./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2018/Problem13.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4408bbdf-2f59-4548-86e5-921eeb822b93/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4408bbdf-2f59-4548-86e5-921eeb822b93/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4408bbdf-2f59-4548-86e5-921eeb822b93/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4408bbdf-2f59-4548-86e5-921eeb822b93/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2018/Problem13.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4408bbdf-2f59-4548-86e5-921eeb822b93/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4408bbdf-2f59-4548-86e5-921eeb822b93/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 39257b2f2790dc593eb015569e826a332fcc3e3cd918d00daa305f748c1b3d75 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 13:53:29,396 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 13:53:29,398 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 13:53:29,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 13:53:29,416 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 13:53:29,417 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 13:53:29,418 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 13:53:29,419 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 13:53:29,421 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 13:53:29,422 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 13:53:29,422 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 13:53:29,424 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 13:53:29,424 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 13:53:29,425 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 13:53:29,426 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 13:53:29,427 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 13:53:29,428 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 13:53:29,429 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 13:53:29,430 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 13:53:29,432 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 13:53:29,434 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 13:53:29,435 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 13:53:29,436 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 13:53:29,437 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 13:53:29,440 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 13:53:29,440 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 13:53:29,441 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 13:53:29,442 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 13:53:29,442 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 13:53:29,443 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 13:53:29,443 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 13:53:29,444 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 13:53:29,445 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 13:53:29,445 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 13:53:29,446 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 13:53:29,447 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 13:53:29,447 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 13:53:29,447 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 13:53:29,448 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 13:53:29,448 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 13:53:29,449 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 13:53:29,450 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4408bbdf-2f59-4548-86e5-921eeb822b93/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 13:53:29,469 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 13:53:29,469 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 13:53:29,469 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 13:53:29,470 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 13:53:29,470 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 13:53:29,471 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 13:53:29,471 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 13:53:29,471 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 13:53:29,472 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 13:53:29,472 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 13:53:29,472 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 13:53:29,472 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 13:53:29,472 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 13:53:29,473 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 13:53:29,473 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 13:53:29,473 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 13:53:29,473 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 13:53:29,473 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 13:53:29,473 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 13:53:29,474 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 13:53:29,474 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 13:53:29,474 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 13:53:29,474 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 13:53:29,474 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 13:53:29,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:53:29,475 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 13:53:29,475 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 13:53:29,475 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 13:53:29,475 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 13:53:29,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 13:53:29,476 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 13:53:29,476 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 13:53:29,476 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 13:53:29,476 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 13:53:29,476 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 13:53:29,477 INFO L138 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4408bbdf-2f59-4548-86e5-921eeb822b93/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4408bbdf-2f59-4548-86e5-921eeb822b93/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39257b2f2790dc593eb015569e826a332fcc3e3cd918d00daa305f748c1b3d75 [2022-12-13 13:53:29,663 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 13:53:29,682 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 13:53:29,685 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 13:53:29,686 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 13:53:29,686 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 13:53:29,687 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4408bbdf-2f59-4548-86e5-921eeb822b93/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/eca-rers2018/Problem13.c [2022-12-13 13:53:32,243 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 13:53:33,118 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 13:53:33,118 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4408bbdf-2f59-4548-86e5-921eeb822b93/sv-benchmarks/c/eca-rers2018/Problem13.c [2022-12-13 13:53:33,229 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4408bbdf-2f59-4548-86e5-921eeb822b93/bin/uautomizer-uyxdKDjOR8/data/c6e68d519/28c00f0257614179b12968b2fed40713/FLAGf30ac1b28 [2022-12-13 13:53:33,239 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4408bbdf-2f59-4548-86e5-921eeb822b93/bin/uautomizer-uyxdKDjOR8/data/c6e68d519/28c00f0257614179b12968b2fed40713 [2022-12-13 13:53:33,242 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 13:53:33,243 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 13:53:33,244 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 13:53:33,244 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 13:53:33,248 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 13:53:33,248 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:53:33" (1/1) ... [2022-12-13 13:53:33,249 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63048058 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:53:33, skipping