./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_875c160f-9e3f-4f65-aa4d-3c9f0991ec03/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_875c160f-9e3f-4f65-aa4d-3c9f0991ec03/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_875c160f-9e3f-4f65-aa4d-3c9f0991ec03/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_875c160f-9e3f-4f65-aa4d-3c9f0991ec03/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_875c160f-9e3f-4f65-aa4d-3c9f0991ec03/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_875c160f-9e3f-4f65-aa4d-3c9f0991ec03/bin/utaipan-7li7fVZpFI --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 5202e6cfdb0072b2d97423b078e60556fe6d43d8002548ceef037df7f02499eb --- 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-5e519f3 [2022-11-03 02:25:17,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:25:17,956 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:25:18,001 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:25:18,001 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:25:18,005 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:25:18,007 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:25:18,012 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:25:18,014 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:25:18,019 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:25:18,020 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:25:18,023 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:25:18,023 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:25:18,026 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:25:18,028 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:25:18,030 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:25:18,031 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:25:18,032 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:25:18,034 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:25:18,041 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:25:18,042 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:25:18,044 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:25:18,047 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:25:18,048 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:25:18,056 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:25:18,057 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:25:18,057 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:25:18,059 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:25:18,060 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:25:18,061 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:25:18,061 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:25:18,063 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:25:18,066 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:25:18,067 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:25:18,068 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:25:18,068 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:25:18,069 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:25:18,069 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:25:18,070 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:25:18,071 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:25:18,071 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:25:18,072 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_875c160f-9e3f-4f65-aa4d-3c9f0991ec03/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:25:18,128 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:25:18,128 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:25:18,129 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:25:18,129 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:25:18,130 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:25:18,131 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:25:18,131 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:25:18,131 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:25:18,131 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:25:18,131 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:25:18,133 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:25:18,133 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:25:18,133 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:25:18,133 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:25:18,133 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:25:18,134 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:25:18,134 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:25:18,134 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:25:18,135 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:25:18,135 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:25:18,135 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:25:18,136 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:25:18,136 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:25:18,137 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:25:18,138 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:25:18,138 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:25:18,138 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:25:18,138 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:25:18,139 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:25:18,139 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:25:18,139 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:25:18,139 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:25:18,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:25:18,140 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:25:18,140 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:25:18,140 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:25:18,141 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:25:18,141 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:25:18,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:25:18,141 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:25:18,141 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:25:18,142 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_875c160f-9e3f-4f65-aa4d-3c9f0991ec03/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_875c160f-9e3f-4f65-aa4d-3c9f0991ec03/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5202e6cfdb0072b2d97423b078e60556fe6d43d8002548ceef037df7f02499eb [2022-11-03 02:25:18,399 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:25:18,425 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:25:18,428 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:25:18,429 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:25:18,430 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:25:18,432 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_875c160f-9e3f-4f65-aa4d-3c9f0991ec03/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-1.c [2022-11-03 02:25:18,516 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_875c160f-9e3f-4f65-aa4d-3c9f0991ec03/bin/utaipan-7li7fVZpFI/data/9338d4ec5/3d12a77596804f6f951f0fbed0ee0a61/FLAG58b26c644 [2022-11-03 02:25:18,988 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:25:18,988 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_875c160f-9e3f-4f65-aa4d-3c9f0991ec03/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-1.c [2022-11-03 02:25:19,010 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_875c160f-9e3f-4f65-aa4d-3c9f0991ec03/bin/utaipan-7li7fVZpFI/data/9338d4ec5/3d12a77596804f6f951f0fbed0ee0a61/FLAG58b26c644 [2022-11-03 02:25:19,342 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_875c160f-9e3f-4f65-aa4d-3c9f0991ec03/bin/utaipan-7li7fVZpFI/data/9338d4ec5/3d12a77596804f6f951f0fbed0ee0a61 [2022-11-03 02:25:19,344 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:25:19,345 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:25:19,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:25:19,347 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:25:19,361 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:25:19,362 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:25:19" (1/1) ... [2022-11-03 02:25:19,363 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a3fd588 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:19, skipping insertion in model container [2022-11-03 02:25:19,364 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:25:19" (1/1) ... [2022-11-03 02:25:19,371 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:25:19,443 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:25:19,604 WARN L230 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_875c160f-9e3f-4f65-aa4d-3c9f0991ec03/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-1.c[911,924] [2022-11-03 02:25:19,662 WARN L230 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_875c160f-9e3f-4f65-aa4d-3c9f0991ec03/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-1.c[8416,8429] [2022-11-03 02:25:19,751 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:25:19,762 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:25:19,775 