PetriNetUnfolderBase]: 4358/7257 cut-off events. [2024-06-27 21:47:58,098 INFO L125 PetriNetUnfolderBase]: For 1494861/1494861 co-relation queries the response was YES. [2024-06-27 21:47:58,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74004 conditions, 7257 events. 4358/7257 cut-off events. For 1494861/1494861 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 49906 event pairs, 815 based on Foata normal form. 1/7247 useless extension candidates. Maximal degree in co-relation 73755. Up to 6497 conditions per place. [2024-06-27 21:47:58,224 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 612 selfloop transitions, 79 changer transitions 0/698 dead transitions. [2024-06-27 21:47:58,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 698 transitions, 11210 flow [2024-06-27 21:47:58,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:47:58,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:47:58,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-27 21:47:58,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-27 21:47:58,225 INFO L175 Difference]: Start difference. First operand has 530 places, 678 transitions, 9667 flow. Second operand 9 states and 174 transitions. [2024-06-27 21:47:58,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 698 transitions, 11210 flow [2024-06-27 21:48:10,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 698 transitions, 11081 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-27 21:48:10,180 INFO L231 Difference]: Finished difference. Result has 530 places, 684 transitions, 9831 flow [2024-06-27 21:48:10,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9538, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=602, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9831, PETRI_PLACES=530, PETRI_TRANSITIONS=684} [2024-06-27 21:48:10,180 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 487 predicate places. [2024-06-27 21:48:10,180 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 684 transitions, 9831 flow [2024-06-27 21:48:10,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:48:10,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:48:10,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:48:10,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-27 21:48:10,181 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:48:10,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:48:10,181 INFO L85 PathProgramCache]: Analyzing trace with hash 967221643, now seen corresponding path program 4 times [2024-06-27 21:48:10,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:48:10,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521671935] [2024-06-27 21:48:10,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:48:10,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:48:10,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:48:10,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:48:10,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:48:10,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521671935] [2024-06-27 21:48:10,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521671935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:48:10,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:48:10,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:48:10,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499339279] [2024-06-27 21:48:10,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:48:10,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:48:10,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:48:10,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:48:10,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:48:10,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:48:10,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 684 transitions, 9831 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:48:10,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:48:10,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:48:10,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:48:13,357 INFO L124 PetriNetUnfolderBase]: 4363/7260 cut-off events. [2024-06-27 21:48:13,358 INFO L125 PetriNetUnfolderBase]: For 1512061/1512061 co-relation queries the response was YES. [2024-06-27 21:48:13,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74264 conditions, 7260 events. 4363/7260 cut-off events. For 1512061/1512061 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 49952 event pairs, 814 based on Foata normal form. 1/7250 useless extension candidates. Maximal degree in co-relation 74014. Up to 6549 conditions per place. [2024-06-27 21:48:13,485 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 628 selfloop transitions, 65 changer transitions 0/700 dead transitions. [2024-06-27 21:48:13,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 700 transitions, 11343 flow [2024-06-27 21:48:13,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:48:13,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:48:13,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 21:48:13,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-27 21:48:13,486 INFO L175 Difference]: Start difference. First operand has 530 places, 684 transitions, 9831 flow. Second operand 8 states and 161 transitions. [2024-06-27 21:48:13,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 700 transitions, 11343 flow [2024-06-27 21:48:24,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 700 transitions, 11142 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-27 21:48:24,539 INFO L231 Difference]: Finished difference. Result has 534 places, 687 transitions, 9867 flow [2024-06-27 21:48:24,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9630, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9867, PETRI_PLACES=534, PETRI_TRANSITIONS=687} [2024-06-27 21:48:24,540 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 491 predicate places. [2024-06-27 21:48:24,540 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 687 transitions, 9867 flow [2024-06-27 21:48:24,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:48:24,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:48:24,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:48:24,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-27 21:48:24,540 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:48:24,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:48:24,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1934824121, now seen corresponding path program 5 times [2024-06-27 21:48:24,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:48:24,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151617725] [2024-06-27 21:48:24,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:48:24,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:48:24,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:48:25,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:48:25,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:48:25,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151617725] [2024-06-27 