insertion in model container [2022-12-13 13:53:33,250 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:53:33" (1/1) ... [2022-12-13 13:53:33,257 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 13:53:33,796 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 13:53:34,007 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4408bbdf-2f59-4548-86e5-921eeb822b93/sv-benchmarks/c/eca-rers2018/Problem13.c[778,791] [2022-12-13 13:53:34,031 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4408bbdf-2f59-4548-86e5-921eeb822b93/sv-benchmarks/c/eca-rers2018/Problem13.c[817,830] [2022-12-13 13:53:47,098 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:53:47,111 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 13:53:47,119 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4408bbdf-2f59-4548-86e5-921eeb822b93/sv-benchmarks/c/eca-rers2018/Problem13.c[778,791] [2022-12-13 13:53:47,119 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4408bbdf-2f59-4548-86e5-921eeb822b93/sv-benchmarks/c/eca-rers2018/Problem13.c[817,830] [2022-12-13 13:53:48,171 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:53:48,692 INFO L208 MainTranslator]: Completed translation [2022-12-13 13:53:48,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:53:48 WrapperNode [2022-12-13 13:53:48,692 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 13:53:48,693 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 13:53:48,693 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 13:53:48,693 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 13:53:48,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:53:48" (1/1) ... [2022-12-13 13:53:48,940 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:53:48" (1/1) ... [2022-12-13 13:53:49,670 INFO L138 Inliner]: procedures = 710, calls = 701, calls flagged for inlining = 597, calls inlined = 597, statements flattened = 108769 [2022-12-13 13:53:49,671 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 13:53:49,671 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 13:53:49,671 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 13:53:49,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 13:53:49,680 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:53:48" (1/1) ... [2022-12-13 13:53:49,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:53:48" (1/1) ... [2022-12-13 13:53:49,768 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:53:48" (1/1) ... [2022-12-13 13:53:49,768 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:53:48" (1/1) ... [2022-12-13 13:53:50,151 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:53:48" (1/1) ... [2022-12-13 13:53:50,227 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:53:48" (1/1) ... [2022-12-13 13:53:50,298 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:53:48" (1/1) ... [2022-12-13 13:53:50,350 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:53:48" (1/1) ... [2022-12-13 13:53:50,626 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 13:53:50,627 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 13:53:50,627 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 13:53:50,627 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 13:53:50,628 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:53:48" (1/1) ... [2022-12-13 13:53:50,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:53:50,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4408bbdf-2f59-4548-86e5-921eeb822b93/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:53:50,651 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4408bbdf-2f59-4548-86e5-921eeb822b93/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 13:53:50,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4408bbdf-2f59-4548-86e5-921eeb822b93/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 13:53:50,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 13:53:50,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 13:53:50,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 13:53:50,680 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_a [2022-12-13 13:53:50,680 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_a [2022-12-13 13:53:50,680 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_b [2022-12-13 13:53:50,680 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_b [2022-12-13 13:53:50,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 13:53:50,965 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 13:53:50,966 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 13:54:05,669 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 13:54:05,690 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 13:54:05,690 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-13 13:54:05,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:54:05 BoogieIcfgContainer [2022-12-13 13:54:05,694 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 13:54:05,696 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 13:54:05,696 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 13:54:05,698 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 13:54:05,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 01:53:33" (1/3) ... [2022-12-13 13:54:05,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a1119de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:54:05, skipping insertion in model container [2022-12-13 13:54:05,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:53:48" (2/3) ... [2022-12-13 13:54:05,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a1119de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:54:05, skipping insertion in model container [2022-12-13 13:54:05,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:54:05" (3/3) ... [2022-12-13 13:54:05,700 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13.c [2022-12-13 13:54:05,713 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 13:54:05,714 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-13 13:54:05,790 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:54:05,795 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@4128fc82, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:54:05,795 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 13:54:05,805 INFO L276 IsEmpty]: Start isEmpty. Operand has 3533 states, 3428 states have (on average 1.8246791131855309) internal successors, (6255), 3430 states have internal predecessors, (6255), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2022-12-13 13:54:05,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-13 13:54:05,814 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:54:05,814 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:54:05,814 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:54:05,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:54:05,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1914797321, now seen corresponding path program 1 times [2022-12-13 13:54:05,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:54:05,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384365489] [2022-12-13 13:54:05,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:54:05,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:54:05,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:54:06,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:54:06,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:54:06,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384365489] [2022-12-13 13:54:06,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384365489] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:54:06,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:54:06,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:54:06,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219921136] [2022-12-13 13:54:06,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:54:06,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:54:06,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:54:06,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:54:06,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:54:06,238 INFO L87 