WARN L230 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_875c160f-9e3f-4f65-aa4d-3c9f0991ec03/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-1.c[911,924] [2022-11-03 02:25:19,799 WARN L230 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_875c160f-9e3f-4f65-aa4d-3c9f0991ec03/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-1.c[8416,8429] [2022-11-03 02:25:19,891 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:25:19,917 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:25:19,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:19 WrapperNode [2022-11-03 02:25:19,917 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:25:19,918 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:25:19,919 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:25:19,919 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:25:19,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:19" (1/1) ... [2022-11-03 02:25:19,945 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:19" (1/1) ... [2022-11-03 02:25:20,040 INFO L138 Inliner]: procedures = 71, calls = 85, calls flagged for inlining = 40, calls inlined = 40, statements flattened = 846 [2022-11-03 02:25:20,040 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:25:20,041 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:25:20,041 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:25:20,041 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:25:20,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:19" (1/1) ... [2022-11-03 02:25:20,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:19" (1/1) ... [2022-11-03 02:25:20,055 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:19" (1/1) ... [2022-11-03 02:25:20,055 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:19" (1/1) ... [2022-11-03 02:25:20,067 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:19" (1/1) ... [2022-11-03 02:25:20,080 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:19" (1/1) ... [2022-11-03 02:25:20,084 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:19" (1/1) ... [2022-11-03 02:25:20,087 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:19" (1/1) ... [2022-11-03 02:25:20,093 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:25:20,094 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:25:20,094 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:25:20,094 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:25:20,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:19" (1/1) ... [2022-11-03 02:25:20,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:25:20,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_875c160f-9e3f-4f65-aa4d-3c9f0991ec03/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:25:20,150 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_875c160f-9e3f-4f65-aa4d-3c9f0991ec03/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:25:20,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_875c160f-9e3f-4f65-aa4d-3c9f0991ec03/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:25:20,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:25:20,190 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-03 02:25:20,190 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-03 02:25:20,190 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-03 02:25:20,190 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-03 02:25:20,190 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-03 02:25:20,190 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-03 02:25:20,191 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-03 02:25:20,191 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-03 02:25:20,191 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-03 02:25:20,191 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-03 02:25:20,191 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-03 02:25:20,191 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-03 02:25:20,191 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-03 02:25:20,191 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-03 02:25:20,192 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-03 02:25:20,192 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-03 02:25:20,192 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-03 02:25:20,192 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-03 02:25:20,192 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-03 02:25:20,192 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-03 02:25:20,192 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-03 02:25:20,192 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-03 02:25:20,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:25:20,193 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-03 02:25:20,193 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-03 02:25:20,193 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-03 02:25:20,193 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-03 02:25:20,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:25:20,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:25:20,193 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-03 02:25:20,194 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-03 02:25:20,313 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:25:20,315 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:25:21,185 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2022-11-03 02:25:21,205 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2022-11-03 02:25:21,289 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:25:21,742 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:25:21,742 INFO L300 CfgBuilder]: Removed 15 assume(true) statements. [2022-11-03 02:25:21,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:25:21 BoogieIcfgContainer [2022-11-03 02:25:21,746 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:25:21,749 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:25:21,750 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:25:21,753 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:25:21,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:25:19" (1/3) ... [2022-11-03 02:25:21,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c7b304 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:25:21, skipping insertion in model container [2022-11-03 02:25:21,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:19" (2/3) ... [2022-11-03 02:25:21,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c7b304 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:25:21, skipping insertion in model container [2022-11-03 02:25:21,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:25:21" (3/3) ... [2022-11-03 02:25:21,758 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.08.cil-1.c [2022-11-03 02:25:21,777 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:25:21,778 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-03 02:25:21,865 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:25:21,880 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;@9c0c4ed, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:25:21,880 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-03 02:25:21,892 INFO L276 IsEmpty]: Start isEmpty. Operand has 223 states, 168 states have (on average 1.5297619047619047) internal successors, (257), 174 states have internal predecessors, (257), 38 states have call successors, (38), 14 states have call predecessors, (38), 14 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2022-11-03 02:25:21,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:25:21,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:21,903 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] [2022-11-03 02:25:21,904 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:21,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:21,909 INFO L85 PathProgramCache]: Analyzing trace with hash -372055152, now seen corresponding path program 1 times [2022-11-03 02:25:21,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:21,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366239471] [2022-11-03 02:25:21,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:21,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:22,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:22,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:25:22,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:22,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366239471] [2022-11-03 02:25:22,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366239471] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:22,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:25:22,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:25:22,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050970274] [2022-11-03 02:25:22,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:22,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:25:22,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:22,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:25:22,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:25:22,357 