./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.08.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0dda87-b2e7-40b3-98cc-0a05c39460f4/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0dda87-b2e7-40b3-98cc-0a05c39460f4/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0dda87-b2e7-40b3-98cc-0a05c39460f4/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0dda87-b2e7-40b3-98cc-0a05c39460f4/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.08.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0dda87-b2e7-40b3-98cc-0a05c39460f4/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0dda87-b2e7-40b3-98cc-0a05c39460f4/bin/utaipan-EQgc7hIp5V --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 fa372dfad40872d8fec1a0f5d039a19d9bc91cfd74858ce24ec80eeafb27f017 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:10:57,881 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:10:57,884 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:10:57,939 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:10:57,940 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:10:57,945 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:10:57,948 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:10:57,953 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:10:57,956 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:10:57,965 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:10:57,966 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:10:57,968 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:10:57,968 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:10:57,972 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:10:57,975 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:10:57,981 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:10:57,982 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:10:57,986 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:10:57,990 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:10:57,997 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:10:58,000 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:10:58,002 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:10:58,005 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:10:58,006 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:10:58,012 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:10:58,013 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:10:58,013 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:10:58,015 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:10:58,016 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:10:58,017 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:10:58,019 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:10:58,020 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:10:58,022 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:10:58,023 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:10:58,025 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:10:58,026 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:10:58,026 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:10:58,027 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:10:58,027 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:10:58,028 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:10:58,029 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:10:58,030 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0dda87-b2e7-40b3-98cc-0a05c39460f4/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:10:58,077 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:10:58,080 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:10:58,081 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:10:58,081 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:10:58,089 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:10:58,089 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:10:58,090 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:10:58,090 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:10:58,090 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:10:58,090 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:10:58,091 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:10:58,092 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:10:58,092 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:10:58,092 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:10:58,092 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:10:58,093 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:10:58,093 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:10:58,093 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:10:58,094 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:10:58,094 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:10:58,095 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:10:58,095 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:10:58,095 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:10:58,095 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:10:58,095 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:10:58,096 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:10:58,096 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:10:58,096 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:10:58,096 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:10:58,097 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:10:58,097 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:10:58,097 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:10:58,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:10:58,098 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:10:58,098 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:10:58,098 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:10:58,099 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:10:58,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:10:58,099 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:10:58,099 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:10:58,100 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:10:58,100 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_4f0dda87-b2e7-40b3-98cc-0a05c39460f4/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0dda87-b2e7-40b3-98cc-0a05c39460f4/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa372dfad40872d8fec1a0f5d039a19d9bc91cfd74858ce24ec80eeafb27f017 [2021-11-23 03:10:58,410 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:10:58,438 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:10:58,441 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:10:58,443 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:10:58,444 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:10:58,445 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0dda87-b2e7-40b3-98cc-0a05c39460f4/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/openssl/s3_srvr.blast.08.i.cil-1.c [2021-11-23 03:10:58,538 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0dda87-b2e7-40b3-98cc-0a05c39460f4/bin/utaipan-EQgc7hIp5V/data/6cdd974f2/723af3b70a7b413589fb6dbc1630e2a5/FLAGfa7f8782a [2021-11-23 03:10:59,145 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:10:59,146 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0dda87-b2e7-40b3-98cc-0a05c39460f4/sv-benchmarks/c/openssl/s3_srvr.blast.08.i.cil-1.c [2021-11-23 03:10:59,182 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0dda87-b2e7-40b3-98cc-0a05c39460f4/bin/utaipan-EQgc7hIp5V/data/6cdd974f2/723af3b70a7b413589fb6dbc1630e2a5/FLAGfa7f8782a [2021-11-23 03:10:59,394 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0dda87-b2e7-40b3-98cc-0a05c39460f4/bin/utaipan-EQgc7hIp5V/data/6cdd974f2/723af3b70a7b413589fb6dbc1630e2a5 [2021-11-23 03:10:59,397 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:10:59,398 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:10:59,403 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:10:59,403 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:10:59,407 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:10:59,408 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:10:59" (1/1) ... [2021-11-23 03:10:59,410 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46312402 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:10:59, skipping insertion in model container [2021-11-23 03:10:59,411 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:10:59" (1/1) ... [2021-11-23 03:10:59,418 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:10:59,516 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:10:59,953 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_4f0dda87-b2e7-40b3-98cc-0a05c39460f4/sv-benchmarks/c/openssl/s3_srvr.blast.08.i.cil-1.c[74696,74709] [2021-11-23 03:10:59,985 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:11:00,012 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:11:00,222 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_4f0dda87-b2e7-40b3-98cc-0a05c39460f4/sv-benchmarks/c/openssl/s3_srvr.blast.08.i.cil-1.c[74696,74709] [2021-11-23 03:11:00,225 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:11:00,246 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:11:00,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:00 WrapperNode [2021-11-23 03:11:00,247 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:11:00,248 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:11:00,249 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:11:00,249 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:11:00,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:00" (1/1) ... [2021-11-23 03:11:00,300 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:00" (1/1) ... [2021-11-23 03:11:00,364 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 794 [2021-11-23 03:11:00,377 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:11:00,378 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:11:00,379 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:11:00,379 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:11:00,389 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:00" (1/1) ... [2021-11-23 03:11:00,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:00" (1/1) ... [2021-11-23 03:11:00,407 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:00" (1/1) ... [2021-11-23 03:11:00,421 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:00" (1/1) ... [2021-11-23 03:11:00,460 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:00" (1/1) ... [2021-11-23 03:11:00,468 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:00" (1/1) ... [2021-11-23 03:11:00,486 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:00" (1/1) ... [2021-11-23 03:11:00,493 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:11:00,494 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:11:00,494 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:11:00,494 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:11:00,495 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:00" (1/1) ... [2021-11-23 