./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- 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_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/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_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/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 64bit --witnessprinter.graph.data.programhash 106df4f5c2a241158f9b42d6bacea5fef4152f7015c080096ac6f687357e10b4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:56:04,024 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:56:04,026 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:56:04,070 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:56:04,070 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:56:04,072 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:56:04,074 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:56:04,077 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:56:04,080 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:56:04,082 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:56:04,083 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:56:04,085 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:56:04,086 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:56:04,088 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:56:04,090 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:56:04,092 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:56:04,093 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:56:04,095 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:56:04,097 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:56:04,100 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:56:04,103 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:56:04,105 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:56:04,107 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:56:04,111 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:56:04,116 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:56:04,120 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:56:04,120 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:56:04,121 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:56:04,122 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:56:04,124 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:56:04,124 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:56:04,126 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:56:04,127 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:56:04,128 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:56:04,129 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:56:04,129 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:56:04,130 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:56:04,130 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:56:04,130 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:56:04,131 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:56:04,132 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:56:04,135 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 03:56:04,168 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:56:04,168 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:56:04,169 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:56:04,169 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:56:04,170 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:56:04,170 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:56:04,170 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:56:04,171 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:56:04,171 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:56:04,171 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:56:04,171 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:56:04,172 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:56:04,172 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:56:04,172 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:56:04,172 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:56:04,173 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:56:04,173 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:56:04,173 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:56:04,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:56:04,174 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:56:04,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:56:04,175 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:56:04,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:56:04,175 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:56:04,175 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:56:04,176 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:56:04,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:56:04,176 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:56:04,176 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:56:04,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:56:04,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:56:04,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:56:04,177 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:56:04,178 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:56:04,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:56:04,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:56:04,178 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:56:04,179 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:56:04,179 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_4fd406a1-a667-4f50-9d7a-4519229e251a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 106df4f5c2a241158f9b42d6bacea5fef4152f7015c080096ac6f687357e10b4 [2021-11-23 03:56:04,461 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:56:04,498 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:56:04,501 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:56:04,502 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:56:04,503 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:56:04,505 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i [2021-11-23 03:56:04,598 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/data/dcd581b47/98f4f2a52e7c49889fd824484745158a/FLAGaad373390 [2021-11-23 03:56:05,649 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:56:05,651 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i [2021-11-23 03:56:05,712 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/data/dcd581b47/98f4f2a52e7c49889fd824484745158a/FLAGaad373390 [2021-11-23 03:56:06,040 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/data/dcd581b47/98f4f2a52e7c49889fd824484745158a [2021-11-23 03:56:06,043 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:56:06,045 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:56:06,048 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:56:06,048 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:56:06,052 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:56:06,053 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:56:06" (1/1) ... [2021-11-23 03:56:06,055 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55916ee7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:56:06, skipping insertion in model container [2021-11-23 03:56:06,055 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:56:06" (1/1) ... [2021-11-23 03:56:06,064 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:56:06,202 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:56:08,120 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_4fd406a1-a667-4f50-9d7a-4519229e251a/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i[247200,247213] [2021-11-23 03:56:08,239 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:56:08,271 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:56:08,635 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_4fd406a1-a667-4f50-9d7a-4519229e251a/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i[247200,247213] [2021-11-23 03:56:08,688 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:56:08,747 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:56:08,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:56:08 WrapperNode [2021-11-23 03:56:08,748 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:56:08,749 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:56:08,750 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:56:08,750 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:56:08,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:56:08" (1/1) ... [2021-11-23 03:56:08,837 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:56:08" (1/1) ... [2021-11-23 03:56:09,018 INFO L137 Inliner]: procedures = 216, calls = 1408, calls flagged for inlining = 108, calls inlined = 97, statements flattened = 3072 [2021-11-23 03:56:09,019 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:56:09,020 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:56:09,021 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:56:09,021 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:56:09,033 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:56:08" (1/1) ... [2021-11-23 03:56:09,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:56:08" (1/1) ... [2021-11-23 03:56:09,088 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:56:08" (1/1) ... [2021-11-23 03:56:09,088 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:56:08" (1/1) ... [2021-11-23 03:56:09,220 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:56:08" (1/1) ... [2021-11-23 03:56:09,249 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:56:08" (1/1) ... [2021-11-23 03:56:09,287 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:56:08" (1/1) ... [2021-11-23 03:56:09,408 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:56:09,409 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:56:09,409 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:56:09,409 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:56:09,410 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:56:08" (1/1) ... [2021-11-23 03:56:09,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:56:09,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:56:09,449 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:56:09,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:56:09,495 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab32 [2021-11-23 03:56:09,495 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab32 [2021-11-23 03:56:09,495 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_free_iso_urbs [2021-11-23 03:56:09,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_free_iso_urbs [2021-11-23 03:56:09,496 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2021-11-23 03:56:09,496 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2021-11-23 03:56:09,496 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 03:56:09,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 03:56:09,497 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_interface [2021-11-23 03:56:09,497 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_interface [2021-11-23 03:56:09,497 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_unregister_adapter [2021-11-23 03:56:09,497 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_unregister_adapter [2021-11-23 03:56:09,497 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 03:56:09,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 03:56:09,498 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_iso_mutex_of_ttusb_dec [2021-11-23 03:56:09,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_iso_mutex_of_ttusb_dec [2021-11-23 03:56:09,498 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_start_iso_xfer [2021-11-23 03:56:09,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_start_iso_xfer [2021-11-23 03:56:09,498 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-23 03:56:09,499 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-23 03:56:09,499 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-23 03:56:09,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-23 03:56:09,499 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_usb_mutex_of_ttusb_dec [2021-11-23 03:56:09,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_usb_mutex_of_ttusb_dec [2021-11-23 03:56:09,499 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_dmx_release [2021-11-23 03:56:09,500 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_dmx_release [2021-11-23 03:56:09,500 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-23 03:56:09,500 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-23 03:56:09,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 03:56:09,500 INFO L130 BoogieDeclarations]: Found specification of procedure input_event [2021-11-23 03:56:09,500 INFO L138 BoogieDeclarations]: Found implementation of procedure input_event [2021-11-23 03:56:09,501 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-23 03:56:09,501 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-23 03:56:09,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 03:56:09,501 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-23 03:56:09,501 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-23 03:56:09,501 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible [2021-11-23 03:56:09,502 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible [2021-11-23 03:56:09,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:56:09,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 03:56:09,502 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2021-11-23 03:56:09,502 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2021-11-23 03:56:09,502 INFO L130 BoogieDeclarations]: Found specification of procedure __mutex_init [2021-11-23 03:56:09,503 INFO L138 BoogieDeclarations]: Found implementation of procedure __mutex_init [2021-11-23 03:56:09,503 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-23 03:56:09,503 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-23 03:56:09,503 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-23 03:56:09,503 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-23 03:56:09,504 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2021-11-23 03:56:09,504 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2021-11-23 03:56:09,504 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-23 03:56:09,504 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-23 03:56:09,504 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2021-11-23 03:56:09,504 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2021-11-23 03:56:09,505 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_set_model [2021-11-23 03:56:09,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_set_model [2021-11-23 03:56:09,505 INFO L130 BoogieDeclarations]: Found specification of procedure release_firmware [2021-11-23 03:56:09,505 INFO L138 BoogieDeclarations]: Found implementation of procedure release_firmware [2021-11-23 03:56:09,505 INFO L130 BoogieDeclarations]: Found specification of procedure input_report_key [2021-11-23 03:56:09,505 INFO L138 BoogieDeclarations]: Found implementation of procedure input_report_key [2021-11-23 03:56:09,506 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_stop_iso_xfer [2021-11-23 03:56:09,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_stop_iso_xfer [2021-11-23 03:56:09,506 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2021-11-23 03:56:09,506 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2021-11-23 03:56:09,506 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_filter_pes2ts_init [2021-11-23 03:56:09,506 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_filter_pes2ts_init [2021-11-23 03:56:09,507 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 03:56:09,507 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-23 03:56:09,507 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-23 03:56:09,507 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-23 03:56:09,507 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-23 03:56:09,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 03:56:09,508 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~$Pointer$~X~int~X~$Pointer$~X~int~TO~int [2021-11-23 03:56:09,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~$Pointer$~X~int~X~$Pointer$~X~int~TO~int [2021-11-23 03:56:09,508 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2021-11-23 03:56:09,508 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2021-11-23 03:56:09,508 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:56:09,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-23 03:56:09,509 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-23 03:56:09,509 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-23 03:56:09,509 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-23 03:56:09,509 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-23 03:56:09,509 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-23 03:56:09,509 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-23 03:56:09,510 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-23 03:56:09,510 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2021-11-23 03:56:09,510 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2021-11-23 03:56:09,510 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_send_command [2021-11-23 03:56:09,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_send_command [2021-11-23 03:56:09,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:56:09,511 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_setup_urbs [2021-11-23 03:56:09,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_setup_urbs [2021-11-23 03:56:09,511 INFO L130 BoogieDeclarations]: Found specification of procedure input_sync [2021-11-23 03:56:09,511 INFO L138 BoogieDeclarations]: Found implementation of procedure input_sync [2021-11-23 03:56:09,511 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 03:56:09,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 03:56:09,512 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_set_pids [2021-11-23 03:56:09,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_set_pids [2021-11-23 03:56:09,512 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_exit_usb [2021-11-23 03:56:09,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_exit_usb [2021-11-23 03:56:09,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 03:56:09,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:56:09,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 03:56:09,513 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_interruptible_iso_mutex_of_ttusb_dec [2021-11-23 03:56:09,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_interruptible_iso_mutex_of_ttusb_dec [2021-11-23 03:56:09,513 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 03:56:09,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 03:56:09,513 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-11-23 03:56:09,514 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-11-23 03:56:09,514 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_dmxdev_release [2021-11-23 03:56:09,514 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_dmxdev_release [2021-11-23 03:56:09,514 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-23 03:56:09,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-23 03:56:09,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:56:09,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:56:09,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:56:10,457 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:56:10,461 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:56:16,660 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:56:17,572 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:56:17,572 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 03:56:17,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:56:17 BoogieIcfgContainer [2021-11-23 03:56:17,578 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:56:17,580 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:56:17,580 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:56:17,584 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:56:17,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:56:06" (1/3) ... [2021-11-23 03:56:17,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b46748 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:56:17, skipping insertion in model container [2021-11-23 03:56:17,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:56:08" (2/3) ... [2021-11-23 03:56:17,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b46748 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:56:17, skipping insertion in model container [2021-11-23 03:56:17,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:56:17" (3/3) ... [2021-11-23 03:56:17,588 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i [2021-11-23 03:56:17,594 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:56:17,595 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:56:17,660 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:56:17,668 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 03:56:17,669 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:56:17,711 INFO L276 IsEmpty]: Start isEmpty. Operand has 670 states, 414 states have (on average 1.3357487922705313) internal successors, (553), 434 states have internal predecessors, (553), 204 states have call successors, (204), 50 states have call predecessors, (204), 50 states have return successors, (204), 198 states have call predecessors, (204), 204 states have call successors, (204) [2021-11-23 03:56:17,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 03:56:17,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:56:17,718 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:56:17,719 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:56:17,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:56:17,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1219217795, now seen corresponding path program 1 times [2021-11-23 03:56:17,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:56:17,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325740273] [2021-11-23 03:56:17,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:56:17,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:56:18,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:56:18,220 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 03:56:18,221 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:56:18,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325740273] [2021-11-23 03:56:18,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325740273] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:56:18,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:56:18,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:56:18,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476866995] [2021-11-23 03:56:18,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:56:18,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:56:18,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:56:18,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:56:18,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:56:18,273 INFO L87 Difference]: Start difference. First operand has 670 states, 414 states have (on average 1.3357487922705313) internal successors, (553), 434 states have internal predecessors, (553), 204 states have call successors, (204), 50 states have call predecessors, (204), 50 states have return successors, (204), 198 states have call predecessors, (204), 204 states have call successors, (204) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:56:20,508 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:56:23,623 WARN L534 Checker$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 03:56:25,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:56:25,184 INFO L93 Difference]: Finished difference Result 1926 states and 2808 transitions. [2021-11-23 03:56:25,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:56:25,190 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 03:56:25,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:56:25,232 INFO L225 Difference]: With dead ends: 1926 [2021-11-23 03:56:25,232 INFO L226 Difference]: Without dead ends: 1253 [2021-11-23 03:56:25,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:56:25,251 INFO L933 BasicCegarLoop]: 988 mSDtfsCounter, 849 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 1767 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:56:25,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [849 Valid, 1767 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 310 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2021-11-23 03:56:25,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1253 states. [2021-11-23 03:56:25,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1253 to 1249. [2021-11-23 03:56:25,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 776 states have (on average 1.3260309278350515) internal successors, (1029), 805 states have internal predecessors, (1029), 376 states have call successors, (376), 98 states have call predecessors, (376), 96 states have return successors, (375), 355 states have call predecessors, (375), 368 states have call successors, (375) [2021-11-23 03:56:25,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 1780 transitions. [2021-11-23 03:56:25,508 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 1780 transitions. Word has length 7 [2021-11-23 03:56:25,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:56:25,509 INFO L470 AbstractCegarLoop]: Abstraction has 1249 states and 1780 transitions. [2021-11-23 03:56:25,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:56:25,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 1780 transitions. [2021-11-23 03:56:25,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 03:56:25,510 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:56:25,511 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:56:25,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:56:25,514 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:56:25,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:56:25,519 INFO L85 PathProgramCache]: Analyzing trace with hash -859360151, now seen corresponding path program 1 times [2021-11-23 03:56:25,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:56:25,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273478239] [2021-11-23 03:56:25,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:56:25,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:56:25,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:56:25,770 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 03:56:25,771 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:56:25,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273478239] [2021-11-23 03:56:25,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273478239] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:56:25,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:56:25,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:56:25,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48916248] [2021-11-23 