./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix033_power.oepc_pso.oepc_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix033_power.oepc_pso.oepc_rmo.oepc.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/mix033_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/mix033_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 18:28:05,579 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 18:28:05,691 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 18:28:05,694 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 18:28:05,694 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 18:28:05,707 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 18:28:05,708 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 18:28:05,708 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 18:28:05,708 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 18:28:05,709 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 18:28:05,709 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 18:28:05,709 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 18:28:05,709 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 18:28:05,710 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 18:28:05,710 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 18:28:05,710 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 18:28:05,710 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 18:28:05,711 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 18:28:05,711 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 18:28:05,711 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 18:28:05,711 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 18:28:05,714 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 18:28:05,714 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 18:28:05,715 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 18:28:05,716 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 18:28:05,716 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 18:28:05,716 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 18:28:05,717 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 18:28:05,717 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 18:28:05,717 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 18:28:05,718 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 18:28:05,718 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 18:28:05,718 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:28:05,719 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 18:28:05,719 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 18:28:05,719 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 18:28:05,719 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 18:28:05,719 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 18:28:05,719 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 18:28:05,719 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 18:28:05,719 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 18:28:05,720 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 18:28:05,720 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 18:28:05,720 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 18:28:05,913 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 18:28:05,935 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 18:28:05,937 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 18:28:05,938 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 18:28:05,938 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 18:28:05,939 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix033_power.oepc_pso.oepc_rmo.oepc.i [2024-06-27 18:28:06,917 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 18:28:07,148 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 18:28:07,149 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix033_power.oepc_pso.oepc_rmo.oepc.i [2024-06-27 18:28:07,167 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5061cfc8a/dea4b5c23c4e409ba2cfeec20f2b04b2/FLAGe6fe828b0 [2024-06-27 18:28:07,181 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5061cfc8a/dea4b5c23c4e409ba2cfeec20f2b04b2 [2024-06-27 18:28:07,183 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 18:28:07,183 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 18:28:07,185 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix033_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-27 18:28:07,319 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 18:28:07,322 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 18:28:07,324 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 18:28:07,324 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 18:28:07,327 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 18:28:07,328 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:28:07" (1/2) ... [2024-06-27 18:28:07,328 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d9813af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:28:07, skipping insertion in model container [2024-06-27 18:28:07,329 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:28:07" (1/2) ... [2024-06-27 18:28:07,330 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@40237cc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:28:07, skipping insertion in model container [2024-06-27 18:28:07,330 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:28:07" (2/2) ... [2024-06-27 18:28:07,331 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d9813af and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:28:07, skipping insertion in model container [2024-06-27 18:28:07,331 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:28:07" (2/2) ... [2024-06-27 18:28:07,331 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 18:28:07,401 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 18:28:07,402 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] (((((((((((((((((((((! multithreaded || b$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (b$mem_tmp == 0 || b$mem_tmp == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || b$flush_delayed == (_Bool)0)) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (b$w_buff1 == 0 || b$w_buff1 == 1))) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || (b$w_buff0 == 0 || b$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) [2024-06-27 18:28:07,402 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] (((((((((((((((((((((! multithreaded || b$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (b$mem_tmp == 0 || b$mem_tmp == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || b$flush_delayed == (_Bool)0)) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (b$w_buff1 == 0 || b$w_buff1 == 1))) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || (b$w_buff0 == 0 || b$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) [2024-06-27 18:28:07,402 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] (((((((((((((((((((((! multithreaded || b$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (b$mem_tmp == 0 || b$mem_tmp == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || b$flush_delayed == (_Bool)0)) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (b$w_buff1 == 0 || b$w_buff1 == 1))) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || (b$w_buff0 == 0 || b$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) [2024-06-27 18:28:07,402 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 18:28:07,402 INFO L106 edCorrectnessWitness]: ghost_update [L854-L854] multithreaded = 1; [2024-06-27 18:28:07,436 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 18:28:07,584 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix033_power.oepc_pso.oepc_rmo.oepc.i[969,982] [2024-06-27 18:28:07,762 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:28:07,775 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 18:28:07,805 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix033_power.oepc_pso.oepc_rmo.oepc.i[969,982] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 18:28:07,866 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:28:07,920 INFO L206 MainTranslator]: Completed translation [2024-06-27 18:28:07,920 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:28:07 WrapperNode [2024-06-27 18:28:07,920 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 18:28:07,921 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 18:28:07,922 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 18:28:07,922 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 18:28:07,927 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 06:28:07" (1/1) ... [2024-06-27 18:28:07,952 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 06:28:07" (1/1) ... [2024-06-27 18:28:07,978 INFO L138 Inliner]: procedures = 175, calls = 50, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 125 [2024-06-27 18:28:07,979 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 18:28:07,980 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 18:28:07,983 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 18:28:07,983 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 18:28:07,991 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 06:28:07" (1/1) ... [2024-06-27 18:28:07,992 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 06:28:07" (1/1) ... [2024-06-27 18:28:08,007 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 06:28:07" (1/1) ... [2024-06-27 18:28:08,023 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 18:28:08,023 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 06:28:07" (1/1) ... [2024-06-27 18:28:08,023 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 06:28:07" (1/1) ... [2024-06-27 18:28:08,031 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 06:28:07" (1/1) ... [2024-06-27 18:28:08,033 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 06:28:07" (1/1) ... [2024-06-27 18:28:08,034 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 06:28:07" (1/1) ... [2024-06-27 18:28:08,035 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 06:28:07" (1/1) ... [2024-06-27 18:28:08,038 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 18:28:08,038 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 18:28:08,038 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 18:28:08,038 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 18:28:08,039 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 06:28:07" (1/1) ... [2024-06-27 18:28:08,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:28:08,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:28:08,060 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 18:28:08,075 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 18:28:08,100 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 18:28:08,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 18:28:08,101 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 18:28:08,101 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 18:28:08,101 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 18:28:08,102 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 18:28:08,102 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 18:28:08,102 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 18:28:08,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 18:28:08,102 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 18:28:08,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 18:28:08,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 18:28:08,104 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 18:28:08,215 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 18:28:08,217 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 18:28:08,568 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 18:28:08,568 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 18:28:08,704 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 18:28:08,704 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 18:28:08,704 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:28:08 BoogieIcfgContainer [2024-06-27 18:28:08,704 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 18:28:08,706 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 18:28:08,706 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 18:28:08,709 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 18:28:08,709 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 06:28:07" (1/4) ... [2024-06-27 18:28:08,709 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7776585e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:28:08, skipping insertion in model container [2024-06-27 18:28:08,710 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:28:07" (2/4) ... [2024-06-27 18:28:08,710 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7776585e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:28:08, skipping insertion in model container [2024-06-27 18:28:08,710 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 06:28:07" (3/4) ... [2024-06-27 18:28:08,710 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7776585e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:28:08, skipping insertion in model container [2024-06-27 18:28:08,710 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:28:08" (4/4) ... [2024-06-27 18:28:08,711 INFO L112 eAbstractionObserver]: Analyzing ICFG mix033_power.oepc_pso.oepc_rmo.oepc.i [2024-06-27 18:28:08,724 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 18:28:08,724 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-06-27 18:28:08,725 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 18:28:08,758 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 18:28:08,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 50 transitions, 112 flow [2024-06-27 18:28:08,802 INFO L124 PetriNetUnfolderBase]: 1/47 cut-off events. [2024-06-27 18:28:08,803 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:28:08,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57 conditions, 47 events. 1/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 85 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2024-06-27 18:28:08,806 INFO L82 GeneralOperation]: Start removeDead. Operand has 59 places, 50 transitions, 112 flow [2024-06-27 18:28:08,808 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 47 transitions, 103 flow [2024-06-27 18:28:08,815 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 18:28:08,820 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;@3a0c5710, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 18:28:08,820 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-06-27 18:28:08,823 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 18:28:08,823 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 18:28:08,823 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:28:08,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:08,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 18:28:08,824 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:08,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:08,828 INFO L85 PathProgramCache]: Analyzing trace with hash 350216843, now seen corresponding path program 1 times [2024-06-27 18:28:08,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:08,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653087805] [2024-06-27 18:28:08,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:08,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:08,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:09,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:09,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:09,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653087805] [2024-06-27 18:28:09,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653087805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:09,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:09,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 18:28:09,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518465243] [2024-06-27 18:28:09,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:09,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:28:09,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:09,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:28:09,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:28:09,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-27 18:28:09,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 47 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:09,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:09,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-27 18:28:09,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:10,645 INFO L124 PetriNetUnfolderBase]: 5249/8503 cut-off events. [2024-06-27 18:28:10,646 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-06-27 18:28:10,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16109 conditions, 8503 events. 5249/8503 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 57003 event pairs, 4143 based on Foata normal form. 253/8057 useless extension candidates. Maximal degree in co-relation 16097. Up to 7489 conditions per place. [2024-06-27 18:28:10,697 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 43 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2024-06-27 18:28:10,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 61 transitions, 233 flow [2024-06-27 18:28:10,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:28:10,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:28:10,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2024-06-27 18:28:10,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6733333333333333 [2024-06-27 18:28:10,708 INFO L175 Difference]: Start difference. First operand has 56 places, 47 transitions, 103 flow. Second operand 3 states and 101 transitions. [2024-06-27 18:28:10,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 61 transitions, 233 flow [2024-06-27 18:28:10,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 61 transitions, 228 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 18:28:10,715 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 135 flow [2024-06-27 18:28:10,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2024-06-27 18:28:10,721 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 0 predicate places. [2024-06-27 18:28:10,721 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 135 flow [2024-06-27 18:28:10,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:10,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:10,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 18:28:10,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 18:28:10,722 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P0Err0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:10,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:10,723 INFO L85 PathProgramCache]: Analyzing trace with hash 350218180, now seen corresponding path program 1 times [2024-06-27 18:28:10,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:10,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729820127] [2024-06-27 18:28:10,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:10,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:10,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:10,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:10,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:10,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729820127] [2024-06-27 18:28:10,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729820127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:10,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:10,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 18:28:10,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118935664] [2024-06-27 18:28:10,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:10,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:28:10,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:10,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:28:10,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:28:10,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 50 [2024-06-27 18:28:10,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:10,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:10,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 50 [2024-06-27 18:28:10,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:11,100 INFO L124 PetriNetUnfolderBase]: 996/1923 cut-off events. [2024-06-27 18:28:11,100 INFO L125 PetriNetUnfolderBase]: For 157/157 co-relation queries the response was YES. [2024-06-27 18:28:11,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3687 conditions, 1923 events. 996/1923 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 13105 event pairs, 655 based on Foata normal form. 0/1777 useless extension candidates. Maximal degree in co-relation 3675. Up to 1277 conditions per place. [2024-06-27 18:28:11,108 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 35 selfloop transitions, 3 changer transitions 0/64 dead transitions. [2024-06-27 18:28:11,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 64 transitions, 238 flow [2024-06-27 18:28:11,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:28:11,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:28:11,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 119 transitions. [2024-06-27 18:28:11,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7933333333333333 [2024-06-27 18:28:11,110 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 135 flow. Second operand 3 states and 119 transitions. [2024-06-27 18:28:11,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 64 transitions, 238 flow [2024-06-27 18:28:11,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 64 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:28:11,112 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 128 flow [2024-06-27 18:28:11,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2024-06-27 18:28:11,113 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 0 predicate places. [2024-06-27 18:28:11,113 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 128 flow [2024-06-27 18:28:11,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:11,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:11,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:11,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 18:28:11,114 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:11,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:11,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1550951497, now seen corresponding path program 1 times [2024-06-27 18:28:11,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:11,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596855816] [2024-06-27 18:28:11,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:11,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:11,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:11,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:11,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:11,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596855816] [2024-06-27 18:28:11,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596855816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:11,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:11,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 18:28:11,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328766296] [2024-06-27 18:28:11,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:11,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:28:11,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:11,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:28:11,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:28:11,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-27 18:28:11,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:11,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:11,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-27 18:28:11,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:12,376 INFO L124 PetriNetUnfolderBase]: 4457/7227 cut-off events. [2024-06-27 18:28:12,376 INFO L125 PetriNetUnfolderBase]: For 1626/1626 co-relation queries the response was YES. [2024-06-27 18:28:12,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15202 conditions, 7227 events. 4457/7227 cut-off events. For 1626/1626 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 46532 event pairs, 3358 based on Foata normal form. 3/6961 useless extension candidates. Maximal degree in co-relation 15189. Up to 6358 conditions per place. [2024-06-27 18:28:12,415 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 51 selfloop transitions, 8 changer transitions 2/74 dead transitions. [2024-06-27 18:28:12,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 74 transitions, 322 flow [2024-06-27 18:28:12,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:28:12,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:28:12,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2024-06-27 18:28:12,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 18:28:12,420 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 128 flow. Second operand 4 states and 125 transitions. [2024-06-27 18:28:12,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 74 transitions, 322 flow [2024-06-27 18:28:12,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 74 transitions, 314 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 18:28:12,423 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 189 flow [2024-06-27 18:28:12,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=189, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2024-06-27 18:28:12,424 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 3 predicate places. [2024-06-27 18:28:12,424 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 189 flow [2024-06-27 18:28:12,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:12,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:12,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:12,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 18:28:12,425 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:12,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:12,426 INFO L85 PathProgramCache]: Analyzing trace with hash 834856694, now seen corresponding path program 1 times [2024-06-27 18:28:12,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:12,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437184652] [2024-06-27 18:28:12,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:12,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:12,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:13,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:13,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:13,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437184652] [2024-06-27 18:28:13,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437184652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:13,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:13,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 18:28:13,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968864916] [2024-06-27 18:28:13,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:13,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 18:28:13,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:13,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 18:28:13,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 18:28:13,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-27 18:28:13,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 189 flow. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:13,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:13,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-27 18:28:13,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:13,676 INFO L124 PetriNetUnfolderBase]: 3850/6375 cut-off events. [2024-06-27 18:28:13,676 INFO L125 PetriNetUnfolderBase]: For 2630/2630 co-relation queries the response was YES. [2024-06-27 18:28:13,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14448 conditions, 6375 events. 3850/6375 cut-off events. For 2630/2630 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 41252 event pairs, 2342 based on Foata normal form. 5/6160 useless extension candidates. Maximal degree in co-relation 14433. Up to 5419 conditions per place. [2024-06-27 18:28:13,710 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 67 selfloop transitions, 18 changer transitions 0/98 dead transitions. [2024-06-27 18:28:13,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 98 transitions, 501 flow [2024-06-27 18:28:13,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:28:13,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:28:13,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2024-06-27 18:28:13,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-06-27 18:28:13,712 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 189 flow. Second operand 5 states and 160 transitions. [2024-06-27 18:28:13,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 98 transitions, 501 flow [2024-06-27 18:28:13,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 98 transitions, 490 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-27 18:28:13,717 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 303 flow [2024-06-27 18:28:13,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=303, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2024-06-27 18:28:13,717 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 8 predicate places. [2024-06-27 18:28:13,718 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 303 flow [2024-06-27 18:28:13,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:13,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:13,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:13,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 18:28:13,718 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:13,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:13,719 INFO L85 PathProgramCache]: Analyzing trace with hash 110754312, now seen corresponding path program 1 times [2024-06-27 18:28:13,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:13,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130304933] [2024-06-27 18:28:13,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:13,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:13,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:14,567 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 18:28:14,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:14,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130304933] [2024-06-27 18:28:14,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130304933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:14,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:14,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:28:14,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330266201] [2024-06-27 18:28:14,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:14,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:28:14,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:14,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:28:14,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:28:14,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-27 18:28:14,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 303 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:14,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:14,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-27 18:28:14,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:15,368 INFO L124 PetriNetUnfolderBase]: 3872/6416 cut-off events. [2024-06-27 18:28:15,368 INFO L125 PetriNetUnfolderBase]: For 6493/6496 co-relation queries the response was YES. [2024-06-27 18:28:15,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16811 conditions, 6416 events. 3872/6416 cut-off events. For 6493/6496 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 41546 event pairs, 2025 based on Foata normal form. 7/6200 useless extension candidates. Maximal degree in co-relation 16792. Up to 5385 conditions per place. [2024-06-27 18:28:15,404 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 79 selfloop transitions, 33 changer transitions 0/125 dead transitions. [2024-06-27 18:28:15,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 125 transitions, 759 flow [2024-06-27 18:28:15,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:28:15,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:28:15,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2024-06-27 18:28:15,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366666666666667 [2024-06-27 18:28:15,406 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 303 flow. Second operand 6 states and 191 transitions. [2024-06-27 18:28:15,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 125 transitions, 759 flow [2024-06-27 18:28:15,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 125 transitions, 751 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-27 18:28:15,415 INFO L231 Difference]: Finished difference. Result has 73 places, 81 transitions, 513 flow [2024-06-27 18:28:15,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=513, PETRI_PLACES=73, PETRI_TRANSITIONS=81} [2024-06-27 18:28:15,416 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 17 predicate places. [2024-06-27 18:28:15,416 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 81 transitions, 513 flow [2024-06-27 18:28:15,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:15,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:15,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:15,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 18:28:15,417 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:15,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:15,418 INFO L85 PathProgramCache]: Analyzing trace with hash -861583019, now seen corresponding path program 1 times [2024-06-27 18:28:15,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:15,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262672660] [2024-06-27 18:28:15,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:15,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:15,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:16,455 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 18:28:16,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:16,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262672660] [2024-06-27 18:28:16,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262672660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:16,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:16,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:28:16,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986841426] [2024-06-27 18:28:16,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:16,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:28:16,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:16,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:28:16,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:28:16,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-27 18:28:16,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 81 transitions, 513 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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 18:28:16,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:16,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-27 18:28:16,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:17,359 INFO L124 PetriNetUnfolderBase]: 3899/5967 cut-off events. [2024-06-27 18:28:17,360 INFO L125 PetriNetUnfolderBase]: For 12880/12886 co-relation queries the response was YES. [2024-06-27 18:28:17,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19103 conditions, 5967 events. 