./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.11.cil.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_f52b9f87-a911-4294-89dc-f2ca07a4859b/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52b9f87-a911-4294-89dc-f2ca07a4859b/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52b9f87-a911-4294-89dc-f2ca07a4859b/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52b9f87-a911-4294-89dc-f2ca07a4859b/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52b9f87-a911-4294-89dc-f2ca07a4859b/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52b9f87-a911-4294-89dc-f2ca07a4859b/bin/utaipan-gh47qXpMRh --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 940a677bfde7dbbc79e036121bd0ec6fd3518c0f58a02d336e5d42fafb098792 --- 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 [2022-12-14 09:57:30,085 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 09:57:30,087 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 09:57:30,099 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 09:57:30,099 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 09:57:30,100 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 09:57:30,101 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 09:57:30,102 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 09:57:30,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 09:57:30,103 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 09:57:30,104 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 09:57:30,104 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 09:57:30,105 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 09:57:30,105 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 09:57:30,106 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 09:57:30,107 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 09:57:30,107 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 09:57:30,108 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 09:57:30,109 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 09:57:30,110 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 09:57:30,111 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 09:57:30,113 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 09:57:30,114 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 09:57:30,115 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 09:57:30,117 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 09:57:30,117 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 09:57:30,117 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 09:57:30,118 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 09:57:30,118 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 09:57:30,119 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 09:57:30,119 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 09:57:30,119 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 09:57:30,120 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 09:57:30,120 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 09:57:30,121 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 09:57:30,121 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 09:57:30,121 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 09:57:30,122 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 09:57:30,122 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 09:57:30,122 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 09:57:30,122 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 09:57:30,123 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52b9f87-a911-4294-89dc-f2ca07a4859b/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 09:57:30,137 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 09:57:30,137 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 09:57:30,137 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 09:57:30,137 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 09:57:30,137 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 09:57:30,138 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 09:57:30,138 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 09:57:30,138 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 09:57:30,138 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 09:57:30,138 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 09:57:30,138 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 09:57:30,138 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 09:57:30,138 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 09:57:30,138 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 09:57:30,138 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 09:57:30,139 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 09:57:30,139 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 09:57:30,139 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 09:57:30,139 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 09:57:30,139 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 09:57:30,139 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 09:57:30,139 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 09:57:30,140 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 09:57:30,140 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 09:57:30,140 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 09:57:30,140 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 09:57:30,140 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 09:57:30,140 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 09:57:30,140 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 09:57:30,140 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 09:57:30,140 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 09:57:30,140 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 09:57:30,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:57:30,141 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 09:57:30,141 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 09:57:30,141 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 09:57:30,141 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 09:57:30,141 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 09:57:30,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 09:57:30,141 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 09:57:30,141 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 09:57:30,141 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_f52b9f87-a911-4294-89dc-f2ca07a4859b/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52b9f87-a911-4294-89dc-f2ca07a4859b/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 940a677bfde7dbbc79e036121bd0ec6fd3518c0f58a02d336e5d42fafb098792 [2022-12-14 09:57:30,306 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 09:57:30,326 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 09:57:30,329 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 09:57:30,330 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 09:57:30,330 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 09:57:30,331 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52b9f87-a911-4294-89dc-f2ca07a4859b/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/systemc/transmitter.11.cil.c [2022-12-14 09:57:32,900 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 09:57:33,075 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 09:57:33,076 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52b9f87-a911-4294-89dc-f2ca07a4859b/sv-benchmarks/c/systemc/transmitter.11.cil.c [2022-12-14 09:57:33,084 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52b9f87-a911-4294-89dc-f2ca07a4859b/bin/utaipan-gh47qXpMRh/data/e747127a1/c468f8fa0e524637b440153aa7c17dc4/FLAG61d0cbb6c [2022-12-14 09:57:33,094 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52b9f87-a911-4294-89dc-f2ca07a4859b/bin/utaipan-gh47qXpMRh/data/e747127a1/c468f8fa0e524637b440153aa7c17dc4 [2022-12-14 09:57:33,096 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 09:57:33,097 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 09:57:33,098 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 09:57:33,098 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 09:57:33,102 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 09:57:33,102 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:57:33" (1/1) ... [2022-12-14 09:57:33,103 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a1a529c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:57:33, skipping insertion in model container [2022-12-14 09:57:33,104 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:57:33" (1/1) ... [2022-12-14 09:57:33,111 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 09:57:33,148 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:57:33,268 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_f52b9f87-a911-4294-89dc-f2ca07a4859b/sv-benchmarks/c/systemc/transmitter.11.cil.c[706,719] [2022-12-14 09:57:33,377 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:57:33,390 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 09:57:33,401 