03:56:25,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:56:25,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:56:25,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:56:25,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:56:25,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:56:25,781 INFO L87 Difference]: Start difference. First operand 1249 states and 1780 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:56:27,937 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:56:29,847 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:56:32,909 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 03:56:33,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:56:33,627 INFO L93 Difference]: Finished difference Result 2457 states and 3496 transitions. [2021-11-23 03:56:33,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:56:33,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-23 03:56:33,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:56:33,657 INFO L225 Difference]: With dead ends: 2457 [2021-11-23 03:56:33,657 INFO L226 Difference]: Without dead ends: 2454 [2021-11-23 03:56:33,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:56:33,660 INFO L933 BasicCegarLoop]: 985 mSDtfsCounter, 884 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 1776 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:56:33,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [884 Valid, 1776 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 300 Invalid, 2 Unknown, 0 Unchecked, 7.7s Time] [2021-11-23 03:56:33,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2454 states. [2021-11-23 03:56:33,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2454 to 2447. [2021-11-23 03:56:33,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2447 states, 1524 states have (on average 1.3267716535433072) internal successors, (2022), 1576 states have internal predecessors, (2022), 730 states have call successors, (730), 195 states have call predecessors, (730), 192 states have return successors, (735), 695 states have call predecessors, (735), 722 states have call successors, (735) [2021-11-23 03:56:33,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2447 states to 2447 states and 3487 transitions. [2021-11-23 03:56:33,825 INFO L78 Accepts]: Start accepts. Automaton has 2447 states and 3487 transitions. Word has length 8 [2021-11-23 03:56:33,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:56:33,826 INFO L470 AbstractCegarLoop]: Abstraction has 2447 states and 3487 transitions. [2021-11-23 03:56:33,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:56:33,826 INFO L276 IsEmpty]: Start isEmpty. Operand 2447 states and 3487 transitions. [2021-11-23 03:56:33,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 03:56:33,827 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:56:33,827 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:56:33,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:56:33,828 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:56:33,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:56:33,829 INFO L85 PathProgramCache]: Analyzing trace with hash -870762170, now seen corresponding path program 1 times [2021-11-23 03:56:33,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:56:33,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202204988] [2021-11-23 03:56:33,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:56:33,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:56:33,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:56:33,918 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 03:56:33,918 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:56:33,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202204988] [2021-11-23 03:56:33,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202204988] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:56:33,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:56:33,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:56:33,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892333641] [2021-11-23 03:56:33,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:56:33,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:56:33,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:56:33,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:56:33,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:56:33,921 INFO L87 Difference]: Start difference. First operand 2447 states and 3487 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:56:36,081 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 03:56:37,701 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:56:40,461 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:56:41,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:56:41,369 INFO L93 Difference]: Finished difference Result 2458 states and 3497 transitions. [2021-11-23 03:56:41,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:56:41,375 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-23 03:56:41,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:56:41,397 INFO L225 Difference]: With dead ends: 2458 [2021-11-23 03:56:41,397 INFO L226 Difference]: Without dead ends: 2455 [2021-11-23 03:56:41,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:56:41,400 INFO L933 BasicCegarLoop]: 985 mSDtfsCounter, 881 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 881 SdHoareTripleChecker+Valid, 1779 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:56:41,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [881 Valid, 1779 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 301 Invalid, 1 Unknown, 0 Unchecked, 7.2s Time] [2021-11-23 03:56:41,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2021-11-23 03:56:41,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 2448. [2021-11-23 03:56:41,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2448 states, 1525 states have (on average 1.3265573770491803) internal successors, (2023), 1577 states have internal predecessors, (2023), 730 states have call successors, (730), 195 states have call predecessors, (730), 192 states have return successors, (735), 695 states have call predecessors, (735), 722 states have call successors, (735) [2021-11-23 03:56:41,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2448 states to 2448 states and 3488 transitions. [2021-11-23 03:56:41,565 INFO L78 Accepts]: Start accepts. Automaton has 2448 states and 3488 transitions. Word has length 9 [2021-11-23 03:56:41,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:56:41,565 INFO L470 AbstractCegarLoop]: Abstraction has 2448 states and 3488 transitions. [2021-11-23 03:56:41,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:56:41,566 INFO L276 IsEmpty]: Start isEmpty. Operand 2448 states and 3488 transitions. [2021-11-23 03:56:41,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 03:56:41,567 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:56:41,567 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:56:41,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 03:56:41,568 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:56:41,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:56:41,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1224219892, now seen corresponding path program 1 times [2021-11-23 03:56:41,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:56:41,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497458101] [2021-11-23 03:56:41,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:56:41,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:56:41,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:56:41,671 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 03:56:41,671 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:56:41,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497458101] [2021-11-23 03:56:41,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497458101] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:56:41,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:56:41,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:56:41,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641459438] [2021-11-23 03:56:41,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:56:41,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:56:41,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:56:41,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:56:41,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:56:41,675 INFO L87 Difference]: Start difference. First operand 2448 states and 3488 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:56:43,835 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:56:46,567 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:56:49,359 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 03:56:49,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:56:49,696 INFO L93 Difference]: Finished difference Result 4700 states and 6775 transitions. [2021-11-23 03:56:49,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:56:49,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-23 03:56:49,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:56:49,746 INFO L225 Difference]: With dead ends: 4700 [2021-11-23 03:56:49,747 INFO L226 Difference]: Without dead ends: 4691 [2021-11-23 03:56:49,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:56:49,752 INFO L933 BasicCegarLoop]: 1049 mSDtfsCounter, 872 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 872 SdHoareTripleChecker+Valid, 1833 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:56:49,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [872 Valid, 1833 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 317 Invalid, 2 Unknown, 0 Unchecked, 7.8s Time] [2021-11-23 03:56:49,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4691 states. [2021-11-23 03:56:50,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4691 to 4684. [2021-11-23 03:56:50,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4684 states, 2917 states have (on average 1.3239629756599245) internal successors, (3862), 3013 states have internal predecessors, (3862), 1388 states have call successors, (1388), 383 states have call predecessors, (1388), 378 states have return successors, (1503), 1327 states have call predecessors, (1503), 1380 states have call successors, (1503) [2021-11-23 03:56:50,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4684 states to 4684 states and 6753 transitions. [2021-11-23 03:56:50,133 INFO L78 Accepts]: Start accepts. Automaton has 4684 states and 6753 transitions. Word has length 10 [2021-11-23 03:56:50,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:56:50,134 INFO L470 AbstractCegarLoop]: Abstraction has 4684 states and 6753 transitions. [2021-11-23 03:56:50,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:56:50,134 INFO L276 IsEmpty]: Start isEmpty. Operand 4684 states and 6753 transitions. [2021-11-23 03:56:50,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-23 03:56:50,153 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:56:50,153 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:56:50,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 03:56:50,154 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:56:50,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:56:50,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1628095722, now seen corresponding path program 1 times [2021-11-23 03:56:50,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:56:50,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876331737] [2021-11-23 03:56:50,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:56:50,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:56:50,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:56:50,428 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 03:56:50,428 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:56:50,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876331737] [2021-11-23 03:56:50,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876331737] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:56:50,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:56:50,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:56:50,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346177058] [2021-11-23 03:56:50,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:56:50,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:56:50,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:56:50,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:56:50,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:56:50,431 INFO L87 Difference]: Start difference. First operand 4684 states and 6753 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-23 03:56:52,672 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 03:56:56,020 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:56:56,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:56:56,462 INFO L93 Difference]: Finished difference Result 9415 states and 13592 transitions. [2021-11-23 03:56:56,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:56:56,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 84 [2021-11-23 03:56:56,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:56:56,516 INFO L225 Difference]: With dead ends: 9415 [2021-11-23 03:56:56,517 INFO L226 Difference]: Without dead ends: 4732 [2021-11-23 03:56:56,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:56:56,549 INFO L933 BasicCegarLoop]: 795 mSDtfsCounter, 230 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 1318 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:56:56,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 1318 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 263 Invalid, 1 Unknown, 0 Unchecked, 5.7s Time] [2021-11-23 03:56:56,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4732 states. [2021-11-23 03:56:56,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4732 to 4732. [2021-11-23 03:56:56,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4732 states, 2965 states have (on average 1.3264755480607082) internal successors, (3933), 3061 states have internal predecessors, (3933), 1388 states have call successors, (1388), 383 states have call predecessors, (1388), 378 states have return successors, (1503), 1327 states have call predecessors, (1503), 1380 states have call successors, (1503) [2021-11-23 03:56:56,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4732 states to 4732 states and 6824 transitions. [2021-11-23 03:56:56,944 INFO L78 Accepts]: Start accepts. Automaton has 4732 states and 6824 transitions. Word has length 84 [2021-11-23 03:56:56,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:56:56,945 INFO L470 AbstractCegarLoop]: Abstraction has 4732 states and 6824 transitions. [2021-11-23 03:56:56,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-23 03:56:56,949 INFO L276 IsEmpty]: Start isEmpty. Operand 4732 states and 6824 transitions. [2021-11-23 03:56:56,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-23 03:56:56,952 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:56:56,953 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:56:56,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 03:56:56,954 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:56:56,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:56:56,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1504465683, now seen corresponding path program 1 times [2021-11-23 03:56:56,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:56:56,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649433189] [2021-11-23 03:56:56,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:56:56,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:56:57,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:56:57,337 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 03:56:57,337 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:56:57,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649433189] [2021-11-23 03:56:57,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649433189] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:56:57,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:56:57,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:56:57,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79512798] [2021-11-23 03:56:57,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:56:57,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:56:57,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:56:57,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:56:57,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:56:57,341 INFO L87 Difference]: Start difference. First operand 4732 states and 6824 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-23 03:56:59,490 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 03:57:03,782 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 03:57:04,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:57:04,209 INFO L93 Difference]: Finished difference Result 11580 states and 16659 transitions. [2021-11-23 03:57:04,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:57:04,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 88 [2021-11-23 03:57:04,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:57:04,276 INFO L225 Difference]: With dead ends: 11580 [2021-11-23 03:57:04,276 INFO L226 Difference]: Without dead ends: 6849 [2021-11-23 03:57:04,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:57:04,306 INFO L933 BasicCegarLoop]: 981 mSDtfsCounter, 824 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 1775 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:57:04,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [824 Valid, 1775 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 301 Invalid, 2 Unknown, 0 Unchecked, 6.6s Time] [2021-11-23 03:57:04,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6849 states. [2021-11-23 03:57:04,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6849 to 6826. [2021-11-23 03:57:04,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6826 states, 4264 states have (on average 1.3194183864915572) internal successors, (5626), 4406 states have internal predecessors, (5626), 1996 states have call successors, (1996), 572 states have call predecessors, (1996), 565 states have return successors, (2163), 1907 states have call predecessors, (2163), 1988 states have call successors, (2163) [2021-11-23 03:57:04,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6826 states to 6826 states and 9785 transitions. [2021-11-23 03:57:04,744 INFO L78 Accepts]: Start accepts. Automaton has 6826 states and 9785 transitions. Word has length 88 [2021-11-23 03:57:04,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:57:04,747 INFO L470 AbstractCegarLoop]: Abstraction has 6826 states and 9785 transitions. [2021-11-23 03:57:04,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-23 03:57:04,748 INFO L276 IsEmpty]: Start isEmpty. Operand 6826 states and 9785 transitions. [2021-11-23 03:57:04,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-23 03:57:04,754 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:57:04,754 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:57:04,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 03:57:04,755 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:57:04,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:57:04,755 INFO L85 PathProgramCache]: Analyzing trace with hash -735956694, now seen corresponding path program 1 times [2021-11-23 03:57:04,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:57:04,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025881979] [2021-11-23 03:57:04,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:57:04,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:57:04,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:57:05,151 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 03:57:05,151 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:57:05,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025881979] [2021-11-23 03:57:05,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025881979] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:57:05,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:57:05,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:57:05,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759570666] [2021-11-23 03:57:05,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:57:05,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:57:05,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:57:05,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:57:05,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:57:05,155 INFO L87 Difference]: Start difference. First operand 6826 states and 9785 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 3 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 03:57:07,365 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 03:57:10,489 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:57:11,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:57:11,477 INFO L93 Difference]: Finished difference Result 6876 states and 9879 transitions. [2021-11-23 03:57:11,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:57:11,478 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), 3 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 99 [2021-11-23 03:57:11,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:57:11,548 INFO L225 Difference]: With dead ends: 6876 [2021-11-23 03:57:11,548 INFO L226 Difference]: Without dead ends: 6873 [2021-11-23 03:57:11,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:57:11,556 INFO L933 BasicCegarLoop]: 807 mSDtfsCounter, 71 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1560 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:57:11,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 1560 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 319 Invalid, 1 Unknown, 0 Unchecked, 6.1s Time] [2021-11-23 03:57:11,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6873 states. [2021-11-23 03:57:11,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6873 to 6873. [2021-11-23 03:57:11,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6873 states, 4294 states have (on average 1.3185840707964602) internal successors, (5662), 4441 states have internal predecessors, (5662), 1995 states have call successors, (1995), 584 states have call predecessors, (1995), 583 states have return successors, (2214), 1907 states have call predecessors, (2214), 1988 states have call successors, (2214) [2021-11-23 03:57:11,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6873 states to 6873 states and 9871 transitions. [2021-11-23 03:57:11,972 INFO L78 Accepts]: Start accepts. Automaton has 6873 states and 9871 transitions. Word has length 99 [2021-11-23 03:57:11,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:57:11,973 INFO L470 AbstractCegarLoop]: Abstraction has 6873 states and 9871 transitions. [2021-11-23 03:57:11,973 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), 3 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 03:57:11,973 INFO L276 IsEmpty]: Start isEmpty. Operand 6873 states and 9871 transitions. [2021-11-23 03:57:11,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-23 03:57:11,983 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:57:11,983 INFO L514 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:57:11,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 03:57:11,983 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:57:11,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:57:11,985 INFO L85 PathProgramCache]: Analyzing trace with hash 552912667, now seen corresponding path program 1 times [2021-11-23 03:57:11,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:57:11,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580365740] [2021-11-23 03:57:11,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:57:11,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:57:12,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:57:12,191 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 03:57:12,191 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:57:12,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580365740] [2021-11-23 03:57:12,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580365740] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:57:12,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:57:12,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:57:12,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345559817] [2021-11-23 03:57:12,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:57:12,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:57:12,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:57:12,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:57:12,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:57:12,194 INFO L87 Difference]: Start difference. First operand 6873 states and 9871 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-23 03:57:16,463 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 03:57:18,890 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 03:57:19,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:57:19,057 INFO L93 Difference]: Finished difference Result 13819 states and 19838 transitions. [2021-11-23 03:57:19,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:57:19,057 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), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 106 [2021-11-23 03:57:19,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:57:19,191 INFO L225 Difference]: With dead ends: 13819 [2021-11-23 03:57:19,195 INFO L226 Difference]: Without dead ends: 6945 [2021-11-23 03:57:19,225 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 03:57:19,227 INFO L933 BasicCegarLoop]: 808 mSDtfsCounter, 21 mSDsluCounter, 1889 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 2405 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:57:19,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 2405 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 449 Invalid, 2 Unknown, 0 Unchecked, 6.6s Time] [2021-11-23 03:57:19,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6945 states. [2021-11-23 03:57:19,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6945 to 6887. [2021-11-23 03:57:19,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6887 states, 4308 states have (on average 1.3173166202414113) internal successors, (5675), 4455 states have internal predecessors, (5675), 1995 states have call successors, (1995), 584 states have call predecessors, (1995), 583 states have return successors, (2214), 1907 states have call predecessors, (2214), 1988 states have call successors, (2214) [2021-11-23 03:57:19,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6887 states to 6887 states and 9884 transitions. [2021-11-23 03:57:19,555 INFO L78 Accepts]: Start accepts. Automaton has 6887 states and 9884 transitions. Word has length 106 [2021-11-23 03:57:19,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:57:19,557 INFO L470 AbstractCegarLoop]: Abstraction has 6887 states and 9884 transitions. [2021-11-23 