3899/5967 cut-off events. For 12880/12886 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 35166 event pairs, 1092 based on Foata normal form. 14/5888 useless extension candidates. Maximal degree in co-relation 19078. Up to 5350 conditions per place. [2024-06-27 18:28:17,389 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 86 selfloop transitions, 36 changer transitions 0/135 dead transitions. [2024-06-27 18:28:17,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 135 transitions, 955 flow [2024-06-27 18:28:17,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:28:17,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:28:17,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 217 transitions. [2024-06-27 18:28:17,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-27 18:28:17,391 INFO L175 Difference]: Start difference. First operand has 73 places, 81 transitions, 513 flow. Second operand 7 states and 217 transitions. [2024-06-27 18:28:17,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 135 transitions, 955 flow [2024-06-27 18:28:17,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 135 transitions, 921 flow, removed 17 selfloop flow, removed 0 redundant places. [2024-06-27 18:28:17,399 INFO L231 Difference]: Finished difference. Result has 79 places, 83 transitions, 583 flow [2024-06-27 18:28:17,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=583, PETRI_PLACES=79, PETRI_TRANSITIONS=83} [2024-06-27 18:28:17,400 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 23 predicate places. [2024-06-27 18:28:17,400 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 83 transitions, 583 flow [2024-06-27 18:28:17,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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 18:28:17,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:17,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:17,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 18:28:17,401 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:17,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:17,401 INFO L85 PathProgramCache]: Analyzing trace with hash -898401476, now seen corresponding path program 1 times [2024-06-27 18:28:17,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:17,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112954852] [2024-06-27 18:28:17,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:17,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:17,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:17,914 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 18:28:17,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:17,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112954852] [2024-06-27 18:28:17,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112954852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:17,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:17,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:28:17,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815775564] [2024-06-27 18:28:17,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:17,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:28:17,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:17,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:28:17,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:28:17,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 18:28:17,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 83 transitions, 583 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:17,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:17,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 18:28:17,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:18,773 INFO L124 PetriNetUnfolderBase]: 4541/7443 cut-off events. [2024-06-27 18:28:18,773 INFO L125 PetriNetUnfolderBase]: For 16242/16242 co-relation queries the response was YES. [2024-06-27 18:28:18,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22509 conditions, 7443 events. 4541/7443 cut-off events. For 16242/16242 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 48528 event pairs, 1945 based on Foata normal form. 2/7196 useless extension candidates. Maximal degree in co-relation 22480. Up to 6479 conditions per place. [2024-06-27 18:28:18,820 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 75 selfloop transitions, 14 changer transitions 0/100 dead transitions. [2024-06-27 18:28:18,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 100 transitions, 801 flow [2024-06-27 18:28:18,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:28:18,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:28:18,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-27 18:28:18,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516 [2024-06-27 18:28:18,822 INFO L175 Difference]: Start difference. First operand has 79 places, 83 transitions, 583 flow. Second operand 5 states and 129 transitions. [2024-06-27 18:28:18,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 100 transitions, 801 flow [2024-06-27 18:28:18,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 100 transitions, 711 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 18:28:18,834 INFO L231 Difference]: Finished difference. Result has 79 places, 83 transitions, 533 flow [2024-06-27 18:28:18,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=533, PETRI_PLACES=79, PETRI_TRANSITIONS=83} [2024-06-27 18:28:18,835 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 23 predicate places. [2024-06-27 18:28:18,835 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 83 transitions, 533 flow [2024-06-27 18:28:18,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:18,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:18,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:18,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 18:28:18,836 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:18,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:18,836 INFO L85 PathProgramCache]: Analyzing trace with hash -2100042761, now seen corresponding path program 1 times [2024-06-27 18:28:18,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:18,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791250836] [2024-06-27 18:28:18,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:18,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:18,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:19,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:19,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:19,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791250836] [2024-06-27 18:28:19,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791250836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:19,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:19,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:28:19,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529798868] [2024-06-27 18:28:19,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:19,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:28:19,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:19,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:28:19,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:28:19,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:28:19,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 83 transitions, 533 flow. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:19,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:19,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:28:19,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:20,625 INFO L124 PetriNetUnfolderBase]: 5329/8698 cut-off events. [2024-06-27 18:28:20,625 INFO L125 PetriNetUnfolderBase]: For 19026/19026 co-relation queries the response was YES. [2024-06-27 18:28:20,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25623 conditions, 8698 events. 5329/8698 cut-off events. For 19026/19026 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 57105 event pairs, 2333 based on Foata normal form. 2/8474 useless extension candidates. Maximal degree in co-relation 25592. Up to 7566 conditions per place. [2024-06-27 18:28:20,740 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 84 selfloop transitions, 17 changer transitions 0/111 dead transitions. [2024-06-27 18:28:20,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 111 transitions, 817 flow [2024-06-27 18:28:20,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:28:20,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:28:20,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-27 18:28:20,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49666666666666665 [2024-06-27 18:28:20,744 INFO L175 Difference]: Start difference. First operand has 79 places, 83 transitions, 533 flow. Second operand 6 states and 149 transitions. [2024-06-27 18:28:20,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 111 transitions, 817 flow [2024-06-27 18:28:20,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 111 transitions, 778 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 18:28:20,758 INFO L231 Difference]: Finished difference. Result has 81 places, 86 transitions, 563 flow [2024-06-27 18:28:20,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=563, PETRI_PLACES=81, PETRI_TRANSITIONS=86} [2024-06-27 18:28:20,760 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 25 predicate places. [2024-06-27 18:28:20,760 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 86 transitions, 563 flow [2024-06-27 18:28:20,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:20,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:20,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:20,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 18:28:20,761 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:20,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:20,762 INFO L85 PathProgramCache]: Analyzing trace with hash -82728978, now seen corresponding path program 1 times [2024-06-27 18:28:20,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:20,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336024651] [2024-06-27 18:28:20,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:20,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:20,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:21,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:21,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:21,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336024651] [2024-06-27 18:28:21,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336024651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:21,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:21,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:28:21,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83852522] [2024-06-27 18:28:21,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:21,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:28:21,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:21,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:28:21,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:28:21,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 18:28:21,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 86 transitions, 563 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:21,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:21,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 18:28:21,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:22,407 INFO L124 PetriNetUnfolderBase]: 5055/8259 cut-off events. [2024-06-27 18:28:22,407 INFO L125 PetriNetUnfolderBase]: For 23041/23050 co-relation queries the response was YES. [2024-06-27 18:28:22,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25881 conditions, 8259 events. 5055/8259 cut-off events. For 23041/23050 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 54059 event pairs, 1888 based on Foata normal form. 10/8043 useless extension candidates. Maximal degree in co-relation 25850. Up to 7103 conditions per place. [2024-06-27 18:28:22,467 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 86 selfloop transitions, 21 changer transitions 0/119 dead transitions. [2024-06-27 18:28:22,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 119 transitions, 915 flow [2024-06-27 18:28:22,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:28:22,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:28:22,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-27 18:28:22,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-06-27 18:28:22,469 INFO L175 Difference]: Start difference. First operand has 81 places, 86 transitions, 563 flow. Second operand 6 states and 162 transitions. [2024-06-27 18:28:22,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 119 transitions, 915 flow [2024-06-27 18:28:22,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 119 transitions, 874 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 18:28:22,483 INFO L231 Difference]: Finished difference. Result has 83 places, 89 transitions, 608 flow [2024-06-27 18:28:22,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=608, PETRI_PLACES=83, PETRI_TRANSITIONS=89} [2024-06-27 18:28:22,484 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 27 predicate places. [2024-06-27 18:28:22,484 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 89 transitions, 608 flow [2024-06-27 18:28:22,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:22,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:22,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:22,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 18:28:22,486 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:22,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:22,493 INFO L85 PathProgramCache]: Analyzing trace with hash -74939298, now seen corresponding path program 2 times [2024-06-27 18:28:22,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:22,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935960159] [2024-06-27 18:28:22,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:22,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:22,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:23,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:23,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:23,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935960159] [2024-06-27 18:28:23,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935960159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:23,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:23,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:28:23,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823891131] [2024-06-27 18:28:23,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:23,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:28:23,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:23,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:28:23,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:28:23,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 18:28:23,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 89 transitions, 608 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:23,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:23,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 18:28:23,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:24,122 INFO L124 PetriNetUnfolderBase]: 5049/8383 cut-off events. [2024-06-27 18:28:24,122 INFO L125 PetriNetUnfolderBase]: For 25554/25554 co-relation queries the response was YES. [2024-06-27 18:28:24,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26373 conditions, 8383 events. 5049/8383 cut-off events. For 25554/25554 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 56393 event pairs, 2133 based on Foata normal form. 2/8148 useless extension candidates. Maximal degree in co-relation 26341. Up to 7205 conditions per place. [2024-06-27 18:28:24,168 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 87 selfloop transitions, 13 changer transitions 0/112 dead transitions. [2024-06-27 18:28:24,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 112 transitions, 866 flow [2024-06-27 18:28:24,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:28:24,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:28:24,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-27 18:28:24,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5066666666666667 [2024-06-27 18:28:24,169 INFO L175 Difference]: Start difference. First operand has 83 places, 89 transitions, 608 flow. Second operand 6 states and 152 transitions. [2024-06-27 18:28:24,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 112 transitions, 866 flow [2024-06-27 18:28:24,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 112 transitions, 833 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 18:28:24,188 INFO L231 Difference]: Finished difference. Result has 86 places, 89 transitions, 609 flow [2024-06-27 18:28:24,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=609, PETRI_PLACES=86, PETRI_TRANSITIONS=89} [2024-06-27 18:28:24,189 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 30 predicate places. [2024-06-27 18:28:24,189 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 89 transitions, 609 flow [2024-06-27 18:28:24,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:24,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:24,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:24,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 18:28:24,190 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:24,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:24,190 INFO L85 PathProgramCache]: Analyzing trace with hash -94996081, now seen corresponding path program 1 times [2024-06-27 18:28:24,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:24,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852405421] [2024-06-27 18:28:24,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:24,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:24,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:24,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:24,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:24,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852405421] [2024-06-27 18:28:24,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852405421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:24,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:24,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:28:24,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835941096] [2024-06-27 18:28:24,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:24,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:28:24,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:24,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:28:24,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:28:25,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:28:25,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 89 transitions, 609 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:25,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:25,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:28:25,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:26,061 INFO L124 PetriNetUnfolderBase]: 5322/8653 cut-off events. [2024-06-27 18:28:26,061 INFO L125 PetriNetUnfolderBase]: For 28247/28247 co-relation queries the response was YES. [2024-06-27 18:28:26,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27419 conditions, 8653 events. 5322/8653 cut-off events. For 28247/28247 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 56591 event pairs, 2229 based on Foata normal form. 4/8428 useless extension candidates. Maximal degree in co-relation 27386. Up to 7518 conditions per place. [2024-06-27 18:28:26,110 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 96 selfloop transitions, 20 changer transitions 0/126 dead transitions. [2024-06-27 18:28:26,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 126 transitions, 951 flow [2024-06-27 18:28:26,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:28:26,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:28:26,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 18:28:26,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49714285714285716 [2024-06-27 18:28:26,111 INFO L175 Difference]: Start difference. First operand has 86 places, 89 transitions, 609 flow. Second operand 7 states and 174 transitions. [2024-06-27 18:28:26,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 126 transitions, 951 flow [2024-06-27 18:28:26,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 126 transitions, 895 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 18:28:26,131 INFO L231 Difference]: Finished difference. Result has 87 places, 92 transitions, 631 flow [2024-06-27 18:28:26,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=631, PETRI_PLACES=87, PETRI_TRANSITIONS=92} [2024-06-27 18:28:26,132 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 31 predicate places. [2024-06-27 18:28:26,132 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 92 transitions, 631 flow [2024-06-27 18:28:26,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:26,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:26,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:26,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 18:28:26,133 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:26,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:26,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1880171565, now seen corresponding path program 1 times [2024-06-27 18:28:26,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:26,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016407794] [2024-06-27 18:28:26,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:26,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:26,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:26,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:26,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:26,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016407794] [2024-06-27 18:28:26,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016407794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:26,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:26,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:28:26,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088534581] [2024-06-27 18:28:26,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:26,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:28:26,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:26,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:28:26,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:28:26,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:28:26,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 92 transitions, 631 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:26,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:26,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:28:26,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:27,797 INFO L124 PetriNetUnfolderBase]: 5378/8649 cut-off events. [2024-06-27 18:28:27,798 INFO L125 PetriNetUnfolderBase]: For 33098/33104 co-relation queries the response was YES. [2024-06-27 18:28:27,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28822 conditions, 8649 events. 5378/8649 cut-off events. For 33098/33104 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 55376 event pairs, 1951 based on Foata normal form. 8/8426 useless extension candidates. Maximal degree in co-relation 28789. Up to 7422 conditions per place. [2024-06-27 18:28:27,850 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 103 selfloop transitions, 29 changer transitions 0/142 dead transitions. [2024-06-27 18:28:27,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 142 transitions, 1118 flow [2024-06-27 18:28:27,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:28:27,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:28:27,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-27 18:28:27,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257142857142857 [2024-06-27 18:28:27,852 INFO L175 Difference]: Start difference. First operand has 87 places, 92 transitions, 631 flow. Second operand 7 states and 184 transitions. [2024-06-27 18:28:27,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 142 transitions, 1118 flow [2024-06-27 18:28:27,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 142 transitions, 1061 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 18:28:27,874 INFO L231 Difference]: Finished difference. Result has 90 places, 103 transitions, 745 flow [2024-06-27 18:28:27,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=579, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=745, PETRI_PLACES=90, PETRI_TRANSITIONS=103} [2024-06-27 18:28:27,875 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 34 predicate places. [2024-06-27 18:28:27,875 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 103 transitions, 745 flow [2024-06-27 18:28:27,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:27,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:27,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:27,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 18:28:27,875 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:27,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:27,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1971850867, now seen corresponding path program 2 times [2024-06-27 18:28:27,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:27,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601772544] [2024-06-27 18:28:27,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:27,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:27,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:28,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:28,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:28,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601772544] [2024-06-27 18:28:28,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601772544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:28,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:28,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:28:28,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276333724] [2024-06-27 18:28:28,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:28,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:28:28,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:28,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:28:28,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:28:28,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:28:28,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 103 transitions, 745 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:28,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:28,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:28:28,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:29,650 INFO L124 PetriNetUnfolderBase]: 5401/8825 cut-off events. [2024-06-27 18:28:29,651 INFO L125 PetriNetUnfolderBase]: For 40449/40449 co-relation queries the response was YES. [2024-06-27 18:28:29,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31047 conditions, 8825 events. 5401/8825 cut-off events. For 40449/40449 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 58109 event pairs, 2197 based on Foata normal form. 2/8594 useless extension candidates. Maximal degree in co-relation 31012. Up to 7623 conditions per place. [2024-06-27 18:28:29,695 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 110 selfloop transitions, 22 changer transitions 0/142 dead transitions. [2024-06-27 18:28:29,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 142 transitions, 1201 flow [2024-06-27 18:28:29,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:28:29,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:28:29,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 18:28:29,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 18:28:29,697 INFO L175 Difference]: Start difference. First operand has 90 places, 103 transitions, 745 flow. Second operand 7 states and 175 transitions. [2024-06-27 18:28:29,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 142 transitions, 1201 flow [2024-06-27 18:28:29,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 142 transitions, 1173 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-27 18:28:29,722 INFO L231 Difference]: Finished difference. Result has 95 places, 109 transitions, 835 flow [2024-06-27 18:28:29,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=835, PETRI_PLACES=95, PETRI_TRANSITIONS=109} [2024-06-27 18:28:29,722 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 39 predicate places. [2024-06-27 18:28:29,722 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 109 transitions, 835 flow [2024-06-27 18:28:29,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:29,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:29,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:29,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 18:28:29,723 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:29,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:29,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1293705195, now seen corresponding path program 3 times [2024-06-27 18:28:29,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:29,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713107984] [2024-06-27 18:28:29,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:29,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:29,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:30,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:30,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:30,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713107984] [2024-06-27 18:28:30,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713107984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:30,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:30,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:28:30,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503284009] [2024-06-27 18:28:30,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:30,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:28:30,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:30,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:28:30,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:28:30,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:28:30,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 109 transitions, 835 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:30,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:30,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:28:30,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:31,681 INFO L124 PetriNetUnfolderBase]: 5396/8822 cut-off events. [2024-06-27 18:28:31,681 INFO L125 PetriNetUnfolderBase]: For 45409/45409 co-relation queries the response was YES. [2024-06-27 18:28:31,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31683 conditions, 8822 events. 5396/8822 cut-off events. For 45409/45409 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 57991 event pairs, 2199 based on Foata normal form. 2/8590 useless extension candidates. Maximal degree in co-relation 31645. Up to 7650 conditions per place. [2024-06-27 18:28:31,744 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 111 selfloop transitions, 17 changer transitions 0/138 dead transitions. [2024-06-27 18:28:31,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 138 transitions, 1165 flow [2024-06-27 18:28:31,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:28:31,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:28:31,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 18:28:31,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-06-27 18:28:31,747 INFO L175 Difference]: Start difference. First operand has 95 places, 109 transitions, 835 flow. Second operand 7 states and 170 transitions. [2024-06-27 18:28:31,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 138 transitions, 1165 flow [2024-06-27 18:28:31,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 138 transitions, 1109 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-27 18:28:31,784 INFO L231 Difference]: Finished difference. Result has 99 places, 109 transitions, 821 flow [2024-06-27 18:28:31,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=779, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=821, PETRI_PLACES=99, PETRI_TRANSITIONS=109} [2024-06-27 18:28:31,785 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 43 predicate places. [2024-06-27 18:28:31,785 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 109 transitions, 821 flow [2024-06-27 18:28:31,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:31,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:31,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:31,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 18:28:31,786 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:31,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:31,787 INFO L85 PathProgramCache]: Analyzing trace with hash -777105615, now seen corresponding path program 1 times [2024-06-27 18:28:31,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:31,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523027378] [2024-06-27 18:28:31,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:31,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:31,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:32,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:32,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:32,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523027378] [2024-06-27 18:28:32,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523027378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:32,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:32,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:28:32,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066315036] [2024-06-27 18:28:32,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:32,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:28:32,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:32,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:28:32,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:28:32,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:28:32,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 109 transitions, 821 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 18:28:32,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:32,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:28:32,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:33,414 INFO L124 PetriNetUnfolderBase]: 5913/9735 cut-off events. [2024-06-27 18:28:33,414 INFO L125 PetriNetUnfolderBase]: For 54571/54583 co-relation queries the response was YES. [2024-06-27 18:28:33,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34737 conditions, 9735 events. 5913/9735 cut-off events. For 54571/54583 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 65204 event pairs, 2501 based on Foata normal form. 1/9485 useless extension candidates. Maximal degree in co-relation 34698. Up to 8400 conditions per place. [2024-06-27 18:28:33,467 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 100 selfloop transitions, 11 changer transitions 0/127 dead transitions. [2024-06-27 18:28:33,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 127 transitions, 1111 flow [2024-06-27 18:28:33,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:28:33,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:28:33,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-27 18:28:33,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.484 [2024-06-27 18:28:33,469 INFO L175 Difference]: Start difference. First operand has 99 places, 109 transitions, 821 flow. Second operand 5 states and 121 transitions. [2024-06-27 18:28:33,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 127 transitions, 1111 flow [2024-06-27 18:28:33,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 127 transitions, 1062 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 18:28:33,498 INFO L231 Difference]: Finished difference. Result has 98 places, 112 transitions, 835 flow [2024-06-27 18:28:33,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=772, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=835, PETRI_PLACES=98, PETRI_TRANSITIONS=112} [2024-06-27 18:28:33,499 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 42 predicate places. [2024-06-27 18:28:33,499 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 112 transitions, 835 flow [2024-06-27 18:28:33,499 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 18:28:33,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:33,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:33,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 18:28:33,500 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:33,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:33,500 INFO L85 PathProgramCache]: Analyzing trace with hash 321478807, now seen corresponding path program 1 times [2024-06-27 18:28:33,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:33,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871856176] [2024-06-27 18:28:33,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:33,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:33,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:34,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:34,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:34,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871856176] [2024-06-27 18:28:34,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871856176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:34,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:34,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:28:34,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193533444] [2024-06-27 18:28:34,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:34,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:28:34,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:34,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:28:34,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:28:34,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 18:28:34,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 112 transitions, 835 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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 18:28:34,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:34,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 18:28:34,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:35,499 INFO L124 PetriNetUnfolderBase]: 5141/7946 cut-off events. [2024-06-27 18:28:35,499 INFO L125 PetriNetUnfolderBase]: For 53820/53826 co-relation queries the response was YES. [2024-06-27 18:28:35,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31377 conditions, 7946 events. 