Difference]: Start difference. First operand has 3533 states, 3428 states have (on average 1.8246791131855309) internal successors, (6255), 3430 states have internal predecessors, (6255), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:14,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:54:14,071 INFO L93 Difference]: Finished difference Result 9556 states and 17573 transitions. [2022-12-13 13:54:14,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:54:14,074 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-13 13:54:14,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:54:14,104 INFO L225 Difference]: With dead ends: 9556 [2022-12-13 13:54:14,105 INFO L226 Difference]: Without dead ends: 6016 [2022-12-13 13:54:14,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:54:14,117 INFO L413 NwaCegarLoop]: 6282 mSDtfsCounter, 4900 mSDsluCounter, 3321 mSDsCounter, 0 mSdLazyCounter, 7368 mSolverCounterSat, 613 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4900 SdHoareTripleChecker+Valid, 9603 SdHoareTripleChecker+Invalid, 7981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 613 IncrementalHoareTripleChecker+Valid, 7368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-12-13 13:54:14,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4900 Valid, 9603 Invalid, 7981 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [613 Valid, 7368 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2022-12-13 13:54:14,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6016 states. [2022-12-13 13:54:14,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6016 to 5245. [2022-12-13 13:54:14,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5245 states, 5143 states have (on average 1.7841726618705036) internal successors, (9176), 5242 states have internal predecessors, (9176), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:14,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5245 states to 5245 states and 9276 transitions. [2022-12-13 13:54:14,310 INFO L78 Accepts]: Start accepts. Automaton has 5245 states and 9276 transitions. Word has length 13 [2022-12-13 13:54:14,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:54:14,311 INFO L495 AbstractCegarLoop]: Abstraction has 5245 states and 9276 transitions. [2022-12-13 13:54:14,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:14,311 INFO L276 IsEmpty]: Start isEmpty. Operand 5245 states and 9276 transitions. [2022-12-13 13:54:14,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-13 13:54:14,316 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:54:14,316 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:54:14,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 13:54:14,317 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:54:14,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:54:14,318 INFO L85 PathProgramCache]: Analyzing trace with hash -873779178, now seen corresponding path program 1 times [2022-12-13 13:54:14,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:54:14,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267998548] [2022-12-13 13:54:14,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:54:14,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:54:14,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:54:14,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:54:14,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:54:14,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267998548] [2022-12-13 13:54:14,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267998548] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:54:14,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:54:14,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:54:14,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047918234] [2022-12-13 13:54:14,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:54:14,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:54:14,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:54:14,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:54:14,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:54:14,538 INFO L87 Difference]: Start difference. First operand 5245 states and 9276 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:20,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:54:20,177 INFO L93 Difference]: Finished difference Result 11853 states and 20876 transitions. [2022-12-13 13:54:20,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:54:20,178 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-12-13 13:54:20,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:54:20,192 INFO L225 Difference]: With dead ends: 11853 [2022-12-13 13:54:20,192 INFO L226 Difference]: Without dead ends: 6610 [2022-12-13 13:54:20,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:54:20,199 INFO L413 NwaCegarLoop]: 6516 mSDtfsCounter, 1948 mSDsluCounter, 3296 mSDsCounter, 0 mSdLazyCounter, 4502 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1948 SdHoareTripleChecker+Valid, 9812 SdHoareTripleChecker+Invalid, 4757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 4502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-12-13 13:54:20,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1948 Valid, 9812 Invalid, 4757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 4502 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-12-13 13:54:20,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6610 states. [2022-12-13 13:54:20,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6610 to 6115. [2022-12-13 13:54:20,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6115 states, 6013 states have (on average 1.7490437385664395) internal successors, (10517), 6112 states have internal predecessors, (10517), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:20,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6115 states to 6115 states and 10617 transitions. [2022-12-13 13:54:20,311 INFO L78 Accepts]: Start accepts. Automaton has 6115 states and 10617 transitions. Word has length 22 [2022-12-13 13:54:20,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:54:20,311 INFO L495 AbstractCegarLoop]: Abstraction has 6115 states and 10617 transitions. [2022-12-13 13:54:20,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:20,312 INFO L276 IsEmpty]: Start isEmpty. Operand 6115 states and 10617 transitions. [2022-12-13 13:54:20,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-13 13:54:20,312 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:54:20,313 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:54:20,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 13:54:20,313 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:54:20,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:54:20,314 INFO L85 PathProgramCache]: Analyzing trace with hash -2028786272, now seen corresponding path program 1 times [2022-12-13 13:54:20,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:54:20,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679962949] [2022-12-13 13:54:20,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:54:20,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:54:20,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:54:20,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:54:20,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:54:20,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679962949] [2022-12-13 13:54:20,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679962949] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:54:20,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:54:20,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:54:20,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115376501] [2022-12-13 13:54:20,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:54:20,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:54:20,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:54:20,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:54:20,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:54:20,402 INFO L87 Difference]: Start difference. First operand 