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_f52b9f87-a911-4294-89dc-f2ca07a4859b/sv-benchmarks/c/systemc/transmitter.11.cil.c[706,719] [2022-12-14 09:57:33,448 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:57:33,467 INFO L208 MainTranslator]: Completed translation [2022-12-14 09:57:33,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:57:33 WrapperNode [2022-12-14 09:57:33,468 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 09:57:33,469 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 09:57:33,469 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 09:57:33,469 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 09:57:33,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:57:33" (1/1) ... [2022-12-14 09:57:33,489 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:57:33" (1/1) ... [2022-12-14 09:57:33,524 INFO L138 Inliner]: procedures = 50, calls = 63, calls flagged for inlining = 34, calls inlined = 34, statements flattened = 777 [2022-12-14 09:57:33,524 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 09:57:33,525 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 09:57:33,525 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 09:57:33,525 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 09:57:33,534 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:57:33" (1/1) ... [2022-12-14 09:57:33,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:57:33" (1/1) ... [2022-12-14 09:57:33,538 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:57:33" (1/1) ... [2022-12-14 09:57:33,538 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:57:33" (1/1) ... [2022-12-14 09:57:33,549 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:57:33" (1/1) ... [2022-12-14 09:57:33,558 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:57:33" (1/1) ... [2022-12-14 09:57:33,559 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:57:33" (1/1) ... [2022-12-14 09:57:33,561 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:57:33" (1/1) ... [2022-12-14 09:57:33,564 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 09:57:33,565 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 09:57:33,565 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 09:57:33,565 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 09:57:33,566 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:57:33" (1/1) ... [2022-12-14 09:57:33,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:57:33,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52b9f87-a911-4294-89dc-f2ca07a4859b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:57:33,589 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52b9f87-a911-4294-89dc-f2ca07a4859b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 09:57:33,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52b9f87-a911-4294-89dc-f2ca07a4859b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 09:57:33,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 09:57:33,619 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 09:57:33,620 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 09:57:33,620 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 09:57:33,620 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 09:57:33,620 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 09:57:33,620 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 09:57:33,620 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 09:57:33,620 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 09:57:33,620 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 09:57:33,621 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 09:57:33,621 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 09:57:33,621 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 09:57:33,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 09:57:33,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 09:57:33,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 09:57:33,711 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 09:57:33,713 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 09:57:34,264 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 09:57:34,519 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 09:57:34,519 INFO L300 CfgBuilder]: Removed 15 assume(true) statements. [2022-12-14 09:57:34,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:57:34 BoogieIcfgContainer [2022-12-14 09:57:34,521 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 09:57:34,523 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 09:57:34,523 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 09:57:34,525 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 09:57:34,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 09:57:33" (1/3) ... [2022-12-14 09:57:34,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51fba0b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:57:34, skipping insertion in model container [2022-12-14 09:57:34,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:57:33" (2/3) ... [2022-12-14 09:57:34,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51fba0b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:57:34, skipping insertion in model container [2022-12-14 09:57:34,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:57:34" (3/3) ... [2022-12-14 09:57:34,528 INFO L112 eAbstractionObserver]: Analyzing ICFG transmitter.11.cil.c [2022-12-14 09:57:34,544 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 09:57:34,544 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 09:57:34,589 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 09:57:34,594 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=FINITE_AUTOMATA, 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;@31b24d6c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 09:57:34,594 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 09:57:34,599 INFO L276 IsEmpty]: Start isEmpty. Operand has 175 states, 143 states have (on average 1.5594405594405594) internal successors, (223), 145 states have internal predecessors, (223), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-12-14 09:57:34,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 09:57:34,609 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:57:34,610 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, 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] [2022-12-14 09:57:34,610 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:57:34,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:57:34,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1917703750, now seen corresponding path program 1 times [2022-12-14 09:57:34,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:57:34,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590811586] [2022-12-14 09:57:34,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:57:34,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:57:34,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:57:34,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:57:34,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:57:34,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590811586] [2022-12-14 09:57:34,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590811586] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:57:34,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:57:34,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:57:34,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550913192] [2022-12-14 09:57:34,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:57:34,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:57:34,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:57:34,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:57:34,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:57:34,999 INFO L87 Difference]: Start difference. First operand has 175 states, 143 states have (on average 1.5594405594405594) internal successors, (223), 145 states have internal predecessors, (223), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 09:57:35,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:57:35,383 INFO L93 Difference]: Finished difference Result 512 states and 807 transitions. [2022-12-14 09:57:35,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:57:35,386 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 73 [2022-12-14 09:57:35,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:57:35,396 INFO L225 Difference]: With dead ends: 512 [2022-12-14 09:57:35,396 INFO L226 Difference]: Without dead ends: 338 [2022-12-14 09:57:35,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:57:35,404 INFO L413 NwaCegarLoop]: 417 mSDtfsCounter, 474 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:57:35,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 746 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:57:35,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-12-14 09:57:35,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 334. [2022-12-14 09:57:35,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 