5141/7946 cut-off events. For 53820/53826 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 48426 event pairs, 1548 based on Foata normal form. 6/7907 useless extension candidates. Maximal degree in co-relation 31337. Up to 7073 conditions per place. [2024-06-27 18:28:35,546 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 107 selfloop transitions, 37 changer transitions 0/161 dead transitions. [2024-06-27 18:28:35,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 161 transitions, 1361 flow [2024-06-27 18:28:35,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:28:35,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:28:35,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-06-27 18:28:35,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457142857142857 [2024-06-27 18:28:35,548 INFO L175 Difference]: Start difference. First operand has 98 places, 112 transitions, 835 flow. Second operand 7 states and 191 transitions. [2024-06-27 18:28:35,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 161 transitions, 1361 flow [2024-06-27 18:28:35,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 161 transitions, 1322 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 18:28:35,575 INFO L231 Difference]: Finished difference. Result has 102 places, 118 transitions, 936 flow [2024-06-27 18:28:35,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=796, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=936, PETRI_PLACES=102, PETRI_TRANSITIONS=118} [2024-06-27 18:28:35,575 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 46 predicate places. [2024-06-27 18:28:35,575 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 118 transitions, 936 flow [2024-06-27 18:28:35,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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 18:28:35,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:35,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:35,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 18:28:35,576 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:35,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:35,576 INFO L85 PathProgramCache]: Analyzing trace with hash 321569017, now seen corresponding path program 2 times [2024-06-27 18:28:35,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:35,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366176103] [2024-06-27 18:28:35,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:35,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:35,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:36,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:36,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:36,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366176103] [2024-06-27 18:28:36,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366176103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:36,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:36,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:28:36,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432630309] [2024-06-27 18:28:36,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:36,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:28:36,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:36,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:28:36,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:28:36,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 18:28:36,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 118 transitions, 936 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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 18:28:36,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:36,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 18:28:36,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:37,539 INFO L124 PetriNetUnfolderBase]: 5141/7938 cut-off events. [2024-06-27 18:28:37,540 INFO L125 PetriNetUnfolderBase]: For 60543/60549 co-relation queries the response was YES. [2024-06-27 18:28:37,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32660 conditions, 7938 events. 5141/7938 cut-off events. For 60543/60549 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 48192 event pairs, 1544 based on Foata normal form. 6/7900 useless extension candidates. Maximal degree in co-relation 32619. Up to 7133 conditions per place. [2024-06-27 18:28:37,588 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 104 selfloop transitions, 38 changer transitions 0/159 dead transitions. [2024-06-27 18:28:37,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 159 transitions, 1372 flow [2024-06-27 18:28:37,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:28:37,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:28:37,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-27 18:28:37,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5314285714285715 [2024-06-27 18:28:37,589 INFO L175 Difference]: Start difference. First operand has 102 places, 118 transitions, 936 flow. Second operand 7 states and 186 transitions. [2024-06-27 18:28:37,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 159 transitions, 1372 flow [2024-06-27 18:28:37,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 159 transitions, 1304 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-27 18:28:37,631 INFO L231 Difference]: Finished difference. Result has 108 places, 122 transitions, 1038 flow [2024-06-27 18:28:37,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=870, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1038, PETRI_PLACES=108, PETRI_TRANSITIONS=122} [2024-06-27 18:28:37,632 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 52 predicate places. [2024-06-27 18:28:37,632 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 122 transitions, 1038 flow [2024-06-27 18:28:37,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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 18:28:37,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:37,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:37,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 18:28:37,632 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:37,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:37,633 INFO L85 PathProgramCache]: Analyzing trace with hash 325288242, now seen corresponding path program 1 times [2024-06-27 18:28:37,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:37,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558332878] [2024-06-27 18:28:37,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:37,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:37,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:38,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:38,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:38,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558332878] [2024-06-27 18:28:38,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558332878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:38,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:38,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:28:38,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083198571] [2024-06-27 18:28:38,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:38,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:28:38,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:38,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:28:38,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:28:38,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:28:38,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 122 transitions, 1038 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:38,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:38,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:28:38,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:39,550 INFO L124 PetriNetUnfolderBase]: 5439/8738 cut-off events. [2024-06-27 18:28:39,550 INFO L125 PetriNetUnfolderBase]: For 68075/68084 co-relation queries the response was YES. [2024-06-27 18:28:39,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35306 conditions, 8738 events. 5439/8738 cut-off events. For 68075/68084 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 55915 event pairs, 1908 based on Foata normal form. 8/8526 useless extension candidates. Maximal degree in co-relation 35261. Up to 7486 conditions per place. [2024-06-27 18:28:39,609 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 117 selfloop transitions, 39 changer transitions 0/166 dead transitions. [2024-06-27 18:28:39,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 166 transitions, 1558 flow [2024-06-27 18:28:39,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:28:39,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:28:39,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-27 18:28:39,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5342857142857143 [2024-06-27 18:28:39,611 INFO L175 Difference]: Start difference. First operand has 108 places, 122 transitions, 1038 flow. Second operand 7 states and 187 transitions. [2024-06-27 18:28:39,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 166 transitions, 1558 flow [2024-06-27 18:28:39,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 166 transitions, 1485 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 18:28:39,659 INFO L231 Difference]: Finished difference. Result has 111 places, 125 transitions, 1083 flow [2024-06-27 18:28:39,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=965, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1083, PETRI_PLACES=111, PETRI_TRANSITIONS=125} [2024-06-27 18:28:39,660 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 55 predicate places. [2024-06-27 18:28:39,660 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 125 transitions, 1083 flow [2024-06-27 18:28:39,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:39,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:39,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:39,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 18:28:39,661 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:39,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:39,661 INFO L85 PathProgramCache]: Analyzing trace with hash 325293822, now seen corresponding path program 2 times [2024-06-27 18:28:39,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:39,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403542918] [2024-06-27 18:28:39,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:39,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:39,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:40,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:40,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:40,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403542918] [2024-06-27 18:28:40,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403542918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:40,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:40,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:28:40,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852120392] [2024-06-27 18:28:40,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:40,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:28:40,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:40,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:28:40,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:28:40,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:28:40,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 125 transitions, 1083 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:40,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:40,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:28:40,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:41,490 INFO L124 PetriNetUnfolderBase]: 5462/8770 cut-off events. [2024-06-27 18:28:41,490 INFO L125 PetriNetUnfolderBase]: For 71911/71920 co-relation queries the response was YES. [2024-06-27 18:28:41,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35644 conditions, 8770 events. 5462/8770 cut-off events. For 71911/71920 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 56004 event pairs, 1908 based on Foata normal form. 8/8558 useless extension candidates. Maximal degree in co-relation 35598. Up to 7510 conditions per place. [2024-06-27 18:28:41,557 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 117 selfloop transitions, 39 changer transitions 0/166 dead transitions. [2024-06-27 18:28:41,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 166 transitions, 1605 flow [2024-06-27 18:28:41,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:28:41,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:28:41,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-27 18:28:41,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5228571428571429 [2024-06-27 18:28:41,559 INFO L175 Difference]: Start difference. First operand has 111 places, 125 transitions, 1083 flow. Second operand 7 states and 183 transitions. [2024-06-27 18:28:41,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 166 transitions, 1605 flow [2024-06-27 18:28:41,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 166 transitions, 1489 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 18:28:41,606 INFO L231 Difference]: Finished difference. Result has 113 places, 128 transitions, 1092 flow [2024-06-27 18:28:41,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=977, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1092, PETRI_PLACES=113, PETRI_TRANSITIONS=128} [2024-06-27 18:28:41,607 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 57 predicate places. [2024-06-27 18:28:41,607 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 128 transitions, 1092 flow [2024-06-27 18:28:41,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:41,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:41,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:41,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 18:28:41,608 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:41,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:41,608 INFO L85 PathProgramCache]: Analyzing trace with hash 325294039, now seen corresponding path program 1 times [2024-06-27 18:28:41,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:41,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808874457] [2024-06-27 18:28:41,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:41,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:41,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:42,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:42,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:42,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808874457] [2024-06-27 18:28:42,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808874457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:42,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:42,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:28:42,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744275553] [2024-06-27 18:28:42,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:42,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:28:42,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:42,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:28:42,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:28:42,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:28:42,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 128 transitions, 1092 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:42,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:42,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:28:42,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:43,581 INFO L124 PetriNetUnfolderBase]: 5620/8757 cut-off events. [2024-06-27 18:28:43,581 INFO L125 PetriNetUnfolderBase]: For 79587/79596 co-relation queries the response was YES. [2024-06-27 18:28:43,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36746 conditions, 8757 events. 5620/8757 cut-off events. For 79587/79596 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 54136 event pairs, 1702 based on Foata normal form. 10/8635 useless extension candidates. Maximal degree in co-relation 36699. Up to 7493 conditions per place. [2024-06-27 18:28:43,643 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 134 selfloop transitions, 44 changer transitions 0/188 dead transitions. [2024-06-27 18:28:43,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 188 transitions, 1748 flow [2024-06-27 18:28:43,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:28:43,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:28:43,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-27 18:28:43,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5325 [2024-06-27 18:28:43,645 INFO L175 Difference]: Start difference. First operand has 113 places, 128 transitions, 1092 flow. Second operand 8 states and 213 transitions. [2024-06-27 18:28:43,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 188 transitions, 1748 flow [2024-06-27 18:28:43,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 188 transitions, 1676 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 18:28:43,709 INFO L231 Difference]: Finished difference. Result has 118 places, 139 transitions, 1233 flow [2024-06-27 18:28:43,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1020, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1233, PETRI_PLACES=118, PETRI_TRANSITIONS=139} [2024-06-27 18:28:43,710 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 62 predicate places. [2024-06-27 18:28:43,710 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 139 transitions, 1233 flow [2024-06-27 18:28:43,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:43,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:43,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:43,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 18:28:43,710 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:43,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:43,711 INFO L85 PathProgramCache]: Analyzing trace with hash 609957753, now seen corresponding path program 2 times [2024-06-27 18:28:43,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:43,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926790986] [2024-06-27 18:28:43,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:43,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:43,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:44,514 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 18:28:44,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:44,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926790986] [2024-06-27 18:28:44,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926790986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:44,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:44,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:28:44,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087956824] [2024-06-27 18:28:44,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:44,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:28:44,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:44,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:28:44,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:28:44,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:28:44,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 139 transitions, 1233 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:44,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:44,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:28:44,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:45,639 INFO L124 PetriNetUnfolderBase]: 5666/8899 cut-off events. [2024-06-27 18:28:45,639 INFO L125 PetriNetUnfolderBase]: For 91973/91973 co-relation queries the response was YES. [2024-06-27 18:28:45,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39572 conditions, 8899 events. 5666/8899 cut-off events. For 91973/91973 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 55850 event pairs, 2032 based on Foata normal form. 4/8771 useless extension candidates. Maximal degree in co-relation 39523. Up to 7900 conditions per place. [2024-06-27 18:28:45,709 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 148 selfloop transitions, 30 changer transitions 0/188 dead transitions. [2024-06-27 18:28:45,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 188 transitions, 1865 flow [2024-06-27 18:28:45,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:28:45,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:28:45,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 18:28:45,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075 [2024-06-27 18:28:45,710 INFO L175 Difference]: Start difference. First operand has 118 places, 139 transitions, 1233 flow. Second operand 8 states and 203 transitions. [2024-06-27 18:28:45,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 188 transitions, 1865 flow [2024-06-27 18:28:45,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 188 transitions, 1822 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 18:28:45,780 INFO L231 Difference]: Finished difference. Result has 123 places, 145 transitions, 1340 flow [2024-06-27 18:28:45,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1190, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1340, PETRI_PLACES=123, PETRI_TRANSITIONS=145} [2024-06-27 18:28:45,780 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 67 predicate places. [2024-06-27 18:28:45,781 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 145 transitions, 1340 flow [2024-06-27 18:28:45,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:45,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:45,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:45,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 18:28:45,781 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:45,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:45,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1096871603, now seen corresponding path program 3 times [2024-06-27 18:28:45,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:45,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266251510] [2024-06-27 18:28:45,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:45,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:45,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:46,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:46,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:46,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266251510] [2024-06-27 18:28:46,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266251510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:46,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:46,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:28:46,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068463345] [2024-06-27 18:28:46,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:46,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:28:46,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:46,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:28:46,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:28:46,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:28:46,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 145 transitions, 1340 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:46,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:46,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:28:46,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:47,687 INFO L124 PetriNetUnfolderBase]: 5712/8988 cut-off events. [2024-06-27 18:28:47,687 INFO L125 PetriNetUnfolderBase]: For 100940/100940 co-relation queries the response was YES. [2024-06-27 18:28:47,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40570 conditions, 8988 events. 5712/8988 cut-off events. For 100940/100940 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 56668 event pairs, 2044 based on Foata normal form. 4/8855 useless extension candidates. Maximal degree in co-relation 40518. Up to 8060 conditions per place. [2024-06-27 18:28:47,754 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 153 selfloop transitions, 21 changer transitions 0/184 dead transitions. [2024-06-27 18:28:47,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 184 transitions, 1826 flow [2024-06-27 18:28:47,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:28:47,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:28:47,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 18:28:47,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.485 [2024-06-27 18:28:47,755 INFO L175 Difference]: Start difference. First operand has 123 places, 145 transitions, 1340 flow. Second operand 8 states and 194 transitions. [2024-06-27 18:28:47,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 184 transitions, 1826 flow [2024-06-27 18:28:47,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 184 transitions, 1769 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 18:28:47,842 INFO L231 Difference]: Finished difference. Result has 127 places, 148 transitions, 1383 flow [2024-06-27 18:28:47,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1283, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1383, PETRI_PLACES=127, PETRI_TRANSITIONS=148} [2024-06-27 18:28:47,843 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 71 predicate places. [2024-06-27 18:28:47,843 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 148 transitions, 1383 flow [2024-06-27 18:28:47,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:47,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:47,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:47,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 18:28:47,843 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:47,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:47,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1988317592, now seen corresponding path program 3 times [2024-06-27 18:28:47,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:47,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572893448] [2024-06-27 18:28:47,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:47,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:47,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:48,515 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 18:28:48,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:48,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572893448] [2024-06-27 18:28:48,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572893448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:48,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:48,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:28:48,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496146915] [2024-06-27 18:28:48,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:48,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:28:48,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:48,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:28:48,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:28:48,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:28:48,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 148 transitions, 1383 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:48,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:48,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:28:48,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:49,684 INFO L124 PetriNetUnfolderBase]: 5707/8982 cut-off events. [2024-06-27 18:28:49,684 INFO L125 PetriNetUnfolderBase]: For 104209/104215 co-relation queries the response was YES. [2024-06-27 18:28:49,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40478 conditions, 8982 events. 5707/8982 cut-off events. For 104209/104215 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 56608 event pairs, 2046 based on Foata normal form. 6/8850 useless extension candidates. Maximal degree in co-relation 40425. Up to 8066 conditions per place. [2024-06-27 18:28:49,744 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 150 selfloop transitions, 19 changer transitions 0/179 dead transitions. [2024-06-27 18:28:49,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 179 transitions, 1809 flow [2024-06-27 18:28:49,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:28:49,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:28:49,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 18:28:49,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49142857142857144 [2024-06-27 18:28:49,745 INFO L175 Difference]: Start difference. First operand has 127 places, 148 transitions, 1383 flow. Second operand 7 states and 172 transitions. [2024-06-27 18:28:49,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 179 transitions, 1809 flow [2024-06-27 18:28:49,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 179 transitions, 1719 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 18:28:49,823 INFO L231 Difference]: Finished difference. Result has 128 places, 148 transitions, 1339 flow [2024-06-27 18:28:49,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1293, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1339, PETRI_PLACES=128, PETRI_TRANSITIONS=148} [2024-06-27 18:28:49,824 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 72 predicate places. [2024-06-27 18:28:49,824 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 148 transitions, 1339 flow [2024-06-27 18:28:49,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:49,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:49,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:49,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 18:28:49,824 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:49,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:49,824 INFO L85 PathProgramCache]: Analyzing trace with hash 618203133, now seen corresponding path program 4 times [2024-06-27 18:28:49,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:49,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979110161] [2024-06-27 18:28:49,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:49,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:49,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:50,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:50,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:50,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979110161] [2024-06-27 18:28:50,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979110161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:50,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:50,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:28:50,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737479323] [2024-06-27 18:28:50,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:50,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:28:50,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:50,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:28:50,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:28:50,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:28:50,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 148 transitions, 1339 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:50,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:50,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:28:50,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:51,951 INFO L124 PetriNetUnfolderBase]: 5697/8966 cut-off events. [2024-06-27 18:28:51,951 INFO L125 PetriNetUnfolderBase]: For 108828/108828 co-relation queries the response was YES. [2024-06-27 18:28:51,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40383 conditions, 8966 events. 5697/8966 cut-off events. For 108828/108828 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 56495 event pairs, 2037 based on Foata normal form. 4/8833 useless extension candidates. Maximal degree in co-relation 40329. Up to 7990 conditions per place. [2024-06-27 18:28:52,009 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 151 selfloop transitions, 26 changer transitions 0/187 dead transitions. [2024-06-27 18:28:52,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 187 transitions, 1803 flow [2024-06-27 18:28:52,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:28:52,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:28:52,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 18:28:52,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.495 [2024-06-27 18:28:52,010 INFO L175 Difference]: Start difference. First operand has 128 places, 148 transitions, 1339 flow. Second operand 8 states and 198 transitions. [2024-06-27 18:28:52,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 187 transitions, 1803 flow [2024-06-27 18:28:52,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 187 transitions, 1714 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 18:28:52,082 INFO L231 Difference]: Finished difference. Result has 129 places, 148 transitions, 1310 flow [2024-06-27 18:28:52,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1250, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1310, PETRI_PLACES=129, PETRI_TRANSITIONS=148} [2024-06-27 18:28:52,082 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 73 predicate places. [2024-06-27 18:28:52,082 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 148 transitions, 1310 flow [2024-06-27 18:28:52,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:52,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:52,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:52,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 18:28:52,083 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:52,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:52,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1679530898, now seen corresponding path program 1 times [2024-06-27 18:28:52,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:52,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788431763] [2024-06-27 18:28:52,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:52,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:52,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:52,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:52,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:52,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788431763] [2024-06-27 18:28:52,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788431763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:52,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:52,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:28:52,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100987253] [2024-06-27 18:28:52,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:52,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:28:52,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:52,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:28:52,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:28:52,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-06-27 18:28:52,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 148 transitions, 1310 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 18:28:52,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:52,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-06-27 18:28:52,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:54,119 INFO L124 PetriNetUnfolderBase]: 7109/10954 cut-off events. [2024-06-27 18:28:54,119 INFO L125 PetriNetUnfolderBase]: For 147252/147266 co-relation queries the response was YES. [2024-06-27 18:28:54,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49393 conditions, 10954 events. 