21:48:25,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151617725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:48:25,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:48:25,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:48:25,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374861511] [2024-06-27 21:48:25,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:48:25,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:48:25,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:48:25,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:48:25,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:48:25,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:48:25,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 687 transitions, 9867 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:48:25,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:48:25,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:48:25,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:48:27,814 INFO L124 PetriNetUnfolderBase]: 4368/7273 cut-off events. [2024-06-27 21:48:27,814 INFO L125 PetriNetUnfolderBase]: For 1528898/1528898 co-relation queries the response was YES. [2024-06-27 21:48:27,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74382 conditions, 7273 events. 4368/7273 cut-off events. For 1528898/1528898 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 49994 event pairs, 810 based on Foata normal form. 1/7263 useless extension candidates. Maximal degree in co-relation 74131. Up to 6457 conditions per place. [2024-06-27 21:48:27,942 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 596 selfloop transitions, 109 changer transitions 0/712 dead transitions. [2024-06-27 21:48:27,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 712 transitions, 11539 flow [2024-06-27 21:48:27,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:48:27,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:48:27,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-27 21:48:27,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47883597883597884 [2024-06-27 21:48:27,943 INFO L175 Difference]: Start difference. First operand has 534 places, 687 transitions, 9867 flow. Second operand 9 states and 181 transitions. [2024-06-27 21:48:27,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 712 transitions, 11539 flow [2024-06-27 21:48:38,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 712 transitions, 11354 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-27 21:48:38,616 INFO L231 Difference]: Finished difference. Result has 540 places, 698 transitions, 10197 flow [2024-06-27 21:48:38,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9682, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10197, PETRI_PLACES=540, PETRI_TRANSITIONS=698} [2024-06-27 21:48:38,616 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 497 predicate places. [2024-06-27 21:48:38,616 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 698 transitions, 10197 flow [2024-06-27 21:48:38,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:48:38,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:48:38,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:48:38,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-27 21:48:38,617 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:48:38,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:48:38,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1943098331, now seen corresponding path program 6 times [2024-06-27 21:48:38,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:48:38,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247864886] [2024-06-27 21:48:38,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:48:38,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:48:38,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:48:39,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:48:39,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:48:39,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247864886] [2024-06-27 21:48:39,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247864886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:48:39,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:48:39,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:48:39,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564111037] [2024-06-27 21:48:39,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:48:39,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:48:39,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:48:39,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:48:39,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:48:39,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:48:39,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 698 transitions, 10197 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:48:39,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:48:39,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:48:39,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:48:41,864 INFO L124 PetriNetUnfolderBase]: 4373/7282 cut-off events. [2024-06-27 21:48:41,864 INFO L125 PetriNetUnfolderBase]: For 1551066/1551066 co-relation queries the response was YES. [2024-06-27 21:48:41,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75257 conditions, 7282 events. 4373/7282 cut-off events. For 1551066/1551066 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 50053 event pairs, 810 based on Foata normal form. 1/7272 useless extension candidates. Maximal degree in co-relation 75003. Up to 6464 conditions per place. [2024-06-27 21:48:41,995 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 591 selfloop transitions, 118 changer transitions 0/716 dead transitions. [2024-06-27 21:48:41,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 716 transitions, 11800 flow [2024-06-27 21:48:41,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:48:41,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:48:41,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-27 21:48:41,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47883597883597884 [2024-06-27 21:48:41,996 INFO L175 Difference]: Start difference. First operand has 540 places, 698 transitions, 10197 flow. Second operand 9 states and 181 transitions. [2024-06-27 21:48:41,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 716 transitions, 11800 flow [2024-06-27 21:48:52,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 716 transitions, 11534 flow, removed 85 selfloop flow, removed 4 redundant places. [2024-06-27 21:48:52,972 INFO L231 Difference]: Finished difference. Result has 545 places, 702 transitions, 10331 flow [2024-06-27 21:48:52,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9961, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10331, PETRI_PLACES=545, PETRI_TRANSITIONS=702} [2024-06-27 21:48:52,972 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 502 predicate places. [2024-06-27 21:48:52,972 INFO L495 AbstractCegarLoop]: Abstraction has has 545 places, 702 transitions, 10331 flow [2024-06-27 21:48:52,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:48:52,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:48:52,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:48:52,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-27 