INFO L87 Difference]: Start difference. First operand has 223 states, 168 states have (on average 1.5297619047619047) internal successors, (257), 174 states have internal predecessors, (257), 38 states have call successors, (38), 14 states have call predecessors, (38), 14 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 02:25:22,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:22,948 INFO L93 Difference]: Finished difference Result 569 states and 844 transitions. [2022-11-03 02:25:22,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:25:22,952 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 44 [2022-11-03 02:25:22,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:22,973 INFO L225 Difference]: With dead ends: 569 [2022-11-03 02:25:22,974 INFO L226 Difference]: Without dead ends: 347 [2022-11-03 02:25:22,985 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 [2022-11-03 02:25:22,989 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 385 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:22,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 594 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:25:23,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-11-03 02:25:23,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 336. [2022-11-03 02:25:23,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 249 states have (on average 1.4337349397590362) internal successors, (357), 253 states have internal predecessors, (357), 58 states have call successors, (58), 28 states have call predecessors, (58), 27 states have return successors, (59), 56 states have call predecessors, (59), 56 states have call successors, (59) [2022-11-03 02:25:23,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 474 transitions. [2022-11-03 02:25:23,112 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 474 transitions. Word has length 44 [2022-11-03 02:25:23,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:23,113 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 474 transitions. [2022-11-03 02:25:23,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 02:25:23,114 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 474 transitions. [2022-11-03 02:25:23,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 02:25:23,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:23,117 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:25:23,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:25:23,117 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:23,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:23,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1137879246, now seen corresponding path program 1 times [2022-11-03 02:25:23,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:23,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248188130] [2022-11-03 02:25:23,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:23,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:23,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:23,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:25:23,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:23,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248188130] [2022-11-03 02:25:23,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248188130] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:23,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:25:23,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:25:23,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023466476] [2022-11-03 02:25:23,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:23,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:25:23,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:23,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:25:23,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:25:23,275 INFO L87 Difference]: Start difference. First operand 336 states and 474 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 02:25:24,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:24,256 INFO L93 Difference]: Finished difference Result 873 states and 1197 transitions. [2022-11-03 02:25:24,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:25:24,257 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-11-03 02:25:24,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:24,259 INFO L225 Difference]: With dead ends: 873 [2022-11-03 02:25:24,260 INFO L226 Difference]: Without dead ends: 407 [2022-11-03 02:25:24,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:25:24,262 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 846 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 1037 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:24,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [855 Valid, 1037 Invalid, 1037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:25:24,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-11-03 02:25:24,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 322. [2022-11-03 02:25:24,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 235 states have (on average 1.3787234042553191) internal successors, (324), 239 states have internal predecessors, (324), 58 states have call successors, (58), 28 states have call predecessors, (58), 27 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2022-11-03 02:25:24,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 438 transitions. [2022-11-03 02:25:24,295 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 438 transitions. Word has length 45 [2022-11-03 02:25:24,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:24,295 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 438 transitions. [2022-11-03 02:25:24,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 02:25:24,295 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 438 transitions. [2022-11-03 02:25:24,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 02:25:24,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:24,297 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] [2022-11-03 02:25:24,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:25:24,298 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:24,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:24,298 INFO L85 PathProgramCache]: Analyzing trace with hash -893684051, now seen corresponding path program 1 times [2022-11-03 02:25:24,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:24,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554159817] [2022-11-03 02:25:24,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:24,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:24,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:24,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:25:24,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:24,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554159817] [2022-11-03 02:25:24,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554159817] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:24,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:25:24,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:25:24,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37881763] [2022-11-03 02:25:24,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:24,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:25:24,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:24,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:25:24,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:25:24,429 INFO L87 Difference]: Start difference. First operand 322 states and 438 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 02:25:25,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:25,207 INFO L93 Difference]: Finished difference Result 788 states and 1046 transitions. [2022-11-03 02:25:25,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:25:25,208 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 46 [2022-11-03 02:25:25,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:25,212 INFO L225 Difference]: With dead ends: 788 [2022-11-03 02:25:25,212 INFO L226 Difference]: Without dead ends: 611 [2022-11-03 02:25:25,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:25:25,214 INFO L413 NwaCegarLoop]: 391 mSDtfsCounter, 760 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 769 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:25,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [769 Valid, 981 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:25:25,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-11-03 02:25:25,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 586. [2022-11-03 02:25:25,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 416 states have (on average 1.3052884615384615) internal successors, (543), 420 states have internal predecessors, (543), 107 states have call successors, (107), 62 states have call predecessors, (107), 61 states have return successors, (122), 105 states have call predecessors, (122), 105 states have call successors, (122) [2022-11-03 