7109/10954 cut-off events. For 147252/147266 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 68347 event pairs, 2710 based on Foata normal form. 3/10765 useless extension candidates. Maximal degree in co-relation 49338. Up to 10054 conditions per place. [2024-06-27 18:28:54,181 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 140 selfloop transitions, 14 changer transitions 0/171 dead transitions. [2024-06-27 18:28:54,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 171 transitions, 1710 flow [2024-06-27 18:28:54,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:28:54,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:28:54,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-27 18:28:54,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45666666666666667 [2024-06-27 18:28:54,182 INFO L175 Difference]: Start difference. First operand has 129 places, 148 transitions, 1310 flow. Second operand 6 states and 137 transitions. [2024-06-27 18:28:54,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 171 transitions, 1710 flow [2024-06-27 18:28:54,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 171 transitions, 1615 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-27 18:28:54,256 INFO L231 Difference]: Finished difference. Result has 127 places, 151 transitions, 1287 flow [2024-06-27 18:28:54,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1215, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1287, PETRI_PLACES=127, PETRI_TRANSITIONS=151} [2024-06-27 18:28:54,257 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 71 predicate places. [2024-06-27 18:28:54,257 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 151 transitions, 1287 flow [2024-06-27 18:28:54,257 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 18:28:54,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:54,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:54,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 18:28:54,257 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:54,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:54,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1375849660, now seen corresponding path program 1 times [2024-06-27 18:28:54,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:54,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230086109] [2024-06-27 18:28:54,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:54,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:54,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:55,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:55,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:55,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230086109] [2024-06-27 18:28:55,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230086109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:55,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:55,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:28:55,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893299386] [2024-06-27 18:28:55,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:55,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:28:55,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:55,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:28:55,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:28:55,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 18:28:55,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 151 transitions, 1287 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:55,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:55,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 18:28:55,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:56,701 INFO L124 PetriNetUnfolderBase]: 5659/8950 cut-off events. [2024-06-27 18:28:56,702 INFO L125 PetriNetUnfolderBase]: For 140255/140270 co-relation queries the response was YES. [2024-06-27 18:28:56,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42874 conditions, 8950 events. 5659/8950 cut-off events. For 140255/140270 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 57187 event pairs, 1261 based on Foata normal form. 9/8798 useless extension candidates. Maximal degree in co-relation 42819. Up to 7615 conditions per place. [2024-06-27 18:28:56,769 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 165 selfloop transitions, 34 changer transitions 0/219 dead transitions. [2024-06-27 18:28:56,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 219 transitions, 2052 flow [2024-06-27 18:28:56,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:28:56,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:28:56,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-06-27 18:28:56,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-06-27 18:28:56,771 INFO L175 Difference]: Start difference. First operand has 127 places, 151 transitions, 1287 flow. Second operand 8 states and 216 transitions. [2024-06-27 18:28:56,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 219 transitions, 2052 flow [2024-06-27 18:28:56,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 219 transitions, 2004 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 18:28:56,874 INFO L231 Difference]: Finished difference. Result has 133 places, 167 transitions, 1479 flow [2024-06-27 18:28:56,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1239, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1479, PETRI_PLACES=133, PETRI_TRANSITIONS=167} [2024-06-27 18:28:56,874 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 77 predicate places. [2024-06-27 18:28:56,874 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 167 transitions, 1479 flow [2024-06-27 18:28:56,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:56,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:56,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:56,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 18:28:56,875 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:56,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:56,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1218144308, now seen corresponding path program 1 times [2024-06-27 18:28:56,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:56,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291234833] [2024-06-27 18:28:56,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:56,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:56,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:28:57,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:28:57,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:28:57,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291234833] [2024-06-27 18:28:57,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291234833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:28:57,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:28:57,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:28:57,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399619621] [2024-06-27 18:28:57,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:28:57,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:28:57,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:28:57,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:28:57,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:28:57,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:28:57,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 167 transitions, 1479 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:57,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:28:57,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:28:57,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:28:59,083 INFO L124 PetriNetUnfolderBase]: 5951/8980 cut-off events. [2024-06-27 18:28:59,083 INFO L125 PetriNetUnfolderBase]: For 150497/150503 co-relation queries the response was YES. [2024-06-27 18:28:59,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45081 conditions, 8980 events. 5951/8980 cut-off events. For 150497/150503 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 53543 event pairs, 1458 based on Foata normal form. 6/8930 useless extension candidates. Maximal degree in co-relation 45023. Up to 7929 conditions per place. [2024-06-27 18:28:59,158 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 149 selfloop transitions, 67 changer transitions 0/227 dead transitions. [2024-06-27 18:28:59,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 227 transitions, 2271 flow [2024-06-27 18:28:59,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:28:59,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:28:59,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-27 18:28:59,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53 [2024-06-27 18:28:59,160 INFO L175 Difference]: Start difference. First operand has 133 places, 167 transitions, 1479 flow. Second operand 8 states and 212 transitions. [2024-06-27 18:28:59,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 227 transitions, 2271 flow [2024-06-27 18:28:59,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 227 transitions, 2214 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 18:28:59,257 INFO L231 Difference]: Finished difference. Result has 139 places, 176 transitions, 1713 flow [2024-06-27 18:28:59,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1422, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1713, PETRI_PLACES=139, PETRI_TRANSITIONS=176} [2024-06-27 18:28:59,258 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 83 predicate places. [2024-06-27 18:28:59,258 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 176 transitions, 1713 flow [2024-06-27 18:28:59,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:28:59,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:28:59,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:28:59,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 18:28:59,259 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:28:59,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:28:59,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1218144184, now seen corresponding path program 2 times [2024-06-27 18:28:59,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:28:59,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993012475] [2024-06-27 18:28:59,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:28:59,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:28:59,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:29:00,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:29:00,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:29:00,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993012475] [2024-06-27 18:29:00,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993012475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:29:00,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:29:00,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:29:00,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806451839] [2024-06-27 18:29:00,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:29:00,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:29:00,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:29:00,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:29:00,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:29:00,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 18:29:00,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 176 transitions, 1713 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:29:00,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:29:00,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 18:29:00,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:29:01,665 INFO L124 PetriNetUnfolderBase]: 5679/8966 cut-off events. [2024-06-27 18:29:01,665 INFO L125 PetriNetUnfolderBase]: For 162873/162895 co-relation queries the response was YES. [2024-06-27 18:29:01,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45815 conditions, 8966 events. 5679/8966 cut-off events. For 162873/162895 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 57248 event pairs, 1604 based on Foata normal form. 9/8818 useless extension candidates. Maximal degree in co-relation 45754. Up to 7758 conditions per place. [2024-06-27 18:29:01,741 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 177 selfloop transitions, 33 changer transitions 0/233 dead transitions. [2024-06-27 18:29:01,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 233 transitions, 2312 flow [2024-06-27 18:29:01,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:29:01,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:29:01,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 239 transitions. [2024-06-27 18:29:01,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311111111111111 [2024-06-27 18:29:01,743 INFO L175 Difference]: Start difference. First operand has 139 places, 176 transitions, 1713 flow. Second operand 9 states and 239 transitions. [2024-06-27 18:29:01,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 233 transitions, 2312 flow [2024-06-27 18:29:01,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 233 transitions, 2235 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 18:29:01,890 INFO L231 Difference]: Finished difference. Result has 146 places, 177 transitions, 1726 flow [2024-06-27 18:29:01,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1637, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1726, PETRI_PLACES=146, PETRI_TRANSITIONS=177} [2024-06-27 18:29:01,891 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 90 predicate places. [2024-06-27 18:29:01,891 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 177 transitions, 1726 flow [2024-06-27 18:29:01,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:29:01,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:29:01,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:29:01,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 18:29:01,892 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:29:01,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:29:01,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1378711394, now seen corresponding path program 2 times [2024-06-27 18:29:01,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:29:01,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200087246] [2024-06-27 18:29:01,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:29:01,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:29:01,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:29:02,854 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 18:29:02,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:29:02,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200087246] [2024-06-27 18:29:02,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200087246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:29:02,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:29:02,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:29:02,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792093357] [2024-06-27 18:29:02,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:29:02,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:29:02,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:29:02,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:29:02,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:29:02,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:29:02,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 177 transitions, 1726 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:29:02,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:29:02,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:29:02,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:29:04,124 INFO L124 PetriNetUnfolderBase]: 5976/8998 cut-off events. [2024-06-27 18:29:04,125 INFO L125 PetriNetUnfolderBase]: For 171575/171581 co-relation queries the response was YES. [2024-06-27 18:29:04,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47576 conditions, 8998 events. 5976/8998 cut-off events. For 171575/171581 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 53479 event pairs, 1448 based on Foata normal form. 6/8952 useless extension candidates. Maximal degree in co-relation 47512. Up to 8115 conditions per place. [2024-06-27 18:29:04,200 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 157 selfloop transitions, 62 changer transitions 0/230 dead transitions. [2024-06-27 18:29:04,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 230 transitions, 2393 flow [2024-06-27 18:29:04,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:29:04,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:29:04,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-27 18:29:04,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175 [2024-06-27 18:29:04,201 INFO L175 Difference]: Start difference. First operand has 146 places, 177 transitions, 1726 flow. Second operand 8 states and 207 transitions. [2024-06-27 18:29:04,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 230 transitions, 2393 flow [2024-06-27 18:29:04,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 230 transitions, 2329 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 18:29:04,341 INFO L231 Difference]: Finished difference. Result has 149 places, 184 transitions, 1894 flow [2024-06-27 18:29:04,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1662, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1894, PETRI_PLACES=149, PETRI_TRANSITIONS=184} [2024-06-27 18:29:04,342 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 93 predicate places. [2024-06-27 18:29:04,342 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 184 transitions, 1894 flow [2024-06-27 18:29:04,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:29:04,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:29:04,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:29:04,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 18:29:04,343 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:29:04,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:29:04,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1220940818, now seen corresponding path program 3 times [2024-06-27 18:29:04,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:29:04,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388294401] [2024-06-27 18:29:04,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:29:04,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:29:04,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:29:05,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:29:05,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:29:05,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388294401] [2024-06-27 18:29:05,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388294401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:29:05,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:29:05,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:29:05,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884512039] [2024-06-27 18:29:05,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:29:05,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:29:05,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:29:05,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:29:05,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:29:05,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:29:05,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 184 transitions, 1894 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:29:05,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:29:05,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:29:05,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:29:06,722 INFO L124 PetriNetUnfolderBase]: 6031/9339 cut-off events. [2024-06-27 18:29:06,722 INFO L125 PetriNetUnfolderBase]: For 184222/184228 co-relation queries the response was YES. [2024-06-27 18:29:06,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49157 conditions, 9339 events. 6031/9339 cut-off events. For 184222/184228 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 58102 event pairs, 1717 based on Foata normal form. 6/9191 useless extension candidates. Maximal degree in co-relation 49091. Up to 8211 conditions per place. [2024-06-27 18:29:06,804 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 183 selfloop transitions, 48 changer transitions 0/242 dead transitions. [2024-06-27 18:29:06,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 242 transitions, 2599 flow [2024-06-27 18:29:06,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:29:06,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:29:06,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-27 18:29:06,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2024-06-27 18:29:06,805 INFO L175 Difference]: Start difference. First operand has 149 places, 184 transitions, 1894 flow. Second operand 9 states and 230 transitions. [2024-06-27 18:29:06,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 242 transitions, 2599 flow [2024-06-27 18:29:06,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 242 transitions, 2423 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-27 18:29:06,946 INFO L231 Difference]: Finished difference. Result has 153 places, 190 transitions, 1921 flow [2024-06-27 18:29:06,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1743, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1921, PETRI_PLACES=153, PETRI_TRANSITIONS=190} [2024-06-27 18:29:06,947 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 97 predicate places. [2024-06-27 18:29:06,947 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 190 transitions, 1921 flow [2024-06-27 18:29:06,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:29:06,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:29:06,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:29:06,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 18:29:06,947 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:29:06,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:29:06,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1336231988, now seen corresponding path program 4 times [2024-06-27 18:29:06,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:29:06,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865648996] [2024-06-27 18:29:06,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:29:06,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:29:06,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:29:07,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:29:07,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:29:07,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865648996] [2024-06-27 18:29:07,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865648996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:29:07,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:29:07,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:29:07,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430645226] [2024-06-27 18:29:07,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:29:07,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:29:07,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:29:07,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:29:07,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:29:07,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:29:07,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 190 transitions, 1921 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:29:07,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:29:07,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:29:07,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:29:09,229 INFO L124 PetriNetUnfolderBase]: 6032/9070 cut-off events. [2024-06-27 18:29:09,230 INFO L125 PetriNetUnfolderBase]: For 193283/193289 co-relation queries the response was YES. [2024-06-27 18:29:09,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49312 conditions, 9070 events. 6032/9070 cut-off events. For 193283/193289 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 53806 event pairs, 1446 based on Foata normal form. 6/9024 useless extension candidates. Maximal degree in co-relation 49245. Up to 8108 conditions per place. [2024-06-27 18:29:09,298 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 164 selfloop transitions, 77 changer transitions 0/252 dead transitions. [2024-06-27 18:29:09,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 252 transitions, 2801 flow [2024-06-27 18:29:09,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:29:09,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:29:09,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-27 18:29:09,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425 [2024-06-27 18:29:09,299 INFO L175 Difference]: Start difference. First operand has 153 places, 190 transitions, 1921 flow. Second operand 8 states and 217 transitions. [2024-06-27 18:29:09,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 252 transitions, 2801 flow [2024-06-27 18:29:09,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 252 transitions, 2695 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 18:29:09,449 INFO L231 Difference]: Finished difference. Result has 156 places, 199 transitions, 2153 flow [2024-06-27 18:29:09,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1815, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2153, PETRI_PLACES=156, PETRI_TRANSITIONS=199} [2024-06-27 18:29:09,450 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 100 predicate places. [2024-06-27 18:29:09,450 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 199 transitions, 2153 flow [2024-06-27 18:29:09,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:29:09,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:29:09,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:29:09,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 18:29:09,450 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:29:09,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:29:09,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1336409618, now seen corresponding path program 5 times [2024-06-27 18:29:09,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:29:09,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506657709] [2024-06-27 18:29:09,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:29:09,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:29:09,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:29:10,367 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 18:29:10,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:29:10,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506657709] [2024-06-27 18:29:10,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506657709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:29:10,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:29:10,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:29:10,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137006767] [2024-06-27 18:29:10,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:29:10,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:29:10,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:29:10,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:29:10,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:29:10,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:29:10,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 199 transitions, 2153 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:29:10,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:29:10,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:29:10,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:29:11,797 INFO L124 PetriNetUnfolderBase]: 6070/9123 cut-off events. [2024-06-27 18:29:11,798 INFO L125 PetriNetUnfolderBase]: For 206404/206410 co-relation queries the response was YES. [2024-06-27 18:29:11,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50682 conditions, 9123 events. 6070/9123 cut-off events. For 206404/206410 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 54078 event pairs, 1446 based on Foata normal form. 6/9078 useless extension candidates. Maximal degree in co-relation 50613. Up to 8241 conditions per place. [2024-06-27 18:29:11,862 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 173 selfloop transitions, 72 changer transitions 0/256 dead transitions. [2024-06-27 18:29:11,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 256 transitions, 2960 flow [2024-06-27 18:29:11,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:29:11,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:29:11,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-27 18:29:11,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515 [2024-06-27 18:29:11,863 INFO L175 Difference]: Start difference. First operand has 156 places, 199 transitions, 2153 flow. Second operand 8 states and 206 transitions. [2024-06-27 18:29:11,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 256 transitions, 2960 flow [2024-06-27 18:29:12,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 256 transitions, 2895 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-27 18:29:12,036 INFO L231 Difference]: Finished difference. Result has 163 places, 211 transitions, 2456 flow [2024-06-27 18:29:12,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2094, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2456, PETRI_PLACES=163, PETRI_TRANSITIONS=211} [2024-06-27 18:29:12,037 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 107 predicate places. [2024-06-27 18:29:12,037 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 211 transitions, 2456 flow [2024-06-27 18:29:12,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:29:12,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:29:12,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:29:12,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 18:29:12,037 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:29:12,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:29:12,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1644470474, now seen corresponding path program 6 times [2024-06-27 18:29:12,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:29:12,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133517586] [2024-06-27 18:29:12,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:29:12,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:29:12,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:29:12,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:29:12,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:29:12,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133517586] [2024-06-27 18:29:12,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133517586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:29:12,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:29:12,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:29:12,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018127997] [2024-06-27 18:29:12,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:29:12,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:29:12,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:29:12,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:29:12,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:29:13,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:29:13,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 211 transitions, 2456 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:29:13,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:29:13,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:29:13,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:29:14,334 INFO L124 PetriNetUnfolderBase]: 6093/9155 cut-off events. [2024-06-27 18:29:14,334 INFO L125 PetriNetUnfolderBase]: For 213743/213749 co-relation queries the response was YES. [2024-06-27 18:29:14,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51084 conditions, 9155 events. 6093/9155 cut-off events. For 213743/213749 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 54364 event pairs, 1446 based on Foata normal form. 6/9109 useless extension candidates. Maximal degree in co-relation 51012. Up to 8273 conditions per place. [2024-06-27 18:29:14,414 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 174 selfloop transitions, 77 changer transitions 0/262 dead transitions. [2024-06-27 18:29:14,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 262 transitions, 3160 flow [2024-06-27 18:29:14,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:29:14,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:29:14,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-27 18:29:14,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-27 18:29:14,416 INFO L175 Difference]: Start difference. First operand has 163 places, 211 transitions, 2456 flow. Second operand 8 states and 210 transitions. [2024-06-27 18:29:14,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 262 transitions, 3160 flow [2024-06-27 18:29:14,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 262 transitions, 3026 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-27 18:29:14,661 INFO L231 Difference]: Finished difference. Result has 168 places, 214 transitions, 2549 flow [2024-06-27 18:29:14,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2322, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2549, PETRI_PLACES=168, PETRI_TRANSITIONS=214} [2024-06-27 18:29:14,661 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 112 predicate places. [2024-06-27 18:29:14,661 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 214 transitions, 2549 flow [2024-06-27 18:29:14,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:29:14,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:29:14,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:29:14,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 18:29:14,662 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:29:14,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:29:14,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1494002750, now seen corresponding path program 1 times [2024-06-27 18:29:14,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:29:14,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156010389] [2024-06-27 18:29:14,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:29:14,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:29:14,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:29:15,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:29:15,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:29:15,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156010389] [2024-06-27 18:29:15,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156010389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:29:15,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:29:15,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:29:15,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170714201] [2024-06-27 18:29:15,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:29:15,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:29:15,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:29:15,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:29:15,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:29:15,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:29:15,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 214 transitions, 2549 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:29:15,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:29:15,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:29:15,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:29:16,830 INFO L124 PetriNetUnfolderBase]: 6166/9561 cut-off events. [2024-06-27 18:29:16,830 INFO L125 PetriNetUnfolderBase]: For 227806/227812 co-relation queries the response was YES. [2024-06-27 18:29:16,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52293 conditions, 9561 events. 