6115 states and 10617 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:20,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:54:20,750 INFO L93 Difference]: Finished difference Result 17808 states and 30942 transitions. [2022-12-13 13:54:20,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:54:20,751 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-12-13 13:54:20,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:54:20,779 INFO L225 Difference]: With dead ends: 17808 [2022-12-13 13:54:20,779 INFO L226 Difference]: Without dead ends: 11695 [2022-12-13 13:54:20,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:54:20,788 INFO L413 NwaCegarLoop]: 6287 mSDtfsCounter, 6151 mSDsluCounter, 6031 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6151 SdHoareTripleChecker+Valid, 12318 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 13:54:20,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6151 Valid, 12318 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 13:54:20,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11695 states. [2022-12-13 13:54:20,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11695 to 11596. [2022-12-13 13:54:20,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11596 states, 11494 states have (on average 1.7502175047851052) internal successors, (20117), 11593 states have internal predecessors, (20117), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:20,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11596 states to 11596 states and 20217 transitions. [2022-12-13 13:54:20,990 INFO L78 Accepts]: Start accepts. Automaton has 11596 states and 20217 transitions. Word has length 32 [2022-12-13 13:54:20,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:54:20,990 INFO L495 AbstractCegarLoop]: Abstraction has 11596 states and 20217 transitions. [2022-12-13 13:54:20,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:20,990 INFO L276 IsEmpty]: Start isEmpty. Operand 11596 states and 20217 transitions. [2022-12-13 13:54:20,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-13 13:54:20,991 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:54:20,991 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:54:20,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 13:54:20,992 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:54:20,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:54:20,993 INFO L85 PathProgramCache]: Analyzing trace with hash 342220768, now seen corresponding path program 1 times [2022-12-13 13:54:20,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:54:20,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813001809] [2022-12-13 13:54:20,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:54:20,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:54:21,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:54:21,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:54:21,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:54:21,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813001809] [2022-12-13 13:54:21,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813001809] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:54:21,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:54:21,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:54:21,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327950115] [2022-12-13 13:54:21,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:54:21,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:54:21,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:54:21,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:54:21,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:54:21,082 INFO L87 Difference]: Start difference. First operand 11596 states and 20217 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:22,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:54:22,022 INFO L93 Difference]: Finished difference Result 34103 states and 59476 transitions. [2022-12-13 13:54:22,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:54:22,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-12-13 13:54:22,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:54:22,057 INFO L225 Difference]: With dead ends: 34103 [2022-12-13 13:54:22,058 INFO L226 Difference]: Without dead ends: 22509 [2022-12-13 13:54:22,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:54:22,071 INFO L413 NwaCegarLoop]: 6759 mSDtfsCounter, 5698 mSDsluCounter, 5872 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5698 SdHoareTripleChecker+Valid, 12631 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 13:54:22,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5698 Valid, 12631 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 13:54:22,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22509 states. [2022-12-13 13:54:22,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22509 to 22396. [2022-12-13 13:54:22,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22396 states, 22294 states have (on average 1.7489459047277294) internal successors, (38991), 22393 states have internal predecessors, (38991), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:22,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22396 states to 22396 states and 39091 transitions. [2022-12-13 13:54:22,345 INFO L78 Accepts]: Start accepts. Automaton has 22396 states and 39091 transitions. Word has length 32 [2022-12-13 13:54:22,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:54:22,346 INFO L495 AbstractCegarLoop]: Abstraction has 22396 states and 39091 transitions. [2022-12-13 13:54:22,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:22,346 INFO L276 IsEmpty]: Start isEmpty. Operand 22396 states and 39091 transitions. [2022-12-13 13:54:22,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-13 13:54:22,347 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:54:22,347 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:54:22,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 13:54:22,348 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:54:22,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:54:22,348 INFO L85 PathProgramCache]: Analyzing trace with hash 2018208297, now seen corresponding path program 1 times [2022-12-13 13:54:22,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:54:22,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854937628] [2022-12-13 13:54:22,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:54:22,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:54:22,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:54:22,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:54:22,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:54:22,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854937628] [2022-12-13 13:54:22,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854937628] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:54:22,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:54:22,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:54:22,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48451215] [2022-12-13 13:54:22,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:54:22,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:54:22,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:54:22,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:54:22,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:54:22,431 INFO L87 Difference]: Start difference. First operand 22396 states and 39091 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:22,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:54:22,727 INFO L93 Difference]: Finished difference Result 66961 states and 116860 transitions. [2022-12-13 13:54:22,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:54:22,728 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-12-13 13:54:22,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:54:22,786 INFO L225 Difference]: With dead ends: 66961 [2022-12-13 13:54:22,786 INFO L226 Difference]: Without dead ends: 44567 [2022-12-13 13:54:22,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:54:22,808 