02:25:25,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 772 transitions. [2022-11-03 02:25:25,292 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 772 transitions. Word has length 46 [2022-11-03 02:25:25,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:25,292 INFO L495 AbstractCegarLoop]: Abstraction has 586 states and 772 transitions. [2022-11-03 02:25:25,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 02:25:25,292 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 772 transitions. [2022-11-03 02:25:25,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-03 02:25:25,294 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:25,294 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] [2022-11-03 02:25:25,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:25:25,294 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:25,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:25,295 INFO L85 PathProgramCache]: Analyzing trace with hash -544682438, now seen corresponding path program 1 times [2022-11-03 02:25:25,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:25,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100605059] [2022-11-03 02:25:25,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:25,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:25,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:25,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:25:25,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:25,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100605059] [2022-11-03 02:25:25,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100605059] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:25,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:25:25,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:25:25,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665319608] [2022-11-03 02:25:25,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:25,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:25:25,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:25,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:25:25,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:25:25,354 INFO L87 Difference]: Start difference. First operand 586 states and 772 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:25:25,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:25,464 INFO L93 Difference]: Finished difference Result 587 states and 773 transitions. [2022-11-03 02:25:25,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:25:25,465 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 50 [2022-11-03 02:25:25,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:25,467 INFO L225 Difference]: With dead ends: 587 [2022-11-03 02:25:25,468 INFO L226 Difference]: Without dead ends: 143 [2022-11-03 02:25:25,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:25:25,477 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 282 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:25,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 248 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:25:25,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-03 02:25:25,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-11-03 02:25:25,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 114 states have (on average 1.5) internal successors, (171), 115 states have internal predecessors, (171), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-03 02:25:25,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 215 transitions. [2022-11-03 02:25:25,501 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 215 transitions. Word has length 50 [2022-11-03 02:25:25,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:25,503 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 215 transitions. [2022-11-03 02:25:25,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:25:25,504 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 215 transitions. [2022-11-03 02:25:25,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-03 02:25:25,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:25,509 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] [2022-11-03 02:25:25,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:25:25,512 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:25,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:25,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1455537155, now seen corresponding path program 1 times [2022-11-03 02:25:25,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:25,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538559265] [2022-11-03 02:25:25,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:25,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:25,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:25,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:25:25,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:25,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538559265] [2022-11-03 02:25:25,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538559265] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:25,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:25:25,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:25:25,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964422729] [2022-11-03 02:25:25,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:25,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:25:25,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:25,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:25:25,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:25:25,675 INFO L87 Difference]: Start difference. First operand 143 states and 215 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2022-11-03 02:25:26,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:26,464 INFO L93 Difference]: Finished difference Result 801 states and 1286 transitions. [2022-11-03 02:25:26,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:25:26,465 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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 55 [2022-11-03 02:25:26,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:26,474 INFO L225 Difference]: With dead ends: 801 [2022-11-03 02:25:26,475 INFO L226 Difference]: Without dead ends: 664 [2022-11-03 02:25:26,476 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 [2022-11-03 02:25:26,481 INFO L413 NwaCegarLoop]: 396 mSDtfsCounter, 953 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 966 SdHoareTripleChecker+Valid, 961 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:26,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [966 Valid, 961 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:25:26,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-11-03 02:25:26,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 653. [2022-11-03 02:25:26,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 531 states have (on average 1.5009416195856873) internal successors, (797), 535 states have internal predecessors, (797), 91 states have call successors, (91), 30 states have call predecessors, (91), 30 states have return successors, (137), 88 states have call predecessors, (137), 91 states have call successors, (137) [2022-11-03 02:25:26,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1025 transitions. [2022-11-03 02:25:26,590 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1025 transitions. Word has length 55 [2022-11-03 02:25:26,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:26,590 INFO L495 AbstractCegarLoop]: Abstraction has 653 states and 1025 transitions. [2022-11-03 02:25:26,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2022-11-03 02:25:26,591 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1025 transitions. [2022-11-03 02:25:26,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 02:25:26,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:26,596 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, 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] [2022-11-03 02:25:26,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:25:26,597 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:26,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:26,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1311467187, now seen corresponding path program 1 times [2022-11-03 02:25:26,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:26,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835410096] [2022-11-03 02:25:26,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:26,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:26,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:26,874 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:25:26,874 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:26,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835410096] [2022-11-03 02:25:26,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835410096] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:25:26,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312844226] [2022-11-03 