6166/9561 cut-off events. For 227806/227812 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 59752 event pairs, 1635 based on Foata normal form. 5/9406 useless extension candidates. Maximal degree in co-relation 52220. Up to 8114 conditions per place. [2024-06-27 18:29:16,915 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 199 selfloop transitions, 59 changer transitions 0/269 dead transitions. [2024-06-27 18:29:16,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 269 transitions, 3385 flow [2024-06-27 18:29:16,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:29:16,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:29:16,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-27 18:29:16,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425 [2024-06-27 18:29:16,916 INFO L175 Difference]: Start difference. First operand has 168 places, 214 transitions, 2549 flow. Second operand 8 states and 217 transitions. [2024-06-27 18:29:16,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 269 transitions, 3385 flow [2024-06-27 18:29:17,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 269 transitions, 3200 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 18:29:17,168 INFO L231 Difference]: Finished difference. Result has 171 places, 217 transitions, 2528 flow [2024-06-27 18:29:17,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2364, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2528, PETRI_PLACES=171, PETRI_TRANSITIONS=217} [2024-06-27 18:29:17,168 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 115 predicate places. [2024-06-27 18:29:17,168 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 217 transitions, 2528 flow [2024-06-27 18:29:17,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:29:17,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:29:17,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:29:17,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 18:29:17,169 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:29:17,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:29:17,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1494175730, now seen corresponding path program 2 times [2024-06-27 18:29:17,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:29:17,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470951076] [2024-06-27 18:29:17,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:29:17,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:29:17,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:29:17,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:29:17,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:29:17,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470951076] [2024-06-27 18:29:17,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470951076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:29:17,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:29:17,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:29:17,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890189322] [2024-06-27 18:29:17,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:29:17,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:29:17,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:29:17,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:29:17,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:29:18,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:29:18,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 217 transitions, 2528 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:29:18,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:29:18,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:29:18,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:29:19,308 INFO L124 PetriNetUnfolderBase]: 6268/9694 cut-off events. [2024-06-27 18:29:19,308 INFO L125 PetriNetUnfolderBase]: For 242529/242535 co-relation queries the response was YES. [2024-06-27 18:29:19,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53657 conditions, 9694 events. 6268/9694 cut-off events. For 242529/242535 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 60443 event pairs, 1629 based on Foata normal form. 5/9545 useless extension candidates. Maximal degree in co-relation 53583. Up to 8200 conditions per place. [2024-06-27 18:29:19,395 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 204 selfloop transitions, 60 changer transitions 0/275 dead transitions. [2024-06-27 18:29:19,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 275 transitions, 3558 flow [2024-06-27 18:29:19,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:29:19,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:29:19,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-27 18:29:19,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425 [2024-06-27 18:29:19,397 INFO L175 Difference]: Start difference. First operand has 171 places, 217 transitions, 2528 flow. Second operand 8 states and 217 transitions. [2024-06-27 18:29:19,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 275 transitions, 3558 flow [2024-06-27 18:29:19,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 275 transitions, 3382 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 18:29:19,639 INFO L231 Difference]: Finished difference. Result has 173 places, 223 transitions, 2568 flow [2024-06-27 18:29:19,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2372, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2568, PETRI_PLACES=173, PETRI_TRANSITIONS=223} [2024-06-27 18:29:19,640 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 117 predicate places. [2024-06-27 18:29:19,640 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 223 transitions, 2568 flow [2024-06-27 18:29:19,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:29:19,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:29:19,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:29:19,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 18:29:19,640 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:29:19,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:29:19,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1494182240, now seen corresponding path program 3 times [2024-06-27 18:29:19,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:29:19,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851480640] [2024-06-27 18:29:19,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:29:19,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:29:19,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:29:20,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:29:20,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:29:20,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851480640] [2024-06-27 18:29:20,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851480640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:29:20,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:29:20,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:29:20,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184662928] [2024-06-27 18:29:20,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:29:20,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:29:20,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:29:20,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:29:20,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:29:20,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:29:20,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 223 transitions, 2568 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:29:20,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:29:20,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:29:20,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:29:21,823 INFO L124 PetriNetUnfolderBase]: 6258/9680 cut-off events. [2024-06-27 18:29:21,824 INFO L125 PetriNetUnfolderBase]: For 250238/250244 co-relation queries the response was YES. [2024-06-27 18:29:21,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53620 conditions, 9680 events. 6258/9680 cut-off events. For 250238/250244 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 60401 event pairs, 1629 based on Foata normal form. 5/9531 useless extension candidates. Maximal degree in co-relation 53545. Up to 8192 conditions per place. [2024-06-27 18:29:21,921 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 200 selfloop transitions, 61 changer transitions 0/272 dead transitions. [2024-06-27 18:29:21,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 272 transitions, 3372 flow [2024-06-27 18:29:21,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:29:21,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:29:21,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-27 18:29:21,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5325 [2024-06-27 18:29:21,922 INFO L175 Difference]: Start difference. First operand has 173 places, 223 transitions, 2568 flow. Second operand 8 states and 213 transitions. [2024-06-27 18:29:21,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 272 transitions, 3372 flow [2024-06-27 18:29:22,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 272 transitions, 3249 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-27 18:29:22,177 INFO L231 Difference]: Finished difference. Result has 177 places, 223 transitions, 2576 flow [2024-06-27 18:29:22,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2445, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2576, PETRI_PLACES=177, PETRI_TRANSITIONS=223} [2024-06-27 18:29:22,179 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 121 predicate places. [2024-06-27 18:29:22,179 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 223 transitions, 2576 flow [2024-06-27 18:29:22,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:29:22,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:29:22,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:29:22,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 18:29:22,179 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:29:22,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:29:22,180 INFO L85 PathProgramCache]: Analyzing trace with hash 511579631, now seen corresponding path program 1 times [2024-06-27 18:29:22,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:29:22,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314660200] [2024-06-27 18:29:22,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:29:22,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:29:22,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:29:22,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:29:22,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:29:22,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314660200] [2024-06-27 18:29:22,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314660200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:29:22,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:29:22,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:29:22,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804862659] [2024-06-27 18:29:22,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:29:22,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:29:22,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:29:22,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:29:22,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:29:22,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:29:22,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 223 transitions, 2576 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 18:29:22,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:29:22,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:29:22,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:29:24,264 INFO L124 PetriNetUnfolderBase]: 6992/10905 cut-off events. [2024-06-27 18:29:24,264 INFO L125 PetriNetUnfolderBase]: For 295247/295259 co-relation queries the response was YES. [2024-06-27 18:29:24,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59322 conditions, 10905 events. 6992/10905 cut-off events. For 295247/295259 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 69427 event pairs, 2085 based on Foata normal form. 5/10705 useless extension candidates. Maximal degree in co-relation 59246. Up to 9712 conditions per place. [2024-06-27 18:29:24,356 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 207 selfloop transitions, 18 changer transitions 0/259 dead transitions. [2024-06-27 18:29:24,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 259 transitions, 3266 flow [2024-06-27 18:29:24,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:29:24,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:29:24,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-27 18:29:24,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 18:29:24,357 INFO L175 Difference]: Start difference. First operand has 177 places, 223 transitions, 2576 flow. Second operand 6 states and 150 transitions. [2024-06-27 18:29:24,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 259 transitions, 3266 flow [2024-06-27 18:29:24,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 259 transitions, 3135 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 18:29:24,598 INFO L231 Difference]: Finished difference. Result has 177 places, 233 transitions, 2603 flow [2024-06-27 18:29:24,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2445, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2603, PETRI_PLACES=177, PETRI_TRANSITIONS=233} [2024-06-27 18:29:24,598 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 121 predicate places. [2024-06-27 18:29:24,598 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 233 transitions, 2603 flow [2024-06-27 18:29:24,599 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 18:29:24,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:29:24,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:29:24,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 18:29:24,599 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:29:24,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:29:24,600 INFO L85 PathProgramCache]: Analyzing trace with hash 347545662, now seen corresponding path program 7 times [2024-06-27 18:29:24,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:29:24,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79705250] [2024-06-27 18:29:24,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:29:24,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:29:24,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:29:25,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:29:25,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:29:25,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79705250] [2024-06-27 18:29:25,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79705250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:29:25,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:29:25,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:29:25,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630021142] [2024-06-27 18:29:25,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:29:25,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:29:25,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:29:25,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:29:25,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:29:25,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:29:25,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 233 transitions, 2603 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:29:25,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:29:25,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:29:25,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:29:27,068 INFO L124 PetriNetUnfolderBase]: 6342/9893 cut-off events. [2024-06-27 18:29:27,068 INFO L125 PetriNetUnfolderBase]: For 276031/276037 co-relation queries the response was YES. [2024-06-27 18:29:27,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55412 conditions, 9893 events. 6342/9893 cut-off events. For 276031/276037 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 62715 event pairs, 2003 based on Foata normal form. 6/9732 useless extension candidates. Maximal degree in co-relation 55334. Up to 8858 conditions per place. [2024-06-27 18:29:27,152 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 230 selfloop transitions, 33 changer transitions 0/274 dead transitions. [2024-06-27 18:29:27,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 274 transitions, 3253 flow [2024-06-27 18:29:27,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:29:27,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:29:27,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 18:29:27,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.495 [2024-06-27 18:29:27,153 INFO L175 Difference]: Start difference. First operand has 177 places, 233 transitions, 2603 flow. Second operand 8 states and 198 transitions. [2024-06-27 18:29:27,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 274 transitions, 3253 flow [2024-06-27 18:29:27,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 274 transitions, 3185 flow, removed 33 selfloop flow, removed 1 redundant places. [2024-06-27 18:29:27,443 INFO L231 Difference]: Finished difference. Result has 184 places, 233 transitions, 2610 flow [2024-06-27 18:29:27,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2535, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2610, PETRI_PLACES=184, PETRI_TRANSITIONS=233} [2024-06-27 18:29:27,443 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 128 predicate places. [2024-06-27 18:29:27,443 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 233 transitions, 2610 flow [2024-06-27 18:29:27,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:29:27,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:29:27,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:29:27,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 18:29:27,444 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:29:27,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:29:27,444 INFO L85 PathProgramCache]: Analyzing trace with hash -289484072, now seen corresponding path program 4 times [2024-06-27 18:29:27,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:29:27,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108959388] [2024-06-27 18:29:27,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:29:27,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:29:27,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:29:28,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:29:28,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:29:28,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108959388] [2024-06-27 18:29:28,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108959388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:29:28,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:29:28,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:29:28,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243602871] [2024-06-27 18:29:28,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:29:28,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:29:28,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:29:28,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:29:28,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:29:28,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:29:28,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 233 transitions, 2610 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:29:28,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:29:28,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:29:28,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:29:29,869 INFO L124 PetriNetUnfolderBase]: 6388/9978 cut-off events. [2024-06-27 18:29:29,869 INFO L125 PetriNetUnfolderBase]: For 290237/290243 co-relation queries the response was YES. [2024-06-27 18:29:29,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56091 conditions, 9978 events. 6388/9978 cut-off events. For 290237/290243 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 63486 event pairs, 2025 based on Foata normal form. 8/9815 useless extension candidates. Maximal degree in co-relation 56010. Up to 8901 conditions per place. [2024-06-27 18:29:29,962 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 241 selfloop transitions, 23 changer transitions 0/275 dead transitions. [2024-06-27 18:29:29,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 275 transitions, 3289 flow [2024-06-27 18:29:29,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:29:29,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:29:29,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-27 18:29:29,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4925 [2024-06-27 18:29:29,963 INFO L175 Difference]: Start difference. First operand has 184 places, 233 transitions, 2610 flow. Second operand 8 states and 197 transitions. [2024-06-27 18:29:29,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 275 transitions, 3289 flow [2024-06-27 18:29:30,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 275 transitions, 3061 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-27 18:29:30,225 INFO L231 Difference]: Finished difference. Result has 183 places, 236 transitions, 2479 flow [2024-06-27 18:29:30,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2382, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2479, PETRI_PLACES=183, PETRI_TRANSITIONS=236} [2024-06-27 18:29:30,226 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 127 predicate places. [2024-06-27 18:29:30,226 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 236 transitions, 2479 flow [2024-06-27 18:29:30,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:29:30,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:29:30,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:29:30,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 18:29:30,227 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:29:30,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:29:30,227 INFO L85 PathProgramCache]: Analyzing trace with hash -289721222, now seen corresponding path program 5 times [2024-06-27 18:29:30,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:29:30,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917454984] [2024-06-27 18:29:30,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:29:30,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:29:30,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:29:31,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:29:31,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:29:31,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917454984] [2024-06-27 18:29:31,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917454984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:29:31,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:29:31,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:29:31,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756069727] [2024-06-27 18:29:31,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:29:31,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:29:31,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:29:31,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:29:31,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:29:31,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:29:31,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 236 transitions, 2479 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:29:31,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:29:31,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:29:31,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:29:32,546 INFO L124 PetriNetUnfolderBase]: 6434/10026 cut-off events. [2024-06-27 18:29:32,546 INFO L125 PetriNetUnfolderBase]: For 302364/302370 co-relation queries the response was YES. [2024-06-27 18:29:32,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56404 conditions, 10026 events. 6434/10026 cut-off events. For 302364/302370 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 63589 event pairs, 2015 based on Foata normal form. 8/9868 useless extension candidates. Maximal degree in co-relation 56324. Up to 8816 conditions per place. [2024-06-27 18:29:32,648 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 236 selfloop transitions, 36 changer transitions 0/283 dead transitions. [2024-06-27 18:29:32,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 283 transitions, 3348 flow [2024-06-27 18:29:32,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:29:32,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:29:32,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-27 18:29:32,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51 [2024-06-27 18:29:32,650 INFO L175 Difference]: Start difference. First operand has 183 places, 236 transitions, 2479 flow. Second operand 8 states and 204 transitions. [2024-06-27 18:29:32,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 283 transitions, 3348 flow [2024-06-27 18:29:32,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 283 transitions, 3284 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 18:29:32,957 INFO L231 Difference]: Finished difference. Result has 185 places, 239 transitions, 2538 flow [2024-06-27 18:29:32,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2415, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2538, PETRI_PLACES=185, PETRI_TRANSITIONS=239} [2024-06-27 18:29:32,958 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 129 predicate places. [2024-06-27 18:29:32,958 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 239 transitions, 2538 flow [2024-06-27 18:29:32,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:29:32,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:29:32,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:29:32,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 18:29:32,959 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:29:32,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:29:32,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1984429562, now seen corresponding path program 6 times [2024-06-27 18:29:32,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:29:32,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896213825] [2024-06-27 18:29:32,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:29:32,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:29:32,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:29:33,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:29:33,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:29:33,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896213825] [2024-06-27 18:29:33,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896213825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:29:33,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:29:33,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:29:33,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369995192] [2024-06-27 18:29:33,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:29:33,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:29:33,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:29:33,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:29:33,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:29:33,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:29:33,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 239 transitions, 2538 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:29:33,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:29:33,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:29:33,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:29:35,279 INFO L124 PetriNetUnfolderBase]: 6424/10028 cut-off events. [2024-06-27 18:29:35,280 INFO L125 PetriNetUnfolderBase]: For 312546/312552 co-relation queries the response was YES. [2024-06-27 18:29:35,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56604 conditions, 10028 events. 6424/10028 cut-off events. For 312546/312552 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 63816 event pairs, 2028 based on Foata normal form. 8/9865 useless extension candidates. Maximal degree in co-relation 56523. Up to 8808 conditions per place. [2024-06-27 18:29:35,374 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 235 selfloop transitions, 35 changer transitions 0/281 dead transitions. [2024-06-27 18:29:35,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 281 transitions, 3210 flow [2024-06-27 18:29:35,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:29:35,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:29:35,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 18:29:35,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075 [2024-06-27 18:29:35,375 INFO L175 Difference]: Start difference. First operand has 185 places, 239 transitions, 2538 flow. Second operand 8 states and 203 transitions. [2024-06-27 18:29:35,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 281 transitions, 3210 flow [2024-06-27 18:29:35,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 281 transitions, 3046 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-27 18:29:35,667 INFO L231 Difference]: Finished difference. Result has 186 places, 239 transitions, 2452 flow [2024-06-27 18:29:35,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2374, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2452, PETRI_PLACES=186, PETRI_TRANSITIONS=239} [2024-06-27 18:29:35,668 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 130 predicate places. [2024-06-27 18:29:35,668 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 239 transitions, 2452 flow [2024-06-27 18:29:35,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:29:35,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:29:35,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:29:35,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 18:29:35,668 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:29:35,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:29:35,669 INFO L85 PathProgramCache]: Analyzing trace with hash 525834671, now seen corresponding path program 2 times [2024-06-27 18:29:35,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:29:35,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296899577] [2024-06-27 18:29:35,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:29:35,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:29:35,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:29:36,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:29:36,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:29:36,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296899577] [2024-06-27 18:29:36,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296899577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:29:36,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:29:36,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:29:36,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513564778] [2024-06-27 18:29:36,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:29:36,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:29:36,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:29:36,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:29:36,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:29:36,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:29:36,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 239 transitions, 2452 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 18:29:36,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:29:36,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:29:36,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:29:37,841 INFO L124 PetriNetUnfolderBase]: 7148/11217 cut-off events. [2024-06-27 18:29:37,841 INFO L125 PetriNetUnfolderBase]: For 363197/363219 co-relation queries the response was YES. [2024-06-27 18:29:37,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61941 conditions, 11217 events. 7148/11217 cut-off events. For 363197/363219 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 72238 event pairs, 2443 based on Foata normal form. 7/11017 useless extension candidates. Maximal degree in co-relation 61859. Up to 9971 conditions per place. [2024-06-27 18:29:37,949 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 209 selfloop transitions, 13 changer transitions 0/256 dead transitions. [2024-06-27 18:29:37,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 256 transitions, 2944 flow [2024-06-27 18:29:37,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:29:37,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:29:37,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-27 18:29:37,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-27 18:29:37,950 INFO L175 Difference]: Start difference. First operand has 186 places, 239 transitions, 2452 flow. Second operand 6 states and 140 transitions. [2024-06-27 18:29:37,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 256 transitions, 2944 flow [2024-06-27 18:29:38,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 256 transitions, 2838 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 18:29:38,274 INFO L231 Difference]: Finished difference. Result has 185 places, 239 transitions, 2378 flow [2024-06-27 18:29:38,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2346, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2378, PETRI_PLACES=185, PETRI_TRANSITIONS=239} [2024-06-27 18:29:38,274 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 129 predicate places. [2024-06-27 18:29:38,275 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 239 transitions, 2378 flow [2024-06-27 18:29:38,275 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 18:29:38,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:29:38,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:29:38,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 18:29:38,275 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:29:38,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:29:38,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1297243872, now seen corresponding path program 1 times [2024-06-27 18:29:38,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:29:38,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882105840] [2024-06-27 18:29:38,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:29:38,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:29:38,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:29:38,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:29:38,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:29:38,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882105840] [2024-06-27 18:29:38,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882105840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:29:38,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:29:38,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:29:38,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786524020] [2024-06-27 18:29:38,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:29:38,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:29:38,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:29:38,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:29:38,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:29:38,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:29:38,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 239 transitions, 2378 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 18:29:38,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:29:38,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:29:38,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:29:40,593 INFO L124 PetriNetUnfolderBase]: 7165/11251 cut-off events. [2024-06-27 18:29:40,594 INFO L125 PetriNetUnfolderBase]: For 377034/377056 co-relation queries the response was YES. [2024-06-27 18:29:40,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61967 conditions, 11251 events. 7165/11251 cut-off events. For 377034/377056 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 72486 event pairs, 2426 based on Foata normal form. 7/11048 useless extension candidates. Maximal degree in co-relation 61884. Up to 9957 conditions per place. [2024-06-27 18:29:40,683 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 211 selfloop transitions, 24 changer transitions 0/269 dead transitions. [2024-06-27 18:29:40,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 269 transitions, 3068 flow [2024-06-27 18:29:40,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:29:40,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:29:40,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-27 18:29:40,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49333333333333335 [2024-06-27 18:29:40,684 INFO L175 Difference]: Start difference. First operand has 185 places, 239 transitions, 2378 flow. Second operand 6 states and 148 transitions. [2024-06-27 18:29:40,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 269 transitions, 3068 flow [2024-06-27 18:29:41,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 269 transitions, 3017 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 18:29:41,031 INFO L231 Difference]: Finished difference. Result has 186 places, 245 transitions, 2452 flow [2024-06-27 18:29:41,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2327, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2452, PETRI_PLACES=186, PETRI_TRANSITIONS=245} [2024-06-27 18:29:41,032 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 130 predicate places. [2024-06-27 18:29:41,032 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 245 transitions, 2452 flow [2024-06-27 18:29:41,032 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 18:29:41,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:29:41,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:29:41,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 18:29:41,032 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:29:41,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:29:41,033 INFO L85 PathProgramCache]: Analyzing trace with hash 357057919, now seen corresponding path program 1 times [2024-06-27 18:29:41,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:29:41,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243599917] [2024-06-27 18:29:41,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:29:41,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:29:41,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:29:42,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:29:42,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:29:42,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243599917] [2024-06-27 18:29:42,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243599917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:29:42,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:29:42,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:29:42,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835213178] [2024-06-27 18:29:42,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:29:42,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:29:42,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:29:42,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:29:42,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:29:42,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-06-27 18:29:42,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 245 transitions, 2452 flow. Second operand has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:29:42,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:29:42,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-06-27 18:29:42,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:29:44,332 INFO L124 PetriNetUnfolderBase]: 7472/11613 cut-off events. [2024-06-27 18:29:44,332 INFO L125 PetriNetUnfolderBase]: For 396450/396450 co-relation queries the response was YES. [2024-06-27 18:29:44,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64833 conditions, 11613 events. 