277 states have (on average 1.51985559566787) internal successors, (421), 279 states have internal predecessors, (421), 44 states have call successors, (44), 12 states have call predecessors, (44), 12 states have return successors, (44), 43 states have call predecessors, (44), 44 states have call successors, (44) [2022-12-14 09:57:35,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 509 transitions. [2022-12-14 09:57:35,470 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 509 transitions. Word has length 73 [2022-12-14 09:57:35,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:57:35,471 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 509 transitions. [2022-12-14 09:57:35,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 09:57:35,472 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 509 transitions. [2022-12-14 09:57:35,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 09:57:35,475 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:57:35,475 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, 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] [2022-12-14 09:57:35,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 09:57:35,475 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:57:35,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:57:35,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1340775109, now seen corresponding path program 1 times [2022-12-14 09:57:35,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:57:35,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131253459] [2022-12-14 09:57:35,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:57:35,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:57:35,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:57:35,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:57:35,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:57:35,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131253459] [2022-12-14 09:57:35,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131253459] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:57:35,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:57:35,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:57:35,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277768419] [2022-12-14 09:57:35,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:57:35,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:57:35,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:57:35,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:57:35,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:57:35,654 INFO L87 Difference]: Start difference. First operand 334 states and 509 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 09:57:35,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:57:35,917 INFO L93 Difference]: Finished difference Result 983 states and 1550 transitions. [2022-12-14 09:57:35,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:57:35,917 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 73 [2022-12-14 09:57:35,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:57:35,922 INFO L225 Difference]: With dead ends: 983 [2022-12-14 09:57:35,922 INFO L226 Difference]: Without dead ends: 654 [2022-12-14 09:57:35,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:57:35,925 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 470 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:57:35,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 744 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:57:35,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2022-12-14 09:57:35,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 650. [2022-12-14 09:57:35,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 543 states have (on average 1.5046040515653776) internal successors, (817), 546 states have internal predecessors, (817), 82 states have call successors, (82), 24 states have call predecessors, (82), 24 states have return successors, (82), 80 states have call predecessors, (82), 82 states have call successors, (82) [2022-12-14 09:57:35,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 981 transitions. [2022-12-14 09:57:35,959 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 981 transitions. Word has length 73 [2022-12-14 09:57:35,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:57:35,959 INFO L495 AbstractCegarLoop]: Abstraction has 650 states and 981 transitions. [2022-12-14 09:57:35,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 09:57:35,959 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 981 transitions. [2022-12-14 09:57:35,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 09:57:35,963 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:57:35,963 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, 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] [2022-12-14 09:57:35,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 09:57:35,964 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:57:35,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:57:35,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1100507780, now seen corresponding path program 1 times [2022-12-14 09:57:35,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:57:35,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495482202] [2022-12-14 09:57:35,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:57:35,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:57:35,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:57:36,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:57:36,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:57:36,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495482202] [2022-12-14 09:57:36,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495482202] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:57:36,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:57:36,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 09:57:36,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401217003] [2022-12-14 09:57:36,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:57:36,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:57:36,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:57:36,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:57:36,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:57:36,097 INFO L87 Difference]: Start difference. First operand 650 states and 981 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 09:57:36,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:57:36,654 INFO L93 Difference]: Finished difference Result 2247 states and 3434 transitions. [2022-12-14 09:57:36,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:57:36,654 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 73 [2022-12-14 09:57:36,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:57:36,660 INFO L225 Difference]: With dead ends: 2247 [2022-12-14 09:57:36,660 INFO L226 Difference]: Without dead ends: 1533 [2022-12-14 09:57:36,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:57:36,663 INFO L413 NwaCegarLoop]: 538 mSDtfsCounter, 886 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 1198 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:57:36,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [899 Valid, 1198 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:57:36,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2022-12-14 09:57:36,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1515. [2022-12-14 09:57:36,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1515 states, 1294 states have (on average 1.4938176197836166) internal successors, (1933), 1282 states have internal predecessors, (1933), 164 states have call successors, (164), 52 states have call predecessors, (164), 56 states have return successors, (190), 181 states have call predecessors, (190), 164 states have call successors, (190) [2022-12-14 09:57:36,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1515 states to 1515 states and 2287 transitions. [2022-12-14 09:57:36,728 INFO L78 Accepts]: Start accepts. Automaton has 1515 states and 2287 transitions. Word has length 73 [2022-12-14 09:57:36,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:57:36,728 INFO L495 AbstractCegarLoop]: Abstraction has 1515 states and 2287 transitions. [2022-12-14 09:57:36,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 09:57:36,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1515 states and 2287 transitions. [2022-12-14 09:57:36,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 09:57:36,729 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:57:36,729 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, 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] [2022-12-14 09:57:36,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 09:57:36,730 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:57:36,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:57:36,730 INFO L85 PathProgramCache]: Analyzing trace with hash -997706533, now seen