INFO L413 NwaCegarLoop]: 6276 mSDtfsCounter, 6144 mSDsluCounter, 6212 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6144 SdHoareTripleChecker+Valid, 12488 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:54:22,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6144 Valid, 12488 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 13:54:22,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44567 states. [2022-12-13 13:54:23,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44567 to 44464. [2022-12-13 13:54:23,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44464 states, 44362 states have (on average 1.747937423921374) internal successors, (77542), 44461 states have internal predecessors, (77542), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:23,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44464 states to 44464 states and 77642 transitions. [2022-12-13 13:54:23,265 INFO L78 Accepts]: Start accepts. Automaton has 44464 states and 77642 transitions. Word has length 33 [2022-12-13 13:54:23,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:54:23,265 INFO L495 AbstractCegarLoop]: Abstraction has 44464 states and 77642 transitions. [2022-12-13 13:54:23,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:23,266 INFO L276 IsEmpty]: Start isEmpty. Operand 44464 states and 77642 transitions. [2022-12-13 13:54:23,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-13 13:54:23,267 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:54:23,267 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:54:23,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 13:54:23,267 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:54:23,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:54:23,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1860746363, now seen corresponding path program 1 times [2022-12-13 13:54:23,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:54:23,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318271453] [2022-12-13 13:54:23,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:54:23,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:54:23,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:54:23,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:54:23,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:54:23,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318271453] [2022-12-13 13:54:23,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318271453] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:54:23,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:54:23,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:54:23,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731479423] [2022-12-13 13:54:23,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:54:23,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:54:23,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:54:23,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:54:23,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:54:23,332 INFO L87 Difference]: Start difference. First operand 44464 states and 77642 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:27,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:54:27,926 INFO L93 Difference]: Finished difference Result 117524 states and 207236 transitions. [2022-12-13 13:54:27,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:54:27,926 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-12-13 13:54:27,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:54:28,050 INFO L225 Difference]: With dead ends: 117524 [2022-12-13 13:54:28,050 INFO L226 Difference]: Without dead ends: 73062 [2022-12-13 13:54:28,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:54:28,081 INFO L413 NwaCegarLoop]: 7496 mSDtfsCounter, 4604 mSDsluCounter, 4345 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 2122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4604 SdHoareTripleChecker+Valid, 11841 SdHoareTripleChecker+Invalid, 2924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2122 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-12-13 13:54:28,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4604 Valid, 11841 Invalid, 2924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2122 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-12-13 13:54:28,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73062 states. [2022-12-13 13:54:28,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73062 to 71260. [2022-12-13 13:54:28,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71260 states, 71158 states have (on average 1.7639337811630456) internal successors, (125518), 71257 states have internal predecessors, (125518), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:28,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71260 states to 71260 states and 125618 transitions. [2022-12-13 13:54:28,848 INFO L78 Accepts]: Start accepts. Automaton has 71260 states and 125618 transitions. Word has length 34 [2022-12-13 13:54:28,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:54:28,848 INFO L495 AbstractCegarLoop]: Abstraction has 71260 states and 125618 transitions. [2022-12-13 13:54:28,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:28,848 INFO L276 IsEmpty]: Start isEmpty. Operand 71260 states and 125618 transitions. [2022-12-13 13:54:28,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-13 13:54:28,850 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:54:28,850 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:54:28,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 13:54:28,850 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:54:28,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:54:28,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1849249746, now seen corresponding path program 1 times [2022-12-13 13:54:28,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:54:28,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784921462] [2022-12-13 13:54:28,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:54:28,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:54:28,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:54:28,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:54:28,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:54:28,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784921462] [2022-12-13 13:54:28,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784921462] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:54:28,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:54:28,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:54:28,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845179701] [2022-12-13 13:54:28,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:54:28,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:54:28,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:54:28,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:54:28,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:54:28,926 INFO L87 Difference]: Start difference. First operand 71260 states and 125618 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:29,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:54:29,841 INFO L93 Difference]: Finished difference Result 211126 states and 372228 transitions. [2022-12-13 13:54:29,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:54:29,841 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-12-13 13:54:29,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:54:30,026 INFO L225 Difference]: With dead ends: 211126 [2022-12-13 13:54:30,026 INFO L226 Difference]: Without dead ends: 139868 [2022-12-13 13:54:30,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:54:30,085 INFO L413 NwaCegarLoop]: 6345 mSDtfsCounter, 6023 mSDsluCounter, 6083 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6023 SdHoareTripleChecker+Valid, 12428 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 13:54:30,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6023 Valid, 12428 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 