02:25:26,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:26,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:26,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_875c160f-9e3f-4f65-aa4d-3c9f0991ec03/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:25:26,877 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_875c160f-9e3f-4f65-aa4d-3c9f0991ec03/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:25:26,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_875c160f-9e3f-4f65-aa4d-3c9f0991ec03/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:25:27,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:27,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 780 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:25:27,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:25:27,220 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 02:25:27,220 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:25:27,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312844226] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:27,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:25:27,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:25:27,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344419502] [2022-11-03 02:25:27,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:27,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:25:27,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:27,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:25:27,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:25:27,223 INFO L87 Difference]: Start difference. First operand 653 states and 1025 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:25:27,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:27,502 INFO L93 Difference]: Finished difference Result 1931 states and 3121 transitions. [2022-11-03 02:25:27,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:25:27,503 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 108 [2022-11-03 02:25:27,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:27,511 INFO L225 Difference]: With dead ends: 1931 [2022-11-03 02:25:27,512 INFO L226 Difference]: Without dead ends: 1284 [2022-11-03 02:25:27,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:25:27,517 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 187 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:27,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 361 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:25:27,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2022-11-03 02:25:27,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 1277. [2022-11-03 02:25:27,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1277 states, 1043 states have (on average 1.49568552253116) internal successors, (1560), 1050 states have internal predecessors, (1560), 173 states have call successors, (173), 60 states have call predecessors, (173), 60 states have return successors, (261), 167 states have call predecessors, (261), 173 states have call successors, (261) [2022-11-03 02:25:27,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1277 states to 1277 states and 1994 transitions. [2022-11-03 02:25:27,680 INFO L78 Accepts]: Start accepts. Automaton has 1277 states and 1994 transitions. Word has length 108 [2022-11-03 02:25:27,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:27,681 INFO L495 AbstractCegarLoop]: Abstraction has 1277 states and 1994 transitions. [2022-11-03 02:25:27,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:25:27,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1277 states and 1994 transitions. [2022-11-03 02:25:27,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 02:25:27,691 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:27,691 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, 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] [2022-11-03 02:25:27,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_875c160f-9e3f-4f65-aa4d-3c9f0991ec03/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:25:27,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_875c160f-9e3f-4f65-aa4d-3c9f0991ec03/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:27,915 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:27,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:27,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1789257453, now seen corresponding path program 1 times [2022-11-03 02:25:27,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:27,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839232709] [2022-11-03 02:25:27,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:27,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:27,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:28,062 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:25:28,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:28,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839232709] [2022-11-03 02:25:28,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839232709] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:25:28,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481807381] [2022-11-03 02:25:28,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:28,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:28,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_875c160f-9e3f-4f65-aa4d-3c9f0991ec03/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:25:28,066 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_875c160f-9e3f-4f65-aa4d-3c9f0991ec03/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:25:28,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_875c160f-9e3f-4f65-aa4d-3c9f0991ec03/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:25:28,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:28,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:25:28,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:25:28,349 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:25:28,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:25:28,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481807381] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:28,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:25:28,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:25:28,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502974824] [2022-11-03 02:25:28,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:28,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:25:28,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:28,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:25:28,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:25:28,364 INFO L87 Difference]: Start difference. First operand 1277 states and 1994 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:25:28,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:28,673 INFO L93 Difference]: Finished difference Result 3788 states and 6084 transitions. [2022-11-03 02:25:28,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:25:28,675 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 108 [2022-11-03 02:25:28,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:28,689 INFO L225 Difference]: With dead ends: 3788 [2022-11-03 02:25:28,689 INFO L226 Difference]: Without dead ends: 2517 [2022-11-03 02:25:28,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:25:28,698 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 184 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:28,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 358 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:25:28,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2517 states. [2022-11-03 02:25:28,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2517 to 2505. [2022-11-03 02:25:28,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2505 states, 2052 states have (on average 1.489278752436647) internal successors, (3056), 2065 states have internal predecessors, (3056), 332 states have call successors, (332), 120 states have call predecessors, (332), 120 states have return successors, (500), 320 states have call predecessors, (500), 332 states have call successors, (500) [2022-11-03 02:25:28,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2505 states to 2505 states and 3888 transitions. [2022-11-03 02:25:28,928 INFO L78 Accepts]: Start accepts. Automaton has 2505 states and 3888 transitions. Word has length 108 [2022-11-03 02:25:28,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:28,929 INFO L495 AbstractCegarLoop]: Abstraction has 2505 states and 3888 transitions. [2022-11-03 02:25:28,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:25:28,929 INFO L276 IsEmpty]: Start isEmpty. Operand 2505 states and 3888 transitions. [2022-11-03 02:25:28,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 02:25:28,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:28,936 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, 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] [2022-11-03 