03:57:19,557 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), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-23 03:57:19,558 INFO L276 IsEmpty]: Start isEmpty. Operand 6887 states and 9884 transitions. [2021-11-23 03:57:19,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-23 03:57:19,563 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:57:19,564 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:57:19,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 03:57:19,564 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:57:19,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:57:19,565 INFO L85 PathProgramCache]: Analyzing trace with hash 531118459, now seen corresponding path program 1 times [2021-11-23 03:57:19,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:57:19,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793495259] [2021-11-23 03:57:19,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:57:19,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:57:19,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:57:19,801 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-23 03:57:19,801 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:57:19,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793495259] [2021-11-23 03:57:19,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793495259] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:57:19,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:57:19,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:57:19,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574349256] [2021-11-23 03:57:19,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:57:19,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:57:19,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:57:19,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:57:19,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:57:19,805 INFO L87 Difference]: Start difference. First operand 6887 states and 9884 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-23 03:57:23,505 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 03:57:25,792 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 03:57:25,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:57:25,941 INFO L93 Difference]: Finished difference Result 13809 states and 19851 transitions. [2021-11-23 03:57:25,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:57:25,942 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 156 [2021-11-23 03:57:25,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:57:25,981 INFO L225 Difference]: With dead ends: 13809 [2021-11-23 03:57:25,982 INFO L226 Difference]: Without dead ends: 6923 [2021-11-23 03:57:26,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:57:26,018 INFO L933 BasicCegarLoop]: 796 mSDtfsCounter, 1 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1590 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-11-23 03:57:26,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1590 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 298 Invalid, 2 Unknown, 0 Unchecked, 5.9s Time] [2021-11-23 03:57:26,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6923 states. [2021-11-23 03:57:26,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6923 to 6899. [2021-11-23 03:57:26,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6899 states, 4320 states have (on average 1.3164351851851852) internal successors, (5687), 4467 states have internal predecessors, (5687), 1995 states have call successors, (1995), 584 states have call predecessors, (1995), 583 states have return successors, (2214), 1907 states have call predecessors, (2214), 1988 states have call successors, (2214) [2021-11-23 03:57:26,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6899 states to 6899 states and 9896 transitions. [2021-11-23 03:57:26,513 INFO L78 Accepts]: Start accepts. Automaton has 6899 states and 9896 transitions. Word has length 156 [2021-11-23 03:57:26,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:57:26,514 INFO L470 AbstractCegarLoop]: Abstraction has 6899 states and 9896 transitions. [2021-11-23 03:57:26,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-23 03:57:26,514 INFO L276 IsEmpty]: Start isEmpty. Operand 6899 states and 9896 transitions. [2021-11-23 03:57:26,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-23 03:57:26,522 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:57:26,522 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:57:26,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 03:57:26,523 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:57:26,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:57:26,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1522226009, now seen corresponding path program 1 times [2021-11-23 03:57:26,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:57:26,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347068951] [2021-11-23 03:57:26,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:57:26,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:57:26,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:57:26,782 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-23 03:57:26,782 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:57:26,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347068951] [2021-11-23 03:57:26,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347068951] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:57:26,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95846946] [2021-11-23 03:57:26,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:57:26,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:57:26,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:57:26,788 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:57:26,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:57:27,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:57:27,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 2229 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 03:57:27,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:57:27,956 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-23 03:57:27,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:57:27,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95846946] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:57:27,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:57:27,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-23 03:57:27,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271051010] [2021-11-23 03:57:27,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:57:27,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:57:27,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:57:27,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:57:27,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:57:27,958 INFO L87 Difference]: Start difference. First operand 6899 states and 9896 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-23 03:57:31,691 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 03:57:33,999 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:57:34,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:57:34,137 INFO L93 Difference]: Finished difference Result 13833 states and 19897 transitions. [2021-11-23 03:57:34,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:57:34,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 161 [2021-11-23 03:57:34,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:57:34,179 INFO L225 Difference]: With dead ends: 13833 [2021-11-23 03:57:34,179 INFO L226 Difference]: Without dead ends: 6935 [2021-11-23 03:57:34,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:57:34,208 INFO L933 BasicCegarLoop]: 796 mSDtfsCounter, 1 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1591 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:57:34,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1591 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 297 Invalid, 2 Unknown, 0 Unchecked, 6.0s Time] [2021-11-23 03:57:34,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6935 states. [2021-11-23 03:57:34,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6935 to 6911. [2021-11-23 03:57:34,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6911 states, 4332 states have (on average 1.3155586334256695) internal successors, (5699), 4479 states have internal predecessors, (5699), 1995 states have call successors, (1995), 584 states have call predecessors, (1995), 583 states have return successors, (2214), 1907 states have call predecessors, (2214), 1988 states have call successors, (2214) [2021-11-23 03:57:34,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6911 states to 6911 states and 9908 transitions. [2021-11-23 03:57:34,618 INFO L78 Accepts]: Start accepts. Automaton has 6911 states and 9908 transitions. Word has length 161 [2021-11-23 03:57:34,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:57:34,619 INFO L470 AbstractCegarLoop]: Abstraction has 6911 states and 9908 transitions. [2021-11-23 03:57:34,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-23 03:57:34,620 INFO L276 IsEmpty]: Start isEmpty. Operand 6911 states and 9908 transitions. [2021-11-23 03:57:34,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-23 03:57:34,626 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:57:34,626 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:57:34,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:57:34,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:57:34,851 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:57:34,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:57:34,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1955449651, now seen corresponding path program 1 times [2021-11-23 03:57:34,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:57:34,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137933097] [2021-11-23 03:57:34,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:57:34,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:57:34,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:57:35,170 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-23 03:57:35,170 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:57:35,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137933097] [2021-11-23 03:57:35,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137933097] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:57:35,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:57:35,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-23 03:57:35,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744674582] [2021-11-23 03:57:35,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:57:35,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 03:57:35,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:57:35,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 03:57:35,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-23 03:57:35,173 INFO L87 Difference]: Start difference. First operand 6911 states and 9908 transitions. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 9 states have internal predecessors, (79), 3 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-23 03:57:43,080 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 03:57:45,591 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:57:47,424 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:57:48,734 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:57:50,756 WARN L534 Checker$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 03:57:53,658 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:57:55,686 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:57:57,814 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:58:00,778 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:58:02,696 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:58:04,781 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:58:06,811 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:58:08,852 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:58:10,879 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:58:12,911 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:58:14,941 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:58:15,978 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:58:18,861 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:58:20,153 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:58:20,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:58:20,371 INFO L93 Difference]: Finished difference Result 23612 states and 37266 transitions. [2021-11-23 03:58:20,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 03:58:20,372 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 9 states have internal predecessors, (79), 3 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) Word has length 141 [2021-11-23 03:58:20,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:58:20,475 INFO L225 Difference]: With dead ends: 23612 [2021-11-23 03:58:20,475 INFO L226 Difference]: Without dead ends: 16702 [2021-11-23 03:58:20,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-11-23 03:58:20,506 INFO L933 BasicCegarLoop]: 1248 mSDtfsCounter, 1971 mSDsluCounter, 10895 mSDsCounter, 0 mSdLazyCounter, 1836 mSolverCounterSat, 937 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2061 SdHoareTripleChecker+Valid, 10564 SdHoareTripleChecker+Invalid, 2783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 937 IncrementalHoareTripleChecker+Valid, 1836 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:58:20,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2061 Valid, 10564 Invalid, 2783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [937 Valid, 1836 Invalid, 10 Unknown, 0 Unchecked, 44.2s Time] [2021-11-23 03:58:20,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16702 states. [2021-11-23 03:58:21,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16702 to 6125. [2021-11-23 03:58:21,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6125 states, 3852 states have (on average 1.2972481827622016) internal successors, (4997), 3975 states have internal predecessors, (4997), 1695 states have call successors, (1695), 566 states have call predecessors, (1695), 577 states have return successors, (2029), 1637 states have call predecessors, (2029), 1688 states have call successors, (2029) [2021-11-23 03:58:21,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6125 states to 6125 states and 8721 transitions. [2021-11-23 03:58:21,851 INFO L78 Accepts]: Start accepts. Automaton has 6125 states and 8721 transitions. Word has length 141 [2021-11-23 03:58:21,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:58:21,868 INFO L470 AbstractCegarLoop]: Abstraction has 6125 states and 8721 transitions. [2021-11-23 03:58:21,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 9 states have internal predecessors, (79), 3 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-23 03:58:21,868 INFO L276 IsEmpty]: Start isEmpty. Operand 6125 states and 8721 transitions. [2021-11-23 03:58:21,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-23 03:58:21,872 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:58:21,873 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:58:21,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 03:58:21,873 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:58:21,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:58:21,874 INFO L85 PathProgramCache]: Analyzing trace with hash -136275018, now seen corresponding path program 1 times [2021-11-23 03:58:21,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:58:21,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523932012] [2021-11-23 03:58:21,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:58:21,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:58:22,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:58:22,338 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-23 03:58:22,339 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:58:22,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523932012] [2021-11-23 03:58:22,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523932012] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:58:22,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9614602] [2021-11-23 03:58:22,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:58:22,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:58:22,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:58:22,343 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:58:22,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:58:23,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:58:23,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 2247 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:58:23,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:58:23,536 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-23 03:58:23,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:58:24,042 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-23 03:58:24,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9614602] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:58:24,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1549986337] [2021-11-23 03:58:24,080 INFO L159 IcfgInterpreter]: Started Sifa with 130 locations of interest [2021-11-23 03:58:24,080 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:58:24,087 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:58:24,094 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:58:24,095 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:58:30,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:58:30,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-23 03:58:35,014 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: not yet implemented, we need term in nnf at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PrenexNormalForm.convertApplicationTerm(PrenexNormalForm.java:89) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$BuildApplicationTerm.walk(TermTransformer.java:339) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:109) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:903) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:865) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:783) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:162) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:243) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:233) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:119) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpretForSingleMarker(DagInterpreter.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.computeTopSummary(TopInputCallSummarizer.java:85) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.summarize(TopInputCallSummarizer.java:71) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:220) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:207) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 03:58:35,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:58:35,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-23 03:58:35,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598163818] [2021-11-23 03:58:35,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:58:35,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:58:35,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:58:35,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:58:35,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:58:35,020 INFO L87 Difference]: Start difference. First operand 6125 states and 8721 transitions. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 5 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (42), 5 states have call predecessors, (42), 5 states have call successors, (42) [2021-11-23 03:58:39,930 WARN L534 Checker$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 03:58:42,389 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 03:58:42,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:58:42,596 INFO L93 Difference]: Finished difference Result 12357 states and 17645 transitions. [2021-11-23 03:58:42,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:58:42,597 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 5 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (42), 5 states have call predecessors, (42), 5 states have call successors, (42) Word has length 166 [2021-11-23 03:58:42,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:58:42,631 INFO L225 Difference]: With dead ends: 12357 [2021-11-23 03:58:42,631 INFO L226 Difference]: Without dead ends: 6233 [2021-11-23 03:58:42,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:58:42,661 INFO L933 BasicCegarLoop]: 798 mSDtfsCounter, 4 mSDsluCounter, 2817 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 3177 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:58:42,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 3177 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 606 Invalid, 2 Unknown, 0 Unchecked, 7.3s Time] [2021-11-23 03:58:42,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6233 states. [2021-11-23 03:58:43,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6233 to 6233. [2021-11-23 03:58:43,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6233 states, 3924 states have (on average 1.2917940876656473) internal successors, (5069), 4047 states have internal predecessors, (5069), 1731 states have call successors, (1731), 566 states have call predecessors, (1731), 577 states have return successors, (2065), 1673 states have call predecessors, (2065), 1724 states have call successors, (2065) [2021-11-23 03:58:43,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6233 states to 6233 states and 8865 transitions. [2021-11-23 03:58:43,077 INFO L78 Accepts]: Start accepts. Automaton has 6233 states and 8865 transitions. Word has length 166 [2021-11-23 03:58:43,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:58:43,078 INFO L470 AbstractCegarLoop]: Abstraction has 6233 states and 8865 transitions. [2021-11-23 03:58:43,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 5 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (42), 5 states have call predecessors, (42), 5 states have call successors, (42) [2021-11-23 03:58:43,079 INFO L276 IsEmpty]: Start isEmpty. Operand 6233 states and 8865 transitions. [2021-11-23 03:58:43,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-23 03:58:43,083 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:58:43,084 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:58:43,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:58:43,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-23 03:58:43,299 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:58:43,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:58:43,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1491631202, now seen corresponding path program 2 times [2021-11-23 03:58:43,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:58:43,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374963380] [2021-11-23 03:58:43,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:58:43,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:58:43,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:58:43,543 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-23 03:58:43,543 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:58:43,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374963380] [2021-11-23 03:58:43,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374963380] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:58:43,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694104386] [2021-11-23 03:58:43,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:58:43,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:58:43,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:58:43,546 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:58:43,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:58:44,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-23 03:58:44,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:58:44,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 1121 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 03:58:44,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:58:44,534 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-23 03:58:44,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:58:44,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694104386] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:58:44,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:58:44,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4] total 8 [2021-11-23 03:58:44,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667174092] [2021-11-23 03:58:44,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:58:44,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:58:44,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:58:44,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:58:44,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:58:44,537 INFO L87 Difference]: Start difference. First operand 6233 states and 8865 transitions. Second operand has 6 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 2 states have call predecessors, (28), 1 states have call successors, (28) [2021-11-23 03:58:49,852 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 03:58:52,661 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 03:58:52,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:58:52,882 INFO L93 Difference]: Finished difference Result 6260 states and 8891 transitions. [2021-11-23 03:58:52,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:58:52,882 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 2 states have call predecessors, (28), 1 states have call successors, (28) Word has length 181 [2021-11-23 03:58:52,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:58:52,908 INFO L225 Difference]: With dead ends: 6260 [2021-11-23 03:58:52,908 INFO L226 Difference]: Without dead ends: 6257 [2021-11-23 03:58:52,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:58:52,913 INFO L933 BasicCegarLoop]: 792 mSDtfsCounter, 16 mSDsluCounter, 3688 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 3905 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:58:52,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 3905 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 796 Invalid, 2 Unknown, 0 Unchecked, 8.1s Time] [2021-11-23 03:58:52,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6257 states. [2021-11-23 03:58:53,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6257 to 6257. [2021-11-23 03:58:53,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6257 states, 3942 states have (on average 1.2904616945712837) internal successors, (5087), 4059 states have internal predecessors, (5087), 1731 states have call successors, (1731), 578 states have call predecessors, (1731), 583 states have return successors, (2065), 1673 states have call predecessors, (2065), 1724 states have call successors, (2065) [2021-11-23 03:58:53,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6257 states to 6257 states and 8883 transitions. [2021-11-23 