03:11:00,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:11:00,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0dda87-b2e7-40b3-98cc-0a05c39460f4/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:11:00,545 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0dda87-b2e7-40b3-98cc-0a05c39460f4/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:11:00,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0dda87-b2e7-40b3-98cc-0a05c39460f4/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:11:00,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:11:00,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 03:11:00,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:11:00,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:11:00,618 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 03:11:00,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:11:00,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 03:11:00,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:11:00,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:11:00,816 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:11:00,832 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:11:00,852 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 03:11:02,396 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-23 03:11:02,396 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-23 03:11:02,396 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:11:02,820 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:11:02,820 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 03:11:02,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:11:02 BoogieIcfgContainer [2021-11-23 03:11:02,823 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:11:02,825 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:11:02,825 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:11:02,828 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:11:02,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:10:59" (1/3) ... [2021-11-23 03:11:02,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20cbe365 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:11:02, skipping insertion in model container [2021-11-23 03:11:02,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:00" (2/3) ... [2021-11-23 03:11:02,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20cbe365 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:11:02, skipping insertion in model container [2021-11-23 03:11:02,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:11:02" (3/3) ... [2021-11-23 03:11:02,833 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.08.i.cil-1.c [2021-11-23 03:11:02,842 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:11:02,842 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:11:02,905 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:11:02,919 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:11:02,920 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:11:02,950 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 108 states have (on average 1.7592592592592593) internal successors, (190), 109 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:02,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 03:11:02,965 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:11:02,966 INFO L514 BasicCegarLoop]: 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] [2021-11-23 03:11:02,967 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:11:02,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:11:02,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1964653001, now seen corresponding path program 1 times [2021-11-23 03:11:02,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:11:02,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753179736] [2021-11-23 03:11:02,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:02,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:11:03,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:11:03,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:11:03,503 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:11:03,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753179736] [2021-11-23 03:11:03,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753179736] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:11:03,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:11:03,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:11:03,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630178574] [2021-11-23 03:11:03,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:11:03,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:11:03,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:11:03,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:11:03,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:11:03,544 INFO L87 Difference]: Start difference. First operand has 110 states, 108 states have (on average 1.7592592592592593) internal successors, (190), 109 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:05,574 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:11:06,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:11:06,178 INFO L93 Difference]: Finished difference Result 243 states and 420 transitions. [2021-11-23 03:11:06,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:11:06,190 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-23 03:11:06,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:11:06,205 INFO L225 Difference]: With dead ends: 243 [2021-11-23 03:11:06,205 INFO L226 Difference]: Without dead ends: 129 [2021-11-23 03:11:06,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:11:06,212 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 20 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:11:06,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 405 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 154 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2021-11-23 03:11:06,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-23 03:11:06,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 117. [2021-11-23 03:11:06,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.543103448275862) internal successors, (179), 116 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:06,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 179 transitions. [2021-11-23 03:11:06,262 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 179 transitions. Word has length 37 [2021-11-23 03:11:06,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:11:06,263 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 179 transitions. [2021-11-23 03:11:06,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:06,263 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 179 transitions. [2021-11-23 03:11:06,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-23 03:11:06,266 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:11:06,267 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:11:06,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:11:06,267 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:11:06,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:11:06,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1158599739, now seen corresponding path program 1 times [2021-11-23 03:11:06,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:11:06,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934768851] [2021-11-23 03:11:06,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:06,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:11:06,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:11:06,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:11:06,378 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:11:06,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934768851] [2021-11-23 03:11:06,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934768851] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:11:06,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:11:06,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:11:06,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555817227] [2021-11-23 03:11:06,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:11:06,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:11:06,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:11:06,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:11:06,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:11:06,383 INFO L87 Difference]: Start difference. First operand 117 states and 179 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:08,397 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:11:08,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:11:08,838 INFO L93 Difference]: Finished difference Result 234 states and 352 transitions. [2021-11-23 03:11:08,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:11:08,841 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-23 03:11:08,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:11:08,842 INFO L225 Difference]: With dead ends: 234 [2021-11-23 03:11:08,843 INFO L226 Difference]: Without dead ends: 129 [2021-11-23 03:11:08,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:11:08,845 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 19 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:11:08,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 337 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 142 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-23 03:11:08,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-23 03:11:08,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 117. [2021-11-23 03:11:08,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.5344827586206897) internal successors, (178), 116 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:08,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 178 transitions. [2021-11-23 03:11:08,870 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 178 transitions. Word has length 47 [2021-11-23 03:11:08,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:11:08,870 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 178 transitions. [2021-11-23 03:11:08,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:08,871 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 178 transitions. [2021-11-23 03:11:08,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-23 03:11:08,878 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:11:08,879 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:11:08,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:11:08,879 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:11:08,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:11:08,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1726939284, now seen corresponding path program 1 times [2021-11-23 03:11:08,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:11:08,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504536663] [2021-11-23 03:11:08,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:08,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:11:08,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:11:09,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:11:09,005 