corresponding path program 1 times [2022-12-14 09:57:36,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:57:36,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093696005] [2022-12-14 09:57:36,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:57:36,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:57:36,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:57:36,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:57:36,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:57:36,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093696005] [2022-12-14 09:57:36,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093696005] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:57:36,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:57:36,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:57:36,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567197271] [2022-12-14 09:57:36,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:57:36,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:57:36,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:57:36,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:57:36,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:57:36,801 INFO L87 Difference]: Start difference. First operand 1515 states and 2287 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 09:57:37,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:57:37,171 INFO L93 Difference]: Finished difference Result 4506 states and 6916 transitions. [2022-12-14 09:57:37,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:57:37,172 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 73 [2022-12-14 09:57:37,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:57:37,183 INFO L225 Difference]: With dead ends: 4506 [2022-12-14 09:57:37,183 INFO L226 Difference]: Without dead ends: 2996 [2022-12-14 09:57:37,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:57:37,188 INFO L413 NwaCegarLoop]: 413 mSDtfsCounter, 481 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:57:37,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [481 Valid, 740 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:57:37,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2996 states. [2022-12-14 09:57:37,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2996 to 2982. [2022-12-14 09:57:37,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2553 states have (on average 1.4857030943987466) internal successors, (3793), 2530 states have internal predecessors, (3793), 316 states have call successors, (316), 104 states have call predecessors, (316), 112 states have return successors, (366), 348 states have call predecessors, (366), 316 states have call successors, (366) [2022-12-14 09:57:37,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 4475 transitions. [2022-12-14 09:57:37,323 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 4475 transitions. Word has length 73 [2022-12-14 09:57:37,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:57:37,324 INFO L495 AbstractCegarLoop]: Abstraction has 2982 states and 4475 transitions. [2022-12-14 09:57:37,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 09:57:37,324 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 4475 transitions. [2022-12-14 09:57:37,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 09:57:37,325 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:57:37,326 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, 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] [2022-12-14 09:57:37,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 09:57:37,326 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:57:37,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:57:37,326 INFO L85 PathProgramCache]: Analyzing trace with hash 435128186, now seen corresponding path program 1 times [2022-12-14 09:57:37,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:57:37,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383281378] [2022-12-14 09:57:37,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:57:37,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:57:37,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:57:37,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:57:37,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:57:37,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383281378] [2022-12-14 09:57:37,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383281378] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:57:37,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:57:37,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 09:57:37,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78473089] [2022-12-14 09:57:37,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:57:37,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:57:37,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:57:37,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:57:37,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:57:37,450 INFO L87 Difference]: Start difference. First operand 2982 states and 4475 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 09:57:38,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:57:38,121 INFO L93 Difference]: Finished difference Result 10391 states and 15822 transitions. [2022-12-14 09:57:38,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:57:38,122 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 73 [2022-12-14 09:57:38,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:57:38,148 INFO L225 Difference]: With dead ends: 10391 [2022-12-14 09:57:38,149 INFO L226 Difference]: Without dead ends: 7146 [2022-12-14 09:57:38,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:57:38,158 INFO L413 NwaCegarLoop]: 568 mSDtfsCounter, 851 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 1231 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:57:38,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [864 Valid, 1231 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:57:38,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7146 states. [2022-12-14 09:57:38,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7146 to 5656. [2022-12-14 09:57:38,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5656 states, 4835 states have (on average 1.4847983453981386) internal successors, (7179), 4832 states have internal predecessors, (7179), 596 states have call successors, (596), 200 states have call predecessors, (596), 224 states have return successors, (742), 624 states have call predecessors, (742), 596 states have call successors, (742) [2022-12-14 09:57:38,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5656 states to 5656 states and 8517 transitions. [2022-12-14 09:57:38,391 INFO L78 Accepts]: Start accepts. Automaton has 5656 states and 8517 transitions. Word has length 73 [2022-12-14 09:57:38,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:57:38,391 INFO L495 AbstractCegarLoop]: Abstraction has 5656 states and 8517 transitions. [2022-12-14 09:57:38,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 09:57:38,391 INFO L276 IsEmpty]: Start isEmpty. Operand 5656 states and 8517 transitions. [2022-12-14 09:57:38,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 09:57:38,393 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:57:38,393 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, 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] [2022-12-14 09:57:38,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 09:57:38,393 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:57:38,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:57:38,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1720386215, now seen corresponding path program 1 times [2022-12-14 09:57:38,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:57:38,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904154911] [2022-12-14 09:57:38,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:57:38,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:57:38,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:57:38,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:57:38,480 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:57:38,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904154911] [2022-12-14 09:57:38,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904154911] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:57:38,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:57:38,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 09:57:38,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415300924] [2022-12-14 09:57:38,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:57:38,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:57:38,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:57:38,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:57:38,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:57:38,482 INFO L87 Difference]: Start difference. First operand 5656 states and 8517 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 