02:25:28,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_875c160f-9e3f-4f65-aa4d-3c9f0991ec03/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:25:29,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_875c160f-9e3f-4f65-aa4d-3c9f0991ec03/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 02:25:29,151 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:29,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:29,151 INFO L85 PathProgramCache]: Analyzing trace with hash 972062029, now seen corresponding path program 1 times [2022-11-03 02:25:29,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:29,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393580911] [2022-11-03 02:25:29,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:29,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:29,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:29,304 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:25:29,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:29,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393580911] [2022-11-03 02:25:29,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393580911] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:25:29,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530439768] [2022-11-03 02:25:29,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:29,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:29,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_875c160f-9e3f-4f65-aa4d-3c9f0991ec03/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:25:29,306 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_875c160f-9e3f-4f65-aa4d-3c9f0991ec03/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:25:29,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_875c160f-9e3f-4f65-aa4d-3c9f0991ec03/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:25:29,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:29,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:25:29,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:25:29,584 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:25:29,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:25:29,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530439768] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:29,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:25:29,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:25:29,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307347927] [2022-11-03 02:25:29,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:29,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:25:29,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:29,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:25:29,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:25:29,587 INFO L87 Difference]: Start difference. First operand 2505 states and 3888 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:25:30,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:30,061 INFO L93 Difference]: Finished difference Result 7442 states and 11869 transitions. [2022-11-03 02:25:30,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:25:30,062 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 108 [2022-11-03 02:25:30,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:30,096 INFO L225 Difference]: With dead ends: 7442 [2022-11-03 02:25:30,096 INFO L226 Difference]: Without dead ends: 4943 [2022-11-03 02:25:30,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:25:30,108 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 178 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:30,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 358 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:25:30,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4943 states. [2022-11-03 02:25:30,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4943 to 4921. [2022-11-03 02:25:30,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4921 states, 4040 states have (on average 1.4821782178217822) internal successors, (5988), 4065 states have internal predecessors, (5988), 640 states have call successors, (640), 240 states have call predecessors, (640), 240 states have return successors, (960), 616 states have call predecessors, (960), 640 states have call successors, (960) [2022-11-03 02:25:30,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4921 states to 4921 states and 7588 transitions. [2022-11-03 02:25:30,601 INFO L78 Accepts]: Start accepts. Automaton has 4921 states and 7588 transitions. Word has length 108 [2022-11-03 02:25:30,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:30,602 INFO L495 AbstractCegarLoop]: Abstraction has 4921 states and 7588 transitions. [2022-11-03 02:25:30,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:25:30,603 INFO L276 IsEmpty]: Start isEmpty. Operand 4921 states and 7588 transitions. [2022-11-03 02:25:30,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 02:25:30,614 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:30,614 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, 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] [2022-11-03 02:25:30,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_875c160f-9e3f-4f65-aa4d-3c9f0991ec03/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:25:30,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_875c160f-9e3f-4f65-aa4d-3c9f0991ec03/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-03 02:25:30,839 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:30,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:30,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1593615443, now seen corresponding path program 1 times [2022-11-03 02:25:30,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:30,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348880908] [2022-11-03 02:25:30,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:30,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:30,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:30,995 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:25:30,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:30,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348880908] [2022-11-03 02:25:30,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348880908] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:25:30,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540886479] [2022-11-03 02:25:30,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:30,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:30,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_875c160f-9e3f-4f65-aa4d-3c9f0991ec03/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:25:30,997 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_875c160f-9e3f-4f65-aa4d-3c9f0991ec03/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:25:31,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_875c160f-9e3f-4f65-aa4d-3c9f0991ec03/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:25:31,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:31,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:25:31,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:25:31,280 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:25:31,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:25:31,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540886479] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:31,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:25:31,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:25:31,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415417122] [2022-11-03 02:25:31,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:31,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:25:31,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:31,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:25:31,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:25:31,284 INFO L87 Difference]: Start difference. First operand 4921 states and 7588 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:25:32,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:32,078 INFO L93 Difference]: Finished difference Result 14630 states and 23157 transitions. [2022-11-03 02:25:32,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:25:32,079 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 108 [2022-11-03 02:25:32,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:32,139 INFO L225 Difference]: With dead ends: 14630 [2022-11-03 02:25:32,139 INFO L226 Difference]: Without dead ends: 9715 [2022-11-03 02:25:32,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:25:32,164 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 172 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:32,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 358 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:25:32,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9715 states. [2022-11-03 02:25:33,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9715 to 9673. [2022-11-03 02:25:33,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9673 states, 7956 