03:58:53,293 INFO L78 Accepts]: Start accepts. Automaton has 6257 states and 8883 transitions. Word has length 181 [2021-11-23 03:58:53,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:58:53,296 INFO L470 AbstractCegarLoop]: Abstraction has 6257 states and 8883 transitions. [2021-11-23 03:58:53,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 2 states have call predecessors, (28), 1 states have call successors, (28) [2021-11-23 03:58:53,297 INFO L276 IsEmpty]: Start isEmpty. Operand 6257 states and 8883 transitions. [2021-11-23 03:58:53,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-23 03:58:53,302 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:58:53,304 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:58:53,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:58:53,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-23 03:58:53,528 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:58:53,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:58:53,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1302593181, now seen corresponding path program 1 times [2021-11-23 03:58:53,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:58:53,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352851739] [2021-11-23 03:58:53,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:58:53,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:58:53,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:58:53,790 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-23 03:58:53,790 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:58:53,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352851739] [2021-11-23 03:58:53,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352851739] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:58:53,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244671600] [2021-11-23 03:58:53,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:58:53,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:58:53,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:58:53,795 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:58:53,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:58:54,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:58:54,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 2142 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:58:54,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:58:54,814 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-23 03:58:54,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:58:54,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244671600] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:58:54,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:58:54,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-23 03:58:54,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277935005] [2021-11-23 03:58:54,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:58:54,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:58:54,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:58:54,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:58:54,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:58:54,818 INFO L87 Difference]: Start difference. First operand 6257 states and 8883 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-23 03:58:59,591 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 03:59:02,885 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:59:04,774 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:59:08,808 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:59:10,838 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:59:11,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:59:11,055 INFO L93 Difference]: Finished difference Result 14316 states and 20962 transitions. [2021-11-23 03:59:11,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:59:11,056 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 163 [2021-11-23 03:59:11,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:59:11,103 INFO L225 Difference]: With dead ends: 14316 [2021-11-23 03:59:11,104 INFO L226 Difference]: Without dead ends: 8060 [2021-11-23 03:59:11,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-23 03:59:11,128 INFO L933 BasicCegarLoop]: 945 mSDtfsCounter, 501 mSDsluCounter, 3107 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 158 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 3568 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:59:11,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [516 Valid, 3568 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 669 Invalid, 2 Unknown, 0 Unchecked, 15.7s Time] [2021-11-23 03:59:11,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8060 states. [2021-11-23 03:59:11,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8060 to 6018. [2021-11-23 03:59:11,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6018 states, 3793 states have (on average 1.2857896124439758) internal successors, (4877), 3909 states have internal predecessors, (4877), 1651 states have call successors, (1651), 569 states have call predecessors, (1651), 573 states have return successors, (1953), 1592 states have call predecessors, (1953), 1644 states have call successors, (1953) [2021-11-23 03:59:11,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6018 states to 6018 states and 8481 transitions. [2021-11-23 03:59:11,643 INFO L78 Accepts]: Start accepts. Automaton has 6018 states and 8481 transitions. Word has length 163 [2021-11-23 03:59:11,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:59:11,644 INFO L470 AbstractCegarLoop]: Abstraction has 6018 states and 8481 transitions. [2021-11-23 03:59:11,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-23 03:59:11,644 INFO L276 IsEmpty]: Start isEmpty. Operand 6018 states and 8481 transitions. [2021-11-23 03:59:11,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-23 03:59:11,650 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:59:11,650 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:59:11,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:59:11,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:59:11,875 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:59:11,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:59:11,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1617528555, now seen corresponding path program 1 times [2021-11-23 03:59:11,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:59:11,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727467091] [2021-11-23 03:59:11,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:59:11,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:59:11,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:59:12,059 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-23 03:59:12,059 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:59:12,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727467091] [2021-11-23 03:59:12,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727467091] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:59:12,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:59:12,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:59:12,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663274986] [2021-11-23 03:59:12,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:59:12,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:59:12,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:59:12,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:59:12,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:59:12,062 INFO L87 Difference]: Start difference. First operand 6018 states and 8481 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-23 03:59:16,194 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:59:18,750 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:59:19,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:59:19,993 INFO L93 Difference]: Finished difference Result 13530 states and 19552 transitions. [2021-11-23 03:59:19,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:59:19,994 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 170 [2021-11-23 03:59:19,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:59:20,039 INFO L225 Difference]: With dead ends: 13530 [2021-11-23 03:59:20,040 INFO L226 Difference]: Without dead ends: 7513 [2021-11-23 03:59:20,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:59:20,064 INFO L933 BasicCegarLoop]: 966 mSDtfsCounter, 119 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1807 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:59:20,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 1807 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 341 Invalid, 1 Unknown, 0 Unchecked, 7.5s Time] [2021-11-23 03:59:20,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7513 states. [2021-11-23 03:59:20,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7513 to 6028. [2021-11-23 03:59:20,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6028 states, 3803 states have (on average 1.285038127793847) internal successors, (4887), 3919 states have internal predecessors, (4887), 1651 states have call successors, (1651), 569 states have call predecessors, (1651), 573 states have return successors, (1953), 1592 states have call predecessors, (1953), 1644 states have call successors, (1953) [2021-11-23 03:59:20,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6028 states to 6028 states and 8491 transitions. [2021-11-23 03:59:20,569 INFO L78 Accepts]: Start accepts. Automaton has 6028 states and 8491 transitions. Word has length 170 [2021-11-23 03:59:20,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:59:20,570 INFO L470 AbstractCegarLoop]: Abstraction has 6028 states and 8491 transitions. [2021-11-23 03:59:20,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-23 03:59:20,570 INFO L276 IsEmpty]: Start isEmpty. Operand 6028 states and 8491 transitions. [2021-11-23 03:59:20,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-23 03:59:20,576 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:59:20,576 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:59:20,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 03:59:20,577 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:59:20,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:59:20,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1149427253, now seen corresponding path program 1 times [2021-11-23 03:59:20,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:59:20,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888215510] [2021-11-23 03:59:20,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:59:20,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:59:20,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:59:20,792 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-23 03:59:20,792 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:59:20,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888215510] [2021-11-23 03:59:20,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888215510] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:59:20,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672934468] [2021-11-23 03:59:20,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:59:20,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:59:20,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:59:20,795 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:59:20,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:59:21,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:59:21,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 2338 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 03:59:21,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:59:21,854 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-23 03:59:21,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:59:21,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672934468] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:59:21,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:59:21,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-23 03:59:21,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59898165] [2021-11-23 03:59:21,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:59:21,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:59:21,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:59:21,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:59:21,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:59:21,857 INFO L87 Difference]: Start difference. First operand 6028 states and 8491 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-23 03:59:25,471 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:59:28,755 WARN L534 Checker$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 03:59:31,473 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:59:31,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:59:31,664 INFO L93 Difference]: Finished difference Result 14350 states and 20750 transitions. [2021-11-23 03:59:31,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:59:31,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 189 [2021-11-23 03:59:31,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:59:31,714 INFO L225 Difference]: With dead ends: 14350 [2021-11-23 03:59:31,715 INFO L226 Difference]: Without dead ends: 8323 [2021-11-23 03:59:31,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:59:31,740 INFO L933 BasicCegarLoop]: 1223 mSDtfsCounter, 277 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 5 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 2112 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:59:31,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 2112 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 351 Invalid, 3 Unknown, 0 Unchecked, 9.3s Time] [2021-11-23 03:59:31,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8323 states. [2021-11-23 03:59:32,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8323 to 6028. [2021-11-23 03:59:32,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6028 states, 3803 states have (on average 1.2818827241651327) internal successors, (4875), 3907 states have internal predecessors, (4875), 1651 states have call successors, (1651), 569 states have call predecessors, (1651), 573 states have return successors, (1953), 1592 states have call predecessors, (1953), 1644 states have call successors, (1953) [2021-11-23 03:59:32,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6028 states to 6028 states and 8479 transitions. [2021-11-23 03:59:32,253 INFO L78 Accepts]: Start accepts. Automaton has 6028 states and 8479 transitions. Word has length 189 [2021-11-23 03:59:32,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:59:32,254 INFO L470 AbstractCegarLoop]: Abstraction has 6028 states and 8479 transitions. [2021-11-23 03:59:32,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-23 03:59:32,255 INFO L276 IsEmpty]: Start isEmpty. Operand 6028 states and 8479 transitions. [2021-11-23 03:59:32,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-23 03:59:32,260 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:59:32,261 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:59:32,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:59:32,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-23 03:59:32,475 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:59:32,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:59:32,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1940123496, now seen corresponding path program 1 times [2021-11-23 03:59:32,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:59:32,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667733925] [2021-11-23 03:59:32,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:59:32,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:59:32,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:59:32,762 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-23 03:59:32,762 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:59:32,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667733925] [2021-11-23 03:59:32,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667733925] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:59:32,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027145295] [2021-11-23 03:59:32,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:59:32,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:59:32,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:59:32,767 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:59:32,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 03:59:33,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:59:33,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 2229 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 03:59:33,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:59:33,828 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-23 03:59:33,828 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:59:33,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027145295] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:59:33,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:59:33,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-23 03:59:33,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710392662] [2021-11-23 03:59:33,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:59:33,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:59:33,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:59:33,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:59:33,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:59:33,831 INFO L87 Difference]: Start difference. First operand 6028 states and 8479 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-23 03:59:37,407 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 03:59:39,171 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:59:41,195 WARN L534 Checker$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 03:59:41,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:59:41,384 INFO L93 Difference]: Finished difference Result 12075 states and 17027 transitions. [2021-11-23 03:59:41,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:59:41,385 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 180 [2021-11-23 03:59:41,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:59:41,411 INFO L225 Difference]: With dead ends: 12075 [2021-11-23 03:59:41,411 INFO L226 Difference]: Without dead ends: 6048 [2021-11-23 03:59:41,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:59:41,436 INFO L933 BasicCegarLoop]: 795 mSDtfsCounter, 2 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1590 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:59:41,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1590 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 296 Invalid, 2 Unknown, 0 Unchecked, 7.3s Time] [2021-11-23 03:59:41,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6048 states. [2021-11-23 03:59:41,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6048 to 6038. [2021-11-23 03:59:41,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6038 states, 3813 states have (on average 1.2811434565958564) internal successors, (4885), 3917 states have internal predecessors, (4885), 1651 states have call successors, (1651), 569 states have call predecessors, (1651), 573 states have return successors, (1953), 1592 states have call predecessors, (1953), 1644 states have call successors, (1953) [2021-11-23 03:59:41,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6038 states to 6038 states and 8489 transitions. [2021-11-23 03:59:41,867 INFO L78 Accepts]: Start accepts. Automaton has 6038 states and 8489 transitions. Word has length 180 [2021-11-23 03:59:41,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:59:41,868 INFO L470 AbstractCegarLoop]: Abstraction has 6038 states and 8489 transitions. [2021-11-23 03:59:41,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-23 03:59:41,868 INFO L276 IsEmpty]: Start isEmpty. Operand 6038 states and 8489 transitions. [2021-11-23 03:59:41,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-23 03:59:41,874 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:59:41,874 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:59:41,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 03:59:42,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-23 03:59:42,099 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:59:42,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:59:42,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1635233365, now seen corresponding path program 1 times [2021-11-23 03:59:42,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:59:42,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972288584] [2021-11-23 03:59:42,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:59:42,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:59:42,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:59:42,335 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-23 03:59:42,335 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:59:42,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972288584] [2021-11-23 03:59:42,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972288584] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:59:42,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782291132] [2021-11-23 03:59:42,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:59:42,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:59:42,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:59:42,355 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:59:42,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 03:59:43,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:59:43,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 2259 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 03:59:43,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:59:43,563 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-23 03:59:43,563 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:59:43,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782291132] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:59:43,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:59:43,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-23 03:59:43,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386143670] [2021-11-23 03:59:43,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:59:43,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:59:43,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:59:43,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:59:43,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:59:43,565 INFO L87 Difference]: Start difference. First operand 6038 states and 8489 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-23 03:59:46,817 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:59:49,113 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:59:51,143 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:59:51,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:59:51,324 INFO L93 Difference]: Finished difference Result 12085 states and 17027 transitions. [2021-11-23 03:59:51,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:59:51,325 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 182 [2021-11-23 03:59:51,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:59:51,343 INFO L225 Difference]: With dead ends: 12085 [2021-11-23 03:59:51,343 INFO L226 Difference]: Without dead ends: 6048 [2021-11-23 03:59:51,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:59:51,363 INFO L933 BasicCegarLoop]: 796 mSDtfsCounter, 0 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1591 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:59:51,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1591 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 295 Invalid, 2 Unknown, 0 Unchecked, 7.5s Time] [2021-11-23 03:59:51,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6048 states. [2021-11-23 03:59:51,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6048 to 6048. [2021-11-23 03:59:51,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6048 states, 3823 states have (on average 1.2804080565001308) internal successors, (4895), 3927 states have internal predecessors, (4895), 1651 states have call successors, (1651), 569 states have call predecessors, (1651), 573 states have return successors, (1953), 1592 states have call predecessors, (1953), 1644 states have call successors, (1953) [2021-11-23 03:59:51,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6048 states to 6048 states and 8499 transitions. [2021-11-23 03:59:51,709 INFO L78 Accepts]: Start accepts. Automaton has 6048 states and 8499 transitions. Word has length 182 [2021-11-23 03:59:51,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:59:51,710 INFO L470 AbstractCegarLoop]: Abstraction has 6048 states and 8499 transitions. [2021-11-23 03:59:51,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-23 03:59:51,710 INFO L276 IsEmpty]: Start isEmpty. Operand 6048 states and 8499 transitions. [2021-11-23 03:59:51,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-23 03:59:51,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:59:51,717 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:59:51,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 03:59:51,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:59:51,931 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:59:51,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:59:51,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1627357780, now seen corresponding path program 1 times [2021-11-23 03:59:51,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:59:51,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269285135] [2021-11-23 03:59:51,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:59:51,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:59:52,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:59:52,123 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-23 03:59:52,124 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:59:52,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269285135] [2021-11-23 03:59:52,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269285135] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:59:52,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983605884] [2021-11-23 03:59:52,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:59:52,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:59:52,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:59:52,126 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:59:52,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 03:59:52,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:59:52,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 2269 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:59:52,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:59:53,253 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-23 03:59:53,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:59:53,771 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-23 03:59:53,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983605884] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:59:53,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1630433606] [2021-11-23 03:59:53,785 INFO L159 IcfgInterpreter]: Started Sifa with 134 locations of interest [2021-11-23 03:59:53,785 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:59:53,788 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:59:53,789 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:59:53,789 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:59:57,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-23 03:59:57,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 04:00:11,029 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: not yet implemented, we need term in nnf at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PrenexNormalForm.convertApplicationTerm(PrenexNormalForm.java:89) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$BuildApplicationTerm.walk(TermTransformer.java:339) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:109) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:903) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:865) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:783) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:162) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:243) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:233) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:119) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpretForSingleMarker(DagInterpreter.