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:11:09,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504536663] [2021-11-23 03:11:09,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504536663] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:11:09,006 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:11:09,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:11:09,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237820197] [2021-11-23 03:11:09,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:11:09,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:11:09,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:11:09,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:11:09,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:11:09,008 INFO L87 Difference]: Start difference. First operand 117 states and 178 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:11,021 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:11:11,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:11:11,401 INFO L93 Difference]: Finished difference Result 234 states and 351 transitions. [2021-11-23 03:11:11,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:11:11,403 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-23 03:11:11,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:11:11,404 INFO L225 Difference]: With dead ends: 234 [2021-11-23 03:11:11,404 INFO L226 Difference]: Without dead ends: 129 [2021-11-23 03:11:11,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:11:11,407 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 17 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:11:11,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 336 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 143 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-23 03:11:11,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-23 03:11:11,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 117. [2021-11-23 03:11:11,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.5258620689655173) internal successors, (177), 116 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:11,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 177 transitions. [2021-11-23 03:11:11,420 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 177 transitions. Word has length 48 [2021-11-23 03:11:11,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:11:11,421 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 177 transitions. [2021-11-23 03:11:11,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:11,421 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 177 transitions. [2021-11-23 03:11:11,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-23 03:11:11,423 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:11:11,423 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 03:11:11,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 03:11:11,424 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:11:11,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:11:11,424 INFO L85 PathProgramCache]: Analyzing trace with hash -54909042, now seen corresponding path program 1 times [2021-11-23 03:11:11,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:11:11,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338276322] [2021-11-23 03:11:11,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:11,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:11:11,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:11:11,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:11:11,532 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:11:11,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338276322] [2021-11-23 03:11:11,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338276322] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:11:11,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:11:11,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:11:11,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869500521] [2021-11-23 03:11:11,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:11:11,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:11:11,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:11:11,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:11:11,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:11:11,542 INFO L87 Difference]: Start difference. First operand 117 states and 177 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:13,554 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:11:14,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:11:14,019 INFO L93 Difference]: Finished difference Result 234 states and 350 transitions. [2021-11-23 03:11:14,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:11:14,021 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-23 03:11:14,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:11:14,023 INFO L225 Difference]: With dead ends: 234 [2021-11-23 03:11:14,023 INFO L226 Difference]: Without dead ends: 129 [2021-11-23 03:11:14,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:11:14,025 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 15 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:11:14,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 336 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 143 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-23 03:11:14,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-23 03:11:14,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 117. [2021-11-23 03:11:14,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.5172413793103448) internal successors, (176), 116 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:14,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 176 transitions. [2021-11-23 03:11:14,052 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 176 transitions. Word has length 49 [2021-11-23 03:11:14,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:11:14,053 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 176 transitions. [2021-11-23 03:11:14,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:14,053 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 176 transitions. [2021-11-23 03:11:14,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-23 03:11:14,055 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:11:14,055 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 03:11:14,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 03:11:14,056 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:11:14,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:11:14,056 INFO L85 PathProgramCache]: Analyzing trace with hash -645975134, now seen corresponding path program 1 times [2021-11-23 03:11:14,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:11:14,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701592818] [2021-11-23 03:11:14,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:14,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:11:14,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:11:14,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:11:14,177 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:11:14,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701592818] [2021-11-23 03:11:14,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701592818] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:11:14,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:11:14,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:11:14,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573160640] [2021-11-23 03:11:14,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:11:14,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:11:14,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:11:14,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:11:14,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:11:14,180 INFO L87 Difference]: Start difference. First operand 117 states and 176 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:16,192 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:11:16,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:11:16,538 INFO L93 Difference]: Finished difference Result 234 states and 349 transitions. [2021-11-23 03:11:16,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:11:16,540 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-23 03:11:16,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:11:16,541 INFO L225 Difference]: With dead ends: 234 [2021-11-23 03:11:16,541 INFO L226 Difference]: Without dead ends: 129 [2021-11-23 03:11:16,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:11:16,544 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 11 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:11:16,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 336 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 143 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-23 03:11:16,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-23 03:11:16,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 117. [2021-11-23 03:11:16,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.5086206896551724) internal successors, (175), 116 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:16,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 175 transitions. [2021-11-23 03:11:16,555 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 175 transitions. Word has length 49 [2021-11-23 03:11:16,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:11:16,556 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 175 transitions. [2021-11-23 03:11:16,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:16,556 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 175 transitions. [2021-11-23 03:11:16,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-23 03:11:16,558 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:11:16,558 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 03:11:16,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 03:11:16,559 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:11:16,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:11:16,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1388991025, now seen corresponding path program 1 times [2021-11-23 03:11:16,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:11:16,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371234735] [2021-11-23 03:11:16,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:16,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:11:16,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:11:16,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:11:16,635 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:11:16,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371234735] [2021-11-23 03:11:16,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371234735] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:11:16,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:11:16,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:11:16,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212429970] [2021-11-23 