states have (on average 1.4746103569632982) internal successors, (11732), 8005 states have internal predecessors, (11732), 1236 states have call successors, (1236), 480 states have call predecessors, (1236), 480 states have return successors, (1844), 1188 states have call predecessors, (1844), 1236 states have call successors, (1844) [2022-11-03 02:25:33,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9673 states to 9673 states and 14812 transitions. [2022-11-03 02:25:33,184 INFO L78 Accepts]: Start accepts. Automaton has 9673 states and 14812 transitions. Word has length 108 [2022-11-03 02:25:33,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:33,184 INFO L495 AbstractCegarLoop]: Abstraction has 9673 states and 14812 transitions. [2022-11-03 02:25:33,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:25:33,185 INFO L276 IsEmpty]: Start isEmpty. Operand 9673 states and 14812 transitions. [2022-11-03 02:25:33,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 02:25:33,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:33,198 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, 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] [2022-11-03 02:25:33,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_875c160f-9e3f-4f65-aa4d-3c9f0991ec03/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:25:33,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_875c160f-9e3f-4f65-aa4d-3c9f0991ec03/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:33,415 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:33,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:33,416 INFO L85 PathProgramCache]: Analyzing trace with hash 229933581, now seen corresponding path program 1 times [2022-11-03 02:25:33,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:33,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715844862] [2022-11-03 02:25:33,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:33,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:33,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:33,566 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 02:25:33,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:33,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715844862] [2022-11-03 02:25:33,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715844862] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:33,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:25:33,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:25:33,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636703630] [2022-11-03 02:25:33,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:33,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:25:33,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:33,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:25:33,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:25:33,568 INFO L87 Difference]: Start difference. First operand 9673 states and 14812 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:25:34,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:34,569 INFO L93 Difference]: Finished difference Result 19627 states and 30781 transitions. [2022-11-03 02:25:34,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:25:34,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 108 [2022-11-03 02:25:34,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:34,660 INFO L225 Difference]: With dead ends: 19627 [2022-11-03 02:25:34,660 INFO L226 Difference]: Without dead ends: 11881 [2022-11-03 02:25:34,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:25:34,688 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 92 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:34,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 455 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:25:34,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11881 states. [2022-11-03 02:25:35,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11881 to 11097. [2022-11-03 02:25:35,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11097 states, 9316 states have (on average 1.5118076427651352) internal successors, (14084), 9365 states have internal predecessors, (14084), 1268 states have call successors, (1268), 512 states have call predecessors, (1268), 512 states have return successors, (1876), 1220 states have call predecessors, (1876), 1268 states have call successors, (1876) [2022-11-03 02:25:35,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11097 states to 11097 states and 17228 transitions. [2022-11-03 02:25:35,852 INFO L78 Accepts]: Start accepts. Automaton has 11097 states and 17228 transitions. Word has length 108 [2022-11-03 02:25:35,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:35,853 INFO L495 AbstractCegarLoop]: Abstraction has 11097 states and 17228 transitions. [2022-11-03 02:25:35,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:25:35,854 INFO L276 IsEmpty]: Start isEmpty. Operand 11097 states and 17228 transitions. [2022-11-03 02:25:35,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-03 02:25:35,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:35,895 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 02:25:35,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 02:25:35,895 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:35,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:35,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1223291041, now seen corresponding path program 1 times [2022-11-03 02:25:35,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:35,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505606425] [2022-11-03 02:25:35,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:35,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:35,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:36,050 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-03 02:25:36,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:36,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505606425] [2022-11-03 02:25:36,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505606425] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:36,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:25:36,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:25:36,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906608022] [2022-11-03 02:25:36,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:36,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:25:36,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:36,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:25:36,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:25:36,054 INFO L87 Difference]: Start difference. First operand 11097 states and 17228 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:25:37,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:37,755 INFO L93 Difference]: Finished difference Result 32926 states and 52193 transitions. [2022-11-03 02:25:37,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:25:37,756 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 146 [2022-11-03 02:25:37,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:37,879 INFO L225 Difference]: With dead ends: 32926 [2022-11-03 02:25:37,879 INFO L226 Difference]: Without dead ends: 21835 [2022-11-03 02:25:38,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:25:38,029 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 178 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:38,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 360 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:25:38,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21835 states. [2022-11-03 02:25:39,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21835 to 21721. [2022-11-03 02:25:39,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21721 states, 18244 states have (on average 1.5016443762332823) internal successors, (27396), 18341 states have internal predecessors, (27396), 2452 states have call successors, (2452), 1024 states have call predecessors, (2452), 1024 states have return successors, (3604), 2356 states have call predecessors, (3604), 2452 states have call successors, (3604) [2022-11-03 02:25:40,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21721 states to 21721 states and 33452 transitions. [2022-11-03 02:25:40,122 INFO L78 Accepts]: Start accepts. Automaton has 21721 states and 33452 transitions. Word has length 146 [2022-11-03 02:25:40,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:40,124 INFO L495 AbstractCegarLoop]: Abstraction has 21721 states and 33452 transitions. [2022-11-03 02:25:40,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:25:40,124 INFO L276 IsEmpty]: Start isEmpty. Operand 21721 states and 33452 transitions. [2022-11-03 02:25:40,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-03 02:25:40,196 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:40,197 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 02:25:40,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 02:25:40,197 