13:54:30,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139868 states. [2022-12-13 13:54:31,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139868 to 139762. [2022-12-13 13:54:31,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139762 states, 139660 states have (on average 1.7631390519833883) internal successors, (246240), 139759 states have internal predecessors, (246240), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:31,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139762 states to 139762 states and 246340 transitions. [2022-12-13 13:54:31,515 INFO L78 Accepts]: Start accepts. Automaton has 139762 states and 246340 transitions. Word has length 35 [2022-12-13 13:54:31,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:54:31,515 INFO L495 AbstractCegarLoop]: Abstraction has 139762 states and 246340 transitions. [2022-12-13 13:54:31,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:31,516 INFO L276 IsEmpty]: Start isEmpty. Operand 139762 states and 246340 transitions. [2022-12-13 13:54:31,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-13 13:54:31,517 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:54:31,517 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:54:31,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 13:54:31,517 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:54:31,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:54:31,518 INFO L85 PathProgramCache]: Analyzing trace with hash 900277528, now seen corresponding path program 1 times [2022-12-13 13:54:31,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:54:31,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917770096] [2022-12-13 13:54:31,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:54:31,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:54:31,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:54:31,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:54:31,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:54:31,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917770096] [2022-12-13 13:54:31,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917770096] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:54:31,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:54:31,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:54:31,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39299440] [2022-12-13 13:54:31,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:54:31,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:54:31,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:54:31,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:54:31,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:54:31,649 INFO L87 Difference]: Start difference. First operand 139762 states and 246340 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:40,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:54:40,268 INFO L93 Difference]: Finished difference Result 320985 states and 565547 transitions. [2022-12-13 13:54:40,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:54:40,269 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-12-13 13:54:40,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:54:40,499 INFO L225 Difference]: With dead ends: 320985 [2022-12-13 13:54:40,499 INFO L226 Difference]: Without dead ends: 181225 [2022-12-13 13:54:40,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:54:40,544 INFO L413 NwaCegarLoop]: 7251 mSDtfsCounter, 4585 mSDsluCounter, 3663 mSDsCounter, 0 mSdLazyCounter, 6645 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4585 SdHoareTripleChecker+Valid, 10914 SdHoareTripleChecker+Invalid, 7064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 6645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-12-13 13:54:40,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4585 Valid, 10914 Invalid, 7064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 6645 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2022-12-13 13:54:40,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181225 states. [2022-12-13 13:54:41,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181225 to 169162. [2022-12-13 13:54:42,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169162 states, 169060 states have (on average 1.747143026144564) internal successors, (295372), 169159 states have internal predecessors, (295372), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:42,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169162 states to 169162 states and 295472 transitions. [2022-12-13 13:54:42,353 INFO L78 Accepts]: Start accepts. Automaton has 169162 states and 295472 transitions. Word has length 36 [2022-12-13 13:54:42,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:54:42,353 INFO L495 AbstractCegarLoop]: Abstraction has 169162 states and 295472 transitions. [2022-12-13 13:54:42,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:42,353 INFO L276 IsEmpty]: Start isEmpty. Operand 169162 states and 295472 transitions. [2022-12-13 13:54:42,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-13 13:54:42,355 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:54:42,355 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:54:42,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 13:54:42,355 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:54:42,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:54:42,356 INFO L85 PathProgramCache]: Analyzing trace with hash 965683763, now seen corresponding path program 1 times [2022-12-13 13:54:42,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:54:42,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482465599] [2022-12-13 13:54:42,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:54:42,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:54:42,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:54:42,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:54:42,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:54:42,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482465599] [2022-12-13 13:54:42,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482465599] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:54:42,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:54:42,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:54:42,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008348491] [2022-12-13 13:54:42,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:54:42,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:54:42,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:54:42,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:54:42,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:54:42,410 INFO L87 Difference]: Start difference. First operand 169162 states and 295472 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:47,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:54:47,869 INFO L93 Difference]: Finished difference Result 400496 states and 702364 transitions. [2022-12-13 13:54:47,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:54:47,870 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-12-13 13:54:47,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:54:48,209 INFO L225 Difference]: With dead ends: 400496 [2022-12-13 13:54:48,209 INFO L226 Difference]: Without dead ends: 231336 [2022-12-13 13:54:48,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:54:48,378 INFO L413 NwaCegarLoop]: 9874 mSDtfsCounter, 4490 mSDsluCounter, 4418 mSDsCounter, 0 mSdLazyCounter, 1857 mSolverCounterSat, 894 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4490 SdHoareTripleChecker+Valid, 14292 SdHoareTripleChecker+Invalid, 2751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 894 IncrementalHoareTripleChecker+Valid, 1857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-12-13 13:54:48,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4490 Valid, 14292 Invalid, 2751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [894 Valid, 1857 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-12-13 13:54:48,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231336 states. [2022-12-13 