7472/11613 cut-off events. For 396450/396450 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 73881 event pairs, 2397 based on Foata normal form. 4/11392 useless extension candidates. Maximal degree in co-relation 64750. Up to 10402 conditions per place. [2024-06-27 18:29:44,421 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 260 selfloop transitions, 32 changer transitions 0/302 dead transitions. [2024-06-27 18:29:44,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 302 transitions, 3250 flow [2024-06-27 18:29:44,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:29:44,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:29:44,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-27 18:29:44,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47555555555555556 [2024-06-27 18:29:44,423 INFO L175 Difference]: Start difference. First operand has 186 places, 245 transitions, 2452 flow. Second operand 9 states and 214 transitions. [2024-06-27 18:29:44,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 302 transitions, 3250 flow [2024-06-27 18:29:44,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 302 transitions, 3205 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-27 18:29:44,753 INFO L231 Difference]: Finished difference. Result has 194 places, 252 transitions, 2565 flow [2024-06-27 18:29:44,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2409, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2565, PETRI_PLACES=194, PETRI_TRANSITIONS=252} [2024-06-27 18:29:44,753 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 138 predicate places. [2024-06-27 18:29:44,753 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 252 transitions, 2565 flow [2024-06-27 18:29:44,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:29:44,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:29:44,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:29:44,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 18:29:44,754 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:29:44,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:29:44,754 INFO L85 PathProgramCache]: Analyzing trace with hash 525841584, now seen corresponding path program 2 times [2024-06-27 18:29:44,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:29:44,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838980777] [2024-06-27 18:29:44,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:29:44,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:29:44,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:29:45,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:29:45,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:29:45,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838980777] [2024-06-27 18:29:45,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838980777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:29:45,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:29:45,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:29:45,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615492733] [2024-06-27 18:29:45,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:29:45,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:29:45,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:29:45,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:29:45,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:29:45,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:29:45,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 252 transitions, 2565 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 18:29:45,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:29:45,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:29:45,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:29:46,960 INFO L124 PetriNetUnfolderBase]: 7155/11234 cut-off events. [2024-06-27 18:29:46,960 INFO L125 PetriNetUnfolderBase]: For 409414/409442 co-relation queries the response was YES. [2024-06-27 18:29:47,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64125 conditions, 11234 events. 7155/11234 cut-off events. For 409414/409442 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 72276 event pairs, 2354 based on Foata normal form. 11/11035 useless extension candidates. Maximal degree in co-relation 64039. Up to 9943 conditions per place. [2024-06-27 18:29:47,083 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 214 selfloop transitions, 24 changer transitions 0/272 dead transitions. [2024-06-27 18:29:47,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 272 transitions, 3105 flow [2024-06-27 18:29:47,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:29:47,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:29:47,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-27 18:29:47,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-06-27 18:29:47,085 INFO L175 Difference]: Start difference. First operand has 194 places, 252 transitions, 2565 flow. Second operand 6 states and 144 transitions. [2024-06-27 18:29:47,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 272 transitions, 3105 flow [2024-06-27 18:29:47,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 272 transitions, 2996 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 18:29:47,514 INFO L231 Difference]: Finished difference. Result has 194 places, 252 transitions, 2511 flow [2024-06-27 18:29:47,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2456, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2511, PETRI_PLACES=194, PETRI_TRANSITIONS=252} [2024-06-27 18:29:47,515 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 138 predicate places. [2024-06-27 18:29:47,515 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 252 transitions, 2511 flow [2024-06-27 18:29:47,515 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 18:29:47,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:29:47,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:29:47,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 18:29:47,516 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:29:47,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:29:47,516 INFO L85 PathProgramCache]: Analyzing trace with hash 525851504, now seen corresponding path program 1 times [2024-06-27 18:29:47,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:29:47,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690405294] [2024-06-27 18:29:47,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:29:47,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:29:47,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:29:48,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:29:48,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:29:48,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690405294] [2024-06-27 18:29:48,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690405294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:29:48,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:29:48,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:29:48,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612015526] [2024-06-27 18:29:48,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:29:48,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:29:48,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:29:48,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:29:48,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:29:48,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-06-27 18:29:48,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 252 transitions, 2511 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 18:29:48,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:29:48,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-06-27 18:29:48,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:29:49,961 INFO L124 PetriNetUnfolderBase]: 7683/11663 cut-off events. [2024-06-27 18:29:49,961 INFO L125 PetriNetUnfolderBase]: For 422879/422901 co-relation queries the response was YES. [2024-06-27 18:29:50,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66139 conditions, 11663 events. 7683/11663 cut-off events. For 422879/422901 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 71313 event pairs, 2605 based on Foata normal form. 9/11505 useless extension candidates. Maximal degree in co-relation 66052. Up to 10762 conditions per place. [2024-06-27 18:29:50,090 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 229 selfloop transitions, 20 changer transitions 0/281 dead transitions. [2024-06-27 18:29:50,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 281 transitions, 3125 flow [2024-06-27 18:29:50,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:29:50,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:29:50,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-27 18:29:50,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4542857142857143 [2024-06-27 18:29:50,092 INFO L175 Difference]: Start difference. First operand has 194 places, 252 transitions, 2511 flow. Second operand 7 states and 159 transitions. [2024-06-27 18:29:50,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 281 transitions, 3125 flow [2024-06-27 18:29:50,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 281 transitions, 3050 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 18:29:50,494 INFO L231 Difference]: Finished difference. Result has 195 places, 255 transitions, 2528 flow [2024-06-27 18:29:50,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2436, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2528, PETRI_PLACES=195, PETRI_TRANSITIONS=255} [2024-06-27 18:29:50,494 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 139 predicate places. [2024-06-27 18:29:50,494 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 255 transitions, 2528 flow [2024-06-27 18:29:50,495 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 18:29:50,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:29:50,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:29:50,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 18:29:50,495 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:29:50,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:29:50,495 INFO L85 PathProgramCache]: Analyzing trace with hash -894108101, now seen corresponding path program 1 times [2024-06-27 18:29:50,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:29:50,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987193445] [2024-06-27 18:29:50,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:29:50,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:29:50,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:29:51,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:29:51,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:29:51,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987193445] [2024-06-27 18:29:51,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987193445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:29:51,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:29:51,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:29:51,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016583922] [2024-06-27 18:29:51,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:29:51,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:29:51,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:29:51,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:29:51,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:29:51,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:29:51,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 255 transitions, 2528 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:29:51,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:29:51,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:29:51,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:29:53,375 INFO L124 PetriNetUnfolderBase]: 7169/11143 cut-off events. [2024-06-27 18:29:53,375 INFO L125 PetriNetUnfolderBase]: For 434815/434825 co-relation queries the response was YES. [2024-06-27 18:29:53,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65364 conditions, 11143 events. 7169/11143 cut-off events. For 434815/434825 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 70922 event pairs, 1486 based on Foata normal form. 12/10950 useless extension candidates. Maximal degree in co-relation 65277. Up to 9302 conditions per place. [2024-06-27 18:29:53,500 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 252 selfloop transitions, 70 changer transitions 0/334 dead transitions. [2024-06-27 18:29:53,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 334 transitions, 3693 flow [2024-06-27 18:29:53,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:29:53,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:29:53,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-06-27 18:29:53,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5266666666666666 [2024-06-27 18:29:53,502 INFO L175 Difference]: Start difference. First operand has 195 places, 255 transitions, 2528 flow. Second operand 9 states and 237 transitions. [2024-06-27 18:29:53,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 334 transitions, 3693 flow [2024-06-27 18:29:53,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 334 transitions, 3625 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 18:29:53,998 INFO L231 Difference]: Finished difference. Result has 200 places, 274 transitions, 2841 flow [2024-06-27 18:29:53,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2460, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2841, PETRI_PLACES=200, PETRI_TRANSITIONS=274} [2024-06-27 18:29:53,998 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 144 predicate places. [2024-06-27 18:29:53,998 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 274 transitions, 2841 flow [2024-06-27 18:29:53,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:29:53,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:29:53,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:29:53,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 18:29:53,999 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:29:53,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:29:53,999 INFO L85 PathProgramCache]: Analyzing trace with hash -296454021, now seen corresponding path program 2 times [2024-06-27 18:29:54,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:29:54,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946659207] [2024-06-27 18:29:54,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:29:54,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:29:54,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:29:55,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:29:55,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:29:55,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946659207] [2024-06-27 18:29:55,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946659207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:29:55,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:29:55,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:29:55,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3288644] [2024-06-27 18:29:55,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:29:55,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:29:55,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:29:55,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:29:55,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:29:55,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:29:55,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 274 transitions, 2841 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:29:55,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:29:55,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:29:55,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:29:56,841 INFO L124 PetriNetUnfolderBase]: 7183/10896 cut-off events. [2024-06-27 18:29:56,842 INFO L125 PetriNetUnfolderBase]: For 453988/453998 co-relation queries the response was YES. [2024-06-27 18:29:56,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66610 conditions, 10896 events. 7183/10896 cut-off events. For 453988/453998 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 66713 event pairs, 1628 based on Foata normal form. 12/10807 useless extension candidates. Maximal degree in co-relation 66521. Up to 9534 conditions per place. [2024-06-27 18:29:56,958 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 202 selfloop transitions, 121 changer transitions 0/335 dead transitions. [2024-06-27 18:29:56,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 335 transitions, 3745 flow [2024-06-27 18:29:56,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:29:56,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:29:56,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-27 18:29:56,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-06-27 18:29:56,960 INFO L175 Difference]: Start difference. First operand has 200 places, 274 transitions, 2841 flow. Second operand 9 states and 234 transitions. [2024-06-27 18:29:56,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 335 transitions, 3745 flow [2024-06-27 18:29:57,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 335 transitions, 3646 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-27 18:29:57,445 INFO L231 Difference]: Finished difference. Result has 205 places, 278 transitions, 3078 flow [2024-06-27 18:29:57,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2756, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3078, PETRI_PLACES=205, PETRI_TRANSITIONS=278} [2024-06-27 18:29:57,446 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 149 predicate places. [2024-06-27 18:29:57,446 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 278 transitions, 3078 flow [2024-06-27 18:29:57,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:29:57,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:29:57,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:29:57,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 18:29:57,446 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:29:57,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:29:57,447 INFO L85 PathProgramCache]: Analyzing trace with hash -296453866, now seen corresponding path program 1 times [2024-06-27 18:29:57,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:29:57,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400825734] [2024-06-27 18:29:57,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:29:57,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:29:57,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:29:58,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:29:58,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:29:58,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400825734] [2024-06-27 18:29:58,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400825734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:29:58,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:29:58,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:29:58,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347150320] [2024-06-27 18:29:58,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:29:58,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:29:58,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:29:58,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:29:58,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:29:58,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:29:58,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 278 transitions, 3078 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:29:58,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:29:58,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:29:58,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:30:00,685 INFO L124 PetriNetUnfolderBase]: 7288/11345 cut-off events. [2024-06-27 18:30:00,685 INFO L125 PetriNetUnfolderBase]: For 477044/477054 co-relation queries the response was YES. [2024-06-27 18:30:00,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68985 conditions, 11345 events. 7288/11345 cut-off events. For 477044/477054 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 72415 event pairs, 1722 based on Foata normal form. 9/11126 useless extension candidates. Maximal degree in co-relation 68894. Up to 9093 conditions per place. [2024-06-27 18:30:00,808 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 258 selfloop transitions, 99 changer transitions 0/369 dead transitions. [2024-06-27 18:30:00,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 369 transitions, 4336 flow [2024-06-27 18:30:00,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:30:00,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:30:00,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 317 transitions. [2024-06-27 18:30:00,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283333333333333 [2024-06-27 18:30:00,809 INFO L175 Difference]: Start difference. First operand has 205 places, 278 transitions, 3078 flow. Second operand 12 states and 317 transitions. [2024-06-27 18:30:00,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 369 transitions, 4336 flow [2024-06-27 18:30:01,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 369 transitions, 4054 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-27 18:30:01,323 INFO L231 Difference]: Finished difference. Result has 210 places, 284 transitions, 3099 flow [2024-06-27 18:30:01,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2796, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3099, PETRI_PLACES=210, PETRI_TRANSITIONS=284} [2024-06-27 18:30:01,323 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 154 predicate places. [2024-06-27 18:30:01,324 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 284 transitions, 3099 flow [2024-06-27 18:30:01,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:01,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:30:01,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:30:01,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 18:30:01,324 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:30:01,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:30:01,325 INFO L85 PathProgramCache]: Analyzing trace with hash -296457741, now seen corresponding path program 3 times [2024-06-27 18:30:01,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:30:01,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645550416] [2024-06-27 18:30:01,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:30:01,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:30:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:30:02,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:30:02,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:30:02,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645550416] [2024-06-27 18:30:02,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645550416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:30:02,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:30:02,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:30:02,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562428019] [2024-06-27 18:30:02,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:30:02,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:30:02,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:30:02,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:30:02,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:30:02,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:30:02,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 284 transitions, 3099 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:02,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:30:02,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:30:02,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:30:04,403 INFO L124 PetriNetUnfolderBase]: 7352/11052 cut-off events. [2024-06-27 18:30:04,403 INFO L125 PetriNetUnfolderBase]: For 497311/497321 co-relation queries the response was YES. [2024-06-27 18:30:04,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70487 conditions, 11052 events. 7352/11052 cut-off events. For 497311/497321 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 67007 event pairs, 1647 based on Foata normal form. 12/10980 useless extension candidates. Maximal degree in co-relation 70395. Up to 9688 conditions per place. [2024-06-27 18:30:04,529 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 211 selfloop transitions, 127 changer transitions 0/350 dead transitions. [2024-06-27 18:30:04,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 350 transitions, 4091 flow [2024-06-27 18:30:04,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:30:04,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:30:04,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-06-27 18:30:04,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5244444444444445 [2024-06-27 18:30:04,530 INFO L175 Difference]: Start difference. First operand has 210 places, 284 transitions, 3099 flow. Second operand 9 states and 236 transitions. [2024-06-27 18:30:04,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 350 transitions, 4091 flow [2024-06-27 18:30:05,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 350 transitions, 3959 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-27 18:30:05,131 INFO L231 Difference]: Finished difference. Result has 213 places, 292 transitions, 3389 flow [2024-06-27 18:30:05,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2967, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3389, PETRI_PLACES=213, PETRI_TRANSITIONS=292} [2024-06-27 18:30:05,132 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 157 predicate places. [2024-06-27 18:30:05,132 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 292 transitions, 3389 flow [2024-06-27 18:30:05,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:05,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:30:05,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:30:05,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 18:30:05,133 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:30:05,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:30:05,133 INFO L85 PathProgramCache]: Analyzing trace with hash -209618061, now seen corresponding path program 4 times [2024-06-27 18:30:05,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:30:05,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856877258] [2024-06-27 18:30:05,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:30:05,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:30:05,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:30:06,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:30:06,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:30:06,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856877258] [2024-06-27 18:30:06,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856877258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:30:06,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:30:06,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:30:06,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794739021] [2024-06-27 18:30:06,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:30:06,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:30:06,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:30:06,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:30:06,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:30:06,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:30:06,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 292 transitions, 3389 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:06,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:30:06,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:30:06,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:30:08,415 INFO L124 PetriNetUnfolderBase]: 7407/11196 cut-off events. [2024-06-27 18:30:08,416 INFO L125 PetriNetUnfolderBase]: For 522453/522463 co-relation queries the response was YES. [2024-06-27 18:30:08,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72569 conditions, 11196 events. 7407/11196 cut-off events. For 522453/522463 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 68344 event pairs, 1615 based on Foata normal form. 12/11103 useless extension candidates. Maximal degree in co-relation 72474. Up to 10063 conditions per place. [2024-06-27 18:30:08,544 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 259 selfloop transitions, 79 changer transitions 0/350 dead transitions. [2024-06-27 18:30:08,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 350 transitions, 4319 flow [2024-06-27 18:30:08,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:30:08,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:30:08,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-06-27 18:30:08,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5133333333333333 [2024-06-27 18:30:08,546 INFO L175 Difference]: Start difference. First operand has 213 places, 292 transitions, 3389 flow. Second operand 9 states and 231 transitions. [2024-06-27 18:30:08,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 350 transitions, 4319 flow [2024-06-27 18:30:09,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 350 transitions, 4095 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-27 18:30:09,017 INFO L231 Difference]: Finished difference. Result has 217 places, 296 transitions, 3421 flow [2024-06-27 18:30:09,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3165, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3421, PETRI_PLACES=217, PETRI_TRANSITIONS=296} [2024-06-27 18:30:09,018 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 161 predicate places. [2024-06-27 18:30:09,018 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 296 transitions, 3421 flow [2024-06-27 18:30:09,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:09,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:30:09,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:30:09,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 18:30:09,018 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:30:09,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:30:09,018 INFO L85 PathProgramCache]: Analyzing trace with hash -805538621, now seen corresponding path program 5 times [2024-06-27 18:30:09,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:30:09,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424177902] [2024-06-27 18:30:09,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:30:09,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:30:09,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:30:10,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:30:10,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:30:10,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424177902] [2024-06-27 18:30:10,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424177902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:30:10,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:30:10,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:30:10,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303079743] [2024-06-27 18:30:10,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:30:10,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:30:10,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:30:10,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:30:10,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:30:10,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:30:10,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 296 transitions, 3421 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:10,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:30:10,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:30:10,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:30:12,184 INFO L124 PetriNetUnfolderBase]: 7452/11263 cut-off events. [2024-06-27 18:30:12,184 INFO L125 PetriNetUnfolderBase]: For 543862/543872 co-relation queries the response was YES. [2024-06-27 18:30:12,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73948 conditions, 11263 events. 7452/11263 cut-off events. For 543862/543872 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 68770 event pairs, 1624 based on Foata normal form. 12/11170 useless extension candidates. Maximal degree in co-relation 73851. Up to 10090 conditions per place. [2024-06-27 18:30:12,299 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 253 selfloop transitions, 89 changer transitions 0/354 dead transitions. [2024-06-27 18:30:12,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 354 transitions, 4367 flow [2024-06-27 18:30:12,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:30:12,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:30:12,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-27 18:30:12,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5155555555555555 [2024-06-27 18:30:12,300 INFO L175 Difference]: Start difference. First operand has 217 places, 296 transitions, 3421 flow. Second operand 9 states and 232 transitions. [2024-06-27 18:30:12,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 354 transitions, 4367 flow [2024-06-27 18:30:12,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 354 transitions, 4151 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-27 18:30:12,778 INFO L231 Difference]: Finished difference. Result has 219 places, 300 transitions, 3489 flow [2024-06-27 18:30:12,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3205, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3489, PETRI_PLACES=219, PETRI_TRANSITIONS=300} [2024-06-27 18:30:12,778 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 163 predicate places. [2024-06-27 18:30:12,778 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 300 transitions, 3489 flow [2024-06-27 18:30:12,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:12,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:30:12,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:30:12,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 18:30:12,779 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:30:12,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:30:12,779 INFO L85 PathProgramCache]: Analyzing trace with hash -209765931, now seen corresponding path program 6 times [2024-06-27 18:30:12,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:30:12,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192382117] [2024-06-27 18:30:12,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:30:12,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:30:12,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:30:13,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:30:13,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:30:13,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192382117] [2024-06-27 18:30:13,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192382117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:30:13,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:30:13,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:30:13,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549563997] [2024-06-27 18:30:13,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:30:13,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:30:13,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:30:13,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:30:13,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:30:13,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:30:13,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 300 transitions, 3489 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:13,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:30:13,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:30:13,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:30:15,827 INFO L124 PetriNetUnfolderBase]: 7512/11639 cut-off events. [2024-06-27 18:30:15,827 INFO L125 PetriNetUnfolderBase]: For 567972/567982 co-relation queries the response was YES. [2024-06-27 18:30:15,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75503 conditions, 11639 events. 