09:57:39,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:57:39,364 INFO L93 Difference]: Finished difference Result 19377 states and 29692 transitions. [2022-12-14 09:57:39,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:57:39,365 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 73 [2022-12-14 09:57:39,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:57:39,412 INFO L225 Difference]: With dead ends: 19377 [2022-12-14 09:57:39,412 INFO L226 Difference]: Without dead ends: 13198 [2022-12-14 09:57:39,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:57:39,431 INFO L413 NwaCegarLoop]: 578 mSDtfsCounter, 839 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 1251 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:57:39,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 1251 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:57:39,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13198 states. [2022-12-14 09:57:39,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13198 to 10900. [2022-12-14 09:57:39,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10900 states, 9311 states have (on average 1.4828697239823865) internal successors, (13807), 9356 states have internal predecessors, (13807), 1140 states have call successors, (1140), 392 states have call predecessors, (1140), 448 states have return successors, (1470), 1152 states have call predecessors, (1470), 1140 states have call successors, (1470) [2022-12-14 09:57:39,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10900 states to 10900 states and 16417 transitions. [2022-12-14 09:57:39,924 INFO L78 Accepts]: Start accepts. Automaton has 10900 states and 16417 transitions. Word has length 73 [2022-12-14 09:57:39,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:57:39,924 INFO L495 AbstractCegarLoop]: Abstraction has 10900 states and 16417 transitions. [2022-12-14 09:57:39,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 09:57:39,924 INFO L276 IsEmpty]: Start isEmpty. Operand 10900 states and 16417 transitions. [2022-12-14 09:57:39,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 09:57:39,926 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:57:39,926 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, 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] [2022-12-14 09:57:39,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 09:57:39,926 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:57:39,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:57:39,926 INFO L85 PathProgramCache]: Analyzing trace with hash 809764472, now seen corresponding path program 1 times [2022-12-14 09:57:39,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:57:39,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281707986] [2022-12-14 09:57:39,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:57:39,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:57:39,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:57:39,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:57:39,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:57:39,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281707986] [2022-12-14 09:57:39,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281707986] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:57:39,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:57:39,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:57:39,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160387136] [2022-12-14 09:57:39,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:57:39,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:57:39,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:57:39,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:57:39,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:57:39,996 INFO L87 Difference]: Start difference. First operand 10900 states and 16417 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 09:57:40,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:57:40,844 INFO L93 Difference]: Finished difference Result 32595 states and 50115 transitions. [2022-12-14 09:57:40,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:57:40,845 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 73 [2022-12-14 09:57:40,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:57:40,938 INFO L225 Difference]: With dead ends: 32595 [2022-12-14 09:57:40,938 INFO L226 Difference]: Without dead ends: 21700 [2022-12-14 09:57:40,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:57:40,966 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 501 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:57:40,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [501 Valid, 742 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:57:40,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21700 states. [2022-12-14 09:57:41,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21700 to 21632. [2022-12-14 09:57:41,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21632 states, 18459 states have (on average 1.4697979305487838) internal successors, (27131), 18548 states have internal predecessors, (27131), 2276 states have call successors, (2276), 784 states have call predecessors, (2276), 896 states have return successors, (2936), 2300 states have call predecessors, (2936), 2276 states have call successors, (2936) [2022-12-14 09:57:41,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21632 states to 21632 states and 32343 transitions. [2022-12-14 09:57:41,932 INFO L78 Accepts]: Start accepts. Automaton has 21632 states and 32343 transitions. Word has length 73 [2022-12-14 09:57:41,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:57:41,933 INFO L495 AbstractCegarLoop]: Abstraction has 21632 states and 32343 transitions. [2022-12-14 09:57:41,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 09:57:41,933 INFO L276 IsEmpty]: Start isEmpty. Operand 21632 states and 32343 transitions. [2022-12-14 09:57:41,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 09:57:41,943 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:57:41,943 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:57:41,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 09:57:41,943 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:57:41,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:57:41,944 INFO L85 PathProgramCache]: Analyzing trace with hash -468916115, now seen corresponding path program 1 times [2022-12-14 09:57:41,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:57:41,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199260216] [2022-12-14 09:57:41,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:57:41,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:57:41,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:57:42,156 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 09:57:42,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:57:42,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199260216] [2022-12-14 09:57:42,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199260216] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:57:42,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:57:42,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 09:57:42,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163556039] [2022-12-14 09:57:42,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:57:42,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:57:42,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:57:42,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:57:42,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:57:42,158 INFO L87 Difference]: Start difference. First operand 21632 states and 32343 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 09:57:44,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:57:44,200 INFO L93 Difference]: Finished difference Result 64840 states and 96507 transitions. [2022-12-14 09:57:44,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 09:57:44,201 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 94 [2022-12-14 09:57:44,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:57:44,338 INFO L225 Difference]: With dead ends: 64840 [2022-12-14 09:57:44,338 INFO L226 Difference]: Without dead ends: 43214 [2022-12-14 09:57:44,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 09:57:44,381 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 948 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 955 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:57:44,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [955 Valid, 832 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:57:44,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43214 states. [2022-12-14 09:57:45,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43214 to 36000. [2022-12-14 09:57:45,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36000 states, 31059 states have (on average 1.456099681251811) internal successors, (45225), 31190 states have internal predecessors, (45225), 