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.computeTopSummary(TopInputCallSummarizer.java:85) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.summarize(TopInputCallSummarizer.java:71) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:220) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:207) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 04:00:11,031 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 04:00:11,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-23 04:00:11,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449796821] [2021-11-23 04:00:11,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 04:00:11,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 04:00:11,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 04:00:11,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 04:00:11,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 04:00:11,034 INFO L87 Difference]: Start difference. First operand 6048 states and 8499 transitions. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 5 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (46), 5 states have call predecessors, (46), 5 states have call successors, (46) [2021-11-23 04:00:13,911 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:00:19,604 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:00:21,569 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:00:23,632 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:00:24,755 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:00:24,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 04:00:24,905 INFO L93 Difference]: Finished difference Result 18015 states and 27213 transitions. [2021-11-23 04:00:24,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 04:00:24,906 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 5 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (46), 5 states have call predecessors, (46), 5 states have call successors, (46) Word has length 183 [2021-11-23 04:00:24,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 04:00:24,949 INFO L225 Difference]: With dead ends: 18015 [2021-11-23 04:00:24,950 INFO L226 Difference]: Without dead ends: 11968 [2021-11-23 04:00:24,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 04:00:24,969 INFO L933 BasicCegarLoop]: 1102 mSDtfsCounter, 1172 mSDsluCounter, 1333 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 279 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1354 SdHoareTripleChecker+Valid, 2181 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2021-11-23 04:00:24,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1354 Valid, 2181 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 634 Invalid, 2 Unknown, 0 Unchecked, 13.0s Time] [2021-11-23 04:00:24,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11968 states. [2021-11-23 04:00:25,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11968 to 6168. [2021-11-23 04:00:25,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6168 states, 3913 states have (on average 1.2816253513927933) internal successors, (5015), 4017 states have internal predecessors, (5015), 1681 states have call successors, (1681), 569 states have call predecessors, (1681), 573 states have return successors, (1983), 1622 states have call predecessors, (1983), 1674 states have call successors, (1983) [2021-11-23 04:00:25,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6168 states to 6168 states and 8679 transitions. [2021-11-23 04:00:25,565 INFO L78 Accepts]: Start accepts. Automaton has 6168 states and 8679 transitions. Word has length 183 [2021-11-23 04:00:25,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 04:00:25,565 INFO L470 AbstractCegarLoop]: Abstraction has 6168 states and 8679 transitions. [2021-11-23 04:00:25,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 5 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (46), 5 states have call predecessors, (46), 5 states have call successors, (46) [2021-11-23 04:00:25,566 INFO L276 IsEmpty]: Start isEmpty. Operand 6168 states and 8679 transitions. [2021-11-23 04:00:25,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-23 04:00:25,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 04:00:25,570 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:00:25,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 04:00:25,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 04:00:25,772 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 04:00:25,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 04:00:25,772 INFO L85 PathProgramCache]: Analyzing trace with hash -490404673, now seen corresponding path program 1 times [2021-11-23 04:00:25,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 04:00:25,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889914738] [2021-11-23 04:00:25,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 04:00:25,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 04:00:25,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 04:00:25,981 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-23 04:00:25,982 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 04:00:25,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889914738] [2021-11-23 04:00:25,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889914738] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 04:00:25,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21868698] [2021-11-23 04:00:25,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 04:00:25,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 04:00:25,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 04:00:25,984 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 04:00:26,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 04:00:26,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 04:00:26,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 2441 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 04:00:26,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 04:00:27,011 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-23 04:00:27,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 04:00:27,458 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-23 04:00:27,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21868698] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 04:00:27,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1237463324] [2021-11-23 04:00:27,463 INFO L159 IcfgInterpreter]: Started Sifa with 135 locations of interest [2021-11-23 04:00:27,464 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 04:00:27,465 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 04:00:27,465 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 04:00:27,465 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 04:00:31,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 04:00:31,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-23 04:00:35,885 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: not yet implemented, we need term in nnf at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PrenexNormalForm.convertApplicationTerm(PrenexNormalForm.java:89) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$BuildApplicationTerm.walk(TermTransformer.java:339) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:109) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:903) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:865) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:783) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:162) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:243) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:233) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:119) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpretForSingleMarker(DagInterpreter.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.computeTopSummary(TopInputCallSummarizer.java:85) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.summarize(TopInputCallSummarizer.java:71) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:220) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:207) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 04:00:35,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 04:00:35,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-23 04:00:35,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361561027] [2021-11-23 04:00:35,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 04:00:35,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 04:00:35,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 04:00:35,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 04:00:35,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 04:00:35,890 INFO L87 Difference]: Start difference. First operand 6168 states and 8679 transitions. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 5 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (44), 5 states have call predecessors, (44), 5 states have call successors, (44) [2021-11-23 04:00:39,989 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:00:41,761 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:00:43,788 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:00:44,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 04:00:44,694 INFO L93 Difference]: Finished difference Result 12443 states and 17581 transitions. [2021-11-23 04:00:44,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 04:00:44,695 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 5 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (44), 5 states have call predecessors, (44), 5 states have call successors, (44) Word has length 194 [2021-11-23 04:00:44,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 04:00:44,715 INFO L225 Difference]: With dead ends: 12443 [2021-11-23 04:00:44,715 INFO L226 Difference]: Without dead ends: 6276 [2021-11-23 04:00:44,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 385 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 04:00:44,733 INFO L933 BasicCegarLoop]: 798 mSDtfsCounter, 6 mSDsluCounter, 1878 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 9 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2386 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2021-11-23 04:00:44,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2386 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 451 Invalid, 2 Unknown, 0 Unchecked, 8.5s Time] [2021-11-23 04:00:44,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6276 states. [2021-11-23 04:00:45,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6276 to 6276. [2021-11-23 04:00:45,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6276 states, 3985 states have (on average 1.2765370138017567) internal successors, (5087), 4089 states have internal predecessors, (5087), 1717 states have call successors, (1717), 569 states have call predecessors, (1717), 573 states have return successors, (2019), 1658 states have call predecessors, (2019), 1710 states have call successors, (2019) [2021-11-23 04:00:45,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6276 states to 6276 states and 8823 transitions. [2021-11-23 04:00:45,092 INFO L78 Accepts]: Start accepts. Automaton has 6276 states and 8823 transitions. Word has length 194 [2021-11-23 04:00:45,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 04:00:45,093 INFO L470 AbstractCegarLoop]: Abstraction has 6276 states and 8823 transitions. [2021-11-23 04:00:45,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 5 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (44), 5 states have call predecessors, (44), 5 states have call successors, (44) [2021-11-23 04:00:45,093 INFO L276 IsEmpty]: Start isEmpty. Operand 6276 states and 8823 transitions. [2021-11-23 04:00:45,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-23 04:00:45,097 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 04:00:45,098 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:00:45,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 04:00:45,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 04:00:45,299 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 04:00:45,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 04:00:45,299 INFO L85 PathProgramCache]: Analyzing trace with hash 249110662, now seen corresponding path program 2 times [2021-11-23 04:00:45,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 04:00:45,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540269831] [2021-11-23 04:00:45,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 04:00:45,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 04:00:45,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 04:00:45,603 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-11-23 04:00:45,603 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 04:00:45,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540269831] [2021-11-23 04:00:45,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540269831] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 04:00:45,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 04:00:45,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 04:00:45,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477303230] [2021-11-23 04:00:45,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 04:00:45,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 04:00:45,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 04:00:45,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 04:00:45,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 04:00:45,606 INFO L87 Difference]: Start difference. First operand 6276 states and 8823 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-23 04:00:48,466 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 04:00:51,077 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:00:51,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 04:00:51,457 INFO L93 Difference]: Finished difference Result 9382 states and 13111 transitions. [2021-11-23 04:00:51,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 04:00:51,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 209 [2021-11-23 04:00:51,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 04:00:51,486 INFO L225 Difference]: With dead ends: 9382 [2021-11-23 04:00:51,486 INFO L226 Difference]: Without dead ends: 9377 [2021-11-23 04:00:51,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 04:00:51,493 INFO L933 BasicCegarLoop]: 992 mSDtfsCounter, 832 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 1575 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-23 04:00:51,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [832 Valid, 1575 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 278 Invalid, 2 Unknown, 0 Unchecked, 5.4s Time] [2021-11-23 04:00:51,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9377 states. [2021-11-23 04:00:51,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9377 to 9334. [2021-11-23 04:00:51,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9334 states, 5886 states have (on average 1.2711518858307849) internal successors, (7482), 6052 states have internal predecessors, (7482), 2548 states have call successors, (2548), 903 states have call predecessors, (2548), 899 states have return successors, (3026), 2443 states have call predecessors, (3026), 2541 states have call successors, (3026) [2021-11-23 04:00:51,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9334 states to 9334 states and 13056 transitions. [2021-11-23 04:00:51,965 INFO L78 Accepts]: Start accepts. Automaton has 9334 states and 13056 transitions. Word has length 209 [2021-11-23 04:00:51,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 04:00:51,966 INFO L470 AbstractCegarLoop]: Abstraction has 9334 states and 13056 transitions. [2021-11-23 04:00:51,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-23 04:00:51,966 INFO L276 IsEmpty]: Start isEmpty. Operand 9334 states and 13056 transitions. [2021-11-23 04:00:51,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-11-23 04:00:51,970 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 04:00:51,970 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:00:51,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-23 04:00:51,970 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 04:00:51,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 04:00:51,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1697636904, now seen corresponding path program 1 times [2021-11-23 04:00:51,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 04:00:51,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542515500] [2021-11-23 04:00:51,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 04:00:51,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 04:00:54,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 04:00:55,307 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-23 04:00:55,307 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 04:00:55,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542515500] [2021-11-23 04:00:55,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542515500] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 04:00:55,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 04:00:55,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 04:00:55,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616875255] [2021-11-23 04:00:55,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 04:00:55,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 04:00:55,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 04:00:55,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 04:00:55,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-23 04:00:55,309 INFO L87 Difference]: Start difference. First operand 9334 states and 13056 transitions. Second operand has 7 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 4 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (35), 4 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-23 04:01:00,439 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 04:01:04,889 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:01:06,916 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:01:08,944 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:01:10,971 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:01:13,055 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:01:15,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 04:01:15,798 INFO L93 Difference]: Finished difference Result 13871 states and 19474 transitions. [2021-11-23 04:01:15,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 04:01:15,799 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 4 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (35), 4 states have call predecessors, (35), 3 states have call successors, (35) Word has length 226 [2021-11-23 04:01:15,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 04:01:15,840 INFO L225 Difference]: With dead ends: 13871 [2021-11-23 04:01:15,840 INFO L226 Difference]: Without dead ends: 13863 [2021-11-23 04:01:15,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-23 04:01:15,847 INFO L933 BasicCegarLoop]: 756 mSDtfsCounter, 2022 mSDsluCounter, 1593 mSDsCounter, 0 mSdLazyCounter, 1923 mSolverCounterSat, 1995 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2172 SdHoareTripleChecker+Valid, 2043 SdHoareTripleChecker+Invalid, 3923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1995 IncrementalHoareTripleChecker+Valid, 1923 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.8s IncrementalHoareTripleChecker+Time [2021-11-23 04:01:15,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2172 Valid, 2043 Invalid, 3923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1995 Valid, 1923 Invalid, 5 Unknown, 0 Unchecked, 19.8s Time] [2021-11-23 04:01:15,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13863 states. [2021-11-23 04:01:16,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13863 to 13788. [2021-11-23 04:01:16,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13788 states, 8693 states have (on average 1.272518118025998) internal successors, (11062), 8951 states have internal predecessors, (11062), 3779 states have call successors, (3779), 1330 states have call predecessors, (3779), 1315 states have return successors, (4515), 3604 states have call predecessors, (4515), 3772 states have call successors, (4515) [2021-11-23 04:01:16,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13788 states to 13788 states and 19356 transitions. [2021-11-23 04:01:16,575 INFO L78 Accepts]: Start accepts. Automaton has 13788 states and 19356 transitions. Word has length 226 [2021-11-23 04:01:16,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 04:01:16,575 INFO L470 AbstractCegarLoop]: Abstraction has 13788 states and 19356 transitions. [2021-11-23 04:01:16,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 4 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (35), 4 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-23 04:01:16,576 INFO L276 IsEmpty]: Start isEmpty. Operand 13788 states and 19356 transitions. [2021-11-23 04:01:16,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-23 04:01:16,583 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 04:01:16,583 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:01:16,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-23 04:01:16,584 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 04:01:16,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 04:01:16,585 INFO L85 PathProgramCache]: Analyzing trace with hash -866412915, now seen corresponding path program 1 times [2021-11-23 04:01:16,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 04:01:16,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903673536] [2021-11-23 04:01:16,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 04:01:16,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 04:01:16,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 04:01:16,913 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-11-23 04:01:16,913 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 04:01:16,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903673536] [2021-11-23 04:01:16,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903673536] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 04:01:16,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 04:01:16,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 04:01:16,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732045618] [2021-11-23 04:01:16,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 04:01:16,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 04:01:16,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 04:01:16,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 04:01:16,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 04:01:16,916 INFO L87 Difference]: Start difference. First operand 13788 states and 19356 transitions. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 4 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-23 04:01:21,134 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 04:01:25,447 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:01:27,412 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:01:30,332 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:01:32,043 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:01:33,804 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:01:35,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 04:01:35,250 INFO L93 Difference]: Finished difference Result 16087 states and 22499 transitions. [2021-11-23 04:01:35,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 04:01:35,251 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 4 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) Word has length 240 [2021-11-23 04:01:35,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 04:01:35,302 INFO L225 Difference]: With dead ends: 16087 [2021-11-23 04:01:35,303 INFO L226 Difference]: Without dead ends: 16076 [2021-11-23 04:01:35,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 04:01:35,311 INFO L933 BasicCegarLoop]: 745 mSDtfsCounter, 943 mSDsluCounter, 1041 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 492 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1095 SdHoareTripleChecker+Valid, 1586 SdHoareTripleChecker+Invalid, 1862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 492 IncrementalHoareTripleChecker+Valid, 1367 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.5s IncrementalHoareTripleChecker+Time [2021-11-23 04:01:35,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1095 Valid, 1586 Invalid, 1862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [492 Valid, 1367 Invalid, 3 Unknown, 0 Unchecked, 17.5s Time] [2021-11-23 04:01:35,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16076 states. [2021-11-23 04:01:36,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16076 to 16015. [2021-11-23 04:01:36,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16015 states, 10063 states have (on average 1.2695021365397994) internal successors, (12775), 10374 states have internal predecessors, (12775), 4391 states have call successors, (4391), 1577 states have call predecessors, (4391), 1560 states have return successors, (5240), 4179 states have call predecessors, (5240), 4384 states have call successors, (5240) [2021-11-23 04:01:36,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16015 states to 16015 states and 22406 transitions. [2021-11-23 04:01:36,150 INFO L78 Accepts]: Start accepts. Automaton has 16015 states and 22406 transitions. Word has length 240 [2021-11-23 04:01:36,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 04:01:36,151 INFO L470 AbstractCegarLoop]: Abstraction has 16015 states and 22406 transitions. [2021-11-23 04:01:36,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 4 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-23 04:01:36,151 INFO L276 IsEmpty]: Start isEmpty. Operand 16015 states and 22406 transitions. [2021-11-23 04:01:36,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-11-23 04:01:36,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 04:01:36,160 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:01:36,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-23 04:01:36,160 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 04:01:36,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 04:01:36,161 INFO L85 PathProgramCache]: Analyzing trace with hash 78399180, now seen corresponding path program 1 times [2021-11-23 04:01:36,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 04:01:36,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895448836] [2021-11-23 04:01:36,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 04:01:36,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 04:01:36,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 04:01:36,478 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-23 04:01:36,478 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 04:01:36,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895448836] [2021-11-23 04:01:36,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895448836] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 04:01:36,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 04:01:36,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 04:01:36,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830687818] [2021-11-23 04:01:36,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 04:01:36,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 04:01:36,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 04:01:36,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 04:01:36,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 04:01:36,483 INFO L87 Difference]: Start difference. First operand 16015 states and 22406 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-23 04:01:39,425 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 04:01:42,051 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:01:43,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 04:01:43,376 INFO L93 Difference]: Finished difference Result 19338 states and 27073 transitions. [2021-11-23 04:01:43,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 04:01:43,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 242 [2021-11-23 04:01:43,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 04:01:43,443 INFO L225 Difference]: With dead ends: 19338 [2021-11-23 04:01:43,443 INFO L226 Difference]: Without dead ends: 19334 [2021-11-23 04:01:43,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 04:01:43,454 INFO L933 BasicCegarLoop]: 997 mSDtfsCounter, 796 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 1773 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-11-23 04:01:43,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [796 Valid, 1773 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 303 Invalid, 2 Unknown, 0 Unchecked, 6.0s Time] [2021-11-23 04:01:43,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19334 states. [2021-11-23 04:01:44,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19334 to 19193. [2021-11-23 04:01:44,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19193 states, 12029 states have (on average 1.2698478676531715) internal successors, (15275), 12431 states have internal predecessors, (15275), 5287 states have call successors, (5287), 1902 states have call predecessors, (5287), 1876 states have return successors, (6301), 5000 states have call predecessors, (6301), 5280 states have call successors, (6301) [2021-11-23 04:01:44,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19193 states to 19193 states and 26863 transitions. [2021-11-23 04:01:44,426 INFO L78 Accepts]: Start accepts. Automaton has 19193 states and 26863 transitions. Word has length 242 [2021-11-23 04:01:44,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 04:01:44,427 INFO L470 AbstractCegarLoop]: Abstraction has 19193 states and 26863 transitions. [2021-11-23 04:01:44,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-23 04:01:44,427 INFO L276 IsEmpty]: Start isEmpty. Operand 19193 states and 26863 transitions. [2021-11-23 04:01:44,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-11-23 04:01:44,435 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 04:01:44,436 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:01:44,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-23 04:01:44,436 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 04:01:44,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 04:01:44,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1980396842, now seen corresponding path program 1 times [2021-11-23 04:01:44,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 04:01:44,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627475078] [2021-11-23 04:01:44,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 04:01:44,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 04:01:44,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 04:01:44,950 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-23 04:01:44,950 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 04:01:44,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627475078] [2021-11-23 04:01:44,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627475078] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 04:01:44,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 04:01:44,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 04:01:44,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083694050] [2021-11-23 04:01:44,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 04:01:44,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 04:01:44,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 04:01:44,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 04:01:44,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 04:01:44,953 INFO L87 Difference]: Start difference. First operand 19193 states and 26863 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-23 04:01:47,625 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 04:01:49,503 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:01:50,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 04:01:50,180 INFO L93 Difference]: Finished difference Result 19195 states and 26864 transitions. [2021-11-23 04:01:50,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 04:01:50,181 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 242 [2021-11-23 04:01:50,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 04:01:50,253 INFO L225 Difference]: With dead ends: 19195 [2021-11-23 04:01:50,254 INFO L226 Difference]: Without dead ends: 19192 [2021-11-23 04:01:50,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 04:01:50,266 INFO L933 BasicCegarLoop]: 793 mSDtfsCounter, 856 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-23 04:01:50,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [856 Valid, 793 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 149 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2021-11-23 04:01:50,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19192 states. [2021-11-23 04:01:51,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19192 to 19192. [2021-11-23 04:01:51,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19192 states, 12029 states have (on average 1.2696816027932496) internal successors, (15273), 12430 states have internal predecessors, (15273), 5286 states have call successors, (5286), 1902 states have call predecessors, (5286), 1876 states have return successors, (6301), 5000 states have call predecessors, (6301), 5280 states have call successors, (6301) [2021-11-23 04:01:51,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19192 states to 19192 states and 26860 transitions. [2021-11-23 04:01:51,619 INFO L78 Accepts]: Start accepts. Automaton has 19192 states and 26860 transitions. Word has length 242 [2021-11-23 04:01:51,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 04:01:51,620 INFO L470 AbstractCegarLoop]: Abstraction has 19192 states and 26860 transitions. [2021-11-23 04:01:51,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-23 04:01:51,620 INFO L276 IsEmpty]: Start isEmpty. Operand 19192 states and 26860 transitions. [2021-11-23 04:01:51,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-11-23 04:01:51,629 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 04:01:51,629 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:01:51,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-23 04:01:51,630 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 04:01:51,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 04:01:51,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1263161223, now seen corresponding path program 1 times [2021-11-23 04:01:51,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 04:01:51,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892214799] [2021-11-23 04:01:51,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 04:01:51,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 04:01:51,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 04:01:51,967 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-23 04:01:51,968 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 04:01:51,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892214799] [2021-11-23 04:01:51,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892214799] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 04:01:51,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 04:01:51,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 04:01:51,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929975755] [2021-11-23 04:01:51,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 04:01:51,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 04:01:51,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 04:01:51,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 04:01:51,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 04:01:51,971 INFO L87 Difference]: Start difference. First operand 19192 states and 26860 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-23 04:01:55,035 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 04:01:57,383 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:01:59,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 04:01:59,632 INFO L93 Difference]: Finished difference Result 32348 states and 45187 transitions. [2021-11-23 04:01:59,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 04:01:59,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 243 [2021-11-23 04:01:59,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 04:01:59,741 INFO L225 Difference]: With dead ends: 32348 [2021-11-23 04:01:59,741 INFO L226 Difference]: Without dead ends: 32339 [2021-11-23 04:01:59,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 04:01:59,753 INFO L933 BasicCegarLoop]: 988 mSDtfsCounter, 835 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 1778 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-11-23 04:01:59,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [835 Valid, 1778 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 295 Invalid, 2 Unknown, 0 Unchecked, 6.1s Time] [2021-11-23 04:01:59,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32339 states. [2021-11-23 04:02:01,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32339 to 32325. [2021-11-23 04:02:01,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32325 states, 20204 states have (on average 1.265640467234211) internal successors, (25571), 20895 states have internal predecessors, (25571), 8914 states have call successors, (8914), 3252 states have call predecessors, (8914), 3206 states have return successors, (10575), 8418 states have call predecessors, (10575), 8908 states have call successors, (10575) [2021-11-23 04:02:01,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32325 states to 32325 states and 45060 transitions. [2021-11-23 04:02:01,672 INFO L78 Accepts]: Start accepts. Automaton has 32325 states and 45060 transitions. Word has length 243 [2021-11-23 04:02:01,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 04:02:01,673 INFO L470 AbstractCegarLoop]: Abstraction has 32325 states and 45060 transitions. [2021-11-23 04:02:01,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-23 04:02:01,673 INFO L276 IsEmpty]: Start isEmpty. Operand 32325 states and 45060 transitions. [2021-11-23 04:02:01,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-11-23 04:02:01,711 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 04:02:01,712 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:02:01,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-23 04:02:01,712 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 04:02:01,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 04:02:01,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1244047875, now seen corresponding path program 1 times [2021-11-23 04:02:01,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 04:02:01,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208636528] [2021-11-23 04:02:01,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 04:02:01,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 04:02:01,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 04:02:01,996 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2021-11-23 04:02:01,996 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 04:02:01,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208636528] [2021-11-23 04:02:01,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208636528] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 04:02:01,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 04:02:01,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 04:02:01,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501714564] [2021-11-23 04:02:01,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 04:02:01,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 04:02:01,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 04:02:01,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 04:02:01,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 04:02:02,000 INFO L87 Difference]: Start difference. First operand 32325 states and 45060 transitions. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (38), 3 states have call predecessors, (38), 2 states have call successors, (38) [2021-11-23 04:02:07,656 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 04:02:09,994 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:02:15,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 04:02:15,316 INFO L93 Difference]: Finished difference Result 76283 states and 109208 transitions. [2021-11-23 04:02:15,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 04:02:15,320 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (38), 3 states have call predecessors, (38), 2 states have call successors, (38) Word has length 259 [2021-11-23 04:02:15,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 04:02:15,511 INFO L225 Difference]: With dead ends: 76283 [2021-11-23 04:02:15,512 INFO L226 Difference]: Without dead ends: 43959 [2021-11-23 04:02:15,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 04:02:15,610 INFO L933 BasicCegarLoop]: 1220 mSDtfsCounter, 272 mSDsluCounter, 3886 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 4554 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2021-11-23 04:02:15,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 4554 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 773 Invalid, 2 Unknown, 0 Unchecked, 10.2s Time] [2021-11-23 04:02:15,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43959 states. [2021-11-23 04:02:18,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43959 to 32247. [2021-11-23 04:02:18,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32247 states, 20210 states have (on average 1.2632855022266205) internal successors, (25531), 20837 states have internal predecessors, (25531), 8838 states have call successors, (8838), 3230 states have call predecessors, (8838), 3198 states have return successors, (10477), 8420 states have call predecessors, (10477), 8832 states have call successors, (10477) [2021-11-23 04:02:18,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32247 states to 32247 states and 44846 transitions. [2021-11-23 04:02:18,422 INFO L78 Accepts]: Start accepts. Automaton has 32247 states and 44846 transitions. Word has length 259 [2021-11-23 04:02:18,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 04:02:18,423 INFO L470 AbstractCegarLoop]: Abstraction has 32247 states and 44846 transitions. [2021-11-23 04:02:18,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (38), 3 states have call predecessors, (38), 2 states have call successors, (38) [2021-11-23 04:02:18,424 INFO L276 IsEmpty]: Start isEmpty. Operand 32247 states and 44846 transitions. [2021-11-23 04:02:18,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-11-23 04:02:18,433 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 04:02:18,434 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:02:18,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-23 04:02:18,434 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 04:02:18,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 04:02:18,435 INFO L85 PathProgramCache]: Analyzing trace with hash -627646807, now seen corresponding path program 1 times [2021-11-23 04:02:18,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 04:02:18,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099954026] [2021-11-23 04:02:18,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 04:02:18,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 04:02:18,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 04:02:18,740 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-23 04:02:18,741 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 04:02:18,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099954026] [2021-11-23 04:02:18,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099954026] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 04:02:18,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 04:02:18,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 04:02:18,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474232908] [2021-11-23 04:02:18,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 04:02:18,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 04:02:18,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 04:02:18,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 04:02:18,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 04:02:18,744 INFO L87 Difference]: Start difference. First operand 32247 states and 44846 transitions. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (37), 3 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-23 04:02:24,102 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 04:02:25,843 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:02:27,572 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:02:29,566 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:02:31,627 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:02:36,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 04:02:36,409 INFO L93 Difference]: Finished difference Result 70988 states and 101547 transitions. [2021-11-23 04:02:36,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 04:02:36,415 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (37), 3 states have call predecessors, (37), 2 states have call successors, (37) Word has length 251 [2021-11-23 04:02:36,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 04:02:36,583 INFO L225 Difference]: With dead ends: 70988 [2021-11-23 04:02:36,583 INFO L226 Difference]: Without dead ends: 41902 [2021-11-23 04:02:36,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 04:02:36,790 INFO L933 BasicCegarLoop]: 1225 mSDtfsCounter, 301 mSDsluCounter, 3907 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 4568 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2021-11-23 04:02:36,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 4568 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 784 Invalid, 2 Unknown, 0 Unchecked, 14.4s Time] [2021-11-23 04:02:36,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41902 states. [2021-11-23 04:02:39,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41902 to 32123. [2021-11-23 04:02:39,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32123 states, 20138 states have (on average 1.2628364286423677) internal successors, (25431), 20761 states have internal predecessors, (25431), 8792 states have call successors, (8792), 3222 states have call predecessors, (8792), 3192 states have return successors, (10427), 8380 states have call predecessors, (10427), 8786 states have call successors, (10427) [2021-11-23 04:02:39,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32123 states to 32123 states and 44650 transitions. [2021-11-23 04:02:39,265 INFO L78 Accepts]: Start accepts. Automaton has 32123 states and 44650 transitions. Word has length 251 [2021-11-23 04:02:39,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 04:02:39,266 INFO L470 AbstractCegarLoop]: Abstraction has 32123 states and 44650 transitions. [2021-11-23 04:02:39,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (37), 3 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-23 04:02:39,266 INFO L276 IsEmpty]: Start isEmpty. Operand 32123 states and 44650 transitions. [2021-11-23 04:02:39,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2021-11-23 04:02:39,272 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 04:02:39,273 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:02:39,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-23 04:02:39,273 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 04:02:39,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 04:02:39,274 INFO L85 PathProgramCache]: Analyzing trace with hash -444483492, now seen corresponding path program 1 times [2021-11-23 04:02:39,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 04:02:39,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556088802] [2021-11-23 04:02:39,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 04:02:39,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 04:02:39,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 04:02:39,775 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-23 04:02:39,775 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 04:02:39,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556088802] [2021-11-23 04:02:39,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556088802] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 04:02:39,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 04:02:39,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 04:02:39,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827673214] [2021-11-23 04:02:39,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 04:02:39,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 04:02:39,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 04:02:39,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 04:02:39,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 04:02:39,779 INFO L87 Difference]: Start difference. First operand 32123 states and 44650 transitions. Second operand has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 5 states have internal predecessors, (119), 3 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (40), 4 states have call predecessors, (40), 3 states have call successors, (40) [2021-11-23 04:02:45,189 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:02:47,097 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:02:48,196 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:02:50,218 WARN L534 Checker$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 04:02:52,250 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:02:55,569 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:02:57,592 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:02:59,568 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:03:01,608 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:03:05,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 04:03:05,935 INFO L93 Difference]: Finished difference Result 76319 states and 109253 transitions. [2021-11-23 04:03:05,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 04:03:05,936 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 5 states have internal predecessors, (119), 3 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (40), 4 states have call predecessors, (40), 3 states have call successors, (40) Word has length 273 [2021-11-23 04:03:05,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 04:03:06,173 INFO L225 Difference]: With dead ends: 76319 [2021-11-23 04:03:06,174 INFO L226 Difference]: Without dead ends: 44197 [2021-11-23 04:03:06,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 04:03:06,308 INFO L933 BasicCegarLoop]: 1246 mSDtfsCounter, 290 mSDsluCounter, 5405 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 6 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 5872 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.5s IncrementalHoareTripleChecker+Time [2021-11-23 04:03:06,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [411 Valid, 5872 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1018 Invalid, 5 Unknown, 0 Unchecked, 22.5s Time] [2021-11-23 04:03:06,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44197 states. [2021-11-23 04:03:09,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44197 to 31735. [2021-11-23 04:03:09,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31735 states, 19889 states have (on average 1.2620544019307154) internal successors, (25101), 20536 states have internal predecessors, (25101), 8663 states have call successors, (8663), 3182 states have call predecessors, (8663), 3182 states have return successors, (10369), 8257 states have call predecessors, (10369), 8657 states have call successors, (10369) [2021-11-23 04:03:09,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31735 states to 31735 states and 44133 transitions. [2021-11-23 04:03:09,254 INFO L78 Accepts]: Start accepts. Automaton has 31735 states and 44133 transitions. Word has length 273 [2021-11-23 04:03:09,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 04:03:09,255 INFO L470 AbstractCegarLoop]: Abstraction has 31735 states and 44133 transitions. [2021-11-23 04:03:09,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 5 states have internal predecessors, (119), 3 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (40), 4 states have call predecessors, (40), 3 states have call successors, (40) [2021-11-23 04:03:09,256 INFO L276 IsEmpty]: Start isEmpty. Operand 31735 states and 44133 transitions. [2021-11-23 04:03:09,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-23 04:03:09,265 