03:11:16,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:11:16,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:11:16,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:11:16,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:11:16,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:11:16,637 INFO L87 Difference]: Start difference. First operand 117 states and 175 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:18,650 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:11:19,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:11:19,035 INFO L93 Difference]: Finished difference Result 234 states and 348 transitions. [2021-11-23 03:11:19,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:11:19,037 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-23 03:11:19,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:11:19,038 INFO L225 Difference]: With dead ends: 234 [2021-11-23 03:11:19,038 INFO L226 Difference]: Without dead ends: 129 [2021-11-23 03:11:19,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:11:19,039 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 9 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:11:19,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 337 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 142 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-23 03:11:19,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-23 03:11:19,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 117. [2021-11-23 03:11:19,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.5) internal successors, (174), 116 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:19,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 174 transitions. [2021-11-23 03:11:19,079 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 174 transitions. Word has length 49 [2021-11-23 03:11:19,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:11:19,080 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 174 transitions. [2021-11-23 03:11:19,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:19,080 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 174 transitions. [2021-11-23 03:11:19,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-23 03:11:19,082 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:11:19,082 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 03:11:19,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 03:11:19,083 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:11:19,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:11:19,084 INFO L85 PathProgramCache]: Analyzing trace with hash 402336000, now seen corresponding path program 1 times [2021-11-23 03:11:19,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:11:19,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711579054] [2021-11-23 03:11:19,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:19,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:11:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:11:19,161 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:11:19,161 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:11:19,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711579054] [2021-11-23 03:11:19,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711579054] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:11:19,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:11:19,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:11:19,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580850203] [2021-11-23 03:11:19,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:11:19,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:11:19,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:11:19,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:11:19,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:11:19,165 INFO L87 Difference]: Start difference. First operand 117 states and 174 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:21,177 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:11:21,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:11:21,504 INFO L93 Difference]: Finished difference Result 232 states and 345 transitions. [2021-11-23 03:11:21,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:11:21,506 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-23 03:11:21,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:11:21,507 INFO L225 Difference]: With dead ends: 232 [2021-11-23 03:11:21,507 INFO L226 Difference]: Without dead ends: 127 [2021-11-23 03:11:21,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:11:21,509 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 9 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:11:21,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 340 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 139 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-23 03:11:21,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-23 03:11:21,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 117. [2021-11-23 03:11:21,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.4913793103448276) internal successors, (173), 116 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:21,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 173 transitions. [2021-11-23 03:11:21,518 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 173 transitions. Word has length 50 [2021-11-23 03:11:21,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:11:21,518 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 173 transitions. [2021-11-23 03:11:21,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:21,519 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 173 transitions. [2021-11-23 03:11:21,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-23 03:11:21,521 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:11:21,521 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 03:11:21,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 03:11:21,522 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:11:21,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:11:21,523 INFO L85 PathProgramCache]: Analyzing trace with hash -590081401, now seen corresponding path program 1 times [2021-11-23 03:11:21,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:11:21,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504560670] [2021-11-23 03:11:21,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:21,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:11:21,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:11:21,590 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:11:21,590 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:11:21,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504560670] [2021-11-23 03:11:21,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504560670] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:11:21,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:11:21,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:11:21,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940289650] [2021-11-23 03:11:21,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:11:21,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:11:21,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:11:21,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:11:21,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:11:21,593 INFO L87 Difference]: Start difference. First operand 117 states and 173 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:23,606 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:11:23,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:11:23,936 INFO L93 Difference]: Finished difference Result 232 states and 344 transitions. [2021-11-23 03:11:23,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:11:23,937 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-23 03:11:23,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:11:23,938 INFO L225 Difference]: With dead ends: 232 [2021-11-23 03:11:23,938 INFO L226 Difference]: Without dead ends: 127 [2021-11-23 03:11:23,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:11:23,939 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 11 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:11:23,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 340 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 139 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-23 03:11:23,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-23 03:11:23,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 117. [2021-11-23 03:11:23,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.4827586206896552) internal successors, (172), 116 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:23,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 172 transitions. [2021-11-23 03:11:23,947 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 172 transitions. Word has length 50 [2021-11-23 03:11:23,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:11:23,948 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 172 transitions. [2021-11-23 03:11:23,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:23,948 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 172 transitions. [2021-11-23 03:11:23,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-23 03:11:23,950 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:11:23,950 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 03:11:23,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 03:11:23,951 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:11:23,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:11:23,951 INFO L85 PathProgramCache]: Analyzing trace with hash -829057655, now seen corresponding path program 1 times [2021-11-23 03:11:23,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:11:23,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643925520] [2021-11-23 03:11:23,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:23,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:11:23,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:11:24,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:11:24,016 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:11:24,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643925520] [2021-11-23 03:11:24,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643925520] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:11:24,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:11:24,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:11:24,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920210865] [2021-11-23 03:11:24,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:11:24,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:11:24,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:11:24,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:11:24,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:11:24,018 INFO L87 Difference]: Start difference. First operand 117 states and 172 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:26,030 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:11:26,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:11:26,374 INFO L93 Difference]: Finished difference Result 224 states and 333 transitions. [2021-11-23 