7512/11639 cut-off events. For 567972/567982 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 74200 event pairs, 1887 based on Foata normal form. 12/11439 useless extension candidates. Maximal degree in co-relation 75405. Up to 10137 conditions per place. [2024-06-27 18:30:15,968 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 290 selfloop transitions, 54 changer transitions 0/356 dead transitions. [2024-06-27 18:30:15,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 356 transitions, 4391 flow [2024-06-27 18:30:15,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:30:15,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:30:15,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-27 18:30:15,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5155555555555555 [2024-06-27 18:30:15,969 INFO L175 Difference]: Start difference. First operand has 219 places, 300 transitions, 3489 flow. Second operand 9 states and 232 transitions. [2024-06-27 18:30:15,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 356 transitions, 4391 flow [2024-06-27 18:30:16,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 356 transitions, 3995 flow, removed 50 selfloop flow, removed 8 redundant places. [2024-06-27 18:30:16,711 INFO L231 Difference]: Finished difference. Result has 220 places, 302 transitions, 3252 flow [2024-06-27 18:30:16,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3093, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3252, PETRI_PLACES=220, PETRI_TRANSITIONS=302} [2024-06-27 18:30:16,711 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 164 predicate places. [2024-06-27 18:30:16,711 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 302 transitions, 3252 flow [2024-06-27 18:30:16,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:16,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:30:16,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:30:16,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 18:30:16,712 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:30:16,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:30:16,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1864271598, now seen corresponding path program 1 times [2024-06-27 18:30:16,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:30:16,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435942225] [2024-06-27 18:30:16,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:30:16,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:30:16,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:30:17,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:30:17,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:30:17,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435942225] [2024-06-27 18:30:17,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435942225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:30:17,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:30:17,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:30:17,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316207565] [2024-06-27 18:30:17,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:30:17,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:30:17,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:30:17,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:30:17,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:30:17,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:30:17,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 302 transitions, 3252 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 18:30:17,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:30:17,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:30:17,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:30:19,231 INFO L124 PetriNetUnfolderBase]: 7589/11856 cut-off events. [2024-06-27 18:30:19,231 INFO L125 PetriNetUnfolderBase]: For 588744/588761 co-relation queries the response was YES. [2024-06-27 18:30:19,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75095 conditions, 11856 events. 7589/11856 cut-off events. For 588744/588761 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 76275 event pairs, 2094 based on Foata normal form. 17/11641 useless extension candidates. Maximal degree in co-relation 74997. Up to 10237 conditions per place. [2024-06-27 18:30:19,377 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 266 selfloop transitions, 43 changer transitions 0/359 dead transitions. [2024-06-27 18:30:19,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 359 transitions, 4396 flow [2024-06-27 18:30:19,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:30:19,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:30:19,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-27 18:30:19,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257142857142857 [2024-06-27 18:30:19,378 INFO L175 Difference]: Start difference. First operand has 220 places, 302 transitions, 3252 flow. Second operand 7 states and 184 transitions. [2024-06-27 18:30:19,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 359 transitions, 4396 flow [2024-06-27 18:30:20,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 359 transitions, 4264 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 18:30:20,067 INFO L231 Difference]: Finished difference. Result has 223 places, 321 transitions, 3475 flow [2024-06-27 18:30:20,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3120, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3475, PETRI_PLACES=223, PETRI_TRANSITIONS=321} [2024-06-27 18:30:20,067 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 167 predicate places. [2024-06-27 18:30:20,067 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 321 transitions, 3475 flow [2024-06-27 18:30:20,068 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 18:30:20,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:30:20,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:30:20,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 18:30:20,068 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:30:20,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:30:20,068 INFO L85 PathProgramCache]: Analyzing trace with hash -930706957, now seen corresponding path program 7 times [2024-06-27 18:30:20,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:30:20,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172249588] [2024-06-27 18:30:20,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:30:20,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:30:20,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:30:21,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:30:21,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:30:21,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172249588] [2024-06-27 18:30:21,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172249588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:30:21,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:30:21,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:30:21,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612153433] [2024-06-27 18:30:21,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:30:21,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:30:21,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:30:21,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:30:21,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:30:21,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:30:21,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 321 transitions, 3475 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:21,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:30:21,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:30:21,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:30:23,226 INFO L124 PetriNetUnfolderBase]: 7618/11798 cut-off events. [2024-06-27 18:30:23,226 INFO L125 PetriNetUnfolderBase]: For 617098/617108 co-relation queries the response was YES. [2024-06-27 18:30:23,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78358 conditions, 11798 events. 7618/11798 cut-off events. For 617098/617108 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 75274 event pairs, 1522 based on Foata normal form. 12/11600 useless extension candidates. Maximal degree in co-relation 78257. Up to 10184 conditions per place. [2024-06-27 18:30:23,370 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 310 selfloop transitions, 63 changer transitions 0/385 dead transitions. [2024-06-27 18:30:23,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 385 transitions, 4665 flow [2024-06-27 18:30:23,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:30:23,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:30:23,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2024-06-27 18:30:23,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5377777777777778 [2024-06-27 18:30:23,371 INFO L175 Difference]: Start difference. First operand has 223 places, 321 transitions, 3475 flow. Second operand 9 states and 242 transitions. [2024-06-27 18:30:23,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 385 transitions, 4665 flow [2024-06-27 18:30:24,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 385 transitions, 4601 flow, removed 31 selfloop flow, removed 1 redundant places. [2024-06-27 18:30:24,035 INFO L231 Difference]: Finished difference. Result has 231 places, 323 transitions, 3588 flow [2024-06-27 18:30:24,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3411, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3588, PETRI_PLACES=231, PETRI_TRANSITIONS=323} [2024-06-27 18:30:24,036 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 175 predicate places. [2024-06-27 18:30:24,036 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 323 transitions, 3588 flow [2024-06-27 18:30:24,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:24,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:30:24,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:30:24,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 18:30:24,036 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:30:24,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:30:24,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1526479492, now seen corresponding path program 2 times [2024-06-27 18:30:24,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:30:24,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289776010] [2024-06-27 18:30:24,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:30:24,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:30:24,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:30:25,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:30:25,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:30:25,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289776010] [2024-06-27 18:30:25,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289776010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:30:25,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:30:25,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:30:25,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379100698] [2024-06-27 18:30:25,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:30:25,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:30:25,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:30:25,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:30:25,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:30:25,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:30:25,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 323 transitions, 3588 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:25,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:30:25,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:30:25,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:30:27,770 INFO L124 PetriNetUnfolderBase]: 8275/12848 cut-off events. [2024-06-27 18:30:27,770 INFO L125 PetriNetUnfolderBase]: For 654832/654842 co-relation queries the response was YES. [2024-06-27 18:30:27,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86229 conditions, 12848 events. 8275/12848 cut-off events. For 654832/654842 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 82926 event pairs, 1916 based on Foata normal form. 9/12629 useless extension candidates. Maximal degree in co-relation 86125. Up to 10613 conditions per place. [2024-06-27 18:30:27,936 INFO L140 encePairwiseOnDemand]: 34/50 looper letters, 345 selfloop transitions, 95 changer transitions 0/452 dead transitions. [2024-06-27 18:30:27,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 452 transitions, 5713 flow [2024-06-27 18:30:27,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:30:27,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:30:27,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 305 transitions. [2024-06-27 18:30:27,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5083333333333333 [2024-06-27 18:30:27,938 INFO L175 Difference]: Start difference. First operand has 231 places, 323 transitions, 3588 flow. Second operand 12 states and 305 transitions. [2024-06-27 18:30:27,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 452 transitions, 5713 flow [2024-06-27 18:30:28,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 452 transitions, 5491 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 18:30:28,727 INFO L231 Difference]: Finished difference. Result has 244 places, 373 transitions, 4471 flow [2024-06-27 18:30:28,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3425, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4471, PETRI_PLACES=244, PETRI_TRANSITIONS=373} [2024-06-27 18:30:28,727 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 188 predicate places. [2024-06-27 18:30:28,727 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 373 transitions, 4471 flow [2024-06-27 18:30:28,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:28,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:30:28,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:30:28,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 18:30:28,728 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:30:28,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:30:28,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1526479647, now seen corresponding path program 8 times [2024-06-27 18:30:28,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:30:28,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74902238] [2024-06-27 18:30:28,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:30:28,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:30:28,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:30:29,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:30:29,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:30:29,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74902238] [2024-06-27 18:30:29,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74902238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:30:29,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:30:29,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:30:29,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448731710] [2024-06-27 18:30:29,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:30:29,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:30:29,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:30:29,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:30:29,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:30:29,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:30:29,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 373 transitions, 4471 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:29,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:30:29,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:30:29,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:30:32,188 INFO L124 PetriNetUnfolderBase]: 8311/12515 cut-off events. [2024-06-27 18:30:32,188 INFO L125 PetriNetUnfolderBase]: For 674288/674307 co-relation queries the response was YES. [2024-06-27 18:30:32,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88040 conditions, 12515 events. 8311/12515 cut-off events. For 674288/674307 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 76932 event pairs, 1626 based on Foata normal form. 20/12441 useless extension candidates. Maximal degree in co-relation 87928. Up to 10991 conditions per place. [2024-06-27 18:30:32,357 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 287 selfloop transitions, 137 changer transitions 0/436 dead transitions. [2024-06-27 18:30:32,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 436 transitions, 5625 flow [2024-06-27 18:30:32,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:30:32,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:30:32,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 239 transitions. [2024-06-27 18:30:32,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311111111111111 [2024-06-27 18:30:32,358 INFO L175 Difference]: Start difference. First operand has 244 places, 373 transitions, 4471 flow. Second operand 9 states and 239 transitions. [2024-06-27 18:30:32,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 436 transitions, 5625 flow [2024-06-27 18:30:33,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 436 transitions, 5591 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-06-27 18:30:33,551 INFO L231 Difference]: Finished difference. Result has 252 places, 377 transitions, 4832 flow [2024-06-27 18:30:33,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4437, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4832, PETRI_PLACES=252, PETRI_TRANSITIONS=377} [2024-06-27 18:30:33,551 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 196 predicate places. [2024-06-27 18:30:33,552 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 377 transitions, 4832 flow [2024-06-27 18:30:33,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:33,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:30:33,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:30:33,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 18:30:33,552 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:30:33,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:30:33,552 INFO L85 PathProgramCache]: Analyzing trace with hash -930559087, now seen corresponding path program 9 times [2024-06-27 18:30:33,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:30:33,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284587350] [2024-06-27 18:30:33,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:30:33,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:30:33,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:30:34,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:30:34,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:30:34,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284587350] [2024-06-27 18:30:34,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284587350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:30:34,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:30:34,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:30:34,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297845775] [2024-06-27 18:30:34,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:30:34,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:30:34,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:30:34,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:30:34,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:30:34,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:30:34,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 377 transitions, 4832 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:34,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:30:34,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:30:34,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:30:37,345 INFO L124 PetriNetUnfolderBase]: 8374/13031 cut-off events. [2024-06-27 18:30:37,345 INFO L125 PetriNetUnfolderBase]: For 704960/704979 co-relation queries the response was YES. [2024-06-27 18:30:37,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90724 conditions, 13031 events. 8374/13031 cut-off events. For 704960/704979 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 84611 event pairs, 1932 based on Foata normal form. 20/12803 useless extension candidates. Maximal degree in co-relation 90609. Up to 11324 conditions per place. [2024-06-27 18:30:37,524 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 354 selfloop transitions, 68 changer transitions 0/434 dead transitions. [2024-06-27 18:30:37,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 434 transitions, 5918 flow [2024-06-27 18:30:37,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:30:37,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:30:37,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-06-27 18:30:37,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5177777777777778 [2024-06-27 18:30:37,525 INFO L175 Difference]: Start difference. First operand has 252 places, 377 transitions, 4832 flow. Second operand 9 states and 233 transitions. [2024-06-27 18:30:37,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 434 transitions, 5918 flow [2024-06-27 18:30:38,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 434 transitions, 5567 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-27 18:30:38,763 INFO L231 Difference]: Finished difference. Result has 254 places, 379 transitions, 4679 flow [2024-06-27 18:30:38,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4481, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4679, PETRI_PLACES=254, PETRI_TRANSITIONS=379} [2024-06-27 18:30:38,763 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 198 predicate places. [2024-06-27 18:30:38,764 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 379 transitions, 4679 flow [2024-06-27 18:30:38,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:38,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:30:38,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:30:38,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 18:30:38,764 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:30:38,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:30:38,764 INFO L85 PathProgramCache]: Analyzing trace with hash -555451248, now seen corresponding path program 3 times [2024-06-27 18:30:38,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:30:38,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218715397] [2024-06-27 18:30:38,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:30:38,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:30:38,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:30:39,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:30:39,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:30:39,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218715397] [2024-06-27 18:30:39,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218715397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:30:39,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:30:39,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:30:39,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519312605] [2024-06-27 18:30:39,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:30:39,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:30:39,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:30:39,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:30:39,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:30:39,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:30:39,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 379 transitions, 4679 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:39,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:30:39,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:30:39,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:30:42,177 INFO L124 PetriNetUnfolderBase]: 8462/12677 cut-off events. [2024-06-27 18:30:42,177 INFO L125 PetriNetUnfolderBase]: For 732056/732073 co-relation queries the response was YES. [2024-06-27 18:30:42,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91125 conditions, 12677 events. 8462/12677 cut-off events. For 732056/732073 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 77639 event pairs, 1406 based on Foata normal form. 19/12621 useless extension candidates. Maximal degree in co-relation 91009. Up to 10625 conditions per place. [2024-06-27 18:30:42,372 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 304 selfloop transitions, 143 changer transitions 0/459 dead transitions. [2024-06-27 18:30:42,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 459 transitions, 6378 flow [2024-06-27 18:30:42,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:30:42,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:30:42,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 240 transitions. [2024-06-27 18:30:42,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-27 18:30:42,373 INFO L175 Difference]: Start difference. First operand has 254 places, 379 transitions, 4679 flow. Second operand 9 states and 240 transitions. [2024-06-27 18:30:42,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 459 transitions, 6378 flow [2024-06-27 18:30:43,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 459 transitions, 6214 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 18:30:43,695 INFO L231 Difference]: Finished difference. Result has 258 places, 398 transitions, 5232 flow [2024-06-27 18:30:43,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4515, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5232, PETRI_PLACES=258, PETRI_TRANSITIONS=398} [2024-06-27 18:30:43,696 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 202 predicate places. [2024-06-27 18:30:43,696 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 398 transitions, 5232 flow [2024-06-27 18:30:43,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:43,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:30:43,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:30:43,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 18:30:43,696 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:30:43,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:30:43,697 INFO L85 PathProgramCache]: Analyzing trace with hash -925190972, now seen corresponding path program 4 times [2024-06-27 18:30:43,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:30:43,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553446870] [2024-06-27 18:30:43,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:30:43,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:30:43,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:30:44,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:30:44,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:30:44,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553446870] [2024-06-27 18:30:44,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553446870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:30:44,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:30:44,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:30:44,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879727558] [2024-06-27 18:30:44,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:30:44,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:30:44,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:30:44,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:30:44,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:30:44,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:30:44,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 398 transitions, 5232 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:44,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:30:44,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:30:44,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:30:47,182 INFO L124 PetriNetUnfolderBase]: 8547/12796 cut-off events. [2024-06-27 18:30:47,182 INFO L125 PetriNetUnfolderBase]: For 763543/763560 co-relation queries the response was YES. [2024-06-27 18:30:47,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94943 conditions, 12796 events. 8547/12796 cut-off events. For 763543/763560 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 78393 event pairs, 1463 based on Foata normal form. 19/12739 useless extension candidates. Maximal degree in co-relation 94825. Up to 10735 conditions per place. [2024-06-27 18:30:47,355 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 316 selfloop transitions, 144 changer transitions 0/472 dead transitions. [2024-06-27 18:30:47,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 472 transitions, 6858 flow [2024-06-27 18:30:47,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:30:47,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:30:47,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2024-06-27 18:30:47,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5377777777777778 [2024-06-27 18:30:47,356 INFO L175 Difference]: Start difference. First operand has 258 places, 398 transitions, 5232 flow. Second operand 9 states and 242 transitions. [2024-06-27 18:30:47,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 472 transitions, 6858 flow [2024-06-27 18:30:48,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 472 transitions, 6545 flow, removed 126 selfloop flow, removed 3 redundant places. [2024-06-27 18:30:48,870 INFO L231 Difference]: Finished difference. Result has 264 places, 410 transitions, 5489 flow [2024-06-27 18:30:48,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4963, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5489, PETRI_PLACES=264, PETRI_TRANSITIONS=410} [2024-06-27 18:30:48,870 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 208 predicate places. [2024-06-27 18:30:48,871 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 410 transitions, 5489 flow [2024-06-27 18:30:48,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:48,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:30:48,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:30:48,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 18:30:48,871 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:30:48,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:30:48,872 INFO L85 PathProgramCache]: Analyzing trace with hash -925196707, now seen corresponding path program 10 times [2024-06-27 18:30:48,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:30:48,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234552467] [2024-06-27 18:30:48,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:30:48,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:30:48,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:30:50,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:30:50,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:30:50,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234552467] [2024-06-27 18:30:50,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234552467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:30:50,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:30:50,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:30:50,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881228813] [2024-06-27 18:30:50,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:30:50,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:30:50,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:30:50,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:30:50,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:30:50,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:30:50,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 410 transitions, 5489 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:50,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:30:50,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:30:50,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:30:52,818 INFO L124 PetriNetUnfolderBase]: 8635/13430 cut-off events. [2024-06-27 18:30:52,818 INFO L125 PetriNetUnfolderBase]: For 788549/788566 co-relation queries the response was YES. [2024-06-27 18:30:52,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98096 conditions, 13430 events. 8635/13430 cut-off events. For 788549/788566 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 87672 event pairs, 1999 based on Foata normal form. 18/13194 useless extension candidates. Maximal degree in co-relation 97976. Up to 11688 conditions per place. [2024-06-27 18:30:53,023 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 391 selfloop transitions, 61 changer transitions 0/464 dead transitions. [2024-06-27 18:30:53,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 464 transitions, 6629 flow [2024-06-27 18:30:53,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:30:53,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:30:53,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-27 18:30:53,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5088888888888888 [2024-06-27 18:30:53,024 INFO L175 Difference]: Start difference. First operand has 264 places, 410 transitions, 5489 flow. Second operand 9 states and 229 transitions. [2024-06-27 18:30:53,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 464 transitions, 6629 flow [2024-06-27 18:30:54,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 464 transitions, 6339 flow, removed 64 selfloop flow, removed 4 redundant places. [2024-06-27 18:30:54,422 INFO L231 Difference]: Finished difference. Result has 269 places, 412 transitions, 5387 flow [2024-06-27 18:30:54,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5199, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5387, PETRI_PLACES=269, PETRI_TRANSITIONS=412} [2024-06-27 18:30:54,423 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 213 predicate places. [2024-06-27 18:30:54,423 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 412 transitions, 5387 flow [2024-06-27 18:30:54,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:54,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:30:54,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:30:54,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 18:30:54,424 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:30:54,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:30:54,424 INFO L85 PathProgramCache]: Analyzing trace with hash -925196552, now seen corresponding path program 5 times [2024-06-27 18:30:54,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:30:54,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170652684] [2024-06-27 18:30:54,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:30:54,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:30:54,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:30:55,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:30:55,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:30:55,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170652684] [2024-06-27 18:30:55,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170652684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:30:55,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:30:55,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:30:55,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555440853] [2024-06-27 18:30:55,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:30:55,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:30:55,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:30:55,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:30:55,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:30:55,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:30:55,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 412 transitions, 5387 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:55,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:30:55,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:30:55,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:30:57,914 INFO L124 PetriNetUnfolderBase]: 8702/13041 cut-off events. [2024-06-27 18:30:57,915 INFO L125 PetriNetUnfolderBase]: For 819935/819952 co-relation queries the response was YES. [2024-06-27 18:30:58,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98122 conditions, 13041 events. 