3412 states have call successors, (3412), 1304 states have call predecessors, (3412), 1528 states have return successors, (4402), 3506 states have call predecessors, (4402), 3412 states have call successors, (4402) [2022-12-14 09:57:45,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36000 states to 36000 states and 53039 transitions. [2022-12-14 09:57:45,859 INFO L78 Accepts]: Start accepts. Automaton has 36000 states and 53039 transitions. Word has length 94 [2022-12-14 09:57:45,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:57:45,860 INFO L495 AbstractCegarLoop]: Abstraction has 36000 states and 53039 transitions. [2022-12-14 09:57:45,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 09:57:45,860 INFO L276 IsEmpty]: Start isEmpty. Operand 36000 states and 53039 transitions. [2022-12-14 09:57:45,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-12-14 09:57:45,870 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:57:45,870 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:57:45,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 09:57:45,870 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:57:45,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:57:45,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1858543949, now seen corresponding path program 1 times [2022-12-14 09:57:45,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:57:45,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145734412] [2022-12-14 09:57:45,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:57:45,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:57:45,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:57:46,043 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 09:57:46,043 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:57:46,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145734412] [2022-12-14 09:57:46,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145734412] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:57:46,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:57:46,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 09:57:46,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070221724] [2022-12-14 09:57:46,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:57:46,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:57:46,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:57:46,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:57:46,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:57:46,045 INFO L87 Difference]: Start difference. First operand 36000 states and 53039 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 09:57:50,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:57:50,163 INFO L93 Difference]: Finished difference Result 133576 states and 196680 transitions. [2022-12-14 09:57:50,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 09:57:50,164 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 96 [2022-12-14 09:57:50,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:57:50,479 INFO L225 Difference]: With dead ends: 133576 [2022-12-14 09:57:50,479 INFO L226 Difference]: Without dead ends: 97582 [2022-12-14 09:57:50,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 09:57:50,562 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 1053 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1072 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:57:50,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1072 Valid, 628 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:57:50,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97582 states. [2022-12-14 09:57:54,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97582 to 70780. [2022-12-14 09:57:54,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70780 states, 61095 states have (on average 1.450576970292168) internal successors, (88623), 61368 states have internal predecessors, (88623), 6628 states have call successors, (6628), 2608 states have call predecessors, (6628), 3056 states have return successors, (8524), 6804 states have call predecessors, (8524), 6628 states have call successors, (8524) [2022-12-14 09:57:54,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70780 states to 70780 states and 103775 transitions. [2022-12-14 09:57:54,723 INFO L78 Accepts]: Start accepts. Automaton has 70780 states and 103775 transitions. Word has length 96 [2022-12-14 09:57:54,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:57:54,723 INFO L495 AbstractCegarLoop]: Abstraction has 70780 states and 103775 transitions. [2022-12-14 09:57:54,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 09:57:54,724 INFO L276 IsEmpty]: Start isEmpty. Operand 70780 states and 103775 transitions. [2022-12-14 09:57:54,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-12-14 09:57:54,741 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:57:54,742 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:57:54,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 09:57:54,742 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:57:54,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:57:54,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1380022477, now seen corresponding path program 1 times [2022-12-14 09:57:54,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:57:54,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654070521] [2022-12-14 09:57:54,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:57:54,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:57:54,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:57:54,904 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 09:57:54,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:57:54,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654070521] [2022-12-14 09:57:54,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654070521] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:57:54,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:57:54,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 09:57:54,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023888525] [2022-12-14 09:57:54,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:57:54,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:57:54,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:57:54,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:57:54,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:57:54,906 INFO L87 Difference]: Start difference. First operand 70780 states and 103775 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 09:58:00,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:58:00,777 INFO L93 Difference]: Finished difference Result 211896 states and 313033 transitions. [2022-12-14 09:58:00,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 09:58:00,777 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 98 [2022-12-14 09:58:00,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:58:01,183 INFO L225 Difference]: With dead ends: 211896 [2022-12-14 09:58:01,183 INFO L226 Difference]: Without dead ends: 141122 [2022-12-14 09:58:01,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 09:58:01,322 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 886 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 892 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:58:01,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [892 Valid, 712 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:58:01,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141122 states. [2022-12-14 09:58:06,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141122 to 109792. [2022-12-14 09:58:06,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109792 states, 95067 states have (on average 1.4486099277351763) internal successors, (137715), 95380 states have internal predecessors, (137715), 9892 states have call successors, (9892), 3936 states have call predecessors, (9892), 4832 states have return successors, (13516), 10476 states have call predecessors, (13516), 9892 states have call successors, (13516) [2022-12-14 09:58:07,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109792 states to 109792 states and 161123 transitions. [2022-12-14 09:58:07,224 INFO L78 Accepts]: Start accepts. Automaton has 109792 states and 161123 transitions. Word has length 98 [2022-12-14 09:58:07,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:58:07,224 INFO L495 AbstractCegarLoop]: Abstraction has 109792 states and 161123 transitions. [2022-12-14 09:58:07,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 09:58:07,225 INFO L276 IsEmpty]: Start isEmpty. Operand 109792 states and 161123 transitions. [2022-12-14 09:58:07,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-12-14 09:58:07,249 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:58:07,249 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:58:07,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 09:58:07,249 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:58:07,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:58:07,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1728781845, now