03:11:26,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:11:26,376 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-23 03:11:26,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:11:26,377 INFO L225 Difference]: With dead ends: 224 [2021-11-23 03:11:26,377 INFO L226 Difference]: Without dead ends: 119 [2021-11-23 03:11:26,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:11:26,378 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 5 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:11:26,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 350 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 129 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-23 03:11:26,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-23 03:11:26,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2021-11-23 03:11:26,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.4741379310344827) internal successors, (171), 116 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:26,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 171 transitions. [2021-11-23 03:11:26,387 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 171 transitions. Word has length 51 [2021-11-23 03:11:26,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:11:26,388 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 171 transitions. [2021-11-23 03:11:26,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:26,388 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 171 transitions. [2021-11-23 03:11:26,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-23 03:11:26,390 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:11:26,390 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 03:11:26,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 03:11:26,390 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:11:26,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:11:26,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1409467472, now seen corresponding path program 1 times [2021-11-23 03:11:26,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:11:26,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613516702] [2021-11-23 03:11:26,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:26,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:11:26,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:11:26,473 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:11:26,474 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:11:26,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613516702] [2021-11-23 03:11:26,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613516702] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:11:26,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:11:26,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:11:26,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395039013] [2021-11-23 03:11:26,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:11:26,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:11:26,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:11:26,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:11:26,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:11:26,477 INFO L87 Difference]: Start difference. First operand 117 states and 171 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:28,490 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:11:28,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:11:28,836 INFO L93 Difference]: Finished difference Result 256 states and 381 transitions. [2021-11-23 03:11:28,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:11:28,837 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-23 03:11:28,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:11:28,839 INFO L225 Difference]: With dead ends: 256 [2021-11-23 03:11:28,839 INFO L226 Difference]: Without dead ends: 151 [2021-11-23 03:11:28,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:11:28,840 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 21 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:11:28,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 345 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 158 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-23 03:11:28,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-23 03:11:28,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 137. [2021-11-23 03:11:28,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.5073529411764706) internal successors, (205), 136 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:28,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 205 transitions. [2021-11-23 03:11:28,848 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 205 transitions. Word has length 52 [2021-11-23 03:11:28,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:11:28,848 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 205 transitions. [2021-11-23 03:11:28,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:28,849 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 205 transitions. [2021-11-23 03:11:28,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-23 03:11:28,850 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:11:28,850 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-23 03:11:28,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 03:11:28,851 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:11:28,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:11:28,852 INFO L85 PathProgramCache]: Analyzing trace with hash 456164980, now seen corresponding path program 1 times [2021-11-23 03:11:28,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:11:28,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781991451] [2021-11-23 03:11:28,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:28,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:11:28,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:11:28,924 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:11:28,924 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:11:28,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781991451] [2021-11-23 03:11:28,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781991451] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:11:28,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:11:28,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:11:28,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404876310] [2021-11-23 03:11:28,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:11:28,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:11:28,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:11:28,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:11:28,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:11:28,927 INFO L87 Difference]: Start difference. First operand 137 states and 205 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:30,941 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:11:31,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:11:31,276 INFO L93 Difference]: Finished difference Result 276 states and 414 transitions. [2021-11-23 03:11:31,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:11:31,278 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-23 03:11:31,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:11:31,279 INFO L225 Difference]: With dead ends: 276 [2021-11-23 03:11:31,279 INFO L226 Difference]: Without dead ends: 151 [2021-11-23 03:11:31,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:11:31,280 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 32 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:11:31,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 347 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 155 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-23 03:11:31,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-23 03:11:31,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 137. [2021-11-23 03:11:31,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.5) internal successors, (204), 136 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:31,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 204 transitions. [2021-11-23 03:11:31,288 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 204 transitions. Word has length 62 [2021-11-23 03:11:31,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:11:31,288 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 204 transitions. [2021-11-23 03:11:31,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:31,289 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 204 transitions. [2021-11-23 03:11:31,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-23 03:11:31,290 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:11:31,290 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-23 03:11:31,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 03:11:31,290 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:11:31,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:11:31,291 INFO L85 PathProgramCache]: Analyzing trace with hash -2027580333, now seen corresponding path program 1 times [2021-11-23 03:11:31,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:11:31,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765684925] [2021-11-23 03:11:31,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:31,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:11:31,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:11:31,394 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:11:31,395 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:11:31,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765684925] [2021-11-23 03:11:31,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765684925] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:11:31,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:11:31,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:11:31,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184385275] [2021-11-23 03:11:31,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:11:31,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:11:31,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:11:31,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:11:31,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:11:31,398 INFO L87 Difference]: Start difference. First operand 137 states and 204 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:33,410 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:11:33,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:11:33,977 INFO L93 Difference]: Finished difference Result 279 states and 419 transitions. [2021-11-23 03:11:33,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:11:33,979 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-23 03:11:33,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:11:33,980 INFO L225 Difference]: With dead ends: 279 [2021-11-23 03:11:33,980 INFO L226 Difference]: Without dead ends: 154 [2021-11-23 03:11:33,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:11:33,982 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 120 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 32 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:11:33,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 