13:54:50,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231336 to 222318. [2022-12-13 13:54:50,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222318 states, 222216 states have (on average 1.7468364114195198) internal successors, (388175), 222315 states have internal predecessors, (388175), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:51,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222318 states to 222318 states and 388275 transitions. [2022-12-13 13:54:51,010 INFO L78 Accepts]: Start accepts. Automaton has 222318 states and 388275 transitions. Word has length 37 [2022-12-13 13:54:51,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:54:51,010 INFO L495 AbstractCegarLoop]: Abstraction has 222318 states and 388275 transitions. [2022-12-13 13:54:51,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:51,011 INFO L276 IsEmpty]: Start isEmpty. Operand 222318 states and 388275 transitions. [2022-12-13 13:54:51,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-13 13:54:51,012 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:54:51,012 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:54:51,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 13:54:51,012 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:54:51,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:54:51,012 INFO L85 PathProgramCache]: Analyzing trace with hash -620431340, now seen corresponding path program 1 times [2022-12-13 13:54:51,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:54:51,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524473650] [2022-12-13 13:54:51,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:54:51,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:54:51,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:54:51,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:54:51,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:54:51,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524473650] [2022-12-13 13:54:51,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524473650] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:54:51,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:54:51,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:54:51,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250176607] [2022-12-13 13:54:51,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:54:51,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:54:51,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:54:51,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:54:51,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:54:51,134 INFO L87 Difference]: Start difference. First operand 222318 states and 388275 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:01,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:55:01,798 INFO L93 Difference]: Finished difference Result 591713 states and 1027305 transitions. [2022-12-13 13:55:01,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:55:01,799 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-12-13 13:55:01,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:55:02,301 INFO L225 Difference]: With dead ends: 591713 [2022-12-13 13:55:02,301 INFO L226 Difference]: Without dead ends: 369397 [2022-12-13 13:55:02,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:55:02,373 INFO L413 NwaCegarLoop]: 7308 mSDtfsCounter, 4470 mSDsluCounter, 3778 mSDsCounter, 0 mSdLazyCounter, 6381 mSolverCounterSat, 335 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4470 SdHoareTripleChecker+Valid, 11086 SdHoareTripleChecker+Invalid, 6716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 335 IncrementalHoareTripleChecker+Valid, 6381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-12-13 13:55:02,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4470 Valid, 11086 Invalid, 6716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [335 Valid, 6381 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2022-12-13 13:55:02,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369397 states. [2022-12-13 13:55:05,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369397 to 324178. [2022-12-13 13:55:05,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324178 states, 324076 states have (on average 1.7276256186820376) internal successors, (559882), 324175 states have internal predecessors, (559882), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:06,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324178 states to 324178 states and 559982 transitions. [2022-12-13 13:55:06,375 INFO L78 Accepts]: Start accepts. Automaton has 324178 states and 559982 transitions. Word has length 40 [2022-12-13 13:55:06,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:55:06,375 INFO L495 AbstractCegarLoop]: Abstraction has 324178 states and 559982 transitions. [2022-12-13 13:55:06,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:06,375 INFO L276 IsEmpty]: Start isEmpty. Operand 324178 states and 559982 transitions. [2022-12-13 13:55:06,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-13 13:55:06,377 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:55:06,377 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:55:06,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 13:55:06,377 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:55:06,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:55:06,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1470901934, now seen corresponding path program 1 times [2022-12-13 13:55:06,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:55:06,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255414263] [2022-12-13 13:55:06,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:55:06,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:55:06,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:55:06,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:55:06,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:55:06,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255414263] [2022-12-13 13:55:06,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255414263] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:55:06,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:55:06,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:55:06,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980078157] [2022-12-13 13:55:06,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:55:06,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:55:06,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:55:06,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:55:06,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:55:06,452 INFO L87 Difference]: Start difference. First operand 324178 states and 559982 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:12,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:55:12,619 INFO L93 Difference]: Finished difference Result 931562 states and 1607514 transitions. [2022-12-13 13:55:12,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:55:12,620 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-12-13 13:55:12,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:55:13,523 INFO L225 Difference]: With dead ends: 931562 [2022-12-13 13:55:13,523 INFO L226 Difference]: Without dead ends: 607386 [2022-12-13 13:55:13,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:55:13,731 INFO L413 NwaCegarLoop]: 8324 mSDtfsCounter, 5112 mSDsluCounter, 4888 mSDsCounter, 0 mSdLazyCounter, 1339 mSolverCounterSat, 713 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5112 SdHoareTripleChecker+Valid, 13212 SdHoareTripleChecker+Invalid, 2052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 713 IncrementalHoareTripleChecker+Valid, 1339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-12-13 13:55:13,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5112 Valid, 13212 Invalid, 2052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [713 Valid, 1339 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-12-13 13:55:14,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607386 states. [2022-12-13 