seen corresponding path program 1 times [2022-12-14 09:58:07,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:58:07,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107761739] [2022-12-14 09:58:07,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:58:07,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:58:07,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:58:07,403 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 09:58:07,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:58:07,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107761739] [2022-12-14 09:58:07,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107761739] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:58:07,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:58:07,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 09:58:07,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343460327] [2022-12-14 09:58:07,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:58:07,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:58:07,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:58:07,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:58:07,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:58:07,405 INFO L87 Difference]: Start difference. First operand 109792 states and 161123 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 09:58:16,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:58:16,858 INFO L93 Difference]: Finished difference Result 312708 states and 460349 transitions. [2022-12-14 09:58:16,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 09:58:16,859 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 100 [2022-12-14 09:58:16,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:58:17,423 INFO L225 Difference]: With dead ends: 312708 [2022-12-14 09:58:17,423 INFO L226 Difference]: Without dead ends: 202922 [2022-12-14 09:58:17,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 09:58:17,608 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 926 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 932 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:58:17,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [932 Valid, 686 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:58:17,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202922 states. [2022-12-14 09:58:25,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202922 to 162280. [2022-12-14 09:58:25,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162280 states, 140259 states have (on average 1.4435223408123543) internal successors, (202467), 140484 states have internal predecessors, (202467), 14788 states have call successors, (14788), 5952 states have call predecessors, (14788), 7232 states have return successors, (19876), 15844 states have call predecessors, (19876), 14788 states have call successors, (19876) [2022-12-14 09:58:26,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162280 states to 162280 states and 237131 transitions. [2022-12-14 09:58:26,260 INFO L78 Accepts]: Start accepts. Automaton has 162280 states and 237131 transitions. Word has length 100 [2022-12-14 09:58:26,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:58:26,261 INFO L495 AbstractCegarLoop]: Abstraction has 162280 states and 237131 transitions. [2022-12-14 09:58:26,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 09:58:26,261 INFO L276 IsEmpty]: Start isEmpty. Operand 162280 states and 237131 transitions. [2022-12-14 09:58:26,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-14 09:58:26,289 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:58:26,289 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:58:26,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 09:58:26,289 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:58:26,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:58:26,289 INFO L85 PathProgramCache]: Analyzing trace with hash 350308621, now seen corresponding path program 1 times [2022-12-14 09:58:26,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:58:26,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570571725] [2022-12-14 09:58:26,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:58:26,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:58:26,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:58:26,456 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 09:58:26,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:58:26,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570571725] [2022-12-14 09:58:26,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570571725] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:58:26,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:58:26,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 09:58:26,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621930888] [2022-12-14 09:58:26,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:58:26,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:58:26,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:58:26,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:58:26,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:58:26,458 INFO L87 Difference]: Start difference. First operand 162280 states and 237131 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 09:58:41,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:58:41,787 INFO L93 Difference]: Finished difference Result 446940 states and 657045 transitions. [2022-12-14 09:58:41,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 09:58:41,788 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 102 [2022-12-14 09:58:41,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:58:42,726 INFO L225 Difference]: With dead ends: 446940 [2022-12-14 09:58:42,726 INFO L226 Difference]: Without dead ends: 284666 [2022-12-14 09:58:42,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 09:58:42,973 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 808 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:58:42,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [814 Valid, 812 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:58:43,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284666 states. [2022-12-14 09:58:56,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284666 to 241656. [2022-12-14 09:58:56,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241656 states, 208843 states have (on average 1.4410969005425127) internal successors, (300963), 209204 states have internal predecessors, (300963), 21964 states have call successors, (21964), 8928 states have call predecessors, (21964), 10848 states have return successors, (29476), 23524 states have call predecessors, (29476), 21964 states have call successors, (29476) [2022-12-14 09:58:57,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241656 states to 241656 states and 352403 transitions. [2022-12-14 09:58:57,363 INFO L78 Accepts]: Start accepts. Automaton has 241656 states and 352403 transitions. Word has length 102 [2022-12-14 09:58:57,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:58:57,363 INFO L495 AbstractCegarLoop]: Abstraction has 241656 states and 352403 transitions. [2022-12-14 09:58:57,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 09:58:57,364 INFO L276 IsEmpty]: Start isEmpty. Operand 241656 states and 352403 transitions. [2022-12-14 09:58:57,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-12-14 09:58:57,395 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:58:57,395 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:58:57,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 09:58:57,395 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:58:57,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:58:57,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1628889387, now seen corresponding path program 1 times [2022-12-14 09:58:57,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:58:57,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931255627] [2022-12-14 09:58:57,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:58:57,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:58:57,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:58:57,551 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 09:58:57,551 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:58:57,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931255627] [2022-12-14 09:58:57,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931255627] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:58:57,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:58:57,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 09:58:57,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478720401] [2022-12-14 09:58:57,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:58:57,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:58:57,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:58:57,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:58:57,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:58:57,553 INFO L87 Difference]: Start difference. First operand 241656 states and 352403 transitions. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 09:59:31,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:59:31,643 INFO L93 Difference]: Finished difference Result 828588 states and 1215494 transitions. [2022-12-14 09:59:31,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 09:59:31,644 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 104 [2022-12-14 09:59:31,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:59:33,585 INFO L225 Difference]: With dead ends: 828588 [2022-12-14 09:59:33,586 INFO L226 Difference]: Without dead ends: 586938 [2022-12-14 09:59:34,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 09:59:34,078 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 883 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 902 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:59:34,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [902 Valid, 593 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:59:34,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586938 states. [2022-12-14 10:00:04,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586938 to 474808. [2022-12-14 10:00:04,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474808 states, 410483 states have (on average 1.4351556580905909) internal successors, (589107), 411348 states have internal predecessors, (589107), 42628 states have call successors, (42628), 17856 states have call predecessors, (42628), 21696 states have return successors, (56932), 45604 states have call predecessors, (56932), 42628 states have call successors, (56932) [2022-12-14 10:00:06,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474808 states to 474808 states and 688667 transitions. [2022-12-14 10:00:06,281 INFO L78 Accepts]: Start accepts. Automaton has 474808 states and 688667 transitions. Word has length 104 [2022-12-14 10:00:06,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:00:06,282 INFO L495 AbstractCegarLoop]: Abstraction has 474808 states and 688667 transitions. [2022-12-14 10:00:06,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 10:00:06,282 INFO L276 IsEmpty]: Start isEmpty. Operand 474808 states and 688667 transitions. [2022-12-14 10:00:06,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-12-14 10:00:06,359 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:00:06,359 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:00:06,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 10:00:06,359 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:00:06,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:00:06,360 INFO L85 PathProgramCache]: Analyzing trace with hash -59837875, now seen corresponding path program 1 times [2022-12-14 10:00:06,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:00:06,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017552101] [2022-12-14 10:00:06,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:00:06,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:00:06,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:00:06,504 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 10:00:06,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:00:06,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017552101] [2022-12-14 10:00:06,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017552101] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:00:06,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:00:06,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 10:00:06,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95430578] [2022-12-14 10:00:06,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:00:06,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:00:06,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:00:06,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:00:06,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:00:06,506 INFO L87 Difference]: Start difference. First operand 474808 states and 688667 transitions. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 10:00:59,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:00:59,501 INFO L93 Difference]: Finished difference Result 1291292 states and 1881253 transitions. [2022-12-14 10:00:59,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 10:00:59,502 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 106 [2022-12-14 10:00:59,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:01:02,527 INFO L225 Difference]: With dead ends: 1291292 [2022-12-14 10:01:02,527 INFO L226 Difference]: Without dead ends: 816490 [2022-12-14 10:01:03,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 10:01:03,790 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 820 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:01:03,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [826 Valid, 643 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:01:04,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816490 states. [2022-12-14 10:01:52,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816490 to 710312. [2022-12-14 10:01:52,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710312 states, 613995 states have (on average 1.429462780641536) internal successors, (877683), 614140 states have internal predecessors, (877683), 63868 states have call successors, (63868), 27072 states have call predecessors, (63868), 32448 states have return successors, (83548), 69100 states have call predecessors, (83548), 63868 states have call successors, (83548) [2022-12-14 10:01:55,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710312 states to 710312 states and 1025099 transitions. [2022-12-14 10:01:55,455 INFO L78 Accepts]: Start accepts. Automaton has 710312 states and 1025099 transitions. Word has length 106 [2022-12-14 10:01:55,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:01:55,456 INFO L495 AbstractCegarLoop]: Abstraction has 710312 states and 1025099 transitions. [2022-12-14 10:01:55,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 10:01:55,456 INFO L276 IsEmpty]: Start isEmpty. Operand 710312 states and 1025099 transitions. [2022-12-14 10:01:55,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 10:01:55,545 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:01:55,545 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:01:55,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 10:01:55,545 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:01:55,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:01:55,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1292462451, now seen corresponding path program 1 times [2022-12-14 10:01:55,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:01:55,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365527541] [2022-12-14 10:01:55,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:01:55,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:01:55,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:01:55,696 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 10:01:55,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:01:55,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365527541] [2022-12-14 10:01:55,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365527541] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:01:55,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:01:55,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 10:01:55,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743956014] [2022-12-14 10:01:55,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:01:55,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:01:55,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:01:55,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:01:55,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:01:55,698 INFO L87 Difference]: Start difference. First operand 710312 states and 1025099 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 10:03:52,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:03:52,312 INFO L93 Difference]: Finished difference Result 2324748 states and 3374630 transitions. [2022-12-14 10:03:52,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 10:03:52,313 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 108 [2022-12-14 10:03:52,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:03:58,634 INFO L225 Difference]: With dead ends: 2324748 [2022-12-14 10:03:58,634 INFO L226 Difference]: Without dead ends: 1614442 [2022-12-14 10:04:00,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 10:04:00,725 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 819 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 838 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:04:00,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [838 Valid, 577 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:04:02,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614442 states.