246 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 262 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-23 03:11:33,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-23 03:11:33,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2021-11-23 03:11:33,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.4736842105263157) internal successors, (224), 152 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:33,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 224 transitions. [2021-11-23 03:11:33,990 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 224 transitions. Word has length 63 [2021-11-23 03:11:33,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:11:33,990 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 224 transitions. [2021-11-23 03:11:33,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:33,991 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 224 transitions. [2021-11-23 03:11:33,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 03:11:33,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:11:33,992 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-23 03:11:33,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 03:11:33,993 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:11:33,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:11:33,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1932438102, now seen corresponding path program 1 times [2021-11-23 03:11:33,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:11:33,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173817196] [2021-11-23 03:11:33,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:33,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:11:34,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:11:34,058 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:11:34,059 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:11:34,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173817196] [2021-11-23 03:11:34,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173817196] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:11:34,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:11:34,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:11:34,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248156264] [2021-11-23 03:11:34,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:11:34,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:11:34,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:11:34,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:11:34,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:11:34,061 INFO L87 Difference]: Start difference. First operand 153 states and 224 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:36,074 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:11:36,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:11:36,410 INFO L93 Difference]: Finished difference Result 308 states and 451 transitions. [2021-11-23 03:11:36,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:11:36,411 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-23 03:11:36,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:11:36,413 INFO L225 Difference]: With dead ends: 308 [2021-11-23 03:11:36,413 INFO L226 Difference]: Without dead ends: 167 [2021-11-23 03:11:36,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:11:36,414 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 30 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:11:36,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 347 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 155 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-23 03:11:36,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-23 03:11:36,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 153. [2021-11-23 03:11:36,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.4671052631578947) internal successors, (223), 152 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:36,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 223 transitions. [2021-11-23 03:11:36,423 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 223 transitions. Word has length 64 [2021-11-23 03:11:36,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:11:36,424 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 223 transitions. [2021-11-23 03:11:36,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:36,424 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 223 transitions. [2021-11-23 03:11:36,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 03:11:36,425 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:11:36,425 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-23 03:11:36,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 03:11:36,426 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:11:36,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:11:36,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1375913061, now seen corresponding path program 1 times [2021-11-23 03:11:36,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:11:36,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099221957] [2021-11-23 03:11:36,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:36,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:11:36,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:11:36,489 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:11:36,490 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:11:36,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099221957] [2021-11-23 03:11:36,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099221957] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:11:36,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:11:36,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:11:36,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847227712] [2021-11-23 03:11:36,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:11:36,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:11:36,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:11:36,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:11:36,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:11:36,492 INFO L87 Difference]: Start difference. First operand 153 states and 223 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:38,505 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:11:38,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:11:38,825 INFO L93 Difference]: Finished difference Result 308 states and 449 transitions. [2021-11-23 03:11:38,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:11:38,826 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-23 03:11:38,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:11:38,827 INFO L225 Difference]: With dead ends: 308 [2021-11-23 03:11:38,827 INFO L226 Difference]: Without dead ends: 167 [2021-11-23 03:11:38,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:11:38,829 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 25 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:11:38,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 347 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 155 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-23 03:11:38,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-23 03:11:38,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 153. [2021-11-23 03:11:38,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.4605263157894737) internal successors, (222), 152 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:38,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 222 transitions. [2021-11-23 03:11:38,838 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 222 transitions. Word has length 64 [2021-11-23 03:11:38,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:11:38,838 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 222 transitions. [2021-11-23 03:11:38,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:38,839 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 222 transitions. [2021-11-23 03:11:38,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 03:11:38,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:11:38,840 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-23 03:11:38,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 03:11:38,840 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:11:38,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:11:38,841 INFO L85 PathProgramCache]: Analyzing trace with hash 659053098, now seen corresponding path program 1 times [2021-11-23 03:11:38,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:11:38,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350119365] [2021-11-23 03:11:38,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:38,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:11:38,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:11:38,904 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:11:38,904 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:11:38,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350119365] [2021-11-23 03:11:38,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350119365] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:11:38,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:11:38,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:11:38,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182725899] [2021-11-23 03:11:38,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:11:38,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:11:38,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:11:38,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:11:38,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:11:38,907 INFO L87 Difference]: Start difference. First operand 153 states and 222 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:40,920 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:11:41,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:11:41,309 INFO L93 Difference]: Finished difference Result 308 states and 447 transitions. [2021-11-23 03:11:41,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:11:41,311 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-23 03:11:41,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:11:41,312 INFO L225 Difference]: With dead ends: 308 [2021-11-23 03:11:41,312 INFO L226 Difference]: Without dead ends: 167 [2021-11-23 03:11:41,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:11:41,314 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 23 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:11:41,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 348 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 154 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-23 03:11:41,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-23 03:11:41,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 153. [2021-11-23 03:11:41,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.4539473684210527) internal successors, (221), 152 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:41,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 221 transitions. [2021-11-23 