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:40,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:40,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1633320704, now seen corresponding path program 1 times [2022-11-03 02:25:40,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:40,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959334176] [2022-11-03 02:25:40,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:40,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:40,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:40,350 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-03 02:25:40,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:40,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959334176] [2022-11-03 02:25:40,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959334176] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:40,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:25:40,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:25:40,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575516145] [2022-11-03 02:25:40,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:40,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:25:40,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:40,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:25:40,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:25:40,355 INFO L87 Difference]: Start difference. First operand 21721 states and 33452 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:25:43,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:43,169 INFO L93 Difference]: Finished difference Result 64446 states and 101249 transitions. [2022-11-03 02:25:43,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:25:43,170 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 146 [2022-11-03 02:25:43,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:43,379 INFO L225 Difference]: With dead ends: 64446 [2022-11-03 02:25:43,380 INFO L226 Difference]: Without dead ends: 42731 [2022-11-03 02:25:43,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:25:43,463 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 180 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:43,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 360 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:25:43,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42731 states. [2022-11-03 02:25:46,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42731 to 42505. [2022-11-03 02:25:46,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42505 states, 35716 states have (on average 1.4909844327472281) internal successors, (53252), 35909 states have internal predecessors, (53252), 4740 states have call successors, (4740), 2048 states have call predecessors, (4740), 2048 states have return successors, (6916), 4548 states have call predecessors, (6916), 4740 states have call successors, (6916) [2022-11-03 02:25:46,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42505 states to 42505 states and 64908 transitions. [2022-11-03 02:25:46,873 INFO L78 Accepts]: Start accepts. Automaton has 42505 states and 64908 transitions. Word has length 146 [2022-11-03 02:25:46,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:46,874 INFO L495 AbstractCegarLoop]: Abstraction has 42505 states and 64908 transitions. [2022-11-03 02:25:46,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:25:46,874 INFO L276 IsEmpty]: Start isEmpty. Operand 42505 states and 64908 transitions. [2022-11-03 02:25:47,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-03 02:25:47,009 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:47,009 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 02:25:47,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 02:25:47,009 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:47,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:47,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1905401878, now seen corresponding path program 1 times [2022-11-03 02:25:47,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:47,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870394322] [2022-11-03 02:25:47,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:47,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:47,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:47,133 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-03 02:25:47,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:47,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870394322] [2022-11-03 02:25:47,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870394322] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:47,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:25:47,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:25:47,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046176411] [2022-11-03 02:25:47,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:47,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:25:47,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:47,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:25:47,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:25:47,136 INFO L87 Difference]: Start difference. First operand 42505 states and 64908 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:25:52,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:52,129 INFO L93 Difference]: Finished difference Result 126094 states and 196241 transitions. [2022-11-03 02:25:52,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:25:52,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 146 [2022-11-03 02:25:52,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:52,610 INFO L225 Difference]: With dead ends: 126094 [2022-11-03 02:25:52,610 INFO L226 Difference]: Without dead ends: 83595 [2022-11-03 02:25:52,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:25:52,794 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 183 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:52,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 368 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:25:52,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83595 states. [2022-11-03 02:25:58,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83595 to 83145. [2022-11-03 02:25:58,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83145 states, 69892 states have (on average 1.4798260172838094) internal successors, (103428), 70277 states have internal predecessors, (103428), 9156 states have call successors, (9156), 4096 states have call predecessors, (9156), 4096 states have return successors, (13252), 8772 states have call predecessors, (13252), 9156 states have call successors, (13252) [2022-11-03 02:25:58,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83145 states to 83145 states and 125836 transitions. [2022-11-03 02:25:58,757 INFO L78 Accepts]: Start accepts. Automaton has 83145 states and 125836 transitions. Word has length 146 [2022-11-03 02:25:58,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:58,757 INFO L495 AbstractCegarLoop]: Abstraction has 83145 states and 125836 transitions. [2022-11-03 02:25:58,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:25:58,758 INFO L276 IsEmpty]: Start isEmpty. Operand 83145 states and 125836 transitions. [2022-11-03 02:25:59,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-03 02:25:59,120 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:59,120 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 02:25:59,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 02:25:59,120 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:59,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:59,121 INFO L85 PathProgramCache]: Analyzing trace with hash 790412858, now seen corresponding path program 1 times [2022-11-03 02:25:59,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:59,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109700417] [2022-11-03 02:25:59,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:59,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:59,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:59,222 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-03 02:25:59,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:59,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109700417] [2022-11-03 02:25:59,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109700417] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:59,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:25:59,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:25:59,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372735049] [2022-11-03 02:25:59,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:59,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:25:59,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:59,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:25:59,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:25:59,225 INFO L87 Difference]: Start difference. First operand 83145 states and 125836 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10)