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 04:03:09,265 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:03:09,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-23 04:03:09,266 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 04:03:09,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 04:03:09,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1113383083, now seen corresponding path program 1 times [2021-11-23 04:03:09,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 04:03:09,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856490206] [2021-11-23 04:03:09,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 04:03:09,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 04:03:09,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 04:03:09,681 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-23 04:03:09,681 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 04:03:09,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856490206] [2021-11-23 04:03:09,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856490206] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 04:03:09,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 04:03:09,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 04:03:09,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278695939] [2021-11-23 04:03:09,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 04:03:09,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 04:03:09,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 04:03:09,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 04:03:09,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 04:03:09,684 INFO L87 Difference]: Start difference. First operand 31735 states and 44133 transitions. Second operand has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 4 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2021-11-23 04:03:13,527 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 04:03:16,447 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:03:19,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 04:03:19,797 INFO L93 Difference]: Finished difference Result 34758 states and 48271 transitions. [2021-11-23 04:03:19,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 04:03:19,798 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 4 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) Word has length 255 [2021-11-23 04:03:19,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 04:03:19,970 INFO L225 Difference]: With dead ends: 34758 [2021-11-23 04:03:19,971 INFO L226 Difference]: Without dead ends: 34747 [2021-11-23 04:03:20,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 04:03:20,130 INFO L933 BasicCegarLoop]: 674 mSDtfsCounter, 1314 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 955 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1470 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 2043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 955 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2021-11-23 04:03:20,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1470 Valid, 1188 Invalid, 2043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [955 Valid, 1086 Invalid, 2 Unknown, 0 Unchecked, 7.8s Time] [2021-11-23 04:03:20,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34747 states. [2021-11-23 04:03:22,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34747 to 34673. [2021-11-23 04:03:22,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34673 states, 21695 states have (on average 1.260106015210878) internal successors, (27338), 22416 states have internal predecessors, (27338), 9472 states have call successors, (9472), 3504 states have call predecessors, (9472), 3505 states have return successors, (11334), 9017 states have call predecessors, (11334), 9466 states have call successors, (11334) [2021-11-23 04:03:23,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34673 states to 34673 states and 48144 transitions. [2021-11-23 04:03:23,056 INFO L78 Accepts]: Start accepts. Automaton has 34673 states and 48144 transitions. Word has length 255 [2021-11-23 04:03:23,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 04:03:23,057 INFO L470 AbstractCegarLoop]: Abstraction has 34673 states and 48144 transitions. [2021-11-23 04:03:23,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 4 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2021-11-23 04:03:23,057 INFO L276 IsEmpty]: Start isEmpty. Operand 34673 states and 48144 transitions. [2021-11-23 04:03:23,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-11-23 04:03:23,067 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 04:03:23,067 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:03:23,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-23 04:03:23,068 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 04:03:23,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 04:03:23,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1082238451, now seen corresponding path program 1 times [2021-11-23 04:03:23,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 04:03:23,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550517064] [2021-11-23 04:03:23,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 04:03:23,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 04:03:23,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 04:03:23,365 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-11-23 04:03:23,365 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 04:03:23,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550517064] [2021-11-23 04:03:23,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550517064] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 04:03:23,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 04:03:23,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 04:03:23,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077174499] [2021-11-23 04:03:23,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 04:03:23,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 04:03:23,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 04:03:23,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 04:03:23,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 04:03:23,368 INFO L87 Difference]: Start difference. First operand 34673 states and 48144 transitions. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 5 states have internal predecessors, (117), 3 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (39), 4 states have call predecessors, (39), 3 states have call successors, (39) [2021-11-23 04:03:29,063 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 04:03:30,514 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:03:33,006 WARN L534 Checker$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 04:03:35,036 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:03:37,604 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:03:39,633 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:03:41,062 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:03:46,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 04:03:46,534 INFO L93 Difference]: Finished difference Result 74367 states and 105662 transitions. [2021-11-23 04:03:46,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 04:03:46,535 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 5 states have internal predecessors, (117), 3 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (39), 4 states have call predecessors, (39), 3 states have call successors, (39) Word has length 262 [2021-11-23 04:03:46,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 04:03:46,707 INFO L225 Difference]: With dead ends: 74367 [2021-11-23 04:03:46,707 INFO L226 Difference]: Without dead ends: 42809 [2021-11-23 04:03:46,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 04:03:46,796 INFO L933 BasicCegarLoop]: 1230 mSDtfsCounter, 307 mSDsluCounter, 5344 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 6 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 5802 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.3s IncrementalHoareTripleChecker+Time [2021-11-23 04:03:46,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 5802 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1004 Invalid, 4 Unknown, 0 Unchecked, 19.3s Time] [2021-11-23 04:03:46,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42809 states. [2021-11-23 04:03:49,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42809 to 28817. [2021-11-23 04:03:49,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28817 states, 18064 states have (on average 1.2616806908768823) internal successors, (22791), 18651 states have internal predecessors, (22791), 7863 states have call successors, (7863), 2873 states have call predecessors, (7863), 2889 states have return successors, (9363), 7509 states have call predecessors, (9363), 7857 states have call successors, (9363) [2021-11-23 04:03:49,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28817 states to 28817 states and 40017 transitions. [2021-11-23 04:03:49,522 INFO L78 Accepts]: Start accepts. Automaton has 28817 states and 40017 transitions. Word has length 262 [2021-11-23 04:03:49,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 04:03:49,522 INFO L470 AbstractCegarLoop]: Abstraction has 28817 states and 40017 transitions. [2021-11-23 04:03:49,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 5 states have internal predecessors, (117), 3 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (39), 4 states have call predecessors, (39), 3 states have call successors, (39) [2021-11-23 04:03:49,522 INFO L276 IsEmpty]: Start isEmpty. Operand 28817 states and 40017 transitions. [2021-11-23 04:03:49,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2021-11-23 04:03:49,529 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 04:03:49,530 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:03:49,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-23 04:03:49,530 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 04:03:49,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 04:03:49,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1007350422, now seen corresponding path program 1 times [2021-11-23 04:03:49,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 04:03:49,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64460560] [2021-11-23 04:03:49,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 04:03:49,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 04:03:49,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 04:03:49,908 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-11-23 04:03:49,909 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 04:03:49,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64460560] [2021-11-23 04:03:49,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64460560] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 04:03:49,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 04:03:49,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 04:03:49,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056770767] [2021-11-23 04:03:49,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 04:03:49,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 04:03:49,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 04:03:49,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 04:03:49,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 04:03:49,911 INFO L87 Difference]: Start difference. First operand 28817 states and 40017 transitions. Second operand has 6 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 3 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (44), 2 states have call predecessors, (44), 1 states have call successors, (44) [2021-11-23 04:03:55,702 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:03:57,114 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:03:58,352 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:04:00,375 WARN L534 Checker$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 04:04:02,148 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:04:04,181 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:04:06,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 04:04:06,603 INFO L93 Difference]: Finished difference Result 28857 states and 40049 transitions. [2021-11-23 04:04:06,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 04:04:06,603 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 3 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (44), 2 states have call predecessors, (44), 1 states have call successors, (44) Word has length 299 [2021-11-23 04:04:06,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 04:04:06,702 INFO L225 Difference]: With dead ends: 28857 [2021-11-23 04:04:06,702 INFO L226 Difference]: Without dead ends: 28854 [2021-11-23 04:04:06,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 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 04:04:06,717 INFO L933 BasicCegarLoop]: 792 mSDtfsCounter, 36 mSDsluCounter, 3618 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 6 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 3844 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2021-11-23 04:04:06,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 3844 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 771 Invalid, 3 Unknown, 0 Unchecked, 14.7s Time] [2021-11-23 04:04:06,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28854 states. [2021-11-23 04:04:08,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28854 to 28844. [2021-11-23 04:04:08,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28844 states, 18079 states have (on average 1.2615188893190996) internal successors, (22807), 18670 states have internal predecessors, (22807), 7862 states have call successors, (7862), 2881 states have call predecessors, (7862), 2902 states have return successors, (9363), 7509 states have call predecessors, (9363), 7857 states have call successors, (9363) [2021-11-23 04:04:09,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28844 states to 28844 states and 40032 transitions. [2021-11-23 04:04:09,077 INFO L78 Accepts]: Start accepts. Automaton has 28844 states and 40032 transitions. Word has length 299 [2021-11-23 04:04:09,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 04:04:09,078 INFO L470 AbstractCegarLoop]: Abstraction has 28844 states and 40032 transitions. [2021-11-23 04:04:09,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 3 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (44), 2 states have call predecessors, (44), 1 states have call successors, (44) [2021-11-23 04:04:09,078 INFO L276 IsEmpty]: Start isEmpty. Operand 28844 states and 40032 transitions. [2021-11-23 04:04:09,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-11-23 04:04:09,086 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 04:04:09,086 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:04:09,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-23 04:04:09,087 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 04:04:09,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 04:04:09,087 INFO L85 PathProgramCache]: Analyzing trace with hash -695628241, now seen corresponding path program 1 times [2021-11-23 04:04:09,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 04:04:09,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766172676] [2021-11-23 04:04:09,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 04:04:09,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 04:04:09,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 04:04:09,439 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-11-23 04:04:09,439 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 04:04:09,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766172676] [2021-11-23 04:04:09,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766172676] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 04:04:09,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 04:04:09,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 04:04:09,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416954080] [2021-11-23 04:04:09,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 04:04:09,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 04:04:09,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 04:04:09,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 04:04:09,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 04:04:09,443 INFO L87 Difference]: Start difference. First operand 28844 states and 40032 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 2 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) [2021-11-23 04:04:13,308 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:04:15,544 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:04:17,571 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:04:19,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 04:04:19,858 INFO L93 Difference]: Finished difference Result 57551 states and 80285 transitions. [2021-11-23 04:04:19,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 04:04:19,858 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 2 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) Word has length 330 [2021-11-23 04:04:19,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 04:04:20,074 INFO L225 Difference]: With dead ends: 57551 [2021-11-23 04:04:20,074 INFO L226 Difference]: Without dead ends: 28708 [2021-11-23 04:04:20,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 04:04:20,142 INFO L933 BasicCegarLoop]: 787 mSDtfsCounter, 10 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 1558 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2021-11-23 04:04:20,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 1558 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 296 Invalid, 2 Unknown, 0 Unchecked, 8.1s Time] [2021-11-23 04:04:20,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28708 states. [2021-11-23 04:04:22,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28708 to 28708. [2021-11-23 04:04:22,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28708 states, 18011 states have (on average 1.2587307756371107) internal successors, (22671), 18602 states have internal predecessors, (22671), 7794 states have call successors, (7794), 2881 states have call predecessors, (7794), 2902 states have return successors, (9295), 7441 states have call predecessors, (9295), 7789 states have call successors, (9295) [2021-11-23 04:04:22,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28708 states to 28708 states and 39760 transitions. [2021-11-23 04:04:22,384 INFO L78 Accepts]: Start accepts. Automaton has 28708 states and 39760 transitions. Word has length 330 [2021-11-23 04:04:22,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 04:04:22,385 INFO L470 AbstractCegarLoop]: Abstraction has 28708 states and 39760 transitions. [2021-11-23 04:04:22,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 2 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) [2021-11-23 04:04:22,385 INFO L276 IsEmpty]: Start isEmpty. Operand 28708 states and 39760 transitions. [2021-11-23 04:04:22,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-11-23 04:04:22,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 04:04:22,393 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:04:22,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-23 04:04:22,394 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 04:04:22,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 04:04:22,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1676150349, now seen corresponding path program 1 times [2021-11-23 04:04:22,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 04:04:22,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845231573] [2021-11-23 04:04:22,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 04:04:22,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 04:04:22,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 04:04:22,743 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-11-23 04:04:22,744 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 04:04:22,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845231573] [2021-11-23 04:04:22,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845231573] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 04:04:22,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 04:04:22,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 04:04:22,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742257716] [2021-11-23 04:04:22,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 04:04:22,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 04:04:22,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 04:04:22,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 04:04:22,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 04:04:22,747 INFO L87 Difference]: Start difference. First operand 28708 states and 39760 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 2 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) [2021-11-23 04:04:26,887 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 04:04:29,250 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:04:32,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 04:04:32,402 INFO L93 Difference]: Finished difference Result 57279 states and 79741 transitions. [2021-11-23 04:04:32,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 04:04:32,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 2 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) Word has length 330 [2021-11-23 04:04:32,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 04:04:32,500 INFO L225 Difference]: With dead ends: 57279 [2021-11-23 04:04:32,500 INFO L226 Difference]: Without dead ends: 28572 [2021-11-23 04:04:32,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 04:04:32,574 INFO L933 BasicCegarLoop]: 783 mSDtfsCounter, 5 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1557 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2021-11-23 04:04:32,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 1557 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 297 Invalid, 1 Unknown, 0 Unchecked, 7.3s Time] [2021-11-23 04:04:32,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28572 states. [2021-11-23 04:04:34,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28572 to 28572. [2021-11-23 04:04:34,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28572 states, 17943 states have (on average 1.2559215292871873) internal successors, (22535), 18534 states have internal predecessors, (22535), 7726 states have call successors, (7726), 2881 states have call predecessors, (7726), 2902 states have return successors, (9227), 7373 states have call predecessors, (9227), 7721 states have call successors, (9227) [2021-11-23 04:04:35,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28572 states to 28572 states and 39488 transitions. [2021-11-23 04:04:35,047 INFO L78 Accepts]: Start accepts. Automaton has 28572 states and 39488 transitions. Word has length 330 [2021-11-23 04:04:35,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 04:04:35,047 INFO L470 AbstractCegarLoop]: Abstraction has 28572 states and 39488 transitions. [2021-11-23 04:04:35,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 2 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) [2021-11-23 04:04:35,048 INFO L276 IsEmpty]: Start isEmpty. Operand 28572 states and 39488 transitions. [2021-11-23 04:04:35,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-11-23 04:04:35,057 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 04:04:35,057 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:04:35,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-23 04:04:35,058 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 04:04:35,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 04:04:35,058 INFO L85 PathProgramCache]: Analyzing trace with hash -2114180809, now seen corresponding path program 1 times [2021-11-23 04:04:35,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 04:04:35,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911075657] [2021-11-23 04:04:35,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 04:04:35,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 04:04:36,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 04:04:36,747 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-23 04:04:36,747 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 04:04:36,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911075657] [2021-11-23 04:04:36,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911075657] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 04:04:36,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276675764] [2021-11-23 04:04:36,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 04:04:36,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 04:04:36,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 04:04:36,754 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 04:04:36,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 04:04:37,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 04:04:37,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 3262 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 04:04:37,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 04:04:38,238 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-11-23 04:04:38,239 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 04:04:38,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276675764] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 04:04:38,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 04:04:38,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2021-11-23 04:04:38,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504663825] [2021-11-23 04:04:38,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 04:04:38,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 04:04:38,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 04:04:38,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 04:04:38,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-23 04:04:38,242 INFO L87 Difference]: Start difference. First operand 28572 states and 39488 transitions. Second operand has 6 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 3 states have call successors, (52), 3 states have call predecessors, (52), 3 states have return successors, (51), 3 states have call predecessors, (51), 2 states have call successors, (51) [2021-11-23 04:04:43,167 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 04:04:46,067 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:04:49,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 04:04:49,704 INFO L93 Difference]: Finished difference Result 33122 states and 45828 transitions. [2021-11-23 04:04:49,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 04:04:49,704 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 3 states have call successors, (52), 3 states have call predecessors, (52), 3 states have return successors, (51), 3 states have call predecessors, (51), 2 states have call successors, (51) Word has length 330 [2021-11-23 04:04:49,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 