03:11:41,332 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 221 transitions. Word has length 64 [2021-11-23 03:11:41,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:11:41,332 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 221 transitions. [2021-11-23 03:11:41,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:41,333 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 221 transitions. [2021-11-23 03:11:41,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 03:11:41,333 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:11:41,334 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-11-23 03:11:41,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 03:11:41,334 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:11:41,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:11:41,335 INFO L85 PathProgramCache]: Analyzing trace with hash -2062409482, now seen corresponding path program 1 times [2021-11-23 03:11:41,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:11:41,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560985134] [2021-11-23 03:11:41,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:41,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:11:41,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:11:41,460 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:11:41,461 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:11:41,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560985134] [2021-11-23 03:11:41,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560985134] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:11:41,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:11:41,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:11:41,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804427320] [2021-11-23 03:11:41,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:11:41,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:11:41,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:11:41,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:11:41,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:11:41,466 INFO L87 Difference]: Start difference. First operand 153 states and 221 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:43,478 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:11:43,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:11:43,810 INFO L93 Difference]: Finished difference Result 308 states and 445 transitions. [2021-11-23 03:11:43,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:11:43,811 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-23 03:11:43,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:11:43,812 INFO L225 Difference]: With dead ends: 308 [2021-11-23 03:11:43,812 INFO L226 Difference]: Without dead ends: 167 [2021-11-23 03:11:43,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:11:43,813 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 27 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:11:43,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 347 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 155 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-23 03:11:43,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-23 03:11:43,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 153. [2021-11-23 03:11:43,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.4473684210526316) internal successors, (220), 152 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:43,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 220 transitions. [2021-11-23 03:11:43,820 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 220 transitions. Word has length 65 [2021-11-23 03:11:43,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:11:43,821 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 220 transitions. [2021-11-23 03:11:43,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:43,821 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 220 transitions. [2021-11-23 03:11:43,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 03:11:43,822 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:11:43,822 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2021-11-23 03:11:43,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 03:11:43,823 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:11:43,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:11:43,823 INFO L85 PathProgramCache]: Analyzing trace with hash -750903257, now seen corresponding path program 1 times [2021-11-23 03:11:43,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:11:43,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552013899] [2021-11-23 03:11:43,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:43,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:11:43,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:11:43,886 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:11:43,887 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:11:43,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552013899] [2021-11-23 03:11:43,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552013899] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:11:43,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:11:43,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:11:43,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655537503] [2021-11-23 03:11:43,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:11:43,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:11:43,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:11:43,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:11:43,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:11:43,889 INFO L87 Difference]: Start difference. First operand 153 states and 220 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:45,904 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:11:46,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:11:46,227 INFO L93 Difference]: Finished difference Result 306 states and 441 transitions. [2021-11-23 03:11:46,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:11:46,228 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-23 03:11:46,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:11:46,229 INFO L225 Difference]: With dead ends: 306 [2021-11-23 03:11:46,230 INFO L226 Difference]: Without dead ends: 165 [2021-11-23 03:11:46,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:11:46,230 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 22 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:11:46,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 351 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 151 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-23 03:11:46,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-23 03:11:46,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 153. [2021-11-23 03:11:46,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.4407894736842106) internal successors, (219), 152 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:46,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 219 transitions. [2021-11-23 03:11:46,237 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 219 transitions. Word has length 65 [2021-11-23 03:11:46,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:11:46,238 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 219 transitions. [2021-11-23 03:11:46,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:46,238 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 219 transitions. [2021-11-23 03:11:46,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-23 03:11:46,239 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:11:46,240 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-11-23 03:11:46,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 03:11:46,240 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:11:46,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:11:46,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1710322769, now seen corresponding path program 1 times [2021-11-23 03:11:46,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:11:46,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374423352] [2021-11-23 03:11:46,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:46,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:11:46,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:11:46,313 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:11:46,313 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:11:46,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374423352] [2021-11-23 03:11:46,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374423352] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:11:46,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:11:46,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:11:46,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076215885] [2021-11-23 03:11:46,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:11:46,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:11:46,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:11:46,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:11:46,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:11:46,316 INFO L87 Difference]: Start difference. First operand 153 states and 219 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:48,335 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:11:48,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:11:48,669 INFO L93 Difference]: Finished difference Result 306 states and 439 transitions. [2021-11-23 03:11:48,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:11:48,671 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-23 03:11:48,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:11:48,672 INFO L225 Difference]: With dead ends: 306 [2021-11-23 03:11:48,672 INFO L226 Difference]: Without dead ends: 165 [2021-11-23 03:11:48,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:11:48,674 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 24 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:11:48,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 351 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 151 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-23 03:11:48,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-23 03:11:48,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 153. [2021-11-23 03:11:48,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.4342105263157894) internal successors, (218), 152 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:48,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 218 transitions. [2021-11-23 03:11:48,682 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 218 transitions. Word has length 66 [2021-11-23 03:11:48,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:11:48,683 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 218 transitions. [2021-11-23 03:11:48,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:48,683 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 218 transitions. [2021-11-23 03:11:48,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 03:11:48,684 