21:48:52,973 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:48:52,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:48:52,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1998697079, now seen corresponding path program 7 times [2024-06-27 21:48:52,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:48:52,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280005569] [2024-06-27 21:48:52,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:48:52,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:48:52,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:48:53,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:48:53,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:48:53,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280005569] [2024-06-27 21:48:53,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280005569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:48:53,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:48:53,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:48:53,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462711527] [2024-06-27 21:48:53,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:48:53,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:48:53,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:48:53,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:48:53,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:48:53,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:48:53,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 702 transitions, 10331 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:48:53,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:48:53,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:48:53,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:48:56,168 INFO L124 PetriNetUnfolderBase]: 4383/7302 cut-off events. [2024-06-27 21:48:56,169 INFO L125 PetriNetUnfolderBase]: For 1570396/1570396 co-relation queries the response was YES. [2024-06-27 21:48:56,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76121 conditions, 7302 events. 4383/7302 cut-off events. For 1570396/1570396 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 50279 event pairs, 810 based on Foata normal form. 1/7292 useless extension candidates. Maximal degree in co-relation 75865. Up to 6440 conditions per place. [2024-06-27 21:48:56,302 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 572 selfloop transitions, 143 changer transitions 0/722 dead transitions. [2024-06-27 21:48:56,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 722 transitions, 11932 flow [2024-06-27 21:48:56,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:48:56,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:48:56,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-27 21:48:56,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-27 21:48:56,303 INFO L175 Difference]: Start difference. First operand has 545 places, 702 transitions, 10331 flow. Second operand 9 states and 182 transitions. [2024-06-27 21:48:56,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 722 transitions, 11932 flow [2024-06-27 21:49:07,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 548 places, 722 transitions, 11665 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-27 21:49:07,914 INFO L231 Difference]: Finished difference. Result has 550 places, 708 transitions, 10543 flow [2024-06-27 21:49:07,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10064, PETRI_DIFFERENCE_MINUEND_PLACES=540, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10543, PETRI_PLACES=550, PETRI_TRANSITIONS=708} [2024-06-27 21:49:07,914 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 507 predicate places. [2024-06-27 21:49:07,914 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 708 transitions, 10543 flow [2024-06-27 21:49:07,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:49:07,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:49:07,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:49:07,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-27 21:49:07,915 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:49:07,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:49:07,915 INFO L85 PathProgramCache]: Analyzing trace with hash 185440637, now seen corresponding path program 8 times [2024-06-27 21:49:07,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:49:07,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392641001] [2024-06-27 21:49:07,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:49:07,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:49:07,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:49:08,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:49:08,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:49:08,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392641001] [2024-06-27 21:49:08,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392641001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:49:08,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:49:08,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:49:08,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364819595] [2024-06-27 21:49:08,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:49:08,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:49:08,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:49:08,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:49:08,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:49:08,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:49:08,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 708 transitions, 10543 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:49:08,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:49:08,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:49:08,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:49:11,243 INFO L124 PetriNetUnfolderBase]: 4380/7296 cut-off events. [2024-06-27 21:49:11,244 INFO L125 PetriNetUnfolderBase]: For 1577826/1577826 co-relation queries the response was YES. [2024-06-27 21:49:11,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76597 conditions, 7296 events. 4380/7296 cut-off events. For 1577826/1577826 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 50270 event pairs, 810 based on Foata normal form. 1/7286 useless extension candidates. Maximal degree in co-relation 76339. Up to 6528 conditions per place. [2024-06-27 21:49:11,378 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 631 selfloop transitions, 84 changer transitions 0/722 dead transitions. [2024-06-27 21:49:11,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 722 transitions, 12011 flow [2024-06-27 21:49:11,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:49:11,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:49:11,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 21:49:11,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-27 21:49:11,379 INFO L175 Difference]: Start difference. First operand has 550 places, 708 transitions, 10543 flow. Second operand 9 states and 175 transitions. [2024-06-27 21:49:11,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 722 transitions, 12011 flow