8702/13041 cut-off events. For 819935/819952 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 80106 event pairs, 1406 based on Foata normal form. 19/12985 useless extension candidates. Maximal degree in co-relation 98001. Up to 10758 conditions per place. [2024-06-27 18:30:58,112 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 303 selfloop transitions, 168 changer transitions 0/483 dead transitions. [2024-06-27 18:30:58,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 483 transitions, 6992 flow [2024-06-27 18:30:58,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:30:58,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:30:58,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 243 transitions. [2024-06-27 18:30:58,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-06-27 18:30:58,114 INFO L175 Difference]: Start difference. First operand has 269 places, 412 transitions, 5387 flow. Second operand 9 states and 243 transitions. [2024-06-27 18:30:58,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 483 transitions, 6992 flow [2024-06-27 18:30:59,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 483 transitions, 6837 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 18:30:59,686 INFO L231 Difference]: Finished difference. Result has 272 places, 421 transitions, 5798 flow [2024-06-27 18:30:59,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5232, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5798, PETRI_PLACES=272, PETRI_TRANSITIONS=421} [2024-06-27 18:30:59,686 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 216 predicate places. [2024-06-27 18:30:59,686 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 421 transitions, 5798 flow [2024-06-27 18:30:59,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:30:59,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:30:59,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:30:59,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 18:30:59,687 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:30:59,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:30:59,687 INFO L85 PathProgramCache]: Analyzing trace with hash -897859018, now seen corresponding path program 1 times [2024-06-27 18:30:59,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:30:59,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251746273] [2024-06-27 18:30:59,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:30:59,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:30:59,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:31:00,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:31:00,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:31:00,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251746273] [2024-06-27 18:31:00,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251746273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:31:00,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:31:00,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:31:00,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743773355] [2024-06-27 18:31:00,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:31:00,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:31:00,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:31:00,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:31:00,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:31:00,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-06-27 18:31:00,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 421 transitions, 5798 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 18:31:00,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:31:00,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-06-27 18:31:00,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:31:02,937 INFO L124 PetriNetUnfolderBase]: 9575/14664 cut-off events. [2024-06-27 18:31:02,937 INFO L125 PetriNetUnfolderBase]: For 858190/858235 co-relation queries the response was YES. [2024-06-27 18:31:03,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106162 conditions, 14664 events. 9575/14664 cut-off events. For 858190/858235 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 93519 event pairs, 2471 based on Foata normal form. 41/14423 useless extension candidates. Maximal degree in co-relation 106040. Up to 13238 conditions per place. [2024-06-27 18:31:03,185 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 376 selfloop transitions, 29 changer transitions 0/461 dead transitions. [2024-06-27 18:31:03,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 461 transitions, 6958 flow [2024-06-27 18:31:03,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:31:03,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:31:03,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 18:31:03,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47714285714285715 [2024-06-27 18:31:03,186 INFO L175 Difference]: Start difference. First operand has 272 places, 421 transitions, 5798 flow. Second operand 7 states and 167 transitions. [2024-06-27 18:31:03,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 461 transitions, 6958 flow [2024-06-27 18:31:04,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 461 transitions, 6487 flow, removed 73 selfloop flow, removed 7 redundant places. [2024-06-27 18:31:04,406 INFO L231 Difference]: Finished difference. Result has 273 places, 431 transitions, 5539 flow [2024-06-27 18:31:04,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5327, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5539, PETRI_PLACES=273, PETRI_TRANSITIONS=431} [2024-06-27 18:31:04,406 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 217 predicate places. [2024-06-27 18:31:04,406 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 431 transitions, 5539 flow [2024-06-27 18:31:04,407 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 18:31:04,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:31:04,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:31:04,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 18:31:04,407 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:31:04,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:31:04,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1320899870, now seen corresponding path program 2 times [2024-06-27 18:31:04,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:31:04,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318867193] [2024-06-27 18:31:04,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:31:04,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:31:04,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:31:05,133 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 18:31:05,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:31:05,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318867193] [2024-06-27 18:31:05,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318867193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:31:05,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:31:05,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:31:05,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606313258] [2024-06-27 18:31:05,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:31:05,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:31:05,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:31:05,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:31:05,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:31:05,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:31:05,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 431 transitions, 5539 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 18:31:05,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:31:05,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:31:05,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:31:07,818 INFO L124 PetriNetUnfolderBase]: 9129/14218 cut-off events. [2024-06-27 18:31:07,818 INFO L125 PetriNetUnfolderBase]: For 883553/883612 co-relation queries the response was YES. [2024-06-27 18:31:07,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103603 conditions, 14218 events. 9129/14218 cut-off events. For 883553/883612 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 92827 event pairs, 2277 based on Foata normal form. 44/13969 useless extension candidates. Maximal degree in co-relation 103479. Up to 12172 conditions per place. [2024-06-27 18:31:08,028 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 356 selfloop transitions, 53 changer transitions 0/470 dead transitions. [2024-06-27 18:31:08,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 470 transitions, 6824 flow [2024-06-27 18:31:08,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:31:08,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:31:08,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 18:31:08,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5085714285714286 [2024-06-27 18:31:08,029 INFO L175 Difference]: Start difference. First operand has 273 places, 431 transitions, 5539 flow. Second operand 7 states and 178 transitions. [2024-06-27 18:31:08,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 470 transitions, 6824 flow [2024-06-27 18:31:09,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 470 transitions, 6773 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-27 18:31:09,412 INFO L231 Difference]: Finished difference. Result has 279 places, 439 transitions, 5728 flow [2024-06-27 18:31:09,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5488, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5728, PETRI_PLACES=279, PETRI_TRANSITIONS=439} [2024-06-27 18:31:09,413 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 223 predicate places. [2024-06-27 18:31:09,413 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 439 transitions, 5728 flow [2024-06-27 18:31:09,413 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 18:31:09,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:31:09,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:31:09,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 18:31:09,414 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:31:09,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:31:09,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1387568387, now seen corresponding path program 11 times [2024-06-27 18:31:09,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:31:09,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765881757] [2024-06-27 18:31:09,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:31:09,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:31:09,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:31:10,802 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 18:31:10,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:31:10,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765881757] [2024-06-27 18:31:10,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765881757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:31:10,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:31:10,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:31:10,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556879814] [2024-06-27 18:31:10,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:31:10,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:31:10,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:31:10,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:31:10,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:31:10,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:31:10,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 439 transitions, 5728 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:31:10,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:31:10,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:31:10,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:31:13,557 INFO L124 PetriNetUnfolderBase]: 8896/13918 cut-off events. [2024-06-27 18:31:13,557 INFO L125 PetriNetUnfolderBase]: For 893671/893693 co-relation queries the response was YES. [2024-06-27 18:31:13,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102752 conditions, 13918 events. 8896/13918 cut-off events. For 893671/893693 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 92113 event pairs, 2527 based on Foata normal form. 8/13665 useless extension candidates. Maximal degree in co-relation 102624. Up to 12403 conditions per place. [2024-06-27 18:31:13,769 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 446 selfloop transitions, 25 changer transitions 0/486 dead transitions. [2024-06-27 18:31:13,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 486 transitions, 6834 flow [2024-06-27 18:31:13,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:31:13,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:31:13,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-27 18:31:13,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2024-06-27 18:31:13,770 INFO L175 Difference]: Start difference. First operand has 279 places, 439 transitions, 5728 flow. Second operand 9 states and 220 transitions. [2024-06-27 18:31:13,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 486 transitions, 6834 flow [2024-06-27 18:31:15,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 486 transitions, 6693 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-27 18:31:15,469 INFO L231 Difference]: Finished difference. Result has 285 places, 439 transitions, 5644 flow [2024-06-27 18:31:15,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5587, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5644, PETRI_PLACES=285, PETRI_TRANSITIONS=439} [2024-06-27 18:31:15,470 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 229 predicate places. [2024-06-27 18:31:15,470 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 439 transitions, 5644 flow [2024-06-27 18:31:15,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:31:15,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:31:15,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:31:15,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 18:31:15,470 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:31:15,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:31:15,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1387568542, now seen corresponding path program 6 times [2024-06-27 18:31:15,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:31:15,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34480557] [2024-06-27 18:31:15,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:31:15,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:31:15,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:31:16,492 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 18:31:16,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:31:16,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34480557] [2024-06-27 18:31:16,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34480557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:31:16,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:31:16,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:31:16,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963820709] [2024-06-27 18:31:16,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:31:16,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:31:16,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:31:16,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:31:16,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:31:16,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:31:16,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 439 transitions, 5644 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:31:16,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:31:16,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:31:16,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:31:19,768 INFO L124 PetriNetUnfolderBase]: 8982/14078 cut-off events. [2024-06-27 18:31:19,768 INFO L125 PetriNetUnfolderBase]: For 922579/922601 co-relation queries the response was YES. [2024-06-27 18:31:19,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103929 conditions, 14078 events. 8982/14078 cut-off events. For 922579/922601 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 93682 event pairs, 2378 based on Foata normal form. 8/13816 useless extension candidates. Maximal degree in co-relation 103800. Up to 12064 conditions per place. [2024-06-27 18:31:19,934 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 423 selfloop transitions, 73 changer transitions 0/511 dead transitions. [2024-06-27 18:31:19,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 511 transitions, 7855 flow [2024-06-27 18:31:19,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:31:19,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:31:19,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-06-27 18:31:19,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5266666666666666 [2024-06-27 18:31:19,935 INFO L175 Difference]: Start difference. First operand has 285 places, 439 transitions, 5644 flow. Second operand 9 states and 237 transitions. [2024-06-27 18:31:19,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 511 transitions, 7855 flow [2024-06-27 18:31:21,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 511 transitions, 7796 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 18:31:21,135 INFO L231 Difference]: Finished difference. Result has 289 places, 451 transitions, 6067 flow [2024-06-27 18:31:21,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5585, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6067, PETRI_PLACES=289, PETRI_TRANSITIONS=451} [2024-06-27 18:31:21,135 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 233 predicate places. [2024-06-27 18:31:21,135 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 451 transitions, 6067 flow [2024-06-27 18:31:21,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:31:21,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:31:21,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:31:21,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 18:31:21,136 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:31:21,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:31:21,137 INFO L85 PathProgramCache]: Analyzing trace with hash -383793280, now seen corresponding path program 1 times [2024-06-27 18:31:21,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:31:21,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335285140] [2024-06-27 18:31:21,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:31:21,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:31:21,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:31:22,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:31:22,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:31:22,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335285140] [2024-06-27 18:31:22,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335285140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:31:22,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:31:22,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:31:22,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588889712] [2024-06-27 18:31:22,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:31:22,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:31:22,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:31:22,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:31:22,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:31:22,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-06-27 18:31:22,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 451 transitions, 6067 flow. Second operand has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:31:22,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:31:22,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-06-27 18:31:22,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:31:25,772 INFO L124 PetriNetUnfolderBase]: 9756/15155 cut-off events. [2024-06-27 18:31:25,772 INFO L125 PetriNetUnfolderBase]: For 975788/975804 co-relation queries the response was YES. [2024-06-27 18:31:25,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112001 conditions, 15155 events. 9756/15155 cut-off events. For 975788/975804 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 99159 event pairs, 2896 based on Foata normal form. 2/14850 useless extension candidates. Maximal degree in co-relation 111870. Up to 13574 conditions per place. [2024-06-27 18:31:25,986 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 456 selfloop transitions, 37 changer transitions 0/506 dead transitions. [2024-06-27 18:31:25,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 506 transitions, 7333 flow [2024-06-27 18:31:25,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:31:25,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:31:25,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-27 18:31:25,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2024-06-27 18:31:25,987 INFO L175 Difference]: Start difference. First operand has 289 places, 451 transitions, 6067 flow. Second operand 9 states and 215 transitions. [2024-06-27 18:31:25,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 506 transitions, 7333 flow [2024-06-27 18:31:27,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 506 transitions, 6946 flow, removed 117 selfloop flow, removed 5 redundant places. [2024-06-27 18:31:27,644 INFO L231 Difference]: Finished difference. Result has 293 places, 457 transitions, 5907 flow [2024-06-27 18:31:27,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5730, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5907, PETRI_PLACES=293, PETRI_TRANSITIONS=457} [2024-06-27 18:31:27,645 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 237 predicate places. [2024-06-27 18:31:27,645 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 457 transitions, 5907 flow [2024-06-27 18:31:27,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:31:27,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:31:27,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:31:27,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 18:31:27,646 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:31:27,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:31:27,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1826570996, now seen corresponding path program 7 times [2024-06-27 18:31:27,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:31:27,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80037831] [2024-06-27 18:31:27,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:31:27,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:31:27,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:31:28,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:31:28,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:31:28,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80037831] [2024-06-27 18:31:28,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80037831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:31:28,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:31:28,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:31:28,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831552914] [2024-06-27 18:31:28,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:31:28,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:31:28,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:31:28,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:31:28,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:31:28,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:31:28,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 457 transitions, 5907 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:31:28,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:31:28,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:31:28,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:31:32,081 INFO L124 PetriNetUnfolderBase]: 9099/14278 cut-off events. [2024-06-27 18:31:32,081 INFO L125 PetriNetUnfolderBase]: For 969541/969563 co-relation queries the response was YES. [2024-06-27 18:31:32,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106576 conditions, 14278 events. 9099/14278 cut-off events. For 969541/969563 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 95474 event pairs, 2454 based on Foata normal form. 12/14010 useless extension candidates. Maximal degree in co-relation 106443. Up to 12433 conditions per place. [2024-06-27 18:31:32,260 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 456 selfloop transitions, 52 changer transitions 0/523 dead transitions. [2024-06-27 18:31:32,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 523 transitions, 7588 flow [2024-06-27 18:31:32,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:31:32,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:31:32,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 228 transitions. [2024-06-27 18:31:32,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5066666666666667 [2024-06-27 18:31:32,261 INFO L175 Difference]: Start difference. First operand has 293 places, 457 transitions, 5907 flow. Second operand 9 states and 228 transitions. [2024-06-27 18:31:32,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 523 transitions, 7588 flow [2024-06-27 18:31:33,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 523 transitions, 7512 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 18:31:33,520 INFO L231 Difference]: Finished difference. Result has 297 places, 469 transitions, 6232 flow [2024-06-27 18:31:33,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5831, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6232, PETRI_PLACES=297, PETRI_TRANSITIONS=469} [2024-06-27 18:31:33,521 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 241 predicate places. [2024-06-27 18:31:33,521 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 469 transitions, 6232 flow [2024-06-27 18:31:33,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:31:33,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:31:33,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:31:33,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 18:31:33,521 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:31:33,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:31:33,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1387574122, now seen corresponding path program 8 times [2024-06-27 18:31:33,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:31:33,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089676422] [2024-06-27 18:31:33,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:31:33,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:31:33,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:31:34,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:31:34,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:31:34,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089676422] [2024-06-27 18:31:34,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089676422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:31:34,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:31:34,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:31:34,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015374187] [2024-06-27 18:31:34,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:31:34,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:31:34,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:31:34,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:31:34,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:31:34,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:31:34,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 469 transitions, 6232 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:31:34,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:31:34,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:31:34,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:31:37,871 INFO L124 PetriNetUnfolderBase]: 9165/14360 cut-off events. [2024-06-27 18:31:37,871 INFO L125 PetriNetUnfolderBase]: For 992510/992532 co-relation queries the response was YES. [2024-06-27 18:31:38,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108418 conditions, 14360 events. 9165/14360 cut-off events. For 992510/992532 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 95987 event pairs, 2418 based on Foata normal form. 8/14090 useless extension candidates. Maximal degree in co-relation 108282. Up to 12403 conditions per place. [2024-06-27 18:31:38,245 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 441 selfloop transitions, 78 changer transitions 0/534 dead transitions. [2024-06-27 18:31:38,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 534 transitions, 7934 flow [2024-06-27 18:31:38,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:31:38,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:31:38,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-27 18:31:38,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5155555555555555 [2024-06-27 18:31:38,246 INFO L175 Difference]: Start difference. First operand has 297 places, 469 transitions, 6232 flow. Second operand 9 states and 232 transitions. [2024-06-27 18:31:38,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 534 transitions, 7934 flow [2024-06-27 18:31:39,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 534 transitions, 7754 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-27 18:31:39,840 INFO L231 Difference]: Finished difference. Result has 301 places, 478 transitions, 6442 flow [2024-06-27 18:31:39,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=6052, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6442, PETRI_PLACES=301, PETRI_TRANSITIONS=478} [2024-06-27 18:31:39,841 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 245 predicate places. [2024-06-27 18:31:39,841 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 478 transitions, 6442 flow [2024-06-27 18:31:39,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:31:39,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:31:39,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:31:39,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 18:31:39,842 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:31:39,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:31:39,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1387775932, now seen corresponding path program 9 times [2024-06-27 18:31:39,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:31:39,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589763592] [2024-06-27 18:31:39,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:31:39,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:31:39,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:31:40,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:31:40,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:31:40,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589763592] [2024-06-27 18:31:40,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589763592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:31:40,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:31:40,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:31:40,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125765616] [2024-06-27 18:31:40,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:31:40,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:31:40,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:31:40,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:31:40,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:31:41,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:31:41,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 478 transitions, 6442 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:31:41,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:31:41,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:31:41,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:31:44,286 INFO L124 PetriNetUnfolderBase]: 9155/14360 cut-off events. [2024-06-27 18:31:44,286 INFO L125 PetriNetUnfolderBase]: For 1007106/1007128 co-relation queries the response was YES. [2024-06-27 18:31:44,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108040 conditions, 14360 events. 9155/14360 cut-off events. For 1007106/1007128 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 96053 event pairs, 2431 based on Foata normal form. 8/14087 useless extension candidates. Maximal degree in co-relation 107903. Up to 12389 conditions per place. [2024-06-27 18:31:44,502 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 445 selfloop transitions, 74 changer transitions 0/534 dead transitions. [2024-06-27 18:31:44,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 534 transitions, 7938 flow [2024-06-27 18:31:44,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:31:44,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:31:44,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-06-27 18:31:44,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5177777777777778 [2024-06-27 18:31:44,503 INFO L175 Difference]: Start difference. First operand has 301 places, 478 transitions, 6442 flow. Second operand 9 states and 233 transitions. [2024-06-27 18:31:44,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 534 transitions, 7938 flow [2024-06-27 18:31:46,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 534 transitions, 7580 flow, removed 107 selfloop flow, removed 6 redundant places. [2024-06-27 18:31:46,365 INFO L231 Difference]: Finished difference. Result has 304 places, 478 transitions, 6244 flow [2024-06-27 18:31:46,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=6084, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6244, PETRI_PLACES=304, PETRI_TRANSITIONS=478} [2024-06-27 18:31:46,366 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 248 predicate places. [2024-06-27 18:31:46,366 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 478 transitions, 6244 flow [2024-06-27 18:31:46,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:31:46,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:31:46,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:31:46,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 18:31:46,366 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:31:46,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:31:46,367 INFO L85 PathProgramCache]: Analyzing trace with hash -878489136, now seen corresponding path program 2 times [2024-06-27 18:31:46,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:31:46,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248118689] [2024-06-27 18:31:46,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:31:46,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:31:46,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:31:46,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:31:46,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:31:46,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248118689] [2024-06-27 18:31:46,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248118689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:31:46,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:31:46,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:31:46,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215573330] [2024-06-27 18:31:46,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:31:46,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:31:46,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:31:46,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:31:46,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:31:47,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-06-27 18:31:47,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 478 transitions, 6244 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 18:31:47,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:31:47,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-06-27 18:31:47,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:31:50,345 INFO L124 PetriNetUnfolderBase]: 9993/15499 cut-off events. [2024-06-27 18:31:50,345 INFO L125 PetriNetUnfolderBase]: For 1039364/1039444 co-relation queries the response was YES. [2024-06-27 18:31:50,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112610 conditions, 15499 events. 9993/15499 cut-off events. For 1039364/1039444 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 101689 event pairs, 3198 based on Foata normal form. 71/15271 useless extension candidates. Maximal degree in co-relation 112472. Up to 13921 conditions per place. [2024-06-27 18:31:50,569 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 426 selfloop transitions, 18 changer transitions 0/500 dead transitions. [2024-06-27 18:31:50,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 500 transitions, 7236 flow [2024-06-27 18:31:50,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:31:50,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:31:50,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-27 18:31:50,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44 [2024-06-27 18:31:50,570 INFO L175 Difference]: Start difference. First operand has 304 places, 478 transitions, 6244 flow. Second operand 7 states and 154 transitions. [2024-06-27 18:31:50,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 500 transitions, 7236 flow