04:04:49,799 INFO L225 Difference]: With dead ends: 33122 [2021-11-23 04:04:49,799 INFO L226 Difference]: Without dead ends: 33114 [2021-11-23 04:04:49,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-23 04:04:49,811 INFO L933 BasicCegarLoop]: 987 mSDtfsCounter, 795 mSDsluCounter, 3201 mSDsCounter, 0 mSdLazyCounter, 1886 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 798 SdHoareTripleChecker+Valid, 3592 SdHoareTripleChecker+Invalid, 1893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1886 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2021-11-23 04:04:49,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [798 Valid, 3592 Invalid, 1893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1886 Invalid, 2 Unknown, 0 Unchecked, 9.1s Time] [2021-11-23 04:04:49,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33114 states. [2021-11-23 04:04:52,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33114 to 32967. [2021-11-23 04:04:52,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32967 states, 20701 states have (on average 1.2565576542196029) internal successors, (26012), 21402 states have internal predecessors, (26012), 8930 states have call successors, (8930), 3314 states have call predecessors, (8930), 3335 states have return successors, (10660), 8500 states have call predecessors, (10660), 8925 states have call successors, (10660) [2021-11-23 04:04:52,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32967 states to 32967 states and 45602 transitions. [2021-11-23 04:04:52,572 INFO L78 Accepts]: Start accepts. Automaton has 32967 states and 45602 transitions. Word has length 330 [2021-11-23 04:04:52,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 04:04:52,573 INFO L470 AbstractCegarLoop]: Abstraction has 32967 states and 45602 transitions. [2021-11-23 04:04:52,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 3 states have call successors, (52), 3 states have call predecessors, (52), 3 states have return successors, (51), 3 states have call predecessors, (51), 2 states have call successors, (51) [2021-11-23 04:04:52,573 INFO L276 IsEmpty]: Start isEmpty. Operand 32967 states and 45602 transitions. [2021-11-23 04:04:52,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-11-23 04:04:52,581 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 04:04:52,582 INFO L514 BasicCegarLoop]: trace histogram [10, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:04:52,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 04:04:52,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 04:04:52,783 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 04:04:52,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 04:04:52,783 INFO L85 PathProgramCache]: Analyzing trace with hash -513259648, now seen corresponding path program 1 times [2021-11-23 04:04:52,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 04:04:52,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847364874] [2021-11-23 04:04:52,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 04:04:52,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 04:04:52,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 04:04:53,182 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2021-11-23 04:04:53,182 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 04:04:53,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847364874] [2021-11-23 04:04:53,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847364874] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 04:04:53,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 04:04:53,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 04:04:53,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540792112] [2021-11-23 04:04:53,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 04:04:53,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 04:04:53,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 04:04:53,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 04:04:53,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 04:04:53,186 INFO L87 Difference]: Start difference. First operand 32967 states and 45602 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 3 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (40), 3 states have call predecessors, (40), 3 states have call successors, (40) [2021-11-23 04:04:56,041 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 04:04:57,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 04:04:57,403 INFO L93 Difference]: Finished difference Result 40692 states and 56159 transitions. [2021-11-23 04:04:57,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 04:04:57,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 3 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (40), 3 states have call predecessors, (40), 3 states have call successors, (40) Word has length 322 [2021-11-23 04:04:57,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 04:04:57,441 INFO L225 Difference]: With dead ends: 40692 [2021-11-23 04:04:57,441 INFO L226 Difference]: Without dead ends: 11819 [2021-11-23 04:04:57,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 04:04:57,515 INFO L933 BasicCegarLoop]: 741 mSDtfsCounter, 799 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 799 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-23 04:04:57,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [799 Valid, 741 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2021-11-23 04:04:57,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11819 states. [2021-11-23 04:04:58,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11819 to 11683. [2021-11-23 04:04:58,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11683 states, 7407 states have (on average 1.2563791008505467) internal successors, (9306), 7628 states have internal predecessors, (9306), 3112 states have call successors, (3112), 1152 states have call predecessors, (3112), 1163 states have return successors, (3673), 2977 states have call predecessors, (3673), 3110 states have call successors, (3673) [2021-11-23 04:04:58,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11683 states to 11683 states and 16091 transitions. [2021-11-23 04:04:58,517 INFO L78 Accepts]: Start accepts. Automaton has 11683 states and 16091 transitions. Word has length 322 [2021-11-23 04:04:58,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 04:04:58,518 INFO L470 AbstractCegarLoop]: Abstraction has 11683 states and 16091 transitions. [2021-11-23 04:04:58,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 3 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (40), 3 states have call predecessors, (40), 3 states have call successors, (40) [2021-11-23 04:04:58,518 INFO L276 IsEmpty]: Start isEmpty. Operand 11683 states and 16091 transitions. [2021-11-23 04:04:58,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2021-11-23 04:04:58,535 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 04:04:58,536 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 04:04:58,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-23 04:04:58,536 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 04:04:58,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 04:04:58,537 INFO L85 PathProgramCache]: Analyzing trace with hash -990506101, now seen corresponding path program 1 times [2021-11-23 04:04:58,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 04:04:58,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126126143] [2021-11-23 04:04:58,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 04:04:58,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 04:04:58,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 04:04:58,995 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2021-11-23 04:04:58,995 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 04:04:58,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126126143] [2021-11-23 04:04:58,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126126143] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 04:04:58,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 04:04:58,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 04:04:58,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920049655] [2021-11-23 04:04:58,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 04:04:58,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 04:04:59,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 04:04:59,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 04:04:59,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 04:04:59,002 INFO L87 Difference]: Start difference. First operand 11683 states and 16091 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) [2021-11-23 04:05:02,507 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 04:05:04,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 04:05:04,372 INFO L93 Difference]: Finished difference Result 19273 states and 26465 transitions. [2021-11-23 04:05:04,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 04:05:04,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) Word has length 460 [2021-11-23 04:05:04,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 04:05:04,429 INFO L225 Difference]: With dead ends: 19273 [2021-11-23 04:05:04,430 INFO L226 Difference]: Without dead ends: 11684 [2021-11-23 04:05:04,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 04:05:04,460 INFO L933 BasicCegarLoop]: 1153 mSDtfsCounter, 289 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 1967 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-23 04:05:04,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 1967 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 337 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2021-11-23 04:05:04,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11684 states. [2021-11-23 04:05:05,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11684 to 11679. [2021-11-23 04:05:05,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11679 states, 7405 states have (on average 1.2561782579338285) internal successors, (9302), 7626 states have internal predecessors, (9302), 3110 states have call successors, (3110), 1152 states have call predecessors, (3110), 1163 states have return successors, (3671), 2975 states have call predecessors, (3671), 3108 states have call successors, (3671) [2021-11-23 04:05:05,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11679 states to 11679 states and 16083 transitions. [2021-11-23 04:05:05,409 INFO L78 Accepts]: Start accepts. Automaton has 11679 states and 16083 transitions. Word has length 460 [2021-11-23 04:05:05,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 04:05:05,409 INFO L470 AbstractCegarLoop]: Abstraction has 11679 states and 16083 transitions. [2021-11-23 04:05:05,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) [2021-11-23 04:05:05,409 INFO L276 IsEmpty]: Start isEmpty. Operand 11679 states and 16083 transitions. [2021-11-23 04:05:05,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2021-11-23 04:05:05,422 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 04:05:05,423 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 04:05:05,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-23 04:05:05,423 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 04:05:05,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 04:05:05,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1200932111, now seen corresponding path program 1 times [2021-11-23 04:05:05,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 04:05:05,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187943006] [2021-11-23 04:05:05,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 04:05:05,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 04:05:05,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 04:05:05,883 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2021-11-23 04:05:05,884 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 04:05:05,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187943006] [2021-11-23 04:05:05,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187943006] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 04:05:05,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 04:05:05,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 04:05:05,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176429091] [2021-11-23 04:05:05,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 04:05:05,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 04:05:05,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 04:05:05,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 04:05:05,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 04:05:05,888 INFO L87 Difference]: Start difference. First operand 11679 states and 16083 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) [2021-11-23 04:05:09,883 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 04:05:11,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 04:05:11,629 INFO L93 Difference]: Finished difference Result 19265 states and 26449 transitions. [2021-11-23 04:05:11,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 04:05:11,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) Word has length 460 [2021-11-23 04:05:11,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 04:05:11,677 INFO L225 Difference]: With dead ends: 19265 [2021-11-23 04:05:11,677 INFO L226 Difference]: Without dead ends: 11680 [2021-11-23 04:05:11,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 04:05:11,700 INFO L933 BasicCegarLoop]: 1149 mSDtfsCounter, 284 mSDsluCounter, 955 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 1966 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-23 04:05:11,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [397 Valid, 1966 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 337 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2021-11-23 04:05:11,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11680 states. [2021-11-23 04:05:12,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11680 to 11675. [2021-11-23 04:05:12,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11675 states, 7403 states have (on average 1.2559773064973658) internal successors, (9298), 7624 states have internal predecessors, (9298), 3108 states have call successors, (3108), 1152 states have call predecessors, (3108), 1163 states have return successors, (3669), 2973 states have call predecessors, (3669), 3106 states have call successors, (3669) [2021-11-23 04:05:12,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11675 states to 11675 states and 16075 transitions. [2021-11-23 04:05:12,660 INFO L78 Accepts]: Start accepts. Automaton has 11675 states and 16075 transitions. Word has length 460 [2021-11-23 04:05:12,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 04:05:12,661 INFO L470 AbstractCegarLoop]: Abstraction has 11675 states and 16075 transitions. [2021-11-23 04:05:12,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) [2021-11-23 04:05:12,661 INFO L276 IsEmpty]: Start isEmpty. Operand 11675 states and 16075 transitions. [2021-11-23 04:05:12,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2021-11-23 04:05:12,674 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 04:05:12,674 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 04:05:12,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-23 04:05:12,675 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 04:05:12,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 04:05:12,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1244609171, now seen corresponding path program 1 times [2021-11-23 04:05:12,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 04:05:12,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297760457] [2021-11-23 04:05:12,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 04:05:12,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 04:05:17,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 04:05:18,418 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 710 trivial. 0 not checked. [2021-11-23 04:05:18,419 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 04:05:18,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297760457] [2021-11-23 04:05:18,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297760457] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 04:05:18,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646048164] [2021-11-23 04:05:18,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 04:05:18,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 04:05:18,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 04:05:18,427 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 04:05:18,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 04:05:19,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 04:05:19,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 4298 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 04:05:19,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 04:05:20,763 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 434 proven. 0 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-11-23 04:05:20,763 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 04:05:20,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646048164] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 04:05:20,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 04:05:20,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2021-11-23 04:05:20,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577555028] [2021-11-23 04:05:20,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 04:05:20,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 04:05:20,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 04:05:20,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 04:05:20,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-23 04:05:20,765 INFO L87 Difference]: Start difference. First operand 11675 states and 16075 transitions. Second operand has 6 states, 5 states have (on average 38.2) internal successors, (191), 5 states have internal predecessors, (191), 3 states have call successors, (66), 3 states have call predecessors, (66), 3 states have return successors, (65), 3 states have call predecessors, (65), 2 states have call successors, (65) [2021-11-23 04:05:26,039 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 04:05:29,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 04:05:29,488 INFO L93 Difference]: Finished difference Result 13429 states and 18472 transitions. [2021-11-23 04:05:29,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 04:05:29,488 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 38.2) internal successors, (191), 5 states have internal predecessors, (191), 3 states have call successors, (66), 3 states have call predecessors, (66), 3 states have return successors, (65), 3 states have call predecessors, (65), 2 states have call successors, (65) Word has length 460 [2021-11-23 04:05:29,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 04:05:29,527 INFO L225 Difference]: With dead ends: 13429 [2021-11-23 04:05:29,527 INFO L226 Difference]: Without dead ends: 13421 [2021-11-23 04:05:29,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 457 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-23 04:05:29,533 INFO L933 BasicCegarLoop]: 914 mSDtfsCounter, 657 mSDsluCounter, 2873 mSDsCounter, 0 mSdLazyCounter, 1808 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 3256 SdHoareTripleChecker+Invalid, 1814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1808 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2021-11-23 04:05:29,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [658 Valid, 3256 Invalid, 1814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1808 Invalid, 1 Unknown, 0 Unchecked, 7.6s Time] [2021-11-23 04:05:29,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13421 states. [2021-11-23 04:05:30,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13421 to 9309. [2021-11-23 04:05:30,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9309 states, 5899 states have (on average 1.2549584675368706) internal successors, (7403), 6078 states have internal predecessors, (7403), 2466 states have call successors, (2466), 930 states have call predecessors, (2466), 943 states have return successors, (2901), 2358 states have call predecessors, (2901), 2464 states have call successors, (2901) [2021-11-23 04:05:30,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9309 states to 9309 states and 12770 transitions. [2021-11-23 04:05:30,391 INFO L78 Accepts]: Start accepts. Automaton has 9309 states and 12770 transitions. Word has length 460 [2021-11-23 04:05:30,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 04:05:30,392 INFO L470 AbstractCegarLoop]: Abstraction has 9309 states and 12770 transitions. [2021-11-23 04:05:30,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 38.2) internal successors, (191), 5 states have internal predecessors, (191), 3 states have call successors, (66), 3 states have call predecessors, (66), 3 states have return successors, (65), 3 states have call predecessors, (65), 2 states have call successors, (65) [2021-11-23 04:05:30,393 INFO L276 IsEmpty]: Start isEmpty. Operand 9309 states and 12770 transitions. [2021-11-23 04:05:30,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 565 [2021-11-23 04:05:30,425 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 04:05:30,426 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:05:30,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 04:05:30,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 04:05:30,639 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 04:05:30,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 04:05:30,640 INFO L85 PathProgramCache]: Analyzing trace with hash 721958706, now seen corresponding path program 1 times [2021-11-23 04:05:30,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 04:05:30,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839727223] [2021-11-23 04:05:30,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 04:05:30,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 04:05:38,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 04:05:38,725 INFO L134 CoverageAnalysis]: Checked inductivity of 848 backedges. 65 proven. 15 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2021-11-23 04:05:38,726 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 04:05:38,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839727223] [2021-11-23 04:05:38,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839727223] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 04:05:38,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103575530] [2021-11-23 04:05:38,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 04:05:38,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 04:05:38,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 04:05:38,735 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 04:05:38,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 04:05:40,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 04:05:40,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 5015 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 04:05:40,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 04:05:41,438 INFO L134 CoverageAnalysis]: Checked inductivity of 848 backedges. 502 proven. 0 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2021-11-23 04:05:41,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 04:05:41,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103575530] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 04:05:41,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 04:05:41,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2021-11-23 04:05:41,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288892393] [2021-11-23 04:05:41,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 04:05:41,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 04:05:41,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 04:05:41,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 04:05:41,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-23 04:05:41,440 INFO L87 Difference]: Start difference. First operand 9309 states and 12770 transitions. Second operand has 6 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 3 states have call successors, (82), 3 states have call predecessors, (82), 3 states have return successors, (81), 3 states have call predecessors, (81), 2 states have call successors, (81) [2021-11-23 04:05:46,529 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 04:05:49,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 04:05:49,868 INFO L93 Difference]: Finished difference Result 11045 states and 15127 transitions. [2021-11-23 04:05:49,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 04:05:49,869 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 3 states have call successors, (82), 3 states have call predecessors, (82), 3 states have return successors, (81), 3 states have call predecessors, (81), 2 states have call successors, (81) Word has length 564 [2021-11-23 04:05:49,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 04:05:49,870 INFO L225 Difference]: With dead ends: 11045 [2021-11-23 04:05:49,870 INFO L226 Difference]: Without dead ends: 0 [2021-11-23 04:05:49,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 561 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-23 04:05:49,891 INFO L933 BasicCegarLoop]: 915 mSDtfsCounter, 663 mSDsluCounter, 2864 mSDsCounter, 0 mSdLazyCounter, 1839 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 3232 SdHoareTripleChecker+Invalid, 1845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1839 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2021-11-23 04:05:49,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [666 Valid, 3232 Invalid, 1845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1839 Invalid, 1 Unknown, 0 Unchecked, 7.5s Time] [2021-11-23 04:05:49,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-23 04:05:49,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-23 04:05:49,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 04:05:49,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-23 04:05:49,893 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 564 [2021-11-23 04:05:49,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 04:05:49,894 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-23 04:05:49,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 3 states have call successors, (82), 3 states have call predecessors, (82), 3 states have return successors, (81), 3 states have call predecessors, (81), 2 states have call successors, (81) [2021-11-23 04:05:49,894 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-23 04:05:49,894 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-23 04:05:49,897 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 04:05:49,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-23 04:05:50,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fd406a1-a667-4f50-9d7a-4519229e251a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-23 04:05:50,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.