13:55:19,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607386 to 602510. [2022-12-13 13:55:19,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602510 states, 602408 states have (on average 1.7116738157527789) internal successors, (1031126), 602507 states have internal predecessors, (1031126), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:20,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602510 states to 602510 states and 1031226 transitions. [2022-12-13 13:55:20,847 INFO L78 Accepts]: Start accepts. Automaton has 602510 states and 1031226 transitions. Word has length 40 [2022-12-13 13:55:20,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:55:20,847 INFO L495 AbstractCegarLoop]: Abstraction has 602510 states and 1031226 transitions. [2022-12-13 13:55:20,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:20,848 INFO L276 IsEmpty]: Start isEmpty. Operand 602510 states and 1031226 transitions. [2022-12-13 13:55:20,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-13 13:55:20,852 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:55:20,852 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:55:20,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 13:55:20,853 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:55:20,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:55:20,853 INFO L85 PathProgramCache]: Analyzing trace with hash 764582051, now seen corresponding path program 1 times [2022-12-13 13:55:20,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:55:20,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615322369] [2022-12-13 13:55:20,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:55:20,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:55:20,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:55:20,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:55:20,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:55:20,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615322369] [2022-12-13 13:55:20,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615322369] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:55:20,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:55:20,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:55:20,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237475427] [2022-12-13 13:55:20,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:55:20,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:55:20,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:55:20,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:55:20,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:55:20,934 INFO L87 Difference]: Start difference. First operand 602510 states and 1031226 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:29,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:55:29,355 INFO L93 Difference]: Finished difference Result 1594722 states and 2737486 transitions. [2022-12-13 13:55:29,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:55:29,356 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-12-13 13:55:29,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:55:31,011 INFO L225 Difference]: With dead ends: 1594722 [2022-12-13 13:55:31,011 INFO L226 Difference]: Without dead ends: 992214 [2022-12-13 13:55:31,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:55:31,218 INFO L413 NwaCegarLoop]: 10245 mSDtfsCounter, 5038 mSDsluCounter, 4867 mSDsCounter, 0 mSdLazyCounter, 1174 mSolverCounterSat, 808 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5038 SdHoareTripleChecker+Valid, 15112 SdHoareTripleChecker+Invalid, 1982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 808 IncrementalHoareTripleChecker+Valid, 1174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:55:31,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5038 Valid, 15112 Invalid, 1982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [808 Valid, 1174 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-12-13 13:55:32,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992214 states. [2022-12-13 13:55:40,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992214 to 983320. [2022-12-13 13:55:40,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983320 states, 983218 states have (on average 1.7146644996328384) internal successors, (1685889), 983317 states have internal predecessors, (1685889), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:43,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983320 states to 983320 states and 1685989 transitions. [2022-12-13 13:55:43,323 INFO L78 Accepts]: Start accepts. Automaton has 983320 states and 1685989 transitions. Word has length 43 [2022-12-13 13:55:43,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:55:43,324 INFO L495 AbstractCegarLoop]: Abstraction has 983320 states and 1685989 transitions. [2022-12-13 13:55:43,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:43,324 INFO L276 IsEmpty]: Start isEmpty. Operand 983320 states and 1685989 transitions. [2022-12-13 13:55:43,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-13 13:55:43,326 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:55:43,326 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:55:43,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 13:55:43,326 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:55:43,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:55:43,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1934151182, now seen corresponding path program 1 times [2022-12-13 13:55:43,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:55:43,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901219674] [2022-12-13 13:55:43,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:55:43,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:55:43,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:55:43,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:55:43,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:55:43,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901219674] [2022-12-13 13:55:43,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901219674] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:55:43,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:55:43,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:55:43,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639052635] [2022-12-13 13:55:43,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:55:43,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:55:43,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:55:43,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:55:43,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:55:43,385 INFO L87 Difference]: Start difference. First operand 983320 states and 1685989 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:55:56,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:55:56,112 INFO L93 Difference]: Finished difference Result 2815825 states and 4826626 transitions. [2022-12-13 13:55:56,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:55:56,113 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-12-13 13:55:56,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:55:59,583 INFO L225 Difference]: With dead ends: 2815825 [2022-12-13 13:55:59,583 INFO L226 Difference]: Without dead ends: 1832507 [2022-12-13 13:56:00,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:56:00,043 INFO L413 NwaCegarLoop]: 10333 mSDtfsCounter, 5059 mSDsluCounter, 4778 mSDsCounter, 0 mSdLazyCounter, 1308 mSolverCounterSat, 667 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5059 SdHoareTripleChecker+Valid, 15111 SdHoareTripleChecker+Invalid, 1975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 667 IncrementalHoareTripleChecker+Valid, 1308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-12-13 13:56:00,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5059 Valid, 15111 Invalid, 1975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [667 Valid, 1308 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-12-13 13:56:01,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832507 states.