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:11:48,685 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-11-23 03:11:48,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 03:11:48,685 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:11:48,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:11:48,686 INFO L85 PathProgramCache]: Analyzing trace with hash 700662939, now seen corresponding path program 1 times [2021-11-23 03:11:48,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:11:48,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125392344] [2021-11-23 03:11:48,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:48,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:11:48,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:11:48,771 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:11:48,771 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:11:48,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125392344] [2021-11-23 03:11:48,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125392344] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:11:48,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:11:48,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:11:48,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341590573] [2021-11-23 03:11:48,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:11:48,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:11:48,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:11:48,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:11:48,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:11:48,776 INFO L87 Difference]: Start difference. First operand 153 states and 218 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:50,790 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:11:51,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:11:51,126 INFO L93 Difference]: Finished difference Result 298 states and 428 transitions. [2021-11-23 03:11:51,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:11:51,128 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-23 03:11:51,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:11:51,129 INFO L225 Difference]: With dead ends: 298 [2021-11-23 03:11:51,129 INFO L226 Difference]: Without dead ends: 157 [2021-11-23 03:11:51,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:11:51,131 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 18 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:11:51,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 359 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 143 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-23 03:11:51,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-23 03:11:51,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 153. [2021-11-23 03:11:51,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.4276315789473684) internal successors, (217), 152 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:51,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 217 transitions. [2021-11-23 03:11:51,140 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 217 transitions. Word has length 67 [2021-11-23 03:11:51,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:11:51,140 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 217 transitions. [2021-11-23 03:11:51,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:51,141 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 217 transitions. [2021-11-23 03:11:51,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 03:11:51,142 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:11:51,142 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-23 03:11:51,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 03:11:51,143 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:11:51,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:11:51,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1107661881, now seen corresponding path program 1 times [2021-11-23 03:11:51,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:11:51,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704308985] [2021-11-23 03:11:51,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:51,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:11:51,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:11:51,238 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:11:51,239 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:11:51,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704308985] [2021-11-23 03:11:51,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704308985] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:11:51,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759690612] [2021-11-23 03:11:51,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:51,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:11:51,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0dda87-b2e7-40b3-98cc-0a05c39460f4/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:11:51,247 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0dda87-b2e7-40b3-98cc-0a05c39460f4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:11:51,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0dda87-b2e7-40b3-98cc-0a05c39460f4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:11:51,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:11:51,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:11:51,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:11:51,802 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:11:51,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:11:52,077 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 03:11:52,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759690612] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 03:11:52,078 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:11:52,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4, 4] total 5 [2021-11-23 03:11:52,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471792000] [2021-11-23 03:11:52,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:11:52,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:11:52,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:11:52,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:11:52,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:11:52,081 INFO L87 Difference]: Start difference. First operand 153 states and 217 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:54,095 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:11:54,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:11:54,276 INFO L93 Difference]: Finished difference Result 293 states and 421 transitions. [2021-11-23 03:11:54,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:11:54,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-23 03:11:54,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:11:54,280 INFO L225 Difference]: With dead ends: 293 [2021-11-23 03:11:54,280 INFO L226 Difference]: Without dead ends: 291 [2021-11-23 03:11:54,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:11:54,281 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 110 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:11:54,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 280 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 37 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-23 03:11:54,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-11-23 03:11:54,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 288. [2021-11-23 03:11:54,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 1.4459930313588851) internal successors, (415), 287 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:54,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 415 transitions. [2021-11-23 03:11:54,298 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 415 transitions. Word has length 70 [2021-11-23 03:11:54,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:11:54,298 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 415 transitions. [2021-11-23 03:11:54,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:54,299 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 415 transitions. [2021-11-23 03:11:54,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-23 03:11:54,301 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:11:54,301 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-23 03:11:54,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0dda87-b2e7-40b3-98cc-0a05c39460f4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:11:54,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0dda87-b2e7-40b3-98cc-0a05c39460f4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-11-23 03:11:54,504 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:11:54,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:11:54,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1567340773, now seen corresponding path program 1 times [2021-11-23 03:11:54,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:11:54,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031564153] [2021-11-23 03:11:54,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:54,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:11:54,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:11:54,723 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:11:54,724 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:11:54,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031564153] [2021-11-23 03:11:54,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031564153] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:11:54,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989108093] [2021-11-23 03:11:54,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:54,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:11:54,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0dda87-b2e7-40b3-98cc-0a05c39460f4/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:11:54,726 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0dda87-b2e7-40b3-98cc-0a05c39460f4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:11:54,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0dda87-b2e7-40b3-98cc-0a05c39460f4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:11:55,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:11:55,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 03:11:55,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:11:55,399 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-23 03:11:55,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:11:56,162 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 03:11:56,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989108093] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:11:56,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [705193755] [2021-11-23 03:11:56,196 INFO L159 IcfgInterpreter]: Started Sifa with 51 locations of interest